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| Preliminary Features * * * HT82V731 Audio D/A Converter * * * * 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 Applications * * Digital audio equipment CD ROM/VCD * MPEG card General Description HT82V731 is a 16-bit digital-to-analog converter IC utilizing CMOS technology specially designed for stereo audio application. 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. Using an R-string voltage divider, this floating point expression data is then converted to analog voltage. It is compatible with TDA1311. It is available in 8-pin SOP package. Block Diagram O ut F lo a tin g D a ta C o n v e r s io n V BCK WS D IN D a ta L a tc h + O ut DD DAC + op RCH op + VDD VSS F lo a tin g D a ta C o n v e r s io n op O ut LCH DAC 1 February 1, 2000 Preliminary Pin Assignment BCK 1 8 2 7 3 6 4 5 WS D IN VSS RCH NC LCH VDD HT82V731 H T82V731 8SOP Pin Description Pin No. Pin Name 1 2 3 4 5 6 7 8 BCK WS DIN VSS VDD LCH NC RCH I/O I I I 3/4 3/4 O 3/4 O Bit serial clock input Word select input Data input Negative power supply Positive power supply Left channel output No connection Right channel output Ta=25C Test Conditions VDD 5V 5V 5V 5V 5V Conditions 3/4 1kHz, 0dB 3/4 1kHz, 0dB 1kHz, 0dB Min. 3/4 3/4 3/4 3/4 3/4 Typ. 2.5 0.12 16 82 3/4 Max. 3/4 3/4 3/4 3/4 3/4 Unit Vpp % Bit dB dB Description Electrical Characteristics Symbol VO THD DR S/N CT Parameter Maximum Output Amplitude Total Harmonic Distortion Dynamic Range Signal to Noise Ratio Cross Talk 2 February 1, 2000 Preliminary Timing Diagrams WS tr th BCK tf HT82V731 D IN LSB+1 LSB MSB M S B -1 LSB D a ta MSB MSB LSB BCK WS S a m p le O u t LEFT R IG H T Application Circuits V 10W DD + 47mF + 100nF 5 VDD RCH 8 420pF 22kW 2 .2 n F 22kW + 100pF 1 2 3 BCK WS DATA LCH VSS 4 6 H T82V731 NC 7 420pF 22kW 2 .2 n F 22kW + 100pF 3 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 O 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 |
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