Datasheet

INA149
SBOS579B –SEPTEMBER 2011–REVISED JULY 2012 www.ti.com
ELECTRICAL CHARACTERISTICS: V+ = 5 V and V– = 0 V
At T
A
= +25°C, R
L
= 2 kΩ connected to 2.5 V, and V
CM
= REF
A
= REF
B
= 2.5 V, unless otherwise noted.
INA149
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
GAIN
Initial V
OUT
= 1.5 V to 3.5 V 1 V/V
Gain error V
OUT
= 1.5 V to 3.5 V ±0.005 %FSR
Gain vs temperature, T
A
= –40°C to +125°C ±1.5 ppm/°C
Nonlinearity ±0.0005 %FSR
OFFSET VOLTAGE
350 µV
Initial offset vs temperature, T
A
= –40°C to +125°C 3 µV/°C
vs supply (PSRR), V
S
= 4 V to 5 V 120 dB
INPUT
Differential 800 kΩ
Impedance
Common-mode 200 kΩ
Differential 1.5 3.5 V
Voltage range
Common-mode –20 25 V
At dc, V
CM
= –20 V to 25 V 100 dB
vs temperature, T
A
= –40°C to +125°C, at dc 100 dB
Common-mode rejection
At ac, 500 Hz, V
CM
= 49 V
PP
100 dB
At ac, 1 kHz, V
CM
= 49 V
PP
90 dB
OUTPUT
Voltage range 1.5 3.5 V
Short-circuit current ±15 mA
Capacitive load drive No sustained oscillations 10 nF
OUTPUT NOISE VOLTAGE
0.01 Hz to 10 Hz 20 µV
PP
10 kHz 550 nV/√Hz
DYNAMIC RESPONSE
Small-signal bandwidth 500 kHz
Slew rate V
OUT
= 2 V
PP
step 5 V/µs
Full-power bandwidth V
OUT
= 2 V
PP
32 kHz
Settling time 0.01%, V
OUT
= 2 V
PP
step 7 µs
POWER SUPPLY
Voltage range 5 V
V
S
= 5 V 810 µA
Quiescent current
vs temperature, T
A
= –40°C to +125°C 1 mA
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