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AD7651 Datasheet(PDF) 1 Page - Analog Devices |
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AD7651 Datasheet(HTML) 1 Page - Analog Devices |
1 / 28 page 16-Bit 100 kSPS PulSARTM Unipolar ADC with Reference AD7651 FEATURES Throughput: 100 kSPS 16-bit resolution Analog input voltage range: 0 V to 2.5 V No pipeline delay Parallel and serial 5 V/3 V interface SPI ®/QSPITM/MICROWIRETM/DSP compatible Single 5 V supply operation Power dissipation 16 mW typ, 160 µW @ 1 kSPS without REF 38 mW typ with REF 48-lead LQFP and 48-lead LFCSP packages Pin-to-pin compatible with PulSAR ADCs APPLICATIONS Data acquisition Instrumentation Digital signal processing Spectrum analysis Medical instruments Battery-powered systems Process control GENERAL DESCRIPTION The AD7651 is a 16-bit, 100 kSPS, charge redistribution SAR analog-to-digital converter that operates from a single 5 V power supply. The part contains a high speed 16-bit sampling ADC, an internal conversion clock, internal reference, error correction circuits, and both serial and parallel system inter- face ports. The AD7651 is fabricated using Analog Devices’ high perform- ance, 0.6 micron CMOS process, with correspondingly low cost, and is available in a 48-lead LQFP and a tiny 48-lead LFCSP with operation specified from –40°C to +85°C. FUNCTIONAL BLOCK DIAGRAM 02964-0-001 SWITCHED CAP DAC 16 CONTROL LOGIC AND CALIBRATION CIRCUITRY CLOCK AD7651 DATA[15:0] BUSY RD CS SER/P A R OB/2 C OGND OVDD DGND DVDD AVDD AGND REF REFGND IN INGND PD RESET SERIAL PORT PARALLEL INTERFACE CN VST REF REFBUFIN PDBUF PDREF BYTESWAP Figure 1. Functional Block Diagram Table 1. PulSAR Selection Type/kSPS 100–250 500–570 800– 1000 Pseudo- Differential AD7651 AD7660/AD7661 AD7650/AD7652 AD7664/AD7666 AD7653 AD7667 True Bipolar AD7663 AD7665 AD7671 True Differential AD7675 AD7676 AD7677 18-Bit AD7678 AD7679 AD7674 Multichannel/ Simultaneous AD7654 AD7655 PRODUCT HIGHLIGHTS 1. Fast Throughput. The AD7651 is a 100 kSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. 2. Internal Reference. The AD7651 has an internal reference with a typical temperature drift of 7 ppm/°C. 3. Single-Supply Operation. The AD7651 operates from a single 5 V supply. Its power dissipation decreases with throughput. 4. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangement is compatible with both 3 V and 5 V logic. 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 that may result from its use. Specifications subject to change without notice. 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. 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 © 2003 Analog Devices, Inc. All rights reserved. |
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