TPA112DR

Overview

The TPA112DR is a stereo audio power amplifier from Texas Instruments, packaged in an 8-pin PowerPAD MSOP (D) or SOIC (DGN). It delivers 150 mW of continuous RMS output power per channel into 8-ohm loads. The device operates on a single supply voltage ranging from 2.5 V to 5.5 V and features externally configurable gain settings between 1 and 10 using two resistors per channel. It includes built-in thermal and short-circuit protection.

Feature Summary

• Stereo audio amplification with integrated thermal and short-circuit protection
• Wide single-supply operation capability from 2.5 V to 5.5 V
• Externally adjustable voltage gain via external resistor network
• Standard operational amplifier pinout for simplified integration

Applications

• Portable audio devices requiring low-voltage stereo amplification
• Headphone driver circuits
• Line-level audio outputs for consumer electronics

Procurement Notes

Verify the specific package variant (D or DGN) matches the design requirements, as both are available. Confirm the RoHS compliance status and lead finish details directly with the manufacturer or authorized distributors before finalizing procurement. Ensure the ordering suffix aligns with the required tape and reel packaging specifications.

Selection Notes

Select this component for applications requiring a standard op-amp pinout with higher current drive capabilities. Consider the 150 mW per channel output limit when designing for 8-ohm loads at 5 V. Verify that the external gain-setting resistors maintain an effective impedance between 5 kΩ and 20 kΩ for stable operation. Ensure adequate midrail bypassing is implemented to minimize pop noise during startup.

Part Context

The TPA112 belongs to Texas Instruments' family of high-performance CMOS audio power amplifiers. It is designed for portable applications where low distortion and wide dynamic range are critical. The device shares functional similarities with other members of the series but is distinct in its specific output power rating and package configuration.

Replacement Considerations

TPA6111A2DR is a similar stereo audio amplifier offering comparable functionality in an SOIC-8 package.