Connection To Adc Input With Up To 16 Differential Voltage Sources - L-Card ADC Series User Manual

6.1.2. Connection to ADC input with up to 16 differential voltage sources

6.1.2.1. General case
6.1.2.2. Differential connection of an
isolated voltage source
The following condition should be met:
(R1 = R2) ≤ 50 Ω, if the switching frequency
is maximal.
R1, R2 should be located close to
E-502 input
Only for voltage subbands:
± 2 V, ± 1 V, ± 0.5 V, ± 0.2 V.
L
Only for voltage subbands:
±2 V, ±1 V, ±0.5 V, ±0.2 V
Only for E-502 voltage subbands: ± 2 V, ± 1 V, ± 0.5 V, ± 0.2 V.
X1 (X2 -X16)
R1
AGND
E-502
R2
Y1 (Y2 -Y16)
Special case: differential connection of the inductive sensor:
X1 (X2 -X16)
R1
AGND
E-502
R2
Y1 (Y2 -Y16)
X1 (X2-X16)
Uвх
E-502
Y1 (Y2 -Y16)
AGND
6.1.2.3. Differential connection of an
isolated voltage source with divider
R3
R4
It is necessary: R1 ≤ 50 Ω, if the switching
frequency is maximal, R1 = R2, R3 = R4..
Locate R1, R2 close to E-502 input.
The voltage transfer ratio is
(R1+R2)/(R1+R2+R3+R4)
Only for voltage subbands:
±2 V, ±1 V, ±0.5 V, ±0.2 V
R3
R4
Only for voltage subbands:
±2 V, ±1 V, ±0.5 V, ±0.2 V
X1 (X2 -X16)
R1
AGND
E-502
R2
Y1 (Y2 -Y16)
X1 (X2 -X16)
R1
AGND
E-502
R2
Y1 (Y2 -Y16)