Datasheet

®
OPA21115
TYPICAL PERFORMANCE CURVES (CONT)
T
A
= +25°C, and V
CC
= ±15VDC unless otherwise noted.
TOTAL
(1)
INPUT VOLTAGE NOISE SPECTRAL
DENSITY vs SOURCE RESISTANCE
100
Frequency (Hz)
1k 10k 100k1010.1
1k
100
10
Voltage Noise (nV/ Hz)
BM
NOTE: (1) Includes contribution
from source resistance.
1
R
S
= 10MΩ
R
S
= 1MΩ
R
S
= 100kΩ
R
S
= 100Ω
INPUT OFFSET VOLTAGE WARM-UP DRIFT
40
20
0
–20
Time From Power Turn-On (Minutes)
Offset Voltage Change (µV)
0 123456
–40
INPUT VOLTAGE NOISE SPECTRAL DENSITY
1k
Frequency (Hz)
10k 100k 1M100101
1k
100
10
Voltage Noise (nV/ Hz)
BM
AM, SM
1
BIAS AND OFFSET CURRENT 
vs TEMPERATURE
–50
Ambient Temperature (°C)
–25
0 25 50 75 100 125
1k
100
10
1
0.1
Bias Current (pA)
1k
100
10
1
0.1
Offset Current (pA)
0.01 0.01
TOTAL
(1)
INPUT VOLTAGE NOISE (PEAK-TO-PEAK)
vs SOURCE RESISTANCE
10
1k
100
10
Voltage Noise (µVp-p)
NOTE: (1) Includes contribution
from source resistance.
4
Source Resistance (Ω)
10
5
10
6
10
7
10
8
10
9
10
10
1
BM
f
B
= 0.1Hz to 10Hz
POWER SUPPLY REJECTION
vs FREQUENCY
1
Frequency (Hz)
10 100 1k 10k 100k 1M 10M
Power Supply Rejection (dB)
140
120
100
80
60
40
20
0