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AD7606C-16 || Digital Data to Voltage Conversion

Category: Hardware
Product Number: AD7606C-16

Hi Team,

I am using AD7606C-16 ADC IC for my receiver system.  I want to validate the ADC-received samples to my scope waveform. I am doubting what should I consider the value of Full Scale Range in the calculation formula.

Please Note: I haven't made any configuration changes for the ADC IC. 

Conversion formula:

Voltage= (Digital Data)* Full Scale Range / ((2^16)-1)

In the Oscilloscope I am seeing Vpp (measured at P wrt N I/p of ADC) is ~3.0Vpp

I am attaching the Digital Data, Pls suggest are the samples Ok. What Should I consider the Full Scale Range for my calculation?
CONVST Freq: 108KHz
Input Frequency: 27KHz


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    -2390	-2478	-2363	-2401	-2290	-2442	-2501	-2311	-2268	-2332	-2275	-2403	-2360	-2285	-2357	-2413	-2435	-2404	-2367	-2409	-2421	-2340	-2343	-2561	-2484	-2251	-2548	-2451	-2413	-2487	-2362	-2435
    2717	2716	2560	2863	2658	2780	2811	2700	2714	2817	2830	2918	2656	2639	2665	2701	2806	3013	2574	2657	2486	2773	2802	2536	2587	2733	2609	2639	2817	2816	2698	2830
    2156	2204	2118	2160	1996	2197	2243	2078	2014	2055	1998	2132	2101	2042	2115	2222	2244	2219	2057	2182	2102	2078	2078	2293	2285	2052	2319	2201	2206	2287	2234	2262
    -2955	-2993	-2808	-3102	-2955	-3027	-3074	-2936	-2977	-3094	-3111	-3196	-2921	-2886	-2910	-2896	-2997	-3204	-2888	-2893	-2808	-3042	-3069	-2810	-2790	-2937	-2844	-2895	-3030	-3021	-2834	-3010
    -2392	-2483	-2367	-2403	-2291	-2445	-2505	-2314	-2274	-2334	-2276	-2410	-2367	-2291	-2360	-2415	-2439	-2408	-2368	-2416	-2424	-2342	-2345	-2569	-2488	-2254	-2554	-2456	-2419	-2492	-2369	-2438
    2721	2720	2561	2861	2661	2782	2812	2704	2724	2813	2832	2924	2657	2641	2666	2702	2800	3020	2574	2666	2487	2779	2802	2542	2588	2740	2609	2644	2817	2821	2704	2837
    2159	2211	2126	2163	2000	2200	2248	2080	2019	2057	1997	2138	2110	2049	2121	2224	2248	2222	2058	2188	2108	2080	2082	2300	2291	2057	2327	2205	2212	2295	2241	2266
    -2956	-2996	-2808	-3100	-2955	-3030	-3073	-2938	-2980	-3088	-3110	-3201	-2920	-2887	-2906	-2891	-2995	-3211	-2886	-2898	-2808	-3040	-3066	-2810	-2788	-2939	-2842	-2892	-3029	-3020	-2840	-3009
    -2396	-2490	-2374	-2406	-2296	-2449	-2511	-2314	-2278	-2339	-2277	-2415	-2376	-2299	-2366	-2420	-2446	-2408	-2371	-2418	-2430	-2343	-2348	-2569	-2495	-2258	-2562	-2457	-2426	-2498	-2375	-2440
    2718	2720	2561	2860	2658	2782	2810	2703	2721	2808	2828	2928	2655	2640	2659	2694	2802	3025	2572	2667	2487	2771	2796	2539	2586	2739	2609	2640	2816	2818	2707	2833
    2161	2215	2132	2169	2002	2203	2252	2079	2022	2065	1997	2140	2116	2054	2125	2231	2255	2221	2058	2190	2113	2082	2083	2300	2298	2062	2331	2208	2216	2301	2244	2267
    -2951	-2991	-2808	-3100	-2950	-3025	-3069	-2932	-2974	-3083	-3102	-3200	-2918	-2884	-2899	-2879	-2992	-3212	-2880	-2896	-2805	-3030	-3059	-2807	-2785	-2937	-2838	-2891	-3025	-3018	-2839	-3003
    -2395	-2490	-2376	-2407	-2294	-2451	-2512	-2313	-2278	-2344	-2274	-2415	-2380	-2300	-2364	-2426	-2448	-2407	-2369	-2420	-2435	-2346	-2348	-2567	-2499	-2260	-2565	-2461	-2425	-2503	-2374	-2444
    2712	2716	2563	2864	2653	2779	2808	2696	2714	2806	2820	2926	2654	2639	2653	2684	2799	3020	2570	2663	2484	2761	2792	2535	2583	2734	2605	2638	2814	2812	2706	2824
    2160	2212	2129	2164	1999	2202	2251	2075	2022	2066	1997	2139	2115	2050	2121	2236	2253	2219	2056	2188	2113	2081	2082	2294	2298	2057	2330	2207	2212	2301	2241	2267
    -2948	-2989	-2808	-3107	-2946	-3024	-3068	-2926	-2969	-3085	-3099	-3200	-2919	-2883	-2895	-2874	-2993	-3201	-2881	-2891	-2802	-3019	-3057	-2801	-2786	-2932	-2836	-2889	-3026	-3008	-2836	-2993
    -2392	-2484	-2370	-2400	-2289	-2448	-2509	-2307	-2278	-2343	-2274	-2412	-2374	-2294	-2358	-2429	-2443	-2407	-2365	-2416	-2431	-2345	-2345	-2562	-2497	-2256	-2557	-2459	-2419	-2502	-2370	-2442
    2710	2712	2563	2873	2651	2779	2807	2689	2710	2809	2821	2926	2655	2637	2654	2684	2801	3015	2569	2661	2481	2756	2791	2532	2583	2733	2602	2641	2814	2806	2701	2818
    2156	2206	2122	2156	1994	2198	2247	2072	2020	2064	1996	2135	2107	2045	2111	2235	2244	2220	2051	2183	2108	2080	2080	2289	2293	2054	2318	2205	2204	2299	2234	2266
    -2946	-2983	-2808	-3112	-2946	-3022	-3068	-2919	-2965	-3085	-3102	-3200	-2921	-2882	-2898	-2877	-2995	-3199	-2882	-2891	-2802	-3022	-3063	-2802	-2788	-2934	-2833	-2895	-3029	-3007	-2833	-2993
    -2388	-2478	-2365	-2394	-2288	-2442	-2505	-2305	-2275	-2339	-2276	-2408	-2365	-2290	-2349	-2427	-2434	-2408	-2363	-2412	-2426	-2342	-2344	-2558	-2495	-2251	-2546	-2454	-2413	-2499	-2365	-2439
    2710	2710	2561	2875	2654	2778	2806	2685	2705	2809	2823	2930	2657	2636	2655	2688	2801	3011	2571	2660	2481	2759	2801	2531	2589	2734	2600	2643	2820	2805	2702	2820
    2153	2202	2122	2154	1996	2194	2245	2070	2019	2059	1998	2131	2099	2043	2105	2232	2238	2224	2054	2182	2106	2077	2078	2289	2292	2055	2312	2201	2200	2297	2232	2264
    -2949	-2981	-2807	-3113	-2950	-3024	-3068	-2920	-2962	-3084	-3105	-3204	-2922	-2882	-2898	-2883	-2995	-3198	-2882	-2891	-2803	-3025	-3070	-2802	-2793	-2934	-2832	-2896	-3032	-3008	-2833	-2998
    -2387	-2479	-2368	-2395	-2291	-2441	-2505	-2306	-2274	-2336	-2277	-2404	-2360	-2289	-2346	-2421	-2430	-2412	-2366	-2411	-2423	-2341	-2340	-2561	-2491	-2255	-2544	-2451	-2408	-2497	-2362	-2440
    2716	2708	2560	2872	2659	2779	2808	2688	2703	2809	2827	2929	2658	2638	2655	2695	2803	3012	2571	2661	2481	2765	2808	2533	2594	2737	2599	2642	2822	2808	2702	2826
    2151	2205	2125	2156	1999	2193	2245	2071	2019	2059	1998	2128	2096	2043	2103	2226	2237	2223	2058	2182	2102	2076	2077	2293	2291	2056	2313	2198	2198	2293	2233	2265
    -2953	-2982	-2806	-3110	-2956	-3025	-3068	-2923	-2961	-3086	-3108	-3200	-2923	-2885	-2896	-2888	-2998	-3198	-2884	-2888	-2800	-3029	-3074	-2802	-2795	-2933	-2833	-2890	-3034	-3006	-2834	-3000
    -2387	-2481	-2372	-2400	-2295	-2441	-2506	-2304	-2275	-2337	-2275	-2404	-2357	-2291	-2347	-2416	-2431	-2411	-2371	-2413	-2422	-2337	-2340	-2565	-2492	-2256	-2546	-2449	-2407	-2491	-2366	-2440
    2718	2710	2561	2870	2663	2779	2808	2692	2703	2810	2828	2924	2659	2640	2651	2695	2806	3013	2571	2661	2478	2771	2808	2535	2593	2737	2602	2638	2821	2808	2705	2830
    2151	2206	2126	2161	2002	2193	2247	2068	2020	2059	1994	2130	2097	2044	2107	2221	2237	2223	2061	2184	2101	2073	2074	2296	2290	2058	2316	2197	2196	2290	2235	2263
    -2956	-2985	-2811	-3107	-2961	-3022	-3070	-2929	-2961	-3087	-3106	-3195	-2923	-2886	-2894	-2883	-3003	-3205	-2885	-2892	-2799	-3038	-3074	-2809	-2795	-2938	-2839	-2891	-3031	-3012	-2840	-3008
    -2385	-2483	-2371	-2401	-2297	-2443	-2508	-2302	-2276	-2340	-2271	-2407	-2360	-2293	-2349	-2415	-2433	-2410	-2375	-2415	-2422	-2336	-2342	-2567	-2494	-2259	-2549	-2450	-2406	-2490	-2368	-2438
    2721	2714	2568	2868	2668	2777	2813	2699	2707	2813	2827	2921	2660	2644	2651	2692	2812	3018	2575	2665	2480	2777	2808	2540	2593	2738	2608	2638	2822	2811	2712	2834
    2153	2208	2126	2161	2006	2199	2251	2068	2024	2063	1993	2133	2100	2047	2112	2226	2240	2222	2065	2184	2103	2069	2077	2296	2293	2058	2319	2198	2198	2289	2237	2261
    -2960	-2990	-2817	-3107	-2964	-3024	-3075	-2936	-2968	-3090	-3106	-3195	-2924	-2891	-2895	-2883	-3007	-3209	-2888	-2899	-2803	-3043	-3072	-2813	-2794	-2939	-2841	-2892	-3031	-3013	-2844	-3008
    -2392	-2486	-2372	-2401	-2302	-2450	-2513	-2304	-2282	-2343	-2273	-2412	-2365	-2297	-2358	-2424	-2433	-2410	-2376	-2415	-2424	-2335	-2344	-2569	-2496	-2260	-2551	-2452	-2411	-2494	-2368	-2437
    2725	2718	2572	2867	2670	2778	2816	2702	2713	2815	2827	2921	2660	2645	2653	2692	2812	3025	2577	2669	2482	2780	2804	2543	2590	2737	2607	2640	2820	2812	2712	2830
    2159	2212	2126	2163	2011	2208	2255	2071	2029	2066	1998	2138	2107	2052	2120	2237	2243	2222	2067	2184	2107	2071	2082	2301	2299	2061	2323	2202	2206	2296	2239	2264
    -2961	-2992	-2818	-3105	-2965	-3025	-3077	-2936	-2974	-3091	-3106	-3195	-2921	-2890	-2897	-2883	-3005	-3212	-2889	-2897	-2802	-3042	-3070	-2811	-2791	-2933	-2838	-2890	-3032	-3013	-2843	-3002
    -2393	-2490	-2370	-2405	-2303	-2456	-2515	-2310	-2286	-2346	-2277	-2416	-2373	-2299	-2366	-2434	-2439	-2408	-2379	-2413	-2431	-2337	-2350	-2572	-2503	-2262	-2558	-2455	-2420	-2500	-2372	-2440
    2724	2717	2569	2865	2667	2777	2814	2700	2719	2813	2826	2919	2656	2642	2655	2692	2811	3024	2577	2664	2481	2775	2804	2540	2586	2731	2602	2635	2821	2810	2707	2827
    2159	2215	2128	2165	2012	2209	2258	2077	2029	2068	2002	2140	2115	2051	2127	2242	2248	2221	2066	2183	2111	2075	2087	2304	2303	2063	2330	2207	2213	2302	2241	2269
    -2956	-2991	-2810	-3103	-2957	-3024	-3071	-2933	-2974	-3092	-3103	-3192	-2917	-2886	-2897	-2883	-3004	-3209	-2886	-2891	-2800	-3034	-3067	-2807	-2785	-2927	-2828	-2885	-3031	-3011	-2834	-3001
    -2393	-2491	-2372	-2405	-2303	-2454	-2516	-2315	-2286	-2347	-2281	-2413	-2380	-2298	-2370	-2436	-2440	-2408	-2376	-2414	-2429	-2340	-2351	-2575	-2501	-2263	-2563	-2461	-2422	-2504	-2372	-2446
    2717	2712	2561	2861	2659	2774	2808	2695	2714	2812	2822	2912	2654	2635	2655	2689	2810	3019	2573	2656	2480	2765	2800	2532	2582	2723	2592	2631	2820	2806	2699	2824
    2158	2215	2127	2162	2008	2201	2255	2080	2027	2067	2002	2135	2116	2046	2128	2242	2248	2219	2064	2182	2108	2075	2086	2302	2297	2061	2334	2208	2211	2300	2241	2269
    -2947	-2984	-2803	-3099	-2947	-3018	-3066	-2925	-2967	-3091	-3100	-3184	-2915	-2878	-2897	-2881	-3003	-3201	-2883	-2881	-2798	-3023	-3065	-2798	-2781	-2918	-2821	-2881	-3028	-3001	-2826	-2997
    -2389	-2489	-2368	-2398	-2298	-2443	-2510	-2316	-2280	-2342	-2277	-2405	-2375	-2290	-2364	-2432	-2439	-2405	-2374	-2412	-2424	-2338	-2349	-2572	-2494	-2261	-2565	-2460	-2418	-2499	-2370	-2443
    2712	2707	2555	2857	2649	2769	2804	2688	2708	2814	2821	2906	2651	2627	2655	2688	2809	3016	2570	2653	2476	2759	2798	2529	2577	2721	2590	2631	2815	2800	2691	2823
    2154	2208	2124	2153	2004	2191	2250	2077	2022	2059	1996	2126	2109	2037	2120	2233	2242	2218	2060	2182	2098	2076	2082	2298	2287	2059	2331	2205	2206	2294	2236	2265
    -2947	-2982	-2800	-3095	-2940	-3015	-3065	-2926	-2960	-3092	-3100	-3182	-2914	-2874	-2897	-2882	-3003	-3202	-2883	-2884	-2799	-3022	-3064	-2800	-2781	-2925	-2826	-2885	-3026	-3004	-2823	-2999
    -2386	-2480	-2364	-2393	-2295	-2438	-2508	-2311	-2277	-2335	-2269	-2401	-2368	-2284	-2356	-2423	-2430	-2406	-2372	-2411	-2417	-2339	-2345	-2567	-2485	-2257	-2561	-2454	-2414	-2493	-2365	-2437
    2713	2706	2555	2857	2648	2769	2808	2694	2701	2814	2822	2909	2652	2628	2656	2691	2812	3013	2573	2655	2482	2761	2798	2532	2581	2730	2598	2634	2814	2805	2691	2825
    2152	2201	2118	2151	2000	2190	2248	2073	2022	2055	1990	2124	2105	2033	2112	2225	2235	2217	2061	2179	2094	2075	2079	2291	2282	2055	2323	2198	2201	2289	2233	2258
    -2952	-2982	-2802	-3098	-2943	-3017	-3072	-2932	-2958	-3095	-3101	-3187	-2917	-2879	-2899	-2885	-3004	-3207	-2887	-2889	-2806	-3029	-3066	-2806	-2785	-2935	-2833	-2892	-3025	-3011	-2824	-3002
    -2386	-2476	-2363	-2394	-2292	-2440	-2507	-2306	-2278	-2334	-2266	-2401	-2365	-2282	-2351	-2417	-2425	-2408	-2372	-2410	-2410	-2338	-2341	-2559	-2480	-2255	-2550	-2451	-2409	-2493	-2363	-2434
    2720	2708	2558	2862	2650	2773	2815	2700	2703	2815	2824	2915	2656	2635	2657	2692	2811	3020	2577	2661	2488	2768	2802	2539	2583	2740	2602	2643	2814	2813	2693	2830
    2152	2200	2117	2156	1998	2194	2250	2069	2021	2057	1989	2129	2104	2035	2108	2220	2232	2221	2061	2179	2092	2076	2077	2286	2279	2054	2317	2199	2201	2292	2233	2259
    -2956	-2986	-2804	-3104	-2945	-3024	-3078	-2935	-2960	-3093	-3102	-3196	-2919	-2884	-2898	-2887	-3004	-3209	-2892	-2889	-2811	-3033	-3069	-2810	-2787	-2941	-2837	-2896	-3026	-3021	-2827	-3005
    -2386	-2477	-2359	-2399	-2289	-2444	-2510	-2304	-2275	-2338	-2266	-2407	-2363	-2285	-2350	-2415	-2425	-2409	-2374	-2410	-2413	-2341	-2342	-2555	-2481	-2252	-2547	-2450	-2412	-2491	-2367	-2435
    2723	2711	2560	2868	2652	2780	2820	2699	2706	2814	2826	2923	2659	2640	2656	2694	2810	3026	2581	2662	2492	2772	2806	2541	2587	2743	2606	2648	2817	2824	2696	2831
    2154	2203	2117	2158	1998	2196	2252	2070	2019	2063	1993	2133	2102	2039	2111	2221	2231	2222	2060	2180	2095	2079	2076	2285	2282	2051	2314	2197	2205	2293	2237	2262
    -2957	-2988	-2806	-3110	-2946	-3030	-3080	-2933	-2964	-3092	-3107	-3203	-2923	-2890	-2899	-2889	-3000	-3214	-2891	-2890	-2812	-3037	-3072	-2811	-2790	-2942	-2835	-2902	-3028	-3027	-2829	-3006
    -2387	-2481	-2362	-2400	-2290	-2446	-2514	-2307	-2273	-2343	-2273	-2410	-2366	-2289	-2352	-2416	-2423	-2410	-2371	-2410	-2417	-2343	-2340	-2556	-2486	-2253	-2545	-2450	-2416	-2493	-2369	-2437
    2723	2714	2562	2871	2654	2785	2818	2701	2710	2813	2831	2930	2661	2646	2658	2698	2806	3028	2579	2659	2494	2774	2808	2541	2591	2739	2603	2648	2821	2826	2700	2828
    2152	2206	2121	2157	1997	2198	2258	2074	2017	2068	1995	2134	2102	2041	2113	2226	2233	2221	2060	2178	2100	2079	2076	2285	2288	2052	2314	2196	2206	2292	2239	2262
    -2958	-2991	-2810	-3113	-2949	-3034	-3077	-2938	-2968	-3093	-3112	-3208	-2925	-2894	-2903	-2895	-2998	-3214	-2891	-2888	-2813	-3036	-3074	-2810	-2794	-2938	-2834	-2900	-3032	-3024	-2832	-3001
    -2389	-2483	-2366	-2398	-2292	-2447	-2518	-2311	-2273	-2348	-2274	-2410	-2362	-2289	-2353	-2419	-2428	-2408	-2371	-2412	-2421	-2343	-2343	-2560	-2492	-2257	-2549	-2451	-2417	-2496	-2372	-2438
    2722	2715	2564	2873	2658	2788	2815	2706	2711	2815	2836	2932	2663	2645	2664	2703	2802	3028	2577	2659	2491	2774	2807	2539	2592	2740	2602	2649	2821	2824	2700	2828
    2156	2209	2125	2155	2002	2200	2263	2076	2021	2068	1999	2134	2102	2041	2113	2226	2240	2220	2061	2184	2104	2079	2081	2292	2293	2060	2319	2202	2208	2298	2239	2265
    -2959	-2991	-2811	-3111	-2951	-3035	-3073	-2943	-2968	-3094	-3113	-3206	-2924	-2891	-2906	-2899	-2997	-3215	-2887	-2890	-2811	-3035	-3073	-2810	-2796	-2940	-2835	-2901	-3034	-3023	-2833	-3003
    -2392	-2486	-2372	-2398	-2296	-2449	-2524	-2313	-2280	-2349	-2276	-2413	-2364	-2290	-2356	-2422	-2436	-2408	-2375	-2417	-2424	-2343	-2347	-2565	-2497	-2263	-2552	-2457	-2418	-2504	-2370	-2441
    2724	2714	2565	2870	2661	2786	2810	2708	2711	2814	2835	2928	2659	2640	2664	2705	2805	3025	2575	2657	2489	2769	2807	2537	2594	2738	2603	2646	2821	2818	2701	2827
    2161	2212	2130	2160	2007	2204	2265	2078	2030	2071	2002	2137	2105	2044	2115	2231	2249	2221	2066	2189	2106	2079	2083	2298	2299	2066	2322	2208	2208	2304	2240	2267
    -2958	-2987	-2809	-3107	-2953	-3030	-3068	-2941	-2967	-3091	-3113	-3201	-2918	-2882	-2902	-2894	-2997	-3212	-2884	-2887	-2804	-3029	-3070	-2810	-2790	-2938	-2830	-2897	-3028	-3019	-2830	-3004
    -2395	-2490	-2376	-2402	-2302	-2453	-2524	-2316	-2288	-2351	-2281	-2415	-2370	-2293	-2359	-2426	-2439	-2411	-2376	-2421	-2423	-2346	-2348	-2571	-2499	-2267	-2550	-2461	-2417	-2505	-2369	-2444
    2721	2707	2561	2864	2660	2780	2805	2702	2711	2811	2832	2920	2653	2631	2657	2695	2803	3020	2572	2655	2480	2761	2803	2539	2585	2732	2595	2640	2815	2815	2696	2828
    2159	2213	2132	2161	2008	2204	2264	2079	2034	2072	2003	2138	2110	2046	2118	2233	2249	2223	2066	2190	2105	2083	2085	2299	2298	2066	2322	2207	2207	2301	2239	2268
    -2953	-2981	-2802	-3100	-2952	-3025	-3063	-2932	-2968	-3089	-3111	-3192	-2913	-2875	-2895	-2883	-2996	-3203	-2882	-2881	-2799	-3019	-3067	-2806	-2785	-2926	-2824	-2888	-3025	-3012	-2823	-3000
    -2391	-2488	-2374	-2401	-2298	-2450	-2519	-2315	-2286	-2351	-2279	-2416	-2371	-2295	-2359	-2429	-2441	-2410	-2375	-2417	-2426	-2346	-2348	-2568	-2494	-2263	-2553	-2457	-2414	-2498	-2369	-2440
    2716	2701	2556	2856	2655	2775	2801	2694	2712	2807	2830	2912	2648	2628	2651	2686	2802	3015	2569	2651	2476	2756	2800	2535	2581	2725	2590	2634	2812	2810	2688	2828
    2156	2209	2128	2159	2004	2198	2258	2076	2029	2068	1999	2139	2110	2045	2119	2235	2246	2220	2061	2185	2106	2082	2081	2293	2289	2059	2319	2201	2200	2290	2235	2261
    -2951	-2976	-2801	-3096	-2949	-3022	-3062	-2928	-2970	-3087	-3109	-3187	-2910	-2875	-2893	-2878	-2995	-3201	-2883	-2881	-2798	-3022	-3067	-2805	-2782	-2924	-2822	-2885	-3024	-3009	-2818	-3002
    -2388	-2484	-2370	-2399	-2295	-2442	-2512	-2312	-2281	-2344	-2274	-2416	-2371	-2292	-2359	-2429	-2435	-2404	-2369	-2411	-2425	-2342	-2345	-2562	-2485	-2254	-2551	-2451	-2410	-2486	-2363	-2432
    2717	2702	2557	2855	2657	2775	2805	2692	2714	2808	2829	2912	2648	2630	2655	2685	2802	3012	2573	2651	2481	2759	2802	2533	2581	2724	2593	2634	2813	2808	2686	2827
    2152	2206	2125	2157	2002	2191	2250	2076	2024	2062	1995	2138	2106	2041	2119	2233	2240	2213	2053	2175	2105	2075	2078	2288	2280	2049	2317	2196	2198	2280	2230	2251
    -2952	-2980	-2805	-3098	-2954	-3023	-3069	-2931	-2970	-3089	-3108	-3190	-2912	-2879	-2901	-2881	-2996	-3201	-2887	-2885	-2804	-3026	-3068	-2804	-2783	-2925	-2828	-2887	-3024	-3009	-2820	-3003
    -2384	-2483	-2371	-2397	-2293	-2436	-2504	-2312	-2276	-2338	-2271	-2414	-2365	-2288	-2357	-2426	-2431	-2399	-2362	-2404	-2422	-2339	-2343	-2560	-2479	-2249	-2546	-2449	-2406	-2482	-2361	-2428
    2720	2707	2562	2860	2663	2776	2811	2697	2714	2810	2829	2916	2652	2633	2662	2691	2798	3015	2575	2657	2485	2764	2802	2534	2582	2728	2599	2639	2813	2806	2689	2828
    2150	2206	2131	2155	2000	2186	2243	2077	2022	2056	1994	2138	2105	2038	2114	2230	2240	2213	2051	2175	2104	2074	2079	2289	2278	2049	2315	2197	2201	2283	2231	2254
    -2955	-2987	-2812	-3104	-2958	-3024	-3072	-2935	-2967	-3090	-3107	-3194	-2917	-2882	-2906	-2887	-2993	-3203	-2890	-2890	-2806	-3031	-3071	-2807	-2788	-2932	-2833	-2893	-3024	-3009	-2825	-3003
    -2385	-2483	-2379	-2396	-2293	-2434	-2500	-2313	-2277	-2335	-2271	-2416	-2367	-2285	-2353	-2424	-2435	-2400	-2363	-2406	-2424	-2334	-2344	-2561	-2484	-2252	-2548	-2449	-2413	-2486	-2364	-2432
    2720	2714	2572	2866	2668	2777	2814	2701	2713	2812	2830	2919	2656	2636	2666	2696	2800	3016	2579	2658	2485	2769	2807	2537	2588	2734	2602	2641	2815	2806	2695	2827
    2150	2206	2136	2157	2000	2188	2240	2078	2023	2056	1992	2141	2105	2037	2111	2231	2245	2214	2053	2178	2105	2070	2077	2292	2287	2054	2316	2198	2207	2289	2232	2262
    -2956	-2993	-2818	-3108	-2965	-3026	-3073	-2938	-2969	-3091	-3109	-3198	-2920	-2885	-2908	-2891	-2995	-3207	-2890	-2890	-2803	-3036	-3071	-2809	-2790	-2938	-2832	-2893	-3026	-3010	-2827	-3002
    -2385	-2483	-2381	-2399	-2295	-2438	-2498	-2313	-2277	-2337	-2271	-2417	-2367	-2284	-2352	-2427	-2438	-2405	-2365	-2410	-2424	-2336	-2341	-2562	-2489	-2258	-2548	-2450	-2417	-2494	-2363	-2440
    2721	2721	2574	2869	2671	2780	2814	2703	2715	2815	2831	2923	2659	2640	2665	2700	2804	3019	2579	2659	2482	2773	2806	2539	2592	2741	2602	2639	2818	2809	2698	2827
    2152	2208	2139	2160	2005	2191	2242	2077	2025	2060	1993	2141	2109	2036	2113	2236	2247	2218	2058	2181	2109	2072	2077	2291	2294	2062	2320	2201	2209	2295	2234	2269
    -2953	-2997	-2816	-3110	-2962	-3028	-3073	-2938	-2968	-3093	-3107	-3199	-2920	-2886	-2904	-2893	-3000	-3207	-2893	-2888	-2801	-3035	-3071	-2807	-2795	-2942	-2835	-2887	-3032	-3007	-2830	-2999
    -2388	-2483	-2383	-2401	-2300	-2442	-2503	-2315	-2281	-2341	-2273	-2418	-2373	-2284	-2356	-2432	-2442	-2411	-2372	-2413	-2430	-2337	-2342	-2561	-2496	-2265	-2552	-2456	-2418	-2499	-2367	-2447
    2719	2722	2570	2869	2670	2782	2815	2699	2715	2814	2829	2925	2658	2638	2662	2699	2809	3023	2580	2657	2481	2772	2805	2538	2594	2743	2603	2635	2823	2807	2698	2827
    2151	2206	2138	2161	2008	2197	2244	2080	2027	2065	1994	2141	2109	2039	2116	2239	2249	2224	2062	2185	2110	2075	2077	2291	2296	2067	2320	2206	2207	2299	2234	2273
    -2952	-2999	-2812	-3111	-2963	-3032	-3076	-2934	-2970	-3092	-3107	-3205	-2919	-2886	-2903	-2893	-3003	-3210	-2891	-2886	-2800	-3035	-3071	-2809	-2792	-2941	-2835	-2887	-3035	-3006	-2829	-3003
    -2388	-2481	-2382	-2402	-2304	-2443	-2505	-2316	-2283	-2345	-2275	-2416	-2372	-2288	-2357	-2432	-2443	-2413	-2377	-2415	-2430	-2338	-2343	-2560	-2496	-2268	-2552	-2459	-2418	-2501	-2367	-2449
    2716	2722	2563	2870	2668	2785	2815	2696	2712	2813	2829	2930	2654	2637	2660	2700	2813	3020	2579	2653	2480	2768	2805	2537	2590	2737	2604	2633	2826	2802	2697	2830
    2154	2202	2134	2160	2009	2195	2246	2081	2028	2067	1998	2136	2106	2038	2116	2237	2249	2223	2065	2183	2109	2071	2076	2287	2291	2066	2318	2205	2207	2299	2234	2272
    -2950	-2996	-2804	-3109	-2958	-3032	-3072	-2931	-2968	-3091	-3108	-3206	-2914	-2884	-2901	-2890	-3006	-3209	-2889	-2883	-2799	-3029	-3073	-2807	-2789	-2934	-2834	-2887	-3035	-3002	-2829	-3008
    -2390	-2478	-2377	-2400	-2300	-2441	-2504	-2317	-2281	-2347	-2277	-2410	-2365	-2286	-2355	-2428	-2438	-2411	-2375	-2415	-2426	-2337	-2339	-2559	-2488	-2267	-2546	-2457	-2415	-2502	-2363	-2445
    2716	2716	2554	2868	2662	2784	2813	2692	2712	2810	2832	2929	2649	2636	2660	2694	2813	3020	2577	2652	2478	2763	2806	2535	2584	2731	2600	2635	2824	2803	2697	2834
    2158	2202	2130	2159	2005	2194	2246	2080	2026	2067	1998	2131	2100	2037	2113	2232	2243	2220	2063	2183	2106	2073	2073	2287	2286	2064	2313	2202	2204	2298	2230	2268
    -2950	-2993	-2795	-3109	-2951	-3033	-3067	-2927	-2965	-3089	-3108	-3204	-2909	-2883	-2898	-2888	-3009	-3206	-2887	-2883	-2799	-3025	-3071	-2806	-2786	-2930	-2831	-2888	-3036	-3006	-2829	-3010
    -2394	-2479	-2375	-2399	-2298	-2442	-2506	-2314	-2278	-2346	-2272	-2403	-2360	-2283	-2353	-2422	-2433	-2404	-2373	-2413	-2424	-2336	-2337	-2555	-2485	-2261	-2544	-2453	-2413	-2498	-2359	-2439
    2718	2716	2552	2868	2658	2784	2810	2691	2713	2811	2829	2927	2649	2636	2659	2692	2816	3015	2575	2655	2481	2759	2806	2536	2585	2729	2597	2636	2825	2808	2699	2836
    2161	2204	2129	2159	2000	2197	2246	2079	2021	2066	1990	2126	2094	2035	2110	2226	2236	2214	2058	2180	2104	2075	2071	2285	2284	2058	2313	2200	2201	2296	2227	2262
    -2956	-2992	-2799	-3110	-2951	-3033	-3071	-2928	-2969	-3092	-3107	-3201	-2912	-2882	-2901	-2886	-3007	-3202	-2884	-2889	-2800	-3026	-3069	-2809	-2783	-2930	-2824	-2890	-3032	-3013	-2829	-3011
    -2396	-2481	-2374	-2400	-2295	-2445	-2508	-2313	-2275	-2343	-2267	-2402	-2357	-2283	-2350	-2419	-2427	-2402	-2368	-2408	-2422	-2338	-2337	-2555	-2484	-2257	-2543	-2452	-2409	-2496	-2356	-2437
    2726	2716	2556	2871	2660	2786	2813	2693	2715	2815	2824	2923	2651	2635	2662	2692	2816	3013	2573	2661	2486	2763	2808	2540	2584	2730	2594	2640	2823	2813	2700	2834
    2160	2207	2129	2160	2003	2198	2248	2076	2018	2063	1989	2128	2098	2036	2107	2227	2235	2213	2057	2174	2105	2076	2075	2284	2286	2055	2315	2198	2200	2291	2226	2262
    -2962	-2992	-2804	-3113	-2952	-3033	-3074	-2932	-2970	-3096	-3099	-3198	-2913	-2879	-2902	-2885	-3009	-3200	-2885	-2891	-2809	-3031	-3073	-2814	-2787	-2933	-2828	-2895	-3032	-3019	-2833	-3010
    -2394	-2483	-2374	-2402	-2298	-2447	-2508	-2310	-2275	-2339	-2269	-2405	-2365	-2284	-2349	-2421	-2429	-2404	-2369	-2405	-2424	-2342	-2343	-2556	-2490	-2254	-2549	-2452	-2410	-2495	-2361	-2441
    2730	2714	2563	2873	2663	2784	2819	2696	2718	2817	2821	2921	2653	2631	2661	2691	2815	3014	2572	2660	2491	2770	2807	2547	2586	2737	2596	2643	2820	2819	2702	2835
    2158	2209	2128	2164	2005	2201	2249	2073	2019	2061	1996	2135	2107	2037	2106	2231	2237	2219	2058	2174	2103	2079	2080	2288	2291	2052	2318	2201	2201	2294	2230	2271
    -2960	-2990	-2807	-3113	-2956	-3031	-3077	-2934	-2973	-3096	-3098	-3199	-2915	-2881	-2900	-2886	-3007	-3203	-2884	-2889	-2812	-3036	-3073	-2821	-2788	-2938	-2829	-2897	-3030	-3021	-2834	-3008
    -2394	-2485	-2373	-2404	-2299	-2449	-2508	-2309	-2278	-2340	-2279	-2414	-2374	-2285	-2350	-2427	-2433	-2407	-2369	-2405	-2423	-2344	-2349	-2561	-2499	-2251	-2551	-2456	-2414	-2497	-2364	-2447
    2724	2714	2564	2869	2665	2781	2819	2698	2719	2813	2823	2924	2654	2632	2659	2693	2813	3015	2571	2656	2492	2771	2808	2550	2587	2736	2597	2643	2817	2818	2702	2833
    2160	2208	2129	2167	2005	2203	2248	2075	2023	2061	2003	2140	2114	2038	2110	2235	2243	2221	2059	2176	2103	2080	2084	2292	2298	2052	2319	2206	2205	2296	2235	2275
    -2956	-2989	-2807	-3107	-2955	-3027	-3075	-2935	-2972	-3092	-3101	-3200	-2916	-2881	-2898	-2886	-3001	-3206	-2880	-2885	-2809	-3036	-3072	-2821	-2787	-2935	-2828	-2894	-3026	-3020	-2833	-3009
    -2399	-2485	-2377	-2410	-2297	-2452	-2506	-2310	-2281	-2340	-2284	-2418	-2378	-2287	-2354	-2427	-2435	-2411	-2370	-2409	-2423	-2345	-2349	-2566	-2500	-2255	-2550	-2461	-2414	-2499	-2366	-2448
    2723	2711	2560	2861	2660	2776	2815	2698	2718	2810	2826	2922	2657	2631	2656	2691	2808	3019	2567	2653	2489	2770	2805	2551	2584	2734	2597	2643	2816	2818	2702	2833
    2165	2209	2132	2169	2005	2204	2247	2076	2026	2062	2005	2143	2115	2040	2114	2234	2244	2225	2064	2181	2107	2082	2083	2295	2302	2059	2322	2212	2205	2296	2239	2271
    -2957	-2988	-2803	-3102	-2951	-3022	-3070	-2936	-2970	-3089	-3106	-3199	-2919	-2880	-2897	-2885	-2999	-3206	-2878	-2883	-2805	-3033	-3071	-2820	-2784	-2934	-2830	-2893	-3026	-3016	-2834	-3007
    -2402	-2485	-2381	-2410	-2300	-2451	-2507	-2311	-2284	-2341	-2282	-2418	-2376	-2289	-2357	-2427	-2437	-2412	-2377	-2411	-2426	-2345	-2347	-2564	-2499	-2260	-2554	-2462	-2417	-2496	-2371	-2442
    2724	2712	2559	2861	2656	2775	2807	2700	2715	2807	2831	2922	2657	2633	2657	2691	2805	3020	2566	2654	2485	2768	2803	2547	2581	2733	2601	2640	2816	2810	2702	2830
    2165	2207	2135	2167	2006	2203	2248	2076	2028	2060	2002	2141	2111	2044	2116	2234	2242	2227	2068	2183	2107	2083	2077	2293	2296	2063	2319	2212	2206	2297	2240	2265
    -2958	-2990	-2802	-3102	-2946	-3023	-3065	-2938	-2967	-3085	-3106	-3200	-2917	-2882	-2898	-2888	-2996	-3207	-2877	-2887	-2799	-3031	-3063	-2815	-2776	-2934	-2833	-2892	-3023	-3009	-2831	-3003
    -2400	-2481	-2380	-2403	-2301	-2448	-2510	-2307	-2284	-2338	-2279	-2415	-2371	-2291	-2356	-2428	-2434	-2414	-2380	-2411	-2429	-2348	-2339	-2562	-2496	-2262	-2551	-2463	-2416	-2499	-2374	-2438
    2723	2713	2557	2860	2655	2774	2805	2700	2711	2802	2829	2923	2655	2633	2658	2694	2806	3019	2571	2657	2484	2767	2798	2540	2576	2734	2606	2641	2816	2806	2701	2828
    2163	2205	2132	2160	2008	2199	2249	2071	2028	2058	2000	2139	2106	2043	2114	2233	2240	2225	2068	2177	2108	2082	2070	2287	2294	2060	2316	2210	2204	2296	2243	2261
    -2956	-2989	-2800	-3102	-2948	-3024	-3066	-2938	-2965	-3081	-3104	-3199	-2915	-2884	-2899	-2891	-2999	-3208	-2886	-2890	-2805	-3030	-3063	-2809	-2776	-2934	-2838	-2894	-3029	-3007	-2834	-3002
    -2395	-2478	-2377	-2398	-2300	-2445	-2510	-2303	-2282	-2336	-2276	-2413	-2367	-2289	-2356	-2425	-2431	-2413	-2378	-2406	-2425	-2345	-2334	-2556	-2495	-2258	-2549	-2461	-2415	-2497	-2374	-2435
    2722	2713	2555	2860	2657	2777	2810	2701	2710	2800	2827	2922	2653	2638	2658	2698	2806	3020	2575	2660	2487	2766	2795	2536	2576	2736	2605	2644	2817	2805	2700	2829
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  • Hi  ,

    CONVST Freq: 108KHz
    Input Frequency: 27KHz

    this looks familiar... Is this still the problem you had back in december?

    I guess you still don't hit the extrema of your sine wave, but looking at your data dump your sampling frequency now seem to be synchronized with your input frequency, and you are constantly hitting the same points of your input sine wave, like in the second picture in the other thread.

    So, what can you do? You can either rise your sampling frequency or lower your input frequency, so you get more samples per period. Remember, the AD7606C can do up to 1 Msps, so you have a lot of room left. If both frequencies are fixed and you have to get the peak voltages, then you can play around with the System Phase Calibration of the AD7606C, to shift around the sampling point, until you hit the maximum. Or you do the math, and reconstruct your sine wave from your samples.

    Regards,

    rehfi

  • Hi Rehfi,

    Thanks for your reply, actually I want to calculate the voltage from these samples. Could you suggest to me on this?
     
    " I am doubting what should I consider the value of Full Scale Range in the calculation formula."


    Please Note: I haven't made any configuration changes for the ADC IC. "

    I attempted to perform calculations using a full scale of 40V (for diff.) for the default configuration RANGE_CHx_CHx register (i.e., single-ended for +/-10V). However, I am observing a discrepancy of approximately 1.5V between the input I am giving to the ADC and the digital data output I am receiving from the ADC.

    At some points, the samples are hitting Min/Max. so for comparison, I am taking the min. & max. of these samples for a particular channel.

  • Hi  ,

    If you want to stick to the Min/Max method, you should get more samples per period, i.e. by raising you sampling frequency.

    If you want to do the math, FFT comes to mind, or something like this.

    When you are not sure how to correctly calculate voltages from your ADC readings, then remember: RANGE_CHx_CHx register default is 0x3, which is the ±10 V single-ended range. Look up the LSB value in Table 11, which is 305.2 µV for this range. With the first sample of your data dump we then get -2379 x 305.2 µV = -0,73 V. With the next value we get 2730 x 305.2 µV = 0,83 V. Together this would be 1,56 Vp-p, but remember that you most likely didn't hit the maximum.

    You should also consider to use a range more fitting to you signal, like the ±2.5 V range.

    Regards,

    rehfi

  • Hi Rehfi, 
    I have a doubt

    When measuring my ADC input at V1+ wrt GND I am observing ~1.4Vpp, similarly, at V1- wrt GND I am observing ~1.4Vpp. So, Input to ADC will be ~2.8Vpp.

    But, while capturing from ADC (Digital Data, as you said) ~1.56Vpp is calculated.

    I used the same formula of multiplying the digital data with 305.2 µV & took the min/max (assumed not hitting the max), I m observing ~1.74Vpp (less than 2.8Vpp)

    Why is this variation we are observing? How is the data captured inside ADC? Isn't ADC measuring inputs as (V1+) - (V1-)?
    Are we missing any configuration needs to be done?




     

  • Hi  ,

    I'm not sure how you think the ADC works. It takes discrete samples out of your input signal, it doesn't continuously scan the inputs (or even scans for the minimum and maximum inputs). Is' not like a mutlimeter that gives you a RMS value for an AC-voltage, or an oscilloscope (which, on the other hand, does exactly the same as the ADC, but way more faster. A really lot faster).

    I took some samples out of your dump, threw them into excel, and tried to fit a sine wave over it:

    The blue line are your samples, if the line is zero, no sample is taken. The orange line is my guess what you input signal is. The pattern repeats over the whole dump. You can clearly see that when the input sine wave has its maximum, you don't take a sample. You take your samples "at the wrong time".

    Above I already gave some advises how to tackle this problem. The easiest one is the lower the frequency of your input signal. Try it with 1 kHz and take a look at your samples, just to get a feeling how it works.

    Regards,

    rehfi

Reply
  • Hi  ,

    I'm not sure how you think the ADC works. It takes discrete samples out of your input signal, it doesn't continuously scan the inputs (or even scans for the minimum and maximum inputs). Is' not like a mutlimeter that gives you a RMS value for an AC-voltage, or an oscilloscope (which, on the other hand, does exactly the same as the ADC, but way more faster. A really lot faster).

    I took some samples out of your dump, threw them into excel, and tried to fit a sine wave over it:

    The blue line are your samples, if the line is zero, no sample is taken. The orange line is my guess what you input signal is. The pattern repeats over the whole dump. You can clearly see that when the input sine wave has its maximum, you don't take a sample. You take your samples "at the wrong time".

    Above I already gave some advises how to tackle this problem. The easiest one is the lower the frequency of your input signal. Try it with 1 kHz and take a look at your samples, just to get a feeling how it works.

    Regards,

    rehfi

Children
  • Hi Rehfi,

    We are using FFT now for calculating the ADC Output Vpp.

    Below is the observation

    1. Input Amp. 1Vpp @ 270Hz.
    Output Amp. of ADC plotted in GUI 1.757Vpp
    Expected O/P : 2Vpp

    The observed data amplitude is nearly matching.



    2. Input Amp. 2Vpp @ 27KHz.
    Output Amp. of ADC plotted in GUI 2.37Vpp
    Expected O/P : 4Vpp

    The observed data amplitude is nearly half.



    HSDC FFT Plot


    Can you comment on this why is this variation we are observing at higher freq.? 

    Note: Full scale as 20Vpp here.

  • When you take the minimum and maximum from a set of samples and use that to calculate the amplitude of your input signal, then you have to oversample a lot, or it will not reliably work. You see that in 1), you oversample a lot, and you get better results.

    You have to be aware that this method is also highly susceptible to noise. One noisy sample can ruin your whole measurement when its the maximum value.

    When you want to get an amplitude from just a couple of samples, you have to put in more effort, and do some math, or you will run into the same problem over and over again. The FFT was just an idea, not a solution. I can't help you with that, maybe somebody else chimes in.

    Good luck!

    rehfi