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...
Datasheet
AD5940 on Analog.com
Hi, I am wondering if this is the appropriate way of connecting resistors to the eval board when trying to test measurements. I have a differnt version of the board so i am unable to reference previous examples. Please could you confirm?

Would really appreciate your help
Hi brady1 ,
Apologies for the late response. I will contact the product owner and get back to you.
Thanks,
Francis
Yes, you may connect resistor load like above.
Hi, thanks for getting back to me. I did and the result are not making sense so fat. here is what I see on the debug terminal -- this is a 1000 ohm resistor and I am measuring in 2 wire configuration. Any guidance would be helpful
THIS DATA DOESNT LOOK RIGHT (USING A 10K RTIA, MEASUIRNG A 1K RES)
app_timer: RTC: initialized.
app: SoftDevice wants RAM start: 0x200024D0
app: AD5940 ADIID: 0x4144 (expected 0x4144)
app: AD5940 SPI OK
app: RTIA Cal Real: 11108.86 Imag: -121.49
app: BioZ BLE app started
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app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): 2891.13 Imag: 1909.53
app: Real(ohm): -1036.11 Imag: 1424.33
app: Real(ohm): -1037.00 Imag: 1425.14
app: Real(ohm): -1032.67 Imag: 1420.82
app: DataCount: 5
app: Freq: 10000.00
app: Real(ohm): -1085.55 Imag: 1655.03
app: Real(ohm): -1033.22 Imag: 1421.83
app: Real(ohm): -1039.78 Imag: 1425.60
app: Real(ohm): -1033.42 Imag: 1420.09
app: Real(ohm): -1036.94 Imag: 1425.54
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): 2885.78 Imag: 1908.08
app: Real(ohm): -1036.20 Imag: 1424.27
app: Real(ohm): -1034.52 Imag: 1422.53
app: Real(ohm): -1031.77 Imag: 1419.75
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): 2880.11 Imag: 1911.20
app: Real(ohm): -1037.76 Imag: 1423.59
app: Real(ohm): -1033.96 Imag: 1421.22
app: Real(ohm): -1032.16 Imag: 1420.95
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): -1085.12 Imag: 1656.19
app: Real(ohm): -1032.85 Imag: 1421.19
app: Real(ohm): -1043.82 Imag: 1426.87
app: Real(ohm): -1039.21 Imag: 1424.57
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): -1089.31 Imag: 1659.30
app: Real(ohm): -1036.58 Imag: 1423.50
app: Real(ohm): -1033.42 Imag: 1422.40
app: Real(ohm): -1037.89 Imag: 1423.24
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): 2888.49 Imag: 1910.89
app: Real(ohm): -1038.23 Imag: 1423.98
app: Real(ohm): -1037.40 Imag: 1424.33
app: Real(ohm): -1036.27 Imag: 1423.60
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): 2883.78 Imag: 1906.21
app: Real(ohm): -1036.84 Imag: 1421.80
app: Real(ohm): -1041.55 Imag: 1426.76
app: Real(ohm): -1038.14 Imag: 1423.46
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): -1084.40 Imag: 1658.16
app: Real(ohm): -1042.11 Imag: 1427.11
app: Real(ohm): -1038.38 Imag: 1423.86
app: Real(ohm): -1036.02 Imag: 1422.28
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): -1091.72 Imag: 1659.05
app: Real(ohm): -1039.37 Imag: 1425.19
app: Real(ohm): -1036.62 Imag: 1422.84
app: Real(ohm): -1038.32 Imag: 1424.73
app: DataCount: 4
app: Freq: 10000.00
app: Real(ohm): 2884.55 Imag: 1906.88
app: Real(ohm): -1034.67 Imag: 1419.81
app: Real(ohm): -1035.41 Imag: 1422.14
app: Real(ohm): -1033.71 Imag: 1419.93