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AD7617BSTZ Datasheet(PDF) 1 Page - Analog Devices |
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AD7617BSTZ Datasheet(HTML) 1 Page - Analog Devices |
1 / 52 page 16-Channel DAS with 14-Bit, Bipolar Input, Dual Simultaneous Sampling ADC Data Sheet AD7617 Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©2017 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 16-channel, dual, simultaneously sampled inputs Independently selectable channel input ranges True bipolar: ±10 V, ±5 V, ±2.5 V Single 5 V analog supply and 2.3 V to 3.6 V VDRIVE supply Fully integrated data acquisition solution Analog input clamp protection Input buffer with 1 MΩ analog input impedance First-order antialiasing analog filter On-chip accurate reference and reference buffer Dual 14-bit SAR ADC Throughput rate: 2× 1 MSPS per channel pair Oversampling capability with digital filter Flexible sequencer with burst mode Flexible parallel/serial interface SPI/QSPI/MICROWIRE/DSP compatible Optional CRC error checking Hardware/software configuration Performance 85.3 dB typical SNR at 500 kSPS (2× oversampling) 85 dB typical SNR at 1 MSPS −103 dB typical THD at ±10 V range ±0.3 LSB INL (typical), ±0.99 LSB DNL (maximum) 8 kV ESD analog input pins only On-chip self detect function 80-lead LQFP package APPLICATIONS Power line monitoring Protective relays Multiphase motor control Instrumentation and control systems Data acquisition systems (DASs) GENERAL DESCRIPTION The AD7617 is a 14-bit, DAS that supports dual simultaneous sampling of 16 channels. The AD7617 operates from a single +5 V supply and can accommodate ±10 V, ±5 V, and ±2.5 V true bipolar input signals while sampling at throughput rates up to 1 MSPS per channel pair with 85 dB signal-to-noise ratio (SNR). Higher SNR performance can be achieved with the on-chip oversampling mode (85.3 dB for an oversampling ratio (OSR) of 2). The input clamp protection circuitry can tolerate voltages up to ±21 V. The AD7617 has 1 MΩ analog input impedance, regardless of sampling frequency. The single-supply operation, on-chip filtering, and high input impedance eliminate the need for driver op amps and external bipolar supplies. The device contains analog input clamp protection, a dual, 14-bit charge redistribution successive approximation register (SAR) analog-to-digital converter (ADC), a flexible digital filter, a 2.5 V reference and reference buffer, and high speed serial and parallel interfaces. The AD7617 is serial peripheral interface (SPI)/QSPI™/DSP/MICROWIRE compatible. FUNCTIONAL BLOCK DIAGRAM Figure 1. AD7617 Functional Block Diagram RFB 1MΩ 1MΩ RFB FIRST- ORDER LPF RFB 1MΩ 1MΩ RFB FIRST- ORDER LPF V0A V0AGND RFB 1MΩ 1MΩ RFB V7A V7AGND V0B V0BGND V7B V7BGND 9:1 MUX BUSY CONVST CONTROL INPUTS CLK OSC REFINOUT REFSEL SER/PAR SER1W OSR DIGITAL FILTER 2.5V REF REFCAP NOTES 1. MULTIFUNCTION PINS, SUCH AS DB15/OS2, ARE REFERRED TO BY A SINGLE FUNCTION OF THE PIN, FOR EXAMPLE, DB15, WHEN ONLY THAT FUNCTION IS RELEVANT. REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION FOR MORE INFORMATION. SERIAL REGCAP REGCAPD 1.8V DLDO VCC AD7617 9:1 MUX 14-BIT SAR 14-BIT SAR OS2 TO OS0 VDRIVE VCC ALDO 2:1 MUX HW_RNGSEL0, HW_RNGSEL1 CHSEL2 TO CHSEL0 SEQEN FLEXIBLE SEQUENCER BURST RESET AGND DGND DB15 TO DB0 SDOx/SDI PARALLEL FIRST- ORDER LPF RFB 1MΩ 1MΩ RFB FIRST- ORDER LPF 1.8V ALDO CLAMP CLAMP CLAMP CLAMP CLAMP CLAMP CLAMP CLAMP |
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