OPA349NA/3KG4

Instrumentation, Op Amps, Buffer Amps Overview

The OPA349NA/3KG4 is a single-channel, rail-to-rail CMOS operational amplifier from the Texas Instruments OPA349 family. It operates on a supply voltage range of 1.8 V to 5.5 V with a typical quiescent current of 1 µA per channel. Key electrical specifications include a gain-bandwidth product of 70 kHz, a slew rate of 20 mV/µs, and an input offset voltage of 10 mV. The device features low input bias current of 10 pA and high common-mode rejection ratio of 60 dB. It is housed in a SOT-23-5 surface-mount package and supports an operating temperature range from -40°C to +85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low power consumption with 1 µA supply current per channel for extended battery life.
• Full rail-to-rail input and output swing capability across the entire supply voltage range.
• CMOS technology ensures minimal input bias current and negligible input noise current density.

Instrumentation, Op Amps, Buffer Amps Applications

• Battery-powered portable instrumentation
• Active filtering in signal conditioning circuits
• Sensor interface amplification

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'KG4' against the manufacturer's official datasheet to confirm it denotes tape-and-reel packaging rather than tube or cut-tape formats. Ensure the component matches the exact pinout and marking code specified in the latest revision of the OPA349 data sheet to avoid compatibility issues with existing PCB layouts.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when design constraints require ultra-low static current combined with rail-to-rail signal handling. It is suitable for applications where moderate bandwidth (70 kHz) is sufficient but power efficiency is critical. Compare input offset voltage and bias current requirements against higher-performance alternatives if precision DC accuracy is paramount.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the OPA34x series of micro-power operational amplifiers. It shares architectural similarities with the OPA340 and OPA341 but is optimized for lower power consumption at the expense of reduced bandwidth and slew rate compared to those variants.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference availability through official distributor channels before finalizing design changes.