Datasheet AD7684 (Analog Devices)

16-Bit, 100 kSPS PulSAR, Differential ADC in MSOP AD7684 FEATURES APPLICATION DIAGRAM 16-bit resolution with no missing codes 0.5V TO VDD 2.7V TO 5.5V Throughput: 100 kSPS VREF INL: ±1 LSB typical, ±3 LSB maximum 0 REF VDD True differential analog input range: ±VREF +IN DCLOCK 0 V to VREF with VREF up to VDD on both inputs 3-WIRE SPI –IN AD7684 DOUT INTERFACE Single-supply operation: 2.7 V to 5.5 V CS V GND REF Serial interface SPI®-/QSPI-™/MICROWIRE-™/DSP-compatible 0 Power dissipation
04302-001
4 mW @ 5 V
Figure 1.
1.5 mW @ 2.7 V Table 1. MSOP, QFN (LFCSP)/SOT-23 150 μW @ 2.7 V/10 kSPS 14-/16-/18-Bit PulSAR ADC Standby current: 1 nA 400 kSPS 8-lead MSOP package 100 250 to ≥ 1000 ADC Type kSPS kSPS 500 kSPS kSPS Driver
18-Bit True AD7691 AD7690 AD7982 ADA4941
APPLICATIONS
Differential AD7984 ADA4841
Battery-powered equipment
16-Bit True AD7684 AD7687 AD7688 ADA4941
Data acquisition
Differential AD7693 ADA4841
Instrumentation
16-Bit Pseudo AD7680 AD7685 AD7686 AD7980 ADA4841
Medical instruments
Differential AD7683 AD7694
Process control
14-Bit Pseudo AD7940 AD7942 AD7946 ADA4841 Differential
GENERAL DESCRIPTION
The AD7684 is a 16-bit, charge redistribution, successive On the CS falling edge, it samples the voltage difference approximation, PulSAR® analog-to-digital converter (ADC) between +IN and –IN pins. The reference voltage, REF, is that operates from a single power supply, VDD, between 2.7 V applied externally and can be set up to the supply voltage. Its to 5.5 V. It contains a low power, high speed, 16-bit sampling power scales linearly with throughput. ADC with no missing codes, an internal conversion clock, and a The AD7684 is housed in an 8-lead MSOP, with an operating serial, SPI-compatible interface port. The part also contains a low temperature specified from −40°C to +85°C. noise, wide bandwidth, short aperture delay, track-and-hold circuit.
Rev. A 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No 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 ©2004–2007 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS APPLICATION DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS APPLICATION INFORMATION CIRCUIT INFORMATION CONVERTER OPERATION TRANSFER FUNCTIONS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE LAYOUT EVALUATING THE PERFORMANCE OF THE AD7684 OUTLINE DIMENSIONS ORDERING GUIDE