Multichannel 96 kHz Codec
Data Sheet
AD1836A
Rev. A
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FEATURES
5 V multichannel audio system
Accepts 16-/18-/20-/24-bit data
Supports 24-bit and 96 kHz sample rate
Multibit Σ-∆ modulators with data directed
scrambling
Differential output for optimum performance
ADCs: –92 dB THD + N, 105 dB SNR and dynamic range
DACs: –95 dB THD + N, 108 dB SNR and dynamic range
On-chip volume control with "auto-ramp" function
Programmable gain amplifier for ADC input
Hardware and software controllable clickless mute
Digital de-emphasis processing
Supports 256 × f
S
, 512 × f
S
, or 768 × f
S
master clock
Power-down mode plus soft power-down mode
Flexible serial data port with right justified, left justified, I
2
S
compatible, and DSP serial port modes
TDM interface mode supports 8 in/8 out using a single
SHARC® SPORT
52-lead MQFP (PQFP) plastic package
APPLICATIONS
Home theater systems
Automotive audio systems
DVD recorders
Set-top boxes
Digital audio effects processors
PRODUCT OVERVIEW
The AD1836A is a high performance, single-chip codec that
provides three stereo DACs and two stereo ADCs using Analog
Devices, Inc., patented multibit Σ-Δ architecture. An SPI® port
is included, allowing a microcontroller to adjust volume and
many other parameters. The AD1836A operates from a 5 V
supply, with provision for a separate output supply to interface
with low voltage external circuitry. The AD1836A is available in
a 52-lead MQFP (PQFP) package.
FUNCTIONAL BLOCK DIAGRAM
DIGITAL
FILTER
-
DAC
DAC1L
DAC1R
CLOCK
MCLK
COUT
V
REF
CONTROL PORT
CCLK CDATA CLATCH
SERIAL
DATA
I/O
PORT
DIGITAL
FILTER
-
ADC1L
48kHz/96kHz
PGA
-
ADC2L
48kHz
DIGITAL
FILTER
48kHz
DLRCLK
DBCLK
DSDATA1
DSDATA2
DSDATA3
ALRCLK
ABCLK
ASDATA1
ASDATA2
CAPL1
CAPL2
CAPR1
CAPR2
PD/RST AVDD AGND DVDD DGND
2432
MUX
PGA
-
ADC2R
48kHz
DIGITAL
FILTER
48kHz
DIGITAL
FILTER
-
DAC
DAC2L
DAC2R
VOLUME
DIGITAL
FILTER
-
DAC
DAC3L
DAC3R
FILTR
ADC1L
ADC1R
ADC2L1
ADC2L2
ADC2R1
ADC2R2
MUX
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
FILTD
48kHz/96kHz
DIGITAL
FILTER
-
ADC1R
48kHz/96kHz 48kHz/96kHz
Figure 1.
