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AD7302BR датащи(PDF) 1 Page - Analog Devices |
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AD7302BR датащи(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 AD7302 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 Dual Voltage Output 8-Bit DAC FUNCTIONAL BLOCK DIAGRAM POWER ON RESET CS WR D0 REFIN VDD AD7302 VOUTA DGND D7 AGND A/B CLR LDAC PD I/V VOUTB MUX ÷2 INPUT REGISTER DAC REGISTER I DAC A DAC REGISTER I DAC B I/V INPUT REGISTER CONTROL LOGIC FEATURES Two 8-Bit DACs In One Package 20-Lead DIP/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 3 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 AD7302 is a dual, 8-bit voltage out DAC that operates from a single +2.7 V to +5.5 V supply. Its on-chip precision output buffers allow the DAC outputs to swing rail to rail. The AD7302 has a parallel microprocessor and DSP-compatible interface with high speed registers and double buffered interface logic. Data is loaded to the registers on the rising edge of CS or WR and the A/B pin selects either DAC A or DAC B. Reference selection for AD7302 can be either an internal reference derived from the VDD or an external reference applied at the REFIN pin. Both DACs can be simultaneously updated using the asynchronous LDAC input and 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 10 mW at 3.3 V, reducing to 3 µW in power- down mode. The AD7302 is available in a 20-pin plastic dual-in-line package, 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 typically consumes 15 mW at 5 V, making it ideal for battery powered applications. 2. The on-chip output buffer amplifiers allow the outputs of the DACs 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 DIP, SOIC and TSSOP packages. |
Аналогичный номер детали - AD7302BR |
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Аналогичное описание - AD7302BR |
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