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WM5621LED Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM5621LED Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 14 page  Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 email: admin@wolfson.co.uk www: http://www.wolfson.co.uk Wolfson Microelectronics Production Data data sheets contain final specifications current on publication date. Supply of products conforms to Wolfson Microelectronics standard terms and conditions © 1996 Wolfson Microelectronics Production Data Jan. 1997 Rev. 1.0 Low-power Quadruple 8-Bit DAC Description WM5621L is a quadruple 8-bit digital to analogue converter (DAC) with buffered reference inputs (high impedance). The DAC produces an output voltage that ranges between either one or two times the reference voltage and GND. The DAC is monotonic. The device operates from a single supply in the range 2.7V to 5.5V. A power-on reset function is incorporated to provide repeatable start-up conditions. A global hardware shut-down terminal and the capacity to shut-down each individual DAC with software are provided to minimize power consumption. WM5621L interfaces to all popular microcontrollers and microprocessors via a three wire serial interface with CMOS compatible, schmitt trigger, digital inputs. Alternatively a two wire serial interface can be activated. An 11-bit command word consists of eight bits of data, two DAC select bits and a range bit for selection between the times one or times two output range. The DACregisters are double buffered which allows a complete set of new values to be written to the device, and then under control of HWACT, all of the DAC outputs are simultaneously updated. Ideal in space critical applications WM5621L is available in small outline and DIP packages and is characterized for operation from -25 oC to 85oC. Features • Individual (or all) DAC's can be powered-down • One low-power 8-bit voltage output DAC • Three 8-bit voltage output DACs • Fast serial interface (1 MHz max) • Simple 2 or 3 wire interface • Programmable for 1 or 2 times output range • High impedance reference inputs for each DAC • Simultaneous update facility • Extended temperature range (-25 oC to 85oC) • Single supply operation, range 2.7 V to 5.5 V • 0 to 4 V output (x2 output range) at 5 V VDD • 0 to 2.5 V output (x2 output range) at 3 V VDD • Low power specification: All DACs on : 3.6 mW at 3.6 V typ : 6 mW at 5 V typ Low power DAC : 0.54 mW at 3.6V typ All DAC's shutdown : 0.18 mW at 3.6V typ • Guaranteed monotonic output Applications • Mobile Communications • Programmable d.c. voltage sources • Digitally controlled attenuator/amplifier • Signal synthesis • Automatic test equipment Block Diagram WM5621L |
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