Datasheet

OPA131, 2131, 4131
4
SBOS040A
www.ti.com
TYPICAL CHARACTERISTICS
At T
A
= +25°C, V
S
= ±15V, and R
L
= 2kΩ, unless otherwise noted.
POWER SUPPLY AND COMMON-MODE REJECTION
vs FREQUENCY
Frequency (Hz)
Power Supply Rejection (dB)
120
100
80
60
40
20
0
Common-Mode Rejection (dB)
120
100
80
60
40
20
0
10 100 1k 10k 100k 1M
CMR
+PSR
–PSR
CHANNEL SEPARATION vs FREQUENCY
Frequency (Hz)
Channel Separation (dB)
160
140
120
100
80
10 100 1k 10k 100k
Dual and quad devices.
G = 1, all channels.
Quad measured channel
A to D or B to C—other
combinations yield improved
rejection.
R
L
= ∞
R
L
= 2kΩ
OPEN-LOOP GAIN/PHASE vs FREQUENCY
1
120
100
80
60
40
20
0
–20
Voltage Gain (dB)
0
–45
–90
–135
–180
Phase Shift (°)
Frequency (Hz)
10 100 1k 10k 100k 1M 10M
∅
G
INPUT BIAS AND INPUT OFFSET CURRENT
vs TEMPERATURE
Ambient Temperature (°C)
Input Bias and Input Offset Current (pA)
10k
1k
100
10
1
0.1
0.01
–75 –50 –25 0 25 50 75 100 125
I
B
I
OS
V
CM
= 0V
INPUT BIAS CURRENT
vs INPUT COMMON-MODE VOLTAGE
Common-Mode Voltage (V)
Input Bias Current (pA)
1k
100
10
1
–15 –10 –50 51015
Input bias current is a
function of the voltage
between the V– supply
and the inputs.
V
S
= ±15V
V
S
= ±5V
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
1
1k
100
10
Voltage Noise (nV/√Hz)
Frequency (Hz)
10 100 1k 10k 100k 1M
1
1k
100
10
Current Noise (fA/√Hz)
1
Voltage Noise
Current Noise