Nuevo

AC ’97 SoundMAX® Codec AD1888
FEATURES
AC ’97 2.3 compatible features 6 DAC channels for 5.1 surround 90 dB dynamic range 20-bit PCM DACs S/PDIF output Integrated stereo headphone amplifiers Phone, aux, and line-in High quality CD input Selectable MIC input Mono output External amplifier power-down control Double rate audio (fS = 96 kHz) Power-management modes 48-lead LQFP and 48-lead LFCSPENHANCED FEATURES
Selectable front and rear MIC inputs with preamp Integrated PLL for system clocking Crystal-free operation Variable sample rate 7 kHz to 96 kHz Jack sense (auto topology switching) Software-controlled VREF_OUT for MIC bias Software enabled outputs for jack sharing Auto down-mix and channel spreading modes

FUNCTIONAL BLOCK DIAGRAM
MIC1 MIC2 PHONE_IN CD_L CD_R AUX_L AUX_RLINE_IN_L LINE_IN_R G M PLL DIFF AMP G M 16-BIT Σ-Δ ADC 16-BIT Σ-Δ ADC

AD1888
G

XTAL_IN

XTAL_OUT

ADC SLOT LOGIC

ID0

ID1

GA GA MONO_OUT M A M GA M GA M M GA M

GA M GA GA M M GA M

AC '97 CONTROL REGISTERS

AC '97 INTERFACE

RESET

SYNC

BIT_CLK

SDATA_OUT DAC SLOT LOGIC 20-BIT Σ-Δ DAC 20-BIT Σ-Δ DAC SPDIF TX SPDIF_OUT

SDATA_IN

LINE_OUT_L

MZ

A M GALINE_OUT_R

MZ

A M GA

M CENTER_OUT MZ A

M

M

M

M

M M GA 20-BIT Σ-Δ DAC 20-BIT Σ-Δ DAC

EAPD

EAPD

LFE_OUT

MZ

A M G = GAIN A = ATTENUATION M = MUTE Z = HIGH-Z M GA GA

JACK SENSE LOGIC VOLTAGE REFERENCE

JS0 JS1

VREF VREFOUT
04294-001

SURR_L/ HP_OUT_L SURR_R/ HP_OUT_R

HP

M

A

20-BIT Σ-Δ DAC 20-BIT Σ-Δ DAC

HP

M

A M GA

Figure 1.Rev. A 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 that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of AnalogDevices. Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2005 Analog Devices, Inc. All rights reserved.

AD1888 TABLE OF CONTENTS
Specifications..................................................................................... 3 TestConditions............................................................................. 3 Timing Parameters ........................................................................... 6 Absolute Maximum Ratings............................................................ 8 Environmental Conditions.......................................................... 8 ESDCaution.................................................................................. 8 Pin Configuration and Function Descriptions..............................9 Outline Dimensions ....................................................................... 31 Ordering Guide .......................................................................... 31

REVISION HISTORY
8/05—Rev. 0 to Rev. A Updated Outline Dimensions....................................................... 31 Changes to Ordering Guide .......................................................... 31 10/03—Revision 0: Initial Version

Rev. A | Page 2 of 32

AD1888 SPECIFICATIONS
TEST CONDITIONS
Standard Test Conditions
Unless otherwise noted: • Temperature • Digital Supply (DVDD) • Analog Supply (AVDD) • Sample Rate (fS) • Input Signal • Analog Output Pass Band25°C 3.3 V 5.0 V 48 kHz 1 kHz 20 Hz to 20 kHz

DAC Test Conditions
• • • • • • • • Calibrated −3 dB attenuation relative to full scale 0 dB input 10 kΩ output load LINE_OUT, MONO_OUT, CENTER_OUT, and LFE_OUT 32 Ω output load (HP_OUT) Calibrated 0 dB gain Input −3.0 dB relative to full scale Min Typ Max Unit

ADC Test Conditions

Table 1.
Parameter ANALOG INPUT Input Voltage (RMS Values...