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AD7851ARZ датащи(PDF) 1 Page - Analog Devices |
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AD7851ARZ датащи(HTML) 1 Page - Analog Devices |
1 / 36 page a AD7851 FUNCTIONAL BLOCK DIAGRAM AIN (+) AIN (–) CREF1 CREF2 CAL AVDD AGND AGND DVDD DGND AMODE CLKIN SLEEP CONVST BUSY SYNC SM1 SM2 DIN DOUT SCLK POLARITY CHARGE REDISTRIBUTION DAC COMP 4.096V REFERENCE AD7851 BUF T/H SAR + ADC CONTROL CALIBRATION MEMORY AND CONTROLLER SERIAL INTERFACE/CONTROL REGISTER REFIN/ REFOUT 14-Bit 333 kSPS Serial A/D Converter FEATURES Single 5 V Supply 333 kSPS Throughput Rate/ 2 LSB DNL—A Grade 285 kSPS Throughput Rate/ 1 LSB DNL—K Grade A and K Grades Guaranteed to 125 C/238 kSPS Throughput Rate Pseudo-Differential Input with Two Input Ranges System and Self-Calibration with Autocalibration on Power-Up Read/Write Capability of Calibration Data Low Power: 60 mW Typ Power-Down Mode: 5 W Typ Power Consumption Flexible Serial Interface: 8051/SPI®/QSPI™/ P Compatible 24-Lead PDIP, SOIC, and SSOP Packages APPLICATIONS Digital Signal Processing Speech Recognition and Synthesis Spectrum Analysis DSP Servo Control Instrumentation and Control Systems High Speed Modems Automotive GENERAL DESCRIPTION The AD7851 is a high speed, 14-bit ADC that operates 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 has a number of power-down options for low power applications. The AD7851 is capable of a 333 kHz throughput rate. The input track-and-hold acquires a signal in 0.33 µs and features a pseudo-differential sampling scheme. The AD7851 has the added advantage of two input voltage ranges (0 V to VREF and –VREF/2 to +VREF/2 centered about VREF/2). Input signal range is to VDD and the part is capable of converting full power signals to 20 MHz. CMOS construction ensures low power dissipation (60 mW typ) with power-down mode (5 µW typ). The part is available in a 24-lead, 0.3 inch-wide PDIP, a 24-lead SOIC, and a 24-lead SSOP package. PRODUCT HIGHLIGHTS 1. Single 5 V supply. 2. Operates with reference voltages from 4 V to VDD. 3. Analog input ranges from 0 V to VDD. 4. System and self-calibration including power-down mode. 5. Versatile serial I/O port. REV. B One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2004 Analog Devices, Inc. All rights reserved. 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 that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. |
Аналогичный номер детали - AD7851ARZ |
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Аналогичное описание - AD7851ARZ |
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