SSM2604 Datasheet, PDF (1/28 Pages) Analog Devices – Low Power Audio Codec

Low Power Audio Codec
SSM2604
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
Stereo line inputs
Low power
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: 1.5 V to 3.6 V
256/384 oversampling rate in normal mode;
250/272 oversampling 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
20-lead, 4 mm × 4 mm LFCSP (QFN) package
APPLICATIONS
Mobile phones
MP3 players
Portable gaming
Portable electronics
Educational toys
The SSM2604 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. It features two
24-bit analog-to-digital converter (ADC) channels and two
24-bit digital-to-analog (DAC) converter channels.
The SSM2604 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 sam-
pling 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 SSM2604 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 SSM2604 is specified over the industrial temperature range
of −40°C to +85°C. It is available in a 20-lead, 4 mm × 4 mm
lead frame chip scale package (LFCSP).
FUNCTIONAL BLOCK DIAGRAM
AVDD VMID AGND
DVDD DGND
BYPASS
SSM2604
–34.5dB TO +33dB,
1.5dB STEP
RLINEIN
ADC
DAC
ROUT
DIGITAL
PROCESSOR
LLINEIN
–34.5dB TO +33dB,
1.5dB STEP
ADC
DAC
LOUT
CLK
BYPASS
DIGITAL AUDIO INTERFACE
CONTROL INTERFACE
MCLK/ XTO CLKOUT
XTI
PBDAT RECDAT BCLK PBLRC RECLRC SDIN
Figure 1.
SCLK
Rev. 0
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