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ADUCM355 Recommended for New Designs
The ADuCM355 is an on-chip system that controls and measures electrochemical sensors and biosensors. The ADuCM355 is an ultralow power, mixed-signal microcontroller...
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ADUCM355 on Analog.com

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AD5940 Recommended for New Designs
The AD5940 and AD5941 are high precision, low power analog front ends (AFEs) designed for portable applications that require high precision, electrochemical...
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AD5940 on Analog.com

Associated Drivers

Square Wave Voltammetry

Roht

on Jul 15, 2024

Category: Software

Product Number: ADUCM355QSPZ, ADUCM355

Hi, This is Rohit Kumar Sharma. Actually, I am using the SWV technique in the aducm355qspz board. While performing this technique, I am getting only the current response in csv file. How can I get potential w.r.t. current?

Tags: software ADuCM355QSPZ SqrWaveVoltammetry Sensors and MEMS squarewave voltammetry EVAL-ADuCM355QSPZ aducm355 square wave voltammetry Bio-Sensors Precision Microcontrollers ad5940 Electrochemical Sensors Show More

0 Akila

on Jul 23, 2024 4:30 AM
HI,

You may refer to (+) AD5940/AD5941 for portable device - Q&A - Temperature Sensors - EngineerZone (analog.com)

The same code snippet can be used for ADuCM355 as both use the same library file.
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0 Roht
on Jul 24, 2024 2:26 AM in reply to Akila
okay, thankyou
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0 Roht
on Jul 24, 2024 9:12 AM in reply to Roht
I am getting index and current only through realterm. I am not getting potential in square wave voltammetry techniques. please help to solve this problem.
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0 Akila

on Jul 25, 2024 2:14 AM in reply to Roht
Hi,

The ADC mux inputs in SWV example code must be modified to add VCE and VSE voltages as described in link above:

AD5940_ADCMuxCfgS(ADCMUXP_VCE0, ADCMUXN_N_NODE)

in order to measure voltages.
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0 Roht
on Jul 25, 2024 12:23 PM in reply to Akila
Thankyou
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0 Roht
on Sep 12, 2024 3:58 PM in reply to Akila
Hi,

I am using ADUCM355QSPZ.

To measure the voltages in SWV, I have modified SWV code as

AD5940_StructInit(&dsp_cfg, sizeof(dsp_cfg));
dsp_cfg.ADCBaseCfg.ADCMuxN = ADCMUXN_LPTIA0_N;
dsp_cfg.ADCBaseCfg.ADCMuxP = ADCMUXP_LPTIA0_P;
dsp_cfg.ADCBaseCfg.ADCMuxP = ADCMUXP_VSE0;
dsp_cfg.ADCBaseCfg.ADCPga = AppSWVCfg.AdcPgaGain;

But still, I am not able to measure voltages. Is it right, or need to modify something else? Please help.
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0 Akila

on Oct 7, 2024 4:10 AM in reply to Roht
Hi,

I am not sure what your voltage input pins are.

Why is ADCMuxP assigned two times? Only the last assignment gets implemented on device.
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Square Wave Voltammetry