L-Card ADC Series User Manual page 60

6.1.7.3. Differential mode, offset potential
due to current source in regard to AGND
I R
Uсм
Fixed ADC ± U measurement subband must correspond to U=I
a voltage margin of, at least, U. Resistor R should always be located close to the ADC input. Resistors R,
R1, R2 must be less than 50 Ω in multichannel mode at the maximum switching frequency. |Ucm| ≤ 1 В
X1 (Y2 -Y16)
E-502
Y1 (X2-X16)
AGND
6.1.7.4. Differential mode, isolated
current source
I
R = R1 + R2
Only for E-502 voltage subbands: ±2 V, ±1 V,
±0.5 V, ±0.2 V
*R, while the current source must have
MAX
X1 (X2 -X16)
R1
AGND
E-502
R2
Y1 (Y2 -Y16)