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AD7982 датащи(PDF) 1 Page - Analog Devices |
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AD7982 датащи(HTML) 1 Page - Analog Devices |
1 / 26 page 18-Bit, 1 MSPS PulSAR 7 mW ADC in MSOP/LFCSP Data Sheet AD7982 FEATURES 18-bit resolution with no missing codes Throughput: 1 MSPS Low power dissipation 4 mW at 1 MSPS (VDD only) 7 mW at 1 MSPS (total) 70 μW at 10 kSPS INL: ±1 LSB typical, ±2 LSB maximum Dynamic range: 99 dB typical True differential analog input range: ±VREF 0 V to VREF with VREF between 2.5 V to 5.0 V Allows use of any input range Easy to drive with the ADA4941-1 or ADA4940-1 No pipeline delay Single-supply 2.5 V operation with 1.8 V, 2.5 V, 3 V, and 5 V logic interface Proprietary serial interface SPI-/QSPI™/ MICROWIRE™-/ DSP-compatible1 Ability to daisy-chain multiple ADCs and busy indicator 10-Lead MSOP and 3 mm × 3 mm 10-Lead LFCSP APPLICATIONS Battery-powered equipment Data acquisition systems Medical instruments Seismic data acquisition systems FUNCTIONAL BLOCK DIAGRAM AD7982 REF GND VDD IN+ IN– VIO SDI SCK SDO CNV 1.8V TO 5V ADA4940-1/ ADA4941-1 3- OR 4-WIRE INTERFACE (SPI, CS DAISY CHAIN) 2.5V TO 5V 2.5V ±10V, ±5V, .. Figure 1. GENERAL DESCRIPTION The AD7982 is an 18-bit, successive approximation, analog-to- digital converter (ADC) that operates from a single power supply, VDD. The AD7982 contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7982 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phases between 0 V and VREF. The reference voltage, VREF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput. The serial peripheral interface (SPI)-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. The AD7982 is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply. The AD7982 is available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C. Table 1. MSOP and LFCSP 14-/16-/18-Bit PulSAR® ADCs Bits 100 kSPS 250 kSPS 400 kSPS to 500 kSPS ≥1000 kSPS 181 AD7989-1 AD7691 AD7690 AD7982 AD7989-5 AD7984 161 AD7684 AD7687 AD7688 AD7915 AD7693 AD7916 162 AD7680 AD7685 AD7686 AD7980 AD7683 AD7694 AD7988-5 AD7983 AD7988-1 142 AD7940 AD7942 AD7946 1 True differential. 2 Pseudo differential. 1 Protected by U.S. Patent 6,703,961. Rev. D 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 ©2007–2017 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com |
Аналогичный номер детали - AD7982_17 |
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Аналогичное описание - AD7982_17 |
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