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.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
INA317 | VSSOP (8) | 3.00 mm × 3.00 mm |
DATE | REVISION | NOTES |
---|---|---|
November 2017 | * | Initial release. |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
REF | 5 | I | Reference input. This pin must be driven by low impedance or connected to ground. |
RG | 1, 8 | — | Gain setting pins. For gains greater than 1, place a gain resistor between pins 1 and 8. |
V+ | 7 | — | Positive supply |
V– | 4 | — | Negative supply |
VIN+ | 3 | I | Positive input |
VIN– | 2 | I | Negative input |
VOUT | 6 | O | Output |