Stereo, 24-Bit, 192 kHz,

Multibit, Sigma-Delta DAC

AD1852

Rev. A

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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 Σ-Δ 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 stop-band 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

Flexible serial data port with right-justified, left-justified,

28-Lead SSOP plastic package

APPLICATIONS

High end

DVDs, CDs, home theater systems, automotive, audio

systems, sampling musical keyboards, digital mixing

consoles, and digital audio effects processors

GENERAL DESCRIPTION

The AD1852 is a complete, high performance, single-chip, stereo

digital, audio playback system. It is comprised of a multibit, Σ-Δ

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 frequencies

and 24 bits. It is also backwards compatible by supporting

50 μs/15 μs digital de-emphasis intended for Red Book 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

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 operates

from a single 5 V power supply. It is fabricated on a single,

monolithic integrated circuit and is housed in a 28-lead SSOP

for operation over the 0°C to 70°C temperature range.

FUNCTIONAL BLOCK DIAGRAM

SERIAL

DATA

INTERFACE

8 ×

INTERPOLATOR

SERIAL CONTROL

INTERFACE

AUTO-CLOCK

DIVIDE CIRCUIT

VOLUME

MUTE

CONTROL DATA

INPUT

3

2

DIGITAL

SUPPLY

CLOCK

IN

ANALOG

OUTPUTS

2

2

ZERO

FLAG

ANALOG

SUPPLY

DE-EMPHASIS

MUTE

2

SERIAL

MODE

16-/18-/20-/24-BIT

DIGITAL

DATA INPUT

AD1852

MULTIBIT SIGMA-

DELTA MODULATOR

ATTEN/

MUTE

VOLTAGE

REFERENCE

DAC

8 ×

INTERPOLATOR

MULTIBIT SIGMA-

DELTA MODULATOR

ATTEN/

MUTE

DAC

RESET

Figure 1.