Key Sheet AD7792, AD7793 (Analog Devices)

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Key Sheet AD7792/AD7793 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Highlights of the AD7792/ AD7793— 3-Channel, Low Noise, Low Power, 16-/24-Bit Sigma-Delta ADCs with On-Chip In-Amp and Reference GND AVDD REFIN(+)/AIN3(+) REFIN(–)/AIN3(–) VBIAS BAND GAP REFERENCE GND AVDD AIN1(+) DOUT/RDY AIN1(–) SERIAL MUX INTERFACE DIN AIN2(+) Σ-Δ BUF IN-AMP AND ADC AIN2(–) SCLK CONTROL LOGIC CS AVDD GND DVDD IOUT1 INTERNAL AD7792: 16-BIT CLOCK AD7793: 24-BIT IOUT2
001
CLK
11263- Figure 1. Functional Block Diagram
GENERAL DESCRIPTION FEATURES AND BENEFITS
This key sheet1 provides users with an overview of the AD7792/ The AD7792/AD7793 offer the following features and benefits: AD7793. Key attributes of the parts include the following: • Simultaneous 50 Hz and 60 Hz rejection at 16.7 SPS ODR • Designed for the measurement of wide dynamic range, • Programmable gains of 1, 2, 4, 8, 16, 32, 64, and 128 low frequency signals, such as those in thermocouple and • Internal and system calibration on chip resistance temperature detector (RTD) measurements, gas • Option of 64 kHz internal clock or external clock analysis, industrial process control, blood analysis, and • Ultralow noise performance across the ODR range portable instrumentation. • Fully compatible with SPI, QSPI™, MICROWIRE®, and DSP • Low power, flexible, high performance, low noise, 16-/24-bit • SPI configuration control sigma-delta (Σ-Δ) ADC suitable for converting low input • 3-wire serial digital interface (Schmitt trigger on SCLK) bandwidth analog signals with a fully flexible output data rate (ODR) between 4.17 SPS and 470 SPS. • An on-chip low noise instrumentation amplifier allows signals of small amplitude to interface directly to the ADC. • Combines three differential input channels with low power consumption. • With an ODR of 4.17 SPS and a gain of 64, the AD7792/ AD7793 boast an rms noise of 40 nV. • Contains a precision low noise, low drift internal band gap reference and can accept an external differential reference. • Available in a 16-lead TSSOP package, allowing a reduced board size. 1 This document provides users with an overview of the AD7792/AD7793; it is not a notice of performance or intent. Refer to the AD7792/AD7793 data sheet for performance and more specific information about these products.
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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2013 Analog Devices, Inc. All rights reserved.
Document Outline General Description Features and Benefits Key Characteristics Fundamental Specifications Noise Operating the AD7792/AD7793 Data Interface Data Modes Continuous Conversion Mode (Default) Continuous Read Mode Single Conversion Mode Typical Application Diagram Frequently Asked Questions Learn More and Start Designing Compatible Devices Package Diagram Getting Started