Low Power Audio Codec
SSM2603
FEATURES
GENERAL DESCRIPTION
Stereo, 24-bit analog-to-digital and digital-to-analog converters
DAC SNR: 100 dB (A-weighted), THD: −80 dB at 48 kHz, 3.3 V
ADC SNR: 90 dB (A-weighted), THD: −80 dB at 48 kHz, 3.3 V
Highly efficient headphone amplifier
Stereo line input and monaural microphone input
Low power
The SSM2603 is a low power, high quality stereo audio codec
for portable digital audio applications with one set of stereo
programmable gain amplifier (PGA) line inputs and one
monaural microphone input. It features two 24-bit analog-to-
digital converter (ADC) channels and two 24-bit digital-to-
analog (DAC) converter channels.
7 mW stereo playback (1.8 V/1.5 V supplies)
14 mW record and playback (1.8 V/1.5 V supplies)
Low supply voltages
Analog: 1.8 V to 3.6 V
Digital core: 1.5 V to 3.6 V
Digital I/O: 1.8 V to 3.6 V
256/384 oversampling rate in normal mode; 250/272 over-
sampling rate in USB mode
Audio sampling rates: 8 kHz, 11.025 kHz, 12 kHz, 16 kHz,
22.05 kHz, 24 kHz, 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz,
and 96 kHz
The SSM2603 can operate as a master or a slave. It supports
various master clock frequencies, including 12 MHz or 24 MHz
for USB devices; standard 256 fS or 384 fS based rates, such as
12.288 MHz and 24.576 MHz; and many common audio sampling
rates, such as 96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz, 32 kHz, 24 kHz,
22.05 kHz, 16 kHz, 12 kHz, 11.025 kHz, and 8 kHz.
The SSM2603 can operate at power supplies as low as 1.8 V for
the analog circuitry and as low as 1.5 V for the digital circuitry.
The maximum voltage supply is 3.6 V for all supplies.
The SSM2603 software-programmable stereo output options
provide the user with many application possibilities because the
device can be used as a headphone driver or as a speaker driver.
Its volume control functions provide a large range of gain
control of the audio signal.
28-lead, 5 mm × 5 mm LFCSP (QFN) package
APPLICATIONS
Mobile phones
MP3 players
The SSM2603 is specified over the industrial temperature range
of −40°C to +85°C. It is available in a 28-lead, 5 mm × 5 mm
lead frame chip scale package (LFCSP).
Portable gaming
Portable electronics
Educational toys
FUNCTIONAL BLOCK DIAGRAM
AVDD VMID AGND
DBVDD DGND DCVDD
HPVDD PGND
SSM2603
MICBIAS
BYPASS
6dB TO 15dB/MUTE 3dB STEP
–34.5dB TO +33dB,
1.5dB STEP
–73dB TO +6dB,
1dB STEP
SIDETONE
RHPOUT
ROUT
RLINEIN
MICIN
MUX
MUX
ADC
ADC
DAC
DIGITAL
PROCESSOR
LOUT
0dB/20dB/
40dB BOOST
DAC
LLINEIN
LHPOUT
–34.5dB TO +33dB,
1.5dB STEP
6dB TO 15dB/MUTE 3dB STEP
–73dB TO +6dB,
1dB STEP
SIDETONE
BYPASS
CLK
DIGITAL AUDIO INTERFACE
CONTROL INTERFACE
MCLK/ XTO CLKOUT
XTI
PBDAT RECDAT BCLK PBLRC RECLRC MUTE CSB SDIN SCLK
Figure 1.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2008 Analog Devices, Inc. All rights reserved.
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