INA317 Texas instruments

INA317

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INA317

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Описание

The INA317 is a low-power, precision instrumentation amplifier offering excellent accuracy. The versatile 3-operational amplifier design, small size and low power make the INA317 usable in a wide range of portable applications. A single external resistor sets any gain from 1 to 1000, as defined by the industry-standard gain equation: G = 1 + (100 kΩ / RG).The instrumentation amplifier provides low offset voltage (75 µV, G ≥ 100), excellent offset voltage drift (0.3 µV/°C, G ≥ 100) and high common-mode rejection (100 dB at G ≥ 10). The INA317 operates with power supplies as low as 1.8 V (±0.9 V) and a quiescent current of 50 µA, making the device usable in battery-operated systems. Using autocalibration techniques to ensure precision over the extended industrial temperature range, the INA317 device offers low noise density (50 nV/√Hz) that extends down to DC.The INA317 is available in an 8-pin VSSOP surface-mount package and is specified over the TA = –40°C to +125°C temperature range.

Low Offset Voltage: 75 µV (Maximum), G ≥ 100
Low Drift: 0.3 µV/°C, G ≥ 100
Low Noise: 50 nV/√Hz, G ≥ 100
High CMRR: 100 dB (Minimum), G ≥ 10
Low Input Bias Current: 200 pA (Maximum)
Supply Range: 1.8 V to 5.5 V
Input Voltage: (V–) 0.1 V to (V+) –0.1 V
Output Range: (V–) 0.05 V to (V+) –0.05 V
Low Quiescent Current: 50 µA
Operating Temperature: –40°C to +125°C
RFI Filtered Inputs
8-Pin VSSOP Package

Number of channels	1
Vs (max) (V)	5.5
Vs (min) (V)	1.8
Input offset (±) (max) (µV)	75
Voltage gain (min) (V/V)	1
Voltage gain (max) (V/V)	1000
Noise at 1 kHz (typ) (nV√Hz)	50
Features	Zero Drift
CMRR (min) (dB)	100
Input offset drift (±) (max) (V/°C)	0.0000003
Input bias current (±) (max) (nA)	0.2
Iq (typ) (mA)	0.05
Bandwidth at min gain (typ) (MHz)	0.15
Gain error (±) (max) (%)	0.25
Operating temperature range (°C)	-40 to 125
Rating	Catalog
Type	Resistor
Output swing headroom (to negative supply) (typ) (V)	0.05
Output swing headroom (to positive supply) (typ) (V)	-0.05
Input common mode headroom (to negative supply) (typ) (V)	0.1
Input common mode headroom (to positive supply) (typ) (V)	-0.1
Noise at 0.1 Hz to 10 Hz (typ) (µVPP)	1