TS4890IST

Overview

The TS4890IST is a single-channel Class-A audio power amplifier manufactured by STMicroelectronics, housed in an 8-pin MiniSO package. It delivers 1 W of continuous RMS output power into an 8-ohm load at a 5 V supply voltage with 1% THD. The device operates from a single supply ranging from 2.2 V to 5.5 V and draws only 6 mA during normal operation. Key electrical specifications include a gain-bandwidth product of 2 MHz, a total harmonic distortion plus noise of 0.15%, and a power supply rejection ratio of 75 dB at 217 Hz. It functions within a temperature range of -40°C to +85°C.

Feature Summary

• Ultra-low standby consumption reduces supply current to less than 10 nA when the active-low standby pin is engaged.
• Integrated pop and click reduction circuitry minimizes audible transients during power-up and power-down sequences.
• Internal thermal shutdown protection safeguards the device against overheating under fault conditions.
• Unity-gain stability allows for flexible configuration using external gain-setting resistors without oscillation risks.

Applications

• Mobile phones and cellular devices
• Laptop and notebook computers
• Portable audio devices

Procurement Notes

Verify the specific suffix IST corresponds to the MiniSO-8 package type required for your design. Confirm RoHS compliance status through official manufacturer documentation before integration. Ensure the operating voltage range aligns with your system's power supply rails. Check for any recent product change notices regarding pinout or electrical characteristics updates.

Selection Notes

Select this component for mono audio applications requiring high efficiency and low distortion in portable electronics. The MiniSO-8 package suits space-constrained designs compared to standard SO-8 variants. Consider the 2.2 V minimum supply voltage when designing for battery-powered systems. Verify that the 1 W output capability matches the speaker impedance and desired volume levels.

Part Context

The TS4890IST belongs to the TS4890 family of audio amplifiers designed for mobile and portable consumer electronics. This series emphasizes minimal external component count and high audio fidelity. The IST variant specifically denotes the MiniSO-8 packaging option, offering a smaller footprint suitable for compact handheld devices while maintaining the same electrical performance as other package versions in the family.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult official STMicroelectronics resources for potential cross-references or newer generation replacements if availability becomes an issue.