Datasheet

2
®
INA125
SPECIFICATIONS: V
S
= ±15V
At T
A
= +25°C, V
S
= ±15V, IA common = 0V, V
REF
common = 0V, and R
L
= 10kΩ, unless otherwise noted.
INA125P, U INA125PA, UA
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
INPUT
Offset Voltage, RTI
Initial ±50 ±250 ✻ ±500 µV
vs Temperature ±0.25 ±2 ✻ ±5 µV/°C
vs Power Supply V
S
= ±1.35V to ±18V, G = 4 ±3 ±20 ✻ ±50 µV/V
Long-Term Stability ±0.2 ✻ µV/mo
Impedance, Differential 10
11
|| 2 ✻ Ω || pF
Common-Mode 10
11
|| 9 ✻ Ω || pF
Safe Input Voltage ±40 ✻ V
Input Voltage Range See Text ✻
Common-Mode Rejection V
CM
= –10.7V to +10.2V
G = 4 78 84 72 ✻ dB
G = 10 86 94 80 ✻ dB
G = 100 100 114 90 ✻ dB
G = 500 100 114 90 ✻ dB
BIAS CURRENT V
CM
= 0V 10 25 ✻ 50 nA
vs Temperature ±60 ✻ pA/°C
Offset Current ±0.5 ±2.5 ✻ ±5nA
vs Temperature ±0.5 ✻ pA/°C
NOISE, RTI R
S
= 0Ω
Voltage Noise, f = 10Hz 40 ✻ nV/√Hz
f = 100Hz 38 ✻ nV/√Hz
f = 1kHz 38 ✻ nV/√Hz
f
= 0.1Hz to 10Hz 0.8 ✻ µVp-p
Current Noise, f = 10Hz 170 ✻ fA/√Hz
f
= 1kHz 56 ✻ fA/√Hz
f = 0.1Hz to 10Hz 5 ✻ pAp-p
GAIN
Gain Equation
4 + 60kΩ/R
G
✻ V/V
Range of Gain 4 10,000 ✻✻V/V
Gain Error V
O
= –14V to +13.3V
G = 4 ±0.01 ±0.075 ✻ ±0.1 %
G = 10 ±0.03 ±0.3 ✻ ±0.5 %
G = 100 ±0.05 ±0.5 ✻ ±1%
G = 500 ±0.1 ✻ %
Gain vs Temperature
G = 4 ±1 ±15 ✻✻ppm/°C
G > 4
(1)
±25 ±100 ✻✻ppm/°C
Nonlinearity V
O
= –14V to +13.3V
G = 4 ±0.0004 ±0.002 ✻ ±0.004 % of FS
G = 10 ±0.0004 ±0.002 ✻ ±0.004 % of FS
G = 100 ±0.001 ±0.01 ✻✻% of FS
G = 500 ±0.002 ✻ % of FS
OUTPUT
Voltage: Positive (V+)–1.7 (V+)–0.9 ✻✻ V
Negative (V–)+1 (V–)+0.4 ✻✻ V
Load Capacitance Stability 1000 ✻ pF
Short-Circuit Current –9/+12 ✻ mA
VOLTAGE REFERENCE V
REF
= +2.5V, +5V, +10V
Accuracy I
L
= 0 ±0.15 ±0.5 ✻ ±1%
vs Temperature I
L
= 0 ±18 ±35 ✻ ±100 ppm/°C
vs Power Supply, V+ V+ = (V
REF
+ 1.25V) to +36V ±20 ±50 ✻ ±100 ppm/V
vs Load I
L
= 0 to 5mA 3 75 ✻✻ppm/mA
Dropout Voltage, (V+) – V
REF
(2)
Ref Load = 2kΩ 1.25 1 ✻✻ V
Bandgap Voltage Reference 1.24 ✻ V
Accuracy I
L
= 0 ±0.5 ✻ %
vs Temperature I
L
= 0 ±18 ✻ ppm/°C