1 Features
• 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

2 Applications
• Bridge Amplifiers
• ECG Amplifiers
• Pressure Sensors
• Medical Instrumentation
• Portable Instrumentation
• Weigh Scales
• Thermocouple Amplifiers
• RTD Sensor Amplifiers
• Data Acquisition

3 Description
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 surfacemount
package and is specified over the TA = –40°C
to +125°C temperature range.