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AD7656A-1BSTZ-RL Datasheet(PDF) 1 Page - Analog Devices |
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AD7656A-1BSTZ-RL Datasheet(HTML) 1 Page - Analog Devices |
1 / 29 page 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 16-Bit ADC Data Sheet AD7656A-1 FEATURES Pin and software compatible with the AD7656A featuring reduced decoupling requirements 6 independent analog-to-digital converters (ADCs) True bipolar analog inputs Pin-/software-selectable ranges: ±10 V or ±5 V Fast throughput rate: 250 kSPS i CMOS process technology Low power: 140 mW at 250 kSPS with 5 V supplies High noise performance with wide bandwidth 88 dB SNR at 10 kHz input frequency On-chip reference and reference buffers High speed parallel, serial, and daisy-chain interface modes High speed serial interface Serial peripheral interface (SPI)/QSPI™/MICROWIRE®/DSP compatible Power-down mode: 315 µW maximum 64-lead LQFP Built-in power supply sequencing (PSS) robustness solution APPLICATIONS Power line monitoring and measuring systems Instrumentation and control systems Multiaxis positioning systems FUNCTIONAL BLOCK DIAGRAM VSS DGND VDD REF CONVST A CONVST B CONVST C OUTPUT DRIVERS OUTPUT DRIVERS OUTPUT DRIVERS OUTPUT DRIVERS CONTROL LOGIC BUF BUF BUF AGND T/H T/H T/H T/H T/H T/H CLK OSC AVCC DVCC V1 V2 V3 V4 V5 V6 SER/PAR SEL CS VDRIVE STBY DB8/DOUT A DB9/DOUT B DB10/DOUT C DB6/SCLK RD WR/REFEN/DIS DATA/ CONTROL LINES AD7656A-1 16-BIT SAR 16-BIT SAR 16-BIT SAR 16-BIT SAR 16-BIT SAR 16-BIT SAR Figure 1. GENERAL DESCRIPTION The AD7656A-11 is a reduced decoupling pin- and software- compatible version of AD7656A. The AD7656A-1 contains six 16-bit, fast, low power successive approximation ADCs in a package designed on the iCMOS® process (industrial CMOS). i CMOS is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies. It enables the development of a wide range of high performance analog ICs, capable of 33 V operation in a footprint that no previous generation of high voltage devices could achieve. Unlike analog ICs using conventional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, which dramatically reduces power consumption and package size. The AD7656A-1 features throughput rates of to 250 kSPS. It contains wide bandwidth (4.5 MHz), track-and-hold amplifiers that can handle input frequencies up to 4.5 MHz. The conversion process and data acquisition are controlled using the CONVST x signals and an internal oscillator. Three CONVST x pins (CONVST A, CONVST B, and CONVST C) allow independent, simultaneous sampling of the three ADC pairs. The AD7656A-1 has a high speed parallel and serial interface, allowing the device to interface with microprocessors or digital signal processors (DSPs). In serial interface mode, the AD7656A-1 has a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656A-1 can accommodate true bipolar input signals in the ±4 × VREF range and the ±2 × VREF range. The AD7656A-1 also contains an on-chip 2.5 V reference. Multifunction pin names may be referenced by their relevant function only. PRODUCT HIGHLIGHTS 1. Six 16-bit, 250 kSPS ADCs on board. 2. Six true bipolar, high impedance analog inputs. 3. High speed parallel and serial interfaces. 4. Reduced decoupling requirements and reduced bill of materials cost compared with the AD7656A. 1 Protected by U.S. Patent No. 6,731,232. Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com |
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