Quad Audio Line Driver with 3V Output

The MAX9727 quad audio line driver with 3VRMS output is ideal for portable audio devices where board space and cost is at a premium. The device uses Maxim's DirectDrive® architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors and saving cost, board space, and component height. A high 100dB PSRR and low 0.0005% THD+N ensures clean, low-distortion amplification of the audio signal. Each MAX9727 amplifier can provide 3VRMS to a 1kΩ load with less than 0.003% THD+N while operating from a single +5V supply. Each MAX9727 amplifier can provide 2VRMS to a 1kΩ load with less than 0.003% THD+N while operating from a single +3.3V supply.

A shutdown input disables the amplifiers and reduces quiescent current consumption to less than 100nA. The MAX9727 features Maxim's comprehensive click-and-pop suppression circuitry that reduces audible clicks and pops during startup and shutdown.

The MAX9727 operates from a single 2.7V to 5.5V supply, consumes only 3mA of supply current per channel, and is specified over the -40°C to +85°C extended temperature range.

Applications

* A/V Receivers * CD and DVD Players * Consumer and Professional Audio Equipment * Portable Audio Devices * Set-Top Boxes * Soundcards

* 2.7V to 5.5V Single-Supply Operation

* High 100dB PSRR

* 109dB Signal-to-Noise Ratio (SNR)

* Ground-Referenced Outputs

* No Audible Clicks or Pops at Power-Up/Down

* Differential Inputs

* 3VRMS into 1kΩ Load at 5V

* 2VRMS into 1kΩ Load at 3.3V

* 3mA Supply Current Per Channel

* Unity-Gain Stable

* 100nA Low-Power Shutdown Mode

* CLOAD Drive > 220pF

* ±8kV HBM ESD-Protected Outputs