INA155UG4

Overview

The INA155UG4 is a single-channel, single-supply instrumentation amplifier manufactured by Texas Instruments. It features rail-to-rail CMOS output and operates within a supply voltage range of 2.7 V to 5.5 V. The device offers a 3 dB bandwidth of 550 kHz and a slew rate of 6.5 V/µs. Key electrical specifications include a common-mode rejection ratio (CMRR) of 78 dB, an input bias current of 50 pA, and an input offset voltage of 1 mV. It is available in an 8-pin VSSOP package.

Feature Summary

• Single-supply operation with rail-to-rail CMOS output capability
• High precision performance with low input bias current and offset voltage
• Integrated fixed gain options for simplified circuit design

Applications

• Portable battery-powered instrumentation systems
• Medical signal acquisition circuits
• Industrial process control sensors

Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's official datasheet to confirm RoHS compliance status and exact pinout configuration. Ensure the selected package variant matches the PCB footprint requirements. Cross-reference the part number with authorized distributors to confirm current availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when a single-supply instrumentation amplifier with rail-to-rail output is required. It is suitable for applications needing high CMRR and low power consumption. Compare its 550 kHz bandwidth against system signal frequencies. Verify that the 2.7 V minimum supply voltage aligns with the system's power budget.

Part Context

The INA155 series belongs to Texas Instruments' portfolio of precision analog signal conditioning devices. This specific model integrates fixed gain stages to reduce external component count. It is designed for applications requiring accurate amplification of small differential signals in noisy environments while maintaining low power consumption.

Replacement Considerations

Check for direct substitutes such as the INA155E or INA155EA variants. Confirm compatibility regarding package type, gain settings, and electrical specifications before substitution.