INA131AP-1G4

Overview

The INA131AP-1G4 is a precision instrumentation amplifier manufactured by Texas Instruments. It features a fixed gain of 100 V/V, making it suitable for applications requiring high accuracy without external resistor trimming. The device utilizes a three-op amp architecture to provide excellent common-mode rejection and low offset voltage. It operates on dual power supplies ranging from ±2.25V to ±18V or a single supply up to 36V. The component is housed in an 8-pin PDIP package and offers a bandwidth of approximately 70 kHz with a maximum input offset voltage of 125 µV.

Feature Summary

• Fixed unity-gain-of-100 configuration eliminates the need for external gain-setting resistors
• Three operational amplifier topology ensures high common-mode rejection ratio
• Low input offset voltage supports precise signal conditioning in measurement systems

Applications

• Industrial process control sensor interfaces
• Medical equipment signal amplification
• Precision data acquisition systems

Procurement Notes

Verify the obsolete status of this specific part number before procurement planning. Confirm availability through authorized distributors or surplus suppliers as original manufacturing may have ceased. Ensure compatibility with existing PCB footprints and thermal requirements. Check for updated replacement components if long-term supply stability is required for production cycles.

Selection Notes

Select this component when a fixed gain of 100 is required to simplify circuit design and reduce component count. It is appropriate for low-frequency precision applications where high common-mode rejection is critical. Consider alternative devices if variable gain or higher bandwidth is necessary. Verify that the operating voltage range aligns with the system power supply constraints.

Part Context

This part belongs to the INA131 family of precision instrumentation amplifiers. The 'AP' suffix indicates an 8-pin plastic DIP package. The '-1G4' suffix typically denotes a specific tape-and-reel packaging variant or environmental compliance marking, though the core electrical characteristics remain identical to the standard INA131AP. It is designed for general-purpose high-accuracy applications.

Replacement Considerations

Public sources indicate the INA131AP-1G4 is obsolete. Direct functional substitutes include the INA131AP (standard version) or newer generations such as the INA333 series for improved performance. Verify pinout compatibility and gain specifications when selecting alternatives.