INA111BP

Overview

The INA111BP is a high-speed, FET-input instrumentation amplifier from Texas Instruments. It features a current-feedback topology for excellent performance. Key electrical parameters include a 470 kHz bandwidth and a 12 V/us slew rate. The input bias current is 50 pA with an offset voltage of 250 uV. Common-mode rejection ratio is 106 dB. It operates on supply voltages between 12 V and 36 V. The device draws 3 mA of operating current. Input resistance reaches 5 TOhms. Output current per channel is 25 mA. Voltage noise density is 10 nV/sqrt Hz. Gain options are 1, 10, 100, or 1000 V/V with 0.01% gain error.

Feature Summary

• Utilizes current-feedback topology for high-speed operation
• Provides very high accuracy with low input bias current
• Offers selectable internal gains for flexible signal conditioning

Applications

• Precision data acquisition systems
• Medical equipment requiring high CMRR
• Industrial process control sensors

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and temperature range. Ensure compatibility with existing circuit designs regarding supply voltage limits and thermal management requirements. Cross-reference part numbers with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status if required by regulatory standards.

Selection Notes

Select this component when high speed and low bias current are critical. The FET input stage suits high-impedance sources. Compare bandwidth and slew rate against application needs. Consider the DIP-8 package for through-hole mounting constraints. Evaluate gain settings against required signal amplification levels.

Part Context

This part belongs to the INA110/INA111 series of instrumentation amplifiers. These devices are designed for precision applications requiring fast settling times. The series offers various gain configurations and packaging options. They serve as key components in analog front-end circuits for sensor interfaces.

Replacement Considerations

Check for direct pin-compatible substitutes within the same family. Verify that alternative parts meet the 470 kHz bandwidth requirement. Ensure equivalent input bias current specifications are maintained for high-impedance source compatibility.