Datenblatt-Suchmaschine für elektronische Bauteile |
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AD7801BR Datenblatt(PDF) 1 Page - Analog Devices |
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AD7801BR Datenblatt(HTML) 1 Page - Analog Devices |
1 / 16 page REV. 0 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD7801 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997 +2.7 V to +5.5 V, Parallel Input, Voltage Output 8-Bit DAC FUNCTIONAL BLOCK DIAGRAM INPUT REGISTER DAC REGISTER I DAC ÷2 POWER-ON RESET AD7801 VOUT AGND PD CLR LDAC REFIN VDD DGND D7 D0 WR CS I/V MUX CONTROL LOGIC FEATURES Single 8-Bit DAC 20-Pin SOIC/TSSOP Package +2.7 V to +5.5 V Operation Internal and External Reference Capability DAC Power-Down Function Parallel Interface On-Chip Output Buffer Rail-to-Rail Operation Low Power Operation 1.75 mA max @ 3.3 V Power-Down to 1 A max @ 25 C APPLICATIONS Portable Battery Powered Instruments Digital Gain and Offset Adjustment Programmable Voltage and Current Sources Programmable Attenuators GENERAL DESCRIPTION The AD7801 is a single, 8-bit, voltage out DAC that operates from a single +2.7 V to +5.5 V supply. Its on-chip precision output buffer allows the DAC output to swing rail to rail. The AD7801 has a parallel microprocessor and DSP compatible interface with high speed registers and double buffered interface logic. Data is loaded to the input register on the rising edge of CS or WR. Reference selection for the AD7801 can be either an internal reference derived from the VDD or an external reference applied at the REFIN pin. The output of the DAC can be cleared by using the asynchronous CLR input. The low power consumption of this part makes it ideally suited to portable battery operated equipment. The power consump- tion is less than 5 mW at 3.3 V, reducing to less than 3 µW in power-down mode. The AD7801 is available in a 20-lead SOIC and a 20-lead TSSOP package. PRODUCT HIGHLIGHTS 1. Low Power, Single Supply operation. This part operates from a single +2.7 V to +5.5 V supply and consumes typically 5 mW at 3 V, making it ideal for battery powered applications. 2. The on-chip output buffer amplifier allows the output of the DAC to swing rail to rail with a settling time of typically 1.2 µs. 3. Internal or external reference capability. 4. High speed parallel interface. 5. Power-down capability. When powered down the DAC consumes less than 1 µA at 25°C. 6. Packaged in 20-lead SOIC and TSSOP packages. |
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Ähnliche Beschreibung - AD7801BR |
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