MAX98091 Datasheet, PDF (1/174 Pages) Maxim Integrated Products – Ultra-Low Power Stereo Audio Codec

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MAX98091
Ultra-Low Power Stereo Audio Codec
General Description
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 f_S or from 10MHz to 60MHz. The digital audio inter-
face 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 loud-
speaker 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 4Ω and 8Ω loads.
The DirectDrive® stereo Class H headphone ampli-
fier 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.
Simplified Block Diagram
BATTERY 1.8V 1.2V
Features and Benefits
● 102dB DR Stereo DAC to HP
● 4.1mW Playback Power Consumption
● 99dB DR Stereo ADC
● 4.5mW 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 = 4Ω, V_SPKVDD = 5V)
• 1.8W/Channel (R_L = 8Ω, 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 Package
I2S/ TDM
I2C
DIGITAL ^OR
1
MICROPHONE
2
OR
ANALOG
MICROPHONE ^{LINE INPUT}
OR
3
ANALOG
MICROPHONE
LINE INPUT
4
STEREO DIGITAL
MICROPHONE 1
STEREO DIGITAL
MICROPHONE 2
MICROPHONE 1
PREAMP/PGA
(DIFFERENTIAL)
MICROPHONE 2
PREAMP/PGA
(DIFFERENTIAL)
DIGITAL ^OR
MICROPHONE
LINE INPUT A PGA
5
(DIFFERENTIAL OR
6
SINGLE-ENDED)
OR
ANALOG
MICROPHONE ^{LINE INPUT}
LINE INPUT B PGA
(DIFFERENTIAL OR
SINGLE-ENDED)
POWER
MANAGEMENT
DIGITAL AUDIO
INTERFACE
CONTROL
REGISTERS
STEREO
ADC
FLEXSOUND DSP
• DIGITAL BIQUAD FILTER
(RECORD)
• 7-BAND PARAMETRIC
EQUALIZER (PLAYBACK)
• DYNAMIC RANGE CONTROL
(PLAYBACK)
• DIGITAL FILTERING
• DIGITAL GAIN/LEVEL
CONTROL
STEREO
DAC
OR
3-POLE (TRS) 4-POLE (TRRS)
JACK DETECTION
MAX98091
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX98091.related.
Ordering Information appears at end of data sheet.
STEREO LINE OUTPUT
CLASS AB AMPLIFIER
(SINGLE ENDED)
OR
SPEAKER LEFT
CLASS D AMPLIFIER
(DIFFERENTIAL)
SPEAKER LEFT
CLASS D AMPLIFIER
(DIFFERENTIAL)
SPEAKER RIGHT
CLASS D AMPLIFIER
(DIFFERENTIAL)
STEREO HEADPHONE
CLASS H AMPLIFIER
(SINGLE-ENDED)
CHARGE PUMP
LINE OUTPUT
OR
RECEIVER/
EARPIECE
SPEAKER
LEFT/ RIGHT
HEADPHONES
OR
HEADSET
19-6700; Rev 0; 5/13