National Instruments SCC-SG Series, Руководство пользователя

Страница: 47 / 52

© National Instruments Corporation 47 SCC-SG Series Strain-Gauge Modules User Guide
Amplifier Characteristics
Common-mode rejection ratio
(CMRR) ................................................. 110 dB min
Output range
........................................... ±
10 VDC max
Input impedance
Common mode................................ 5 M
Ω
Differential...................................... 20 M
Ω
Powered off or overload ................. >60 k
Ω
Input bias current
............................ ±
10 nA max
Input offset current
.......................... ±
10 nA max
Dynamic
Input noise, 0.1 to 10 Hz ........................ 0.4
µ
V
rms
, 2.5
µ
V pp
Input noise.............................................. 3
µ
V
rms
, 25
µ
V pp
Stability
Recommended warm-up time ................ 5 minutes
Gain drift ................................................ 10 ppm/
°
C max
1
Offset-error temperature coefficient ...... 4
µ
V/
°
C max
1
Null Compensation
Range
..................................................... ±
0.29% of excitation range,
or
±
29 mV
2,900
µε
null compensation range
where
V
OUT
is the output voltage range of 58 mV.
V
EX
is the excitation voltage of 10 VDC.
G
F
is 2.0.
1
Temperature range is 0 to 50 °C.
ε
∆
V
OUT
V
EX
G
F
----------------
2 900
µε ,
= =