Analog Input Section
Input type
Analog isolated balanced differential
Input coupling
Single
-
ended positive, single
-
ended negative and differential
Signal input coupling
Coupling modes
AC/DC/GND
AC coupling frequency
1.6 Hz
±
10%;
-
3 dB
-60
-50
-40
-30
-20
-10
0
0.001
0.01
0.1
1
10
100
M
ag
n
it
u
d
e
[d
B
]
1.6 Hz AC coupling response [dB]
0
10
20
30
40
50
60
70
80
90
100
0.001
0.01
0.1
1
10
100
M
ag
n
it
u
d
e
[%
]
Frequency [Hz]
1.6 Hz AC coupling response [%]
Frequency [Hz]
Figure A.205:
Representative AC coupling response
Impedance
2 * 10 MΩ
±
1% // 45 pF
±
10% (Differential)
Ranges
±
1 mV,
±
10 mV,
±
0.1 V,
±
1.0 V,
±
10.0 V
Offset
±
50% in 1000 steps (0.1%). For all ranges except
±
10 V range (20 V span).
Common mode (referred to system ground/earth)
Ranges
Less than or equal to
±
100m V
Larger than or equal to
±
1 V
Rejection (CMR)
> 100 dB @ 80 Hz (105 dB typical)
> 80 dB @ 80 Hz (95 dB typical)
Maximum common mode voltage
7 V RMS
7 V RMS
-120
-100
-80
-60
-40
-20
0
0.01
0.1
1
10
100
M
ag
n
it
u
d
e
[d
B
]
Frequency [kHz]
Common mode response
≤ ±
100 mV ranges
≥ ± 1 V ranges
Figure A.206:
Representative common mode response
Input overload protection
Overvoltage impedance change
The activation of the overvoltage protection system results in a reduced input impedance.
The overvoltage protection is not active for as long as the input voltage is between
-
12 V
and +15 V in respect to channel ground.
Maximum nondestructive voltage
±
25 V DC
GEN3i
I3763-3.1 en HBM: public
637
