Audio Codec 1ADC / 1DAC 56-Pin WLP T/R

The MAX98091 is a fully integrated audio codec whose high-performance, ultra-low power consumption and small footprint make it ideal for portable applications. The device features a highly flexible input scheme with six input pins that can be configured as analog or digital microphone inputs, differential or single-ended line inputs, or as full-scale direct differential inputs. Analog inputs can be routed to the record path ADC or directly to any analog output mixer. The device accepts master clock frequencies of either 256 x fS or from 10MHz to 60MHz. The digital audio interface supports master or slave mode operation, sample rates from 8kHz to 96kHz, and standard PCM formats such as I²S, left/right-justified, and TDM. The record/playback paths feature FlexSound technology DSP. This includes digital gain and filtering, a biquad filter (record), dynamic range control (playback), and a seven band parametric equalizer (playback) that can improve loudspeaker performance by optimizing the frequency response. The stereo Class D speaker amplifier provides efficient amplification, features low radiated emissions, supports filterless operation, and can drive both 4O and 8O loads. The DirectDrive stereo Class H headphone amplifier provides a ground-referenced output eliminating the need for large DC-blocking capacitors. The device also includes a differential receiver (earpiece) amplifier that can be reconfigured as a stereo single-ended line output.

• 102dB DR Stereo DAC to HP
• 4.1mW Stereo Playback Power Consumption
• 99dB DR Stereo ADC
• 4.5mW Stereo Record Power Consumption
• 3 Stereo Single-Ended/Differential Analog Microphone/Line Inputs
• Two PDM Digital Microphone Inputs
• Master Clock Frequencies from 256 x f_S to 60MHz
• I²S/LJ/RJ/TDM Digital Audio Interface
• FlexSound Technology Signal Processing
  • Record Path Biquad Filter
  • Playback Path 7-Band Parametric EQ
  • Playback Path Automatic Level Control
  • Digital Filtering and Gain/Level Control

Stereo Low EMI Class D Speaker Amplifiers

• 3.2W/Channel (R_L = 4O, V_SPKVDD = 5V)
• 1.8W/Channel (R_L = 8O, V_SPKVDD = 5V)

Stereo DirectDrive Class H Headphone Amplifier Jack Detection and Identification

Differential Receiver Amplifier/Stereo Line Output

Extensive Click-and-Pop Reduction Circuitry

RF Immune Analog Inputs and Outputs

Programmable Microphone Bias

I²C Control Interface

56-Bump 0.4mm WLP and 48-Pin 6mm x 6mm x 0.75mm TQFN Packages