OPA349UA/2K5G4

Instrumentation, Op Amps, Buffer Amps Overview

The OPA349UA/2K5G4 is a single-channel, rail-to-rail CMOS operational amplifier manufactured by Texas Instruments. It operates within a supply voltage range of 1.8 V to 5.5 V and consumes only 1 µA of quiescent current per channel. The device features a gain-bandwidth product of 70 kHz and a slew rate of 20 mV/µs. Input specifications include a maximum input offset voltage of 10 mV, an input bias current of 10 pA, and an input voltage noise density of 300 nV/√Hz. It provides a common-mode rejection ratio of 60 dB and can deliver up to 10 mA of output current per channel. The component is housed in an SOIC-8 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 quiescent current per channel for extended battery life.
• Rail-to-rail input and output capability maximizes dynamic signal swing across the full supply range.
• CMOS architecture ensures extremely low input bias current of 10 pA for high-impedance source applications.

Instrumentation, Op Amps, Buffer Amps Applications

• Battery-powered sensor interfaces requiring minimal current drain
• Portable medical instrumentation and diagnostic devices
• Data acquisition systems with high-impedance signal sources

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the complete part number including the suffix G4 to confirm RoHS compliance status as specified by the manufacturer. Confirm the SOIC-8 package variant matches the design footprint requirements. Ensure the operating temperature range aligns with the intended environmental conditions. Cross-reference the datasheet revision date to ensure compatibility with latest electrical characteristics. Validate humidity sensitivity level handling procedures during assembly.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when ultra-low power consumption is critical alongside basic amplification needs. The rail-to-rail I/O allows operation at lower supply voltages compared to standard op amps. Consider the 10 mV offset voltage limit for precision requirements. The 10 pA bias current makes it suitable for capacitive or high-resistance sensors. Evaluate the 70 kHz bandwidth against signal frequency requirements.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the OPA349 family of micro-power operational amplifiers designed for low-voltage, low-power applications. It shares architectural similarities with other members like the OPA2349 (dual) and OPA4349 (quad), offering consistent performance characteristics across channel counts. The series emphasizes energy efficiency while maintaining sufficient accuracy for general-purpose analog signal conditioning tasks.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

OPA349UA/NOPB is a direct functional equivalent without the specific tape-and-reel packaging designation. OPA2349UA/2K5G4 offers identical electrical performance in a dual-channel configuration. OPA349NA/3K provides the same core functionality but in a SOT-23-5 package instead of SOIC-8.