AD1839A Datasheet, PDF (1/24 Pages) Analog Devices – 2 ADC, 6 DAC, 96 kHz, 24-Bit Sigma-Delta Codec

2 ADC, 6 DAC,
96 kHz, 24-Bit Sigma-Delta Codec
AD1839A
FEATURES
5 V stereo audio system with 3.3 V tolerant digital interface
Supports up to 96 kHz sample rates
192 kHz sample rate available on 1 DAC
Supports 16-/20-/24-bit word lengths
Multibit Σ-∆ modulators with perfect differential linearity
restoration for reduced idle tones and noise floor
Data-directed scrambling DACs—least sensitive to jitter
Single-ended output
ADCs: −95 dB THD + N, 105 dB SNR and dynamic range
DACs: −92 dB THD + N, 108 dB SNR and dynamic range
On-chip volume controls per channel with 1024-step linear
scale
DAC and ADC software controllable clickless mutes
Digital de-emphasis processing
Supports 256 × fS, 512 × fS, and 768 × fS master mode clocks
Power-down mode and soft power-down mode
Flexible serial data port with right-justified, left-justified,
I²S compatible, and DSP serial modes
TDM interface mode supports 8-in/8-out operation using a
single SHARC® SPORT
52-lead MQFP plastic package
APPLICATIONS
GENERAL DESCRIPTION
The AD1839A is a high performance single-chip codec that
features three stereo DACs and one stereo ADC. Each DAC
comprises a high performance digital interpolation filter, a
multibit Σ-∆ modulator featuring Analog Devices’ patented
technology, and a continuous-time voltage-out analog section.
Each DAC has independent volume control and clickless mute
functions. The ADC comprises two 24-bit conversion channels
with multibit Σ-∆ modulators and decimation filters.
The AD1839A also contains an on-chip reference with a
nominal value of 2.25 V.
The AD1839A contains a flexible serial interface that allows
glueless connection to a variety of DSP chips, AES/EBU
receivers, and sample rate converters. The AD1839A can be
configured in left-justified, right-justified, I²S, or DSP compati-
ble serial modes. Control of the AD1839A is achieved by means
of an SPI® compatible serial port. While the AD1839A can be
operated from a single 5 V supply, it also features a separate
supply pin for its digital interface that allows the device to be
interfaced to other devices using 3.3 V power supplies. The
AD1839A is available in a 52-lead MQFP package and is
specified for the −40°C to +85°C industrial temperature range.
DVD video and audio players
Home theater systems
Automotive audio systems
Audio/visual receivers
Digital audio effects process
FUNCTIONAL BLOCK DIAGRAM
DVDD DVDD ODVDD ALRCLK ABCLK ASDATA CCLK CLATCH CIN COUT MCLK PD/RST M/S AVDD AVDD
AAUXDATA3
DLRCLK
DBCLK
DSDATA1
DSDATA2
DSDATA3
DAUXDATA
ADCLP
ADCLN
ADCRP
ADCRN
Σ-∆
ADC
Σ-∆
ADC
SERIAL DATA
I/O PORT
DIGITAL
FILTER
DIGITAL
FILTER
CONTROL PORT
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
CLOCK
DIGITAL
FILTER
DIGITAL
FILTER
DIGITAL
FILTER
AD1839A
DGND DGND AGND AGND AGND AGND
Figure 1.
Σ-∆
DAC
Σ-∆
DAC
Σ-∆
DAC
V_REF
OUTL1
OUTR1
OUTL2
OUTR2
OUTL3
OUTR3
FILTD
FILTR
Rev. B
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