MAX9888 Complete Audio Codec

The Class D speaker amplifier provides efficient amplification of two speakers. The low-radiation design supports filterless operation. When the Class D amplifier is not used, an internal bypass switch can be selected to connect the sensor directly to an external amplifier.

The DirectDrive® headphone amplifier provides true ground-referenced outputs, eliminating the need for bulky DC-blocking capacitors, and the 1.8V headphone operating voltage ensures low power consumption. The device also includes a differential receive amplifier.

Provides three differential analog microphone inputs and supports two PDM digital microphones. Integrated switches allow microphone signals to be connected to external devices. Two flexible single-ended or differential line inputs can be connected to FM radio or other signal sources.

Integrated FLEXSOUND™ technology improves amplifier performance by optimizing signal level and frequency response while meeting maximum distortion and output power limits, preventing speaker damage. Automatic gain control (AGC) and noise threshold optimize the signal level at the microphone input to fully utilize the dynamic range of the ADC.

The device operates over the -40°C to +85°C extended temperature range.

Key Features

100dB DR Stereo DAC (8kHz < fS < 96kHz)

91dB DR Stereo ADC (8kHz < fS < 96kHz)

Low EMI, Stereo Class D Amplifier

950mW/channel (8Ω, VSPKVDD_ = 4.2V)

Stereo DirectDrive Headphone Amplifier

Differential Receiver Amplifier

Two-way stereo single-ended/mono differential line input

3 differential microphone inputs

FLEXSOUND Technology

5-band parametric EQ

Automatic Level Control (ALC)

Drift Limit

Speaker power limit

Speaker Distortion Limiting

Microphone automatic gain control and noise gate

Dual I²S/PCM/TDM digital audio interface

Asynchronous digital mixing

Supports 10MHz to 60MHz master clock frequency

RF-suppressed analog inputs and outputs

Comprehensive click-and-pop suppression circuitry

I²C Control Interface

Available in 63-bump WLP package (3.80mm x 3.30mm, 0.4mm ball pitch)