INA131AP

Overview

The INA131AP is a precision instrumentation amplifier from Texas Instruments featuring a fixed gain of 100 V/V. It utilizes a three-op-amp architecture to deliver high accuracy and low offset voltage, specified at 0.125 mV. The device operates with a supply voltage range of ±2.25 V to ±18 V and draws a typical supply current of 3 mA. Key electrical parameters include a bandwidth of 70 kHz and a common-mode rejection ratio suitable for noisy environments. It is housed in an 8-pin PDIP package.

Feature Summary

• Fixed gain of 100 V/V eliminates external resistor trimming requirements
• Three-op-amp topology provides high input impedance and excellent common-mode rejection
• Low offset voltage ensures high measurement accuracy in precision applications
• Wide single or dual supply voltage operation supports diverse system power constraints

Applications

• Industrial automation signal conditioning
• Medical instrumentation data acquisition
• Pressure and current sensor interfaces

Procurement Notes

Verify the specific suffix (e.g., AP) against the required package type and temperature rating. Confirm that the fixed gain of 100 matches the design requirements, as no external gain setting resistors are provided. Ensure the supply voltage range aligns with the target application's power rails before ordering.

Selection Notes

Select this component when a fixed gain of 100 is required without external resistor networks. It is suitable for applications demanding high input impedance and low offset voltage. Consider the 8-pin PDIP package for through-hole mounting needs. Evaluate if the 70 kHz bandwidth meets the signal frequency requirements of the specific use case.

Part Context

The INA131 belongs to Texas Instruments' family of general-purpose instrumentation amplifiers. It is designed for cost-sensitive applications requiring high accuracy. The AP variant specifically denotes the 8-pin plastic dual in-line package. This series is commonly used where stable, precise amplification of small differential signals is necessary.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before considering alternative components.

FAQ

What is the fixed gain of the INA131AP?

The INA131AP has a fixed internal gain of 100 V/V.

What is the maximum supply voltage for the INA131AP?

The maximum supply voltage is ±18 V.