AD7616 DATA ACQUISITION SYSTEM A new solution for smart grid distribution equipment that achieves high accuracy while simplifying development and reducing system cost. Accuracy Applications XX XX XX XX XX Power line monitoring Relay protection for low voltage DTUs and FTUs Multiphase motor control Instrumentation and control systems Data acquisition systems The AD7616 can easily achieve Class 0.2 measurement accuracy because its on-chip ADCs have 90 dB of SNR. Higher SNR performance of 92 dB can be achieved by using the on-chip oversampling mode. Simplicity The AD7616 is a 16-bit, data acquisition system that supports dual simultaneous sampling of 16 channels. This input scheme simplifies system design by removing phase shift associated with voltage and current channels. In addition, it operates from a single 5 V supply, which simplifies the power supply design work. Reduced System Cost The AD7616 is a 16-channel data acquisition system (DAS) that is highly integrated and can accept a variety of input signal ranges (±10 V, ±5 V, ±2.5 V). The analog front end features a 1 MΩ, high impedance, very low drift, input buffer. This eliminates the need for external protection circuits or external signal conditioning ICs, greatly minimizing the system cost and bill of material. Visit analog.com/energy General Description Features The AD7616 is a 16-bit DAS designed for a variety of transmission and distribution applications, including power line monitoring, relay protection for low voltage, distribution terminal units (DTUs), and feeder terminal units (FTUs). It supports dual simultaneous sampling of 16 channels and operates from a single 5 V supply. The AD7616 can accommodate ±10 V, ±5 V, and ±2.5 V true bipolar input signals while sampling at throughput rates up to 2 × 1 MSPS per channel pair with 90 dB SNR. It 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. Each part contains analog input clamp protection, a dual, 16-bit, charge redistribution successive approximation analog-to-digital converter (ADC), a flexible digital filter, a 2.5 V reference and reference buffer, and high speed serial and parallel interfaces. VCC V0A Clamp V0AGND Clamp V7A Clamp V7AGND Clamp V0B Clamp V0BGND Clamp V7B Clamp V7BGND Clamp 1 MΩ 1 MΩ 1 MΩ 1 MΩ 1 MΩ 1 MΩ 1 MΩ 1 MΩ XX XX XX XX XX XX XX XX XX VCC + – REFCAP REFINOUT RFB XX XX XX XX XX XX XX XX XX XX Dual, 16-bit, 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 CRC error checking Hardware/software configuration On-chip self-detect function 80-lead LQFP package REFSEL REGCAP REGCAPD VDRIVE RFB 2.5 V REF FirstOrder LPF 1.8 V ALDO 9:1 Mux + – + – + – RFB FirstOrder LPF RFB OSR Digital Filter Parallel/ Serial Interface SDO/SDI SER/PAR SER1W Parallel DB [15:0] OS [2:0] 9:1 Mux RFB RFB 16-Bit SAR FirstOrder LPF FirstOrder LPF Reset Burst Flexible Sequencer SEQEN Control Inputs 2:1 Mux ALDO AGND 16-Bit SAR RFB 1.8 V DLDO Serial RFB VCC AD7616 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 5.25 V VDRIVE 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 HW_RNGSEL [1:0] CHSEL [2:0] CLK OSC Busy CONVST AGND DGND Analog Devices, Inc. Worldwide Headquarters Analog Devices, Inc. Europe Headquarters Analog Devices, Inc. Japan Headquarters Analog Devices, Inc. Asia Pacific Headquarters Analog Devices, Inc. One Technology Way P.O. Box 9106 Norwood, MA 02062-9106 U.S.A. Tel: 781.329.4700 (800.262.5643, U.S.A. only) Fax: 781.461.3113 Analog Devices, Inc. Wilhelm-Wagenfeld-Str. 6 80807 Munich Germany Tel: 49.89.76903.0 Fax: 49.89.76903.157 Analog Devices, KK New Pier Takeshiba South Tower Building 1-16-1 Kaigan, Minato-ku, Tokyo, 105-6891 Japan Tel: 813.5402.8200 Fax: 813.5402.1064 Analog Devices 5F, Sandhill Plaza 2290 Zuchongzhi Road Zhangjiang Hi-Tech Park Pudong New District Shanghai, China 201203 Tel: 86.21.2320.8000 Fax: 86.21.2320.8222 ©2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Ahead of What’s Possible is a trademark of Analog Devices. PH13732-0-10/15 analog.com