Datasheet

MAX98090 Ultra-Low Power Stereo Audio Codec
General Description
The MAX98090 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 (WLP) 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 I
2
S, 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.
Features and Benets
● 102dB DR Stereo DAC to HP (8kHz < f
S
< 96kHz)
● 3.6mW Stereo Playback Power Consumption
● 99dB DR Stereo ADC (8kHz < f
S
< 96kHz)
● 4.2mW Stereo Record Power Consumption
● 3 Stereo Single-Ended/Differential Analog
Microphone/Line Inputs (WLP Version)
● Stereo PDM Digital Microphone Input
● Master Clock Frequencies from 256 x f
S
to 60MHz
● I
2
S/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
SPK_VDD
= 5V, WLP)
• 1.8W/Channel (R
L
= 8Ω, V
SPK_VDD
= 5V, WLP)
● 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
● I
2
C Control Interface with Two Address Options
● 49-Bump 0.4mm WLP and 40-Pin TQFN Packages
19-6492; Rev 2; 8/13
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX98090.related.
Simplied Block Diagram
EVALUATION KIT AVAILABLE
MICROPHONE 1
PREAMP/PGA
(DIFFERENTIAL)
• DIGITAL BIQUAD FILTER
(RECORD)
• 7-BAND PARAMETRIC
EQUALIZER (PLAYBACK)
• DYNAMIC RANGE CONTROL
(PLAYBACK)
• DIGITAL FILTERING
• DIGITAL GAIN/LEVEL
CONTROL
FLEXSOUND DSP
LINE INPUT A PGA
(DIFFERENTIAL OR
SINGLE-ENDED)
MICROPHONE 2
PREAMP/PGA
(DIFFERENTIAL)
LINE INPUT B PGA
(DIFFERENTIAL OR
SINGLE-ENDED)
6
5
STEREO DIGITAL
MICOPHONE
POWER
MANAGEMENT
CONTROL
REGISTERS
I
2
C
DIGITAL AUDIO
INTERFACE
I
2
S/TDMBATTERY 1.2V1.8V
JACK DETECTION
4
3
2
1
CHARGE PUMP
STEREO
ADC
STEREO
DAC
MAX98090
STEREO HEADPHONE
CLASS H AMPLIFIER
(SINGLE ENDED)
SPEAKER RIGHT
CLASS D AMPLIFIER
(DIFFERENTIAL)
SPEAKER LEFT
CLASS D AMPLIFIER
(DIFFERENTIAL)
SPEAKER LEFT
CLASS D AMPLIFIER
(DIFFERENTIAL)
STEREO LINE OUTPUT
CLASS AB AMPLIFIER
(SINGLE ENDED)
OR
3-POLE (TRS) 4-POLE (TRRS)
OR
ANALOG
MICROPHONE
DIGITAL
MICROPHONE
LINE INPUT
OR
OR
ANALOG
MICROPHONE
LINE INPUT
OR
ANALOG
MICROPHONE
LINE INPUT
OR
HEADPHONES
OR
HEADSET
LINE OUTPUT
RECEIVER/
EARPIECE
OR
SPEAKER
LEFT/RIGHT