Datasheet AD7651 (Analog Devices)

16-Bit 100 kSPS PulSARTM Unipolar ADC with Reference AD7651
FEATURES FUNCTIONAL BLOCK DIAGRAM Throughput: 100 kSPS REFBUFIN REF REFGND DVDD DGND 16-bit resolution AGND OVDD Analog input voltage range: 0 V to 2.5 V AD7651 AVDD SERIAL OGND No pipeline delay REF PORT Parallel and serial 5 V/3 V interface 16 IN SWITCHED DATA[15:0] SPI®/QSPITM/MICROWIRETM/DSP compatible CAP DAC INGND BUSY Single 5 V supply operation PARALLEL PDREF INTERFACE RD Power dissipation PDBUF CLOCK C S 16 mW typ, 160 µW @ 1 kSPS without REF PD CONTROL LOGIC AND SER/P A R RESET 38 mW typ with REF CALIBRATION CIRCUITRY OB/2 C 48-lead LQFP and 48-lead LFCSP packages BYTESWAP Pin-to-pin compatible with PulSAR ADCs CN V S T
02964-0-001
APPLICATIONS
Figure 1. Functional Block Diagram
Data acquisition Instrumentation Table 1. PulSAR Selection Digital signal processing 800– Spectrum analysis Type/kSPS 100–250 500–570 1000 Medical instruments
Pseudo- AD7651 AD7650/AD7652 AD7653 Differential
Battery-powered systems
AD7660/AD7661 AD7664/AD7666 AD7667
Process control
True Bipolar AD7663 AD7665 AD7671 True AD7675 AD7676 AD7677 Differential
GENERAL DESCRIPTION
18-Bit AD7678 AD7679 AD7674 The AD7651 is a 16-bit, 100 kSPS, charge redistribution SAR Multichannel/ AD7654 analog-to-digital converter that operates from a single 5 V Simultaneous AD7655 power supply. The part contains a high speed 16-bit sampling ADC, an internal conversion clock, internal reference, error
PRODUCT HIGHLIGHTS
correction circuits, and both serial and parallel system inter- 1. Fast Throughput. face ports. The AD7651 is a 100 kSPS, charge redistribution, 16-bit The AD7651 is fabricated using Analog Devices’ high perform- SAR ADC with internal error correction circuitry. ance, 0.6 micron CMOS process, with correspondingly low cost, 2. Internal Reference. and is available in a 48-lead LQFP and a tiny 48-lead LFCSP The AD7651 has an internal reference with a typical with operation specified from –40°C to +85°C. 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. or otherwise under any patent or patent rights of Analog Devices. Trademarks and Tel: 781.329.4700 www.analog.com registered trademarks are the property of their respective owners. Fax: 781.326.8703 © 2003 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION AND FUNCTION DESCRIPTIONS DEFINITIONS OF SPECIFICATIONS TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION TYPICAL CONNECTION DIAGRAM POWER DISSIPATION VERSUS THROUGHPUT CONVERSION CONTROL DIGITAL INTERFACE PARALLEL INTERFACE SERIAL INTERFACE MASTER SERIAL INTERFACE SLAVE SERIAL INTERFACE MICROPROCESSOR INTERFACING APPLICATION HINTS BIPOLAR AND WIDER INPUT RANGES LAYOUT EVALUATING THE AD7651’S PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE