MAX98088 Stereo Audio Codec with FlexSound Technology
123Pages

________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Stereo Audio Codec with FLEXSOUND Technology MAX98088 19-5335; Rev 0; 6/10 Simplified Block Diagram General Description The MAX98088 is a full-featured audio codec whose high performance and low power consumption make it ideal for portable applications. Class D speaker amplifiers provide efficient amplification for two speakers. Low radiated emissions enable completely filterless operation. Integrated bypass switches optionally connect an external amplifier to the transducer when the Class D amplifiers are disabled. The IC features a stereo Class H headphone amplifier that utilizes a dual-mode charge pump to maximize efficiency while outputting a ground referenced signal that does not require output coupling capacitors. The IC also features a mono differential amplifier that can also be configured as a stereo line output. Three differential analog microphone inputs are available as well as support for two PDM digital microphones. Integrated switches allow microphone signals to be routed out to external devices. Two flexible single-ended or differential line inputs may be connected to an FM radio or other sources. Integrated FLEXSOUNDK technology improves loudspeaker performance by optimizing the signal level and frequency response while limiting the maximum distortion and power at the output to prevent speaker damage. Automatic gain control (AGC) and a noise gate optimize the signal level of microphone input signals to make best use of the ADC dynamic range. The device is fully specified over the -40NC to +85NC extended temperature range. Features S 5.6mW Power Comsumption (DAC to HP at 97dB DR) S 101dB DR Stereo DAC (8kHz < fS < 96kHz) S 93dB DR Stereo ADC (8kHz < fS < 96kHz) S Stereo Low EMI Class D Amplifiers 950mW/Channel (8I, VSPKVDD_ = 4.2V) S Efficient Class H Headphone Amplifier S Differential Receiver Amplifier/Stereo Line Outputs S 2 Stereo Single-Ended/Mono Differential Line Inputs S 3 Differential Microphone Inputs S FLEXSOUND Technology 5-Band Parametric EQ Automatic Level Control (ALC) Excursion Limiter Speaker Power Limiter Speaker Distortion Limiter Microphone Automatic Gain Control and Noise Gate S Dual I2S/PCM/TDM Digital Audio Interfaces S Asynchronous Digital Mixing S Supports Master Clock Frequencies from 10MHz to 60MHz S RF Immune Analog Inputs and Outputs S Extensive Click-and-Pop Reduction Circuitry S Available in 63-Bump WLP Package (3.80mm x 3.30mm, 0.4mm Pitch) +Denotes lead(Pb)-free/RoHS-compliant package. Ordering Information FLEXSOUND is a trademark of Maxim Integrated Products, Inc. EVALUATION KIT AVAILABLE PART TEMP RANGE PIN-PACKAGE MAX98088EWY+ -40NC to +85NC 63 WLP DIGITAL MICROPHONE INPUT + + LINEIN A1 LINEIN A2 LINEIN B1 LINEIN B2 DAC DAC MIX RECEIVER/LINEOUT AMPS SPEAKER AMP SPEAKER AMP HEADPHONE AMP HEADPHONE AMP ADC ADC MIX FLEXSOUND TECHNOLOGY • 5-BAND PARAMETRIC EQ • AUTOMATIC LEVEL CONTROL • LOUDSPEAKER PROCESSING • EXCURSION LIMITER • THD LIMITER • POWER LIMITER • MICROPHONE PROCESSING • AUTOMATIC GAIN CONTROL • NOISE GATE • ASYNCHRONOUS DIGITAL MIXING I2C CONTROL I2S/PCM DIGITAL AUDIO INTERFACE I2S/PCM MAX98088 DIGITAL AUDIO INTERFACE

Stereo Audio Codec with FLEXSOUND Technology MAX98088 2 Table of Contents General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Functional Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Absolute Maximum Ratings . ....

Stereo Audio Codec with FLEXSOUND Technology MAX98088 3 TABLE OF CONTENTS (continued) Record Path Signal Processing . . . . . . . . . . . . . . . . . . . 69 Microphone AGC . . . . . . . . . . . . . . . . . . . . . 69 Noise Gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 ADC Record Level Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Sidetone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Digital Audio Interfaces . . . . . . . . . . 74 Clock Control . . . . . . . . ....

Stereo Audio Codec with FLEXSOUND Technology MAX98088 4 TABLE OF CONTENTS (continued) Battery Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 Device Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 I2C Serial Interface . . . . . . 112 Bit Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 START and STOP Conditions . . . . . . . . . . . . . . 112 Early STOP Conditions . . . . . . 112 Device Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 Slave...

Stereo Audio Codec with FLEXSOUND Technology MAX98088 5 Functional Diagram SDA SCL I2C F4 F5 E5 E2 MCLK CLOCK CONTROL G8 MIC2N G9 MIC2P F8 E6 JACKSNS JACK DETECTION JDETEN MBEN F7 MICBIAS REG INABYP MIC2BYP PGAM2: +20dB TO 0dB PGAM1: +20dB TO 0dB PA2EN: 0/20/30dB EXTMIC PA1EN: 0/20/30dB EXTMIC MIC1N/ DIGMICCLK E8 MIC1P/ DIGMICDATA DSTS MAS1 DAI1 SEL1 SEL2 BCLK1 BCLKS1 D1 D4 D2 E4 E1 F2 F3 G1 G3 G2 LRCLK1 SDOUT1 SDIN1 SIDETONE DVST: 0dB TO -60dB LTEN1 LBEN2 AUTOMATIC GAIN CONTROL EQ1EN EQ2EN DVEQ1: 0dB TO -15dB DV1G: 0/6/12/18dB DV2: 0dB TO -15dB DCB2 5-BAND PARAMETRIC EQ 5-BAND PARAMETRIC...

Stereo Audio Codec with FLEXSOUND Technology MAX98088 7 ELECTRICAL CHARACTERISTICS (continued) (VAVDD = VPVDD = VDVDD = VDVDDS1 = VDVDDS2 = +1.8V, VSPKLVDD = VSPKRVDD = 3.7V. Speaker loads (ZSPK) connected between SPK_P and SPK_N. Receiver load (RREC) connected between RECP and RECN. Headphone loads (RHP) connected from HPL or HPR to HPGND. Line out loads (RLOAD) connected from LOUTL and LOUTR to ground. RLOAD = RHP = J, RREC = J, ZSPK = J, CREF = 2.2FF, CMICBIAS = CREG = 1FF, CC1N-C1P = 1FF, CHPVDD = CHPVSS = 1FF. AVMICPRE_ = +20dB, AVMICPGA_ = 0dB, AVDACATTN = 0dB, AVDACGAIN = 0dB,...