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AD7616BSTZ Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD7616BSTZ Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 51 page 16-Channel DAS with 16-Bit, Bipolar Input, Dual Simultaneous Sampling ADC Data Sheet AD7616 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 ©2016 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 V DRIVE 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 16-bit successive approximation register (SAR) ADC Throughput rate: 2 × 1 MSPS Oversampling capability with digital filter Flexible sequencer with burst mode Flexible parallel/serial interface SPI/QSPI/MICROWIRE/DSP compatible Optional cyclic redundancy check (CRC) error checking Hardware/software configuration Performance 92 dB SNR at 500 kSPS (2× oversampling) 90.5 dB SNR at 1 MSPS −103 dB THD ±1 LSB INL (typical), ±0.99 LSB DNL (maximum) 8 kV ESD rating on analog input channels 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 AD7616 is a 16-bit, DAS that supports dual simultaneous sampling of 16 channels. The AD7616 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 90.5 dB SNR. Higher SNR performance can be achieved with the on-chip oversampling mode (92 dB for an oversampling ratio (OSR) of 2). The input clamp protection circuitry can tolerate voltages up to ±21 V. The AD7616 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, 16-bit charge redistribution 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 AD7616 is serial peripheral interface (SPI)/QSPI™/DSP/ MICROWIRE compatible FUNCTIONAL BLOCK DIAGRAM Figure 1. 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 AD7616 9:1 MUX 16-BIT SAR 16-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 PARALLEL/ SERIAL INTERFACE CLAMP CLAMP CLAMP CLAMP CLAMP CLAMP CLAMP CLAMP |
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