80mW, DirectDrive Stereo Headphone Driver with Shutdown

The MAX4410 stereo headphone driver is designed for portable equipment where board space is at a premium. The MAX4410 uses a unique DirectDrive architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height.

The MAX4410 delivers up to 80mW per channel into a 16Ω load and has low 0.003% THD+N. A high power-supply rejection ratio (90dB at 1kHz) allows this device to operate from noisy digital supplies without an additional linear regulator. The MAX4410 includes ±8kV ESD protection on the headphone outputs. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. Independent left/right, low-power shutdown controls make it possible to optimize power savings in mixed mode, mono/stereo applications.

The MAX4410 operates from a single 1.8V to 3.6V supply, consumes only 7mA of supply current, has short-circuit and thermal overload protection, and is specified over the extended -40°C to +85°C temperature range. The MAX4410 is available in a tiny (2mm x 2mm x 0.6mm), 16-bump chip-scale package (UCSP™) and a 14-pin TSSOP package.

Applications

* Cell Phones * MP3 Players * Notebook Computers * PDAs * Portable Audio Equipment * Web Pads

* No Bulky DC-Blocking Capacitors Required

* Ground-Referenced Outputs Eliminate DC-Bias Voltages on Headphone Ground Pin

* No Degradation of Low-Frequency Response Due to Output Capacitors

* 80mW Per Channel into 16Ω

* Low 0.003% THD + N

* High PSRR (90dB at 1kHz)

* Integrated Click-and-Pop Suppression

* 1.8V to 3.6V Single-Supply Operation

* Low Quiescent Current

* Independent Left/Right, Low-Power Shutdown Controls

* Short-Circuit and Thermal Overload Protection

* ±8kV ESD-Protected Amplifier Outputs

* Available in Space-Saving Packages

* 16-Bump UCSP (2mm x 2mm x 0.6mm)

* 14-Pin TSSOP