a
FEATURES
5 V Stereo Audio DAC System
Accepts 16-Bit/18-Bit/20-Bit/24-Bit Data
Supports 24 Bits, 192 kHz Sample Rate
Accepts a Wide Range of Sample Rates Including:
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, and
192 kHz
Multibit Sigma-Delta Modulator with “Perfect
Differential Linearity Restoration” for Reduced Idle
Tones and Noise Floor
Data-Directed Scrambling DAC—Least Sensitive to
Jitter
Differential Output for Optimum Performance
117 dB Signal-to-Noise (Not Muted) at 48 kHz Sample
Rate (A-Weighted Mono)
114 dB Signal-to-Noise (Not Muted) at 48 kHz Sample
Rate (A-Weighted Stereo)
117 dB Dynamic Range (Not Muted) at 48 kHz Sample
Rate (A-Weighted Mono)
114 dB Dynamic Range (Not Muted) at 48 kHz Sample
Rate (A-Weighted Stereo)
–105 dB THD+N (Mono Application Circuit)
–102 dB THD+N (Stereo)
115 dB Stopband Attenuation
On-Chip Clickless Volume Control
Hardware and Software Controllable Clickless Mute
Serial (SPI) Control for: Serial Mode, Number of Bits,
Sample Rate, Volume, Mute, De-Emp
Digital De-Emphasis Processing for 32 kHz, 44.1 kHz,
48 kHz Sample Rates
Clock Autodivide Circuit Supports Five Master-Clock
Frequencies
Stereo, 24-Bit, 192 kHz
Multibit
Σ∆
DAC
AD1852*
Flexible Serial Data Port with Right-Justified, Left-
Justified, I
2
S-Compatible and DSP Serial Port Modes
28-Lead SSOP Plastic Package
APPLICATIONS
Hi End: DVD, CD, Home Theater Systems, Automotive
Audio Systems, Sampling Musical Keyboards, Digital
Mixing Consoles, Digital Audio Effects Processors
PRODUCT OVERVIEW
The AD1852 is a complete high performance single-chip stereo
digital audio playback system. It is comprised of a multibit sigma-
delta modulator, digital interpolation filters, and analog output
drive circuitry. Other features include an on-chip stereo attenuator
and mute, programmed through an SPI-compatible serial control
port. The AD1852 is fully compatible with all known DVD
formats including 192 kHz as well as 96 kHz sample frequen-
cies and 24 bits. It also is backwards compatible by supporting
50
µs/15 µs
digital de-emphasis intended for “Redbook” compact
discs, as well as de-emphasis at 32 kHz and 48 kHz sample rate.
The AD1852 has a very simple but very flexible serial data input
port that allows for glueless interconnection to a variety of ADCs,
DSP chips, AES/EBU receivers and sample rate converters. The
AD1852 can be configured in left-justified, I
2
S, right-justified,
or DSP serial port compatible modes. It can support 16, 18, 20,
and 24 bits in all modes. The AD1852 accepts serial audio data
in MSB first, twos-complement format. The AD1852 oper-
ates from a single 5 V power supply. It is fabricated on a single
monolithic integrated circuit and is housed in a 28-lead SSOP
package for operation over the temperature range 0°C to 70°C.
FUNCTIONAL BLOCK DIAGRAM
CONTROL DATA
INPUT
VOLUME
MUTE
3
DIGITAL
SUPPLY
2
CLOCK
IN
AD1852
16-/18-/20-/24-BIT
DIGITAL
DATA INPUT
SERIAL
MODE
2
ATTEN/
MUTE
8 F
S
INTERPOLATOR
SERIAL CONTROL
INTERFACE
MULTIBIT SIGMA-
DELTA MODULATOR
VOLTAGE
REFERENCE
AUTO-CLOCK
DIVIDE CIRCUIT
DAC
ANALOG
OUTPUTS
SERIAL
DATA
INTERFACE
ATTEN/
MUTE
8 F
S
INTERPOLATION
MULTIBIT SIGMA-
DELTA MODULATOR
DAC
2
RESET
MUTE
DE-EMPHASIS
ANALOG
SUPPLY
2
ZERO
FLAG
*Patents
Pending
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000
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