TS4994IST

Overview

The TS4994IST is a single-channel AB-class audio power amplifier in an 8-MiniSO package. It delivers 1W continuous RMS output into an 8Ω load at 5V supply. Operating voltage ranges from 2.5V to 5.5V. Key electrical parameters include 90dB CMRR at 217Hz and 100dB PSRR at 217Hz with grounded inputs. Standby current drops below 10nA. Startup time is typically 15ms.

Feature Summary

• Differential input architecture provides high noise immunity
• Ultra-low standby consumption reduces supply current below 10nA
• Internal thermal shutdown protects against short circuits
• Common mode feedback maintains output bias at VCC/2

Applications

• Mobile phones
• High quality audio applications

Procurement Notes

Verify the specific suffix IST corresponds to the MiniSO-8 package configuration. Confirm RoHS3 compliance status for the manufacturing batch. Check lead-free package certification if required by assembly specifications. Ensure the active low or high standby logic matches the design requirements, noting that MiniSO-8 versions may have fixed logic compared to other packages.

Selection Notes

Select this component for designs requiring differential inputs to reject common-mode noise. The ultra-fast startup time of 15ms suits portable devices needing quick response. Verify that the 8-MiniSO footprint fits the PCB layout constraints. Ensure the application operates within the 2.5V to 5.5V supply range to maintain specified performance levels.

Part Context

This part belongs to STMicroelectronics' audio amplifier portfolio. It is designed for mobile and consumer electronics where space and power efficiency are critical. The device integrates protection features like thermal shutdown and near-zero pop-and-click functionality to enhance user experience in portable audio systems.

Replacement Considerations

No public confirmed substitute part numbers were identified in the provided documentation.