The INA131 is a low cost, general purpose G = 100 instrumentation amplifier offering excellent accuracy. Its 3-op amp design and small size make it ideal for a wide range of applications. On-chip laser trimmed resistors accurately set a fixed gain of 100. The INA131 is laser trimmed to achieve very low offset voltage (50µV max), drift (0.25µV/°C max), and high CMR (110dB min). Internal input protection can withstand up to ±40V inputs without damage. The INA131 is available in a 8-pin plastic DIP. They are specified over the –40°C to +85°C temperature range.
The INA131 is a low‑cost, general‑purpose instrumentation amplifier offering a fixed gain of 100. Its on‑chip laser‑trimmed resistors provide very low offset voltage (max 50 µV), low drift (0.25 µV/°C) and high common‑mode rejection (110 dB min). The device is supplied in an 8‑pin plastic DIP and operates from +2.25 V to +18 V.
Typical applications include bridge amplifiers, thermocouple and RTD sensor interfaces, medical instrumentation and data‑acquisition systems. The datasheet includes detailed specifications, pin configuration, performance curves, and application notes such as input protection, bias‑current return paths and optional offset‑trimming circuits.
| Gain | 100 (fixed) |
|---|---|
| Supply Voltage Range | +2.25 V to +18 V |
| Input Bias Current (max) | 5 nA |
| Common‑Mode Rejection (min) | 110 dB |
| Gain Error (max) | 0.1 % |
The INA131 has a fixed gain of 100.
The device operates from +2.25 V to +18 V.