OPA124 Datasheet, PDF (4/8 Pages) Burr-Brown (TI) – Low Noise Precision Difet OPERATIONAL AMPLIFIER

TYPICAL PERFORMANCE CURVES
At T_A = +25°C, and V_CC = ±15VDC, unless otherwise noted.
INPUT CURRENT NOISE SPECTRAL DENSITY
100
INPUT VOLTAGE NOISE SPECTRAL DENSITY
1k
10
1
PB
0.1
1
10
100
1k
10k 100k 1M
Frequency (Hz)
100
U, P
10
PB
1
1
10
100
1k
10k
100k
1M
Frequency (Hz)
TOTAL⁽¹⁾ INPUT VOLTAGE NOISE SPECTRAL
DENSITY vs SOURCE RESISTANCE
1k
R_S = 10MΩ
R_S = 1MΩ
100
R_S = 100kΩ
PB
10
NOTE: (1) Includes contribution
from source resistance.
R_S = 100 Ω
1
0.1
1
10
100
1k
10k 100k
Frequency (Hz)
VOLTAGE AND CURRENT NOISE SPECTRAL
DENSITY vs TEMPERATURE
12
100
f_O = 1kHz
10
10
8
1
6
0.1
4
–50 –25
0.01
0
25
50
75 100 125
Temperature (°C)
TOTAL⁽¹⁾ INPUT VOLTAGE NOISE (PEAK-TO-PEAK)
vs SOURCE RESISTANCE
1k
NOTE: (1) Includes contribution
from source resistance.
100
PB
10
f_B = 0.1Hz to 10Hz
1
10 ⁴
10 ⁵
10 ⁶
10 ⁷
10 ⁸
10 ⁹
10 ¹⁰
Source Resistance (Ω)
TOTAL INPUT VOLTAGE NOISE SPECTRAL DENSITY
AT 1kHz vs SOURCE RESISTANCE
1k
E_O
100
R_S
OPA124PB +
Resistor
10
1
100
Resistor Noise Only
1k
10k
100k
1M
Source Resistance (Ω)
10M 100M
®
OPA124
4