Adc Input Operation Voltage Range - L-Card L-502-P-G-D-I User Manual

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4.4. ADC input operation voltage range

Note that in the differential mode on the subbands ± 10, ± 5 V, the L-502 has unbalanced
input signal ranges of the inputs X and Y with regard to the analog ground circuit AGND, and in the
"common ground" mode, the L-502 on the same subbands has asymmetric input signal ranges of the
inputs X (Y) and GND32 with regard to the AGND circuit.
Режим "с общей землёй"
Mode "with common ground"
Измеряемое напряжение
Measured voltage
от ±0,2 В до ±10 В в зависимости от
from ±0.2 V to ±10 V, depending
установленного поддиапазона
from the set subband
Постоянное
Constant or alternating offset voltage
напряжение
GND32 in the range of ± 1 V.
диапазоне ±1 В.
Режим "дифференциальный" ±10 В или ±5 В
Differential mode ±10 V or ±5 V
Измеряемое напряжение
Measured voltage
в зависимости
on the set subband
поддиапазона
Постоянное или переменное напряжение
Constant or alternating offset voltage U y; in
смещения
the range of ± 1 V relative to GND.
относительно GND.
Режим "дифференциальный" ±2, ±1, ±0,5 или ±0,2 В
Differential mode ±2, ±1, ±0,5 or ±0,2 V
Измеряемое напряжение
Measured voltage
±0,5 или ±0,2 В в зависимости от
± 0.5 or ± 0.2 V depending on the set
установленного поддиапазона
subband
Постоянное
Constant or alternating common-mode
синфазное напряжение (Uxi +Uyi )/2
voltage (Uxi + Uyi)/2 in the range ±1
в диапазоне ±1 В.
V.
The figure below shows examples of connecting voltage sources (VS) to the ADC inputs.
Z, Z1, Z2 - the intrinsic resistances of the wires (through which the through currents can flow
with the connection of different devices) or other external electrical causes inducing the parasitic
offset voltage U , U
Yi
exceed ± 1 V in order to ensure the operating mode, and in the latter scheme the common mode
voltage (U +U )/2 must be within ± 1 V.
Xi Yi
или переменное
смещения
GND32
±10 В или ±5 В
±10 V or ±5 V, depending
от установленного
в диапазоне ±1 В
U
Yi
±2, ±1,
±2, ±1,
или переменное
.U are indicated. In the first two circuits, the voltage U
Yj GND
-
U U
GND32
Xi(Yi)
U
в
GND32
-
U
Xi
U
Yi
-
U U
Xi Yi
U
U
Yi
Connection of signals.
L-502
X (Y )
i
i
GND32
GND
X i L-502
U
Yi
Y i
GND
L-502
X i
Y i
Xi
GND
, U
Yi
should not
Yj