Datasheet

4
®
OPA137, 2137, 4137
TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, V
S
= ±15V, R
L
= 10kΩ, connected to ground, unless otherwise noted.
CHANNEL SEPARATION vs FREQUENCY
Frequency (Hz)
Channel Separation (dB)
140
120
100
80
60
40
20
100 1k 10k 100k 1M
Dual and quad devices.
G = 1, all channels.
Quad measured channel
A to D or B to C—other
combinations yield improved
rejection.
INPUT BIAS CURRENT
vs INPUT COMMON-MODE VOLTAGE
Common-Mode Voltage (V)
Input Bias Current (pA)
1n
100p
10p
1p
–15 –10 –5 0 5 10 15
Input bias current is a
function of the voltage
between the V– supply
and the inputs.
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
0.1
1k
100
10
1
1
10
1
0.1
Frequency (Hz)
1 10 100 1k 10k 100k 1M
Voltage Noise (nV/√Hz)
Current Noise (fA/√Hz)
Current Noise
Voltage Noise
POWER SUPPLY AND COMMON-MODE REJECTION
vs FREQUENCY
Frequency (Hz)
PSRR, CMRR (dB)
100
80
60
40
20
0
10 100 1k 10k 100k 1M
CMRR
–PSRR
+PSRR
OPEN-LOOP GAIN/PHASE vs FREQUENCY
1 10 100 1k 10k 100k 1M 10M
100
80
60
40
20
0
–20
0
–45
–90
–135
–180
Gain (dB)
Phase Shift (°)
Frequency (Hz)
G
φ
–40°C
+85°C
+25°C
INPUT BIAS CURRENT vs TEMPERATURE
Temperature (°C)
Input Bias Current (pA)
10k
1k
100
10
1
0.1
–75 –50 –25 0 25 50 75 100 125