INA131AP-1

Overview

The INA131AP-1 is a precision instrumentation amplifier with a fixed gain of 100. It features a maximum offset voltage of 125 µV, a slew rate of 0.7 V/µs, and a bandwidth of 70 kHz. The device operates on dual supplies ranging from ±2.25V to ±18V. It is housed in an 8-pin PDIP plastic DIP package.

Feature Summary

• Fixed internal gain of 100 eliminates external resistor requirements
• Very low input offset voltage and drift for high accuracy
• High common-mode rejection ratio (CMRR) of 110 dB

Applications

• Photodiode amplification circuits
• Precision signal conditioning
• Industrial process control sensors

Procurement Notes

Verify the exact suffix against the manufacturer's current datasheet, as legacy Burr-Brown parts may have specific ordering codes or status changes. Confirm package type and temperature range availability through authorized distributors, noting that this component may be classified as obsolete or not recommended for new designs.

Selection Notes

Select this part when a fixed gain of 100 is required without external components. Ensure the supply voltage range supports the application's rail requirements. Consider the 70 kHz bandwidth limit for signal frequency constraints. Verify compatibility with the 8-pin DIP footprint during PCB layout.

Part Context

Part of the INA131 family of precision instrumentation amplifiers manufactured by Burr-Brown, now part of Texas Instruments. The series is designed for applications requiring high accuracy and stability with minimal external component count.

Replacement Considerations

Check for direct pin-compatible substitutes within the INA131 series or modern TI instrumentation amplifiers with similar fixed gain specifications. Verify electrical parameter equivalence before substitution.