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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD7856ARS датащи(PDF) 1 Page - Analog Devices |
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AD7856ARS датащи(HTML) 1 Page - Analog Devices |
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1 / 32 page  REV. A 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 AD7856 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 5 V Single Supply, 8-Channel 14-Bit 285 kSPS Sampling ADC FUNCTIONAL BLOCK DIAGRAM 4.096V REFERENCE AVDD AGND DVDD DGND CLKIN CONVST BUSY SLEEP CAL CREF2 CREF1 REFIN/REFOUT AIN8 AIN1 DIN DOUT SCLK SYNC SERIAL INTERFACE/CONTROL REGISTER BUF CHARGE REDISTRIBUTION DAC AD7856 COMP CALIBRATION MEMORY AND CONTROLLER SAR + ADC CONTROL T/H I/P MUX PRODUCT HIGHLIGHTS 1. Single 5 V supply. 2. Automatic calibration on power-up. 3. Flexible power management options including automatic power-down after conversion. 4. Operates with reference voltages from 1.2 V to VDD. 5. Analog input range from 0 V to VDD. 6. Eight single-ended or four pseudo-differential input channels. 7. Self- and system calibration. 8. Versatile serial I/O port (SPI/QSPI/8051/ µP). GENERAL DESCRIPTION The AD7856 is a high speed, low power, 14-bit ADC that oper- ates from a single 5 V power supply. The ADC powers up with a set of default conditions at which time it can be operated as a read only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and it has a number of power-down options for low power applications. The AD7856 is capable of 285 kHz throughput rate. The input track-and-hold acquires a signal in 500 ns and features a pseudo- differential sampling scheme. The AD7856 voltage range is 0 to VREF with straight binary output coding. Input signal range is to the supply and the part is capable of converting full power sig- nals to 10 MHz. CMOS construction ensures low power dissipation of typically 60 mW for normal operation and 5.1 mW in power-down mode at 10 kSPS throughput rate. The part is available in 24-lead, 0.3 inch-wide dual in-line package (DIP), 24-lead small outline (SOIC) and 24-lead small shrink outline (SSOP) packages. Please see page 31 for data sheet index. FEATURES Single 5 V Supply 285 kSPS Throughput Rate Self- and System Calibration with Autocalibration on Power-Up Eight Single-Ended or Four Pseudo-Differential Inputs Low Power: 60 mW Typ Automatic Power-Down After Conversion (2.5 W Typ) Flexible Serial Interface: 8051/SPI™/QSPI™/ P Compatible 24-Lead DIP, SOIC and SSOP Packages APPLICATIONS Battery-Powered Systems (Personal Digital Assistants, Medical Instruments, Mobile Communications) Pen Computers Instrumentation and Control Systems High Speed Modems SPI and QSPI are trademarks of Motorola, Inc. |
Аналогичный номер детали - AD7856ARS |
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Аналогичное описание - AD7856ARS |
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