MAX9890BEBL+T

Audio Special Purpose Overview

The MAX9890BEBL+T is a single-channel audio click-and-pop suppressor manufactured by Analog Devices Inc./Maxim Integrated. It provides click-and-pop suppression for devices such as CODECs with integrated headphone amplifiers that lack clickless/popless startup or shutdown capabilities. The device controls the ramping of the DC bias voltage on output-coupling capacitors and the application of the audio signal to ensure no audible transients are present at the headphones. The 'B' suffix indicates a 330ms startup time, suitable for use with coupling capacitors greater than 100µF. The MAX9890 consumes 14µA of supply current and 0.001µA in shutdown, while contributing less than 0.003% THD+N into a 32Ω load. It features ±8kV ESD protection (Human Body Model) on the outputs.

Audio Special Purpose Feature Summary

• 36dB Click-Pop Suppression
• 2.7V to 5.5V Single-Supply Operation
• Clickless/Popless Startup/Power-Up and Shutdown/Power-Down
• 0.001µA Low-Power Shutdown Mode
• THD+N < 0.003% Into 32Ω
• ±8kV ESD Protected Outputs (Human Body Model)
• Requires Only One 0.1µF Capacitor to Complete the Circuit
• Low 14µA Supply Current
• Tiny Packaging: 9-Bump UCSP (1.5mm x 1.5mm x 0.6mm)

Audio Special Purpose Applications

• Cell Phones
• High-End Notebook Audio
• PDAs
• Portable DVD Players
• Portable MP3 Players

Audio Special Purpose Procurement Notes

Verify the specific suffix 'B' indicates a 330ms turn-on time suitable for coupling capacitors greater than 100µF. Confirm the '+T' designation corresponds to Tape & Reel packaging. Check for RoHS compliance status as indicated by the '+' suffix. Ensure the 9-bump UCSP footprint matches the PCB layout requirements.

Audio Special Purpose Selection Notes

Select the MAX9890B variant over the A version if the application requires coupling capacitors larger than 100µF, as the B version offers a 330ms turn-on time compared to the A version's 200ms. Verify that the 9-bump UCSP package dimensions (1.5mm x 1.5mm) fit the available board space. Ensure the system voltage remains within the 2.7V to 5.5V range.

Audio Special Purpose Part Context

The MAX9890 series addresses transient issues in single-supply audio systems. The MAX9890BEBL+T specifically uses the 9-bump UCSP package and the 'B' speed grade for slower ramping. This component sits between the audio source (CODEC/amp) and the output coupling capacitors/headphones to filter DC bias changes.