I found ADG1207 suitable for my application. In order to verify the functionality of the entire DAS I need the spice model for the part ADG1207.
Please provide the same..
The ADG407 is an older part and it looks like the off isolation plot was made with some measurements that were then extrapolated for the plot. The ADG1207 off isolation was measured on a network analyzer and so full measurement data is available…
ABOUT THE HARDWARE IN BRIEF
I have designed a fully universal 8 channel differential Analog Input Module (Thermocouple,RTD,mA,0-10VDC). All the channels are non-isolated. At the input of each channel there is a common-mode(cut-off = 1kHz)and differential…
Muxes like the ADG1407 have to use larger devices to get the low R_on. Therefore they end up with higher capacitance. In-amps like the AD8253 or AD8221 have very high input resistance, so the on-resistance of the mux in series with the in-amp…
A couple of things to consider....
-- Every year ADC prices come down, so I would consider using three ADCs or more. Although the ADG1207 is a low capacitance mux, it still has finite on resistance and capacitance. To get to 16 bits of accuracy…
I am working on differential Multi-channel high precision DAS. I have chosen the following architectures.
Spec: CMRR - >=50dB @ 0 to 1Khz
Gain Error - 0.02%
AAF --> MUX --> IA --> Post amplifiers --> ADC
I am on the verge of completion of an 8-channel analog input module design. Each channel can measure RTD Pt-100, Thermocouple (J,K,R,S,T,B,N),0-10VDC and 0-20mA input types. A 24VDC external supply can power this module. I have used an…
I am designing a multi-channel DAS. The specificatios or as given below;
Total channels : 24
Analog input signal range : +/- 10V
Resolution of ADC : 16 bit
Gain error : <= 0.02% of FSR i.e <=4mV
Offset voltage : +/-1.2mV