MAX9853 Maxim Integrated Products, MAX9853 Datasheet

MAX9853

Manufacturer Part Number

MAX9853

Description

(MAX9851 / MAX9853) Stereo Audio CODECs

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX9853.pdf (71 pages)

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The MAX9851/MAX9853 are single-chip, stereo audio

CODECs designed to provide a complete audio solu-

tion for a GSM/GPRS/EDGE cell phone. The MAX9851/

MAX9853 provide stereo DirectDrive

amplifiers, a mono receiver speaker amplifier, stereo

Class D speaker amplifiers (MAX9851 only), stereo dif-

ferential line outputs (MAX9853 only), microphone input

amplifiers, plus flexible input selection and gain control.

Two serial digital audio interfaces are included, one

intended to accept voiceband data and the other

accepting I

reconfigured as needed to act as a secondary I

input—allowing multiple audio source mixing of ringer

tones or other audio at different sample rates. A trans-

ducer/vibrator signal can be derived from digital audio.

The stereo digital-to-analog converter (DAC) path

includes filtering and mixing, programmable-gain ampli-

fiers (PGA), soft muting, and optional voiceband digital

filtering. The MAX9851/MAX9853 accept up to two digital

audio inputs at different sample rates. All analog inputs

have PGAs on the front end, allowing dynamic range

optimization with a wide range of input sources.

The stereo analog-to-digital converter (ADC) converts

audio signals from either internal or external microphones

or stereo line inputs. The microphone amplifiers have a

programmable gain from 0 to 40dB to handle both ampli-

fied microphones and electret modules. In addition to a

digital highpass filter to remove DC offset voltages, the

ADC also features voiceband digital filtering.

The digital audio interfaces support a variety of serial

audio formats. The secondary serial audio interface has

an independent supply voltage to allow integration into

multiple supply systems. Control for volume levels, sig-

nal mixing, and operating modes is done through the

All circuitry is optimized for high PSRR. The MAX9851/

MAX9853 use a thermally efficient, space-saving 48-pin

thin QFN package (7mm x 7mm x 0.8mm) with an

exposed pad.

19-3732; Rev 1; 8/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Stereo Audio CODECs with Microphone, DirectDrive

C 2-wire interface.

Headphones, Speaker Amplifiers, or Line Outputs

GSM/GPRS/EDGE Cell Phones

PDAs/SmartPhones

S data. The voiceband interface can be

________________________________________________________________ Maxim Integrated Products

General Description

Applications

headphone

S feed

o +1.7V to +3.3V (Digital) and +2.6V to +3.3V

o +2.6V to +5.5V Class D Speaker Amplifier

o Low 26mW Quiescent Power Consumption

o High 98dB Power-Supply Rejection Ratio

o 8kHz to 48kHz Sample Rate (Replay and Record)

o Stereo 18-Bit ADC and DAC

o Low-Noise Stereo Microphone Inputs and Stereo

o Dual Source Digital Mixing (DAC)

o Selectable Voiceband Filter for

o Digital Filtering, Soft Mute, and Volume Control

o Low-Noise, High-PSRR Microphone Bias

o Stereo DirectDrive Headphone Amplifier

o Mono DirectDrive Handset Receiver Amplifier

o Stereo Class D, Ultra-Low-EMI, Filterless Speaker

o Stereo Differential Line Output Amplifiers

o Clickless/Popless Operation

o Flexible Shutdown Modes for Power Saving

o Comprehensive Headset Detection

o Ultra-Low Power Wake-Up on Headset Detection

Note: All devices specified over the -40°C to +85°C temperature

range.

+Denotes lead-free package.

**EP = Exposed pad.

Pin Configurations and Selector Guide appear at end of data

sheet.

MAX9851ETM+

MAX9853ETM+

(Analog) Operation

Operation (Direct from Battery)

(Playback)

Line Inputs

Recording/Playback Modes

Generator

(2 x 50mW)

Amplifier with Active Emissions Limiting

(2 x 1.25W, 8Ω) (MAX9851)

(MAX9853)

(1 x 105mW)

PART

PIN-PACKAGE

48 TQFN-EP**

(7mm x 7mm x 0.8mm)

48 TQFN-EP**

(7mm x 7mm x 0.8mm)

Ordering Information

Features

PKG CODE

T4877-6

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