HT82V731 Audio D/A Converter Preliminary Features · · · CMOS technology Low power consumption Two voltage output channel in the same chip · · · · 16-bit dynamic range Low total harmonic distortion 5 voltage single power supply 8-pin SOP package · MPEG card Applications · · Digital audio equipment CD ROM/VCD General Description HT82V731 is a 16-bit digital-to-analog converter IC utilizing CMOS technology specially designed for stereo audio application. Using an R-string voltage divider, this floating point expression data is then converted to analog voltage. HT82V731 converts the 16 bits serial data into an analog output voltage. The digital data is internally converted to floating point expression whose format consists of 10 bits mantissa and 7step exponent. It is compatible with TDA1311. It is available in 8-pin SOP package. Block Diagram F lo a tin g D a ta C o n v e r s io n V + o p D A C O u t R C H D D B C K W S D a ta L a tc h + D IN o p O u t + V D D V S S F lo a tin g D a ta C o n v e r s io n o p O u t L C H D A C 1 February 1, 2000 Preliminary HT82V731 Pin Assignment B C K 1 8 R C H W S 2 7 N C D IN 3 6 L C H V S S 4 5 V D D H T 8 2 V 7 3 1 8 S O P Pin Description Pin No. Pin Name I/O Description 1 BCK I Bit serial clock input 2 WS I Word select input 3 DIN I Data input 4 VSS ¾ Negative power supply 5 VDD ¾ Positive power supply 6 LCH O Left channel output 7 NC ¾ No connection 8 RCH O Right channel output Electrical Characteristics Symbol Parameter Ta=25°C Test Conditions VDD Conditions ¾ Min. Typ. Max. Unit ¾ 2.5 ¾ Vpp ¾ 0.12 ¾ % ¾ 16 ¾ Bit VO Maximum Output Amplitude 5V THD Total Harmonic Distortion 5V DR Dynamic Range 5V S/N Signal to Noise Ratio 5V 1kHz, 0dB ¾ 82 ¾ dB CT Cross Talk 5V 1kHz, 0dB ¾ ¾ ¾ dB 1kHz, 0dB ¾ 2 February 1, 2000 Preliminary HT82V731 Timing Diagrams W S tr th tf B C K D IN L S B + 1 L S B M S B M S B -1 L S B L S B M S B D a ta M S B B C K L E F T W S R IG H T S a m p le O u t Application Circuits V 1 0 W D D + 4 7 m F + 1 0 0 n F 4 2 0 p F 5 1 V D D R C H 2 2 k W 8 2 3 W S 1 0 0 p F 2 .2 n F B C K H T 8 2 V 7 3 1 7 N C D A T A L C H + 2 2 k W 4 2 0 p F 2 2 k W 6 V S S 2 .2 n F 4 3 2 2 k W + 1 0 0 p F February 1, 2000 Preliminary HT82V731 Holtek Semiconductor Inc. (Headquarters) No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Hong Kong) Ltd. RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Copyright Ó 2000 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. 4 February 1, 2000