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AD7984BCPZ датащи(PDF) 1 Page - Analog Devices |
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AD7984BCPZ датащи(HTML) 1 Page - Analog Devices |
1 / 24 page 18-Bit, 1.33 MSPS PulSAR 10.5 mW ADC in MSOP/QFN AD7984 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. FEATURES 18-bit resolution with no missing codes Throughput: 1.33 MSPS Low power dissipation: 10.5 mW at 1.33 MSPS INL: ±2.25 LSB maximum Dynamic range: 99.7 dB typical True differential analog input range: ±VREF 0 V to VREF with VREF between 2.9 V to 5.0 V Allows use of any input range Easy to drive with the ADA4941 No pipeline delay Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface Serial interface SPI-/QSPI™-/MICROWIRE™-/DSP-compatible Ability to daisy-chain multiple ADCs and busy indicator 10-lead MSOP (MSOP-8 size) and 10-lead 3 mm × 3 mm QFN (LFCSP), SOT-23 size APPLICATIONS Battery-powered equipment Data acquisition systems Medical instruments Seismic data acquisition systems APPLICATION DIAGRAM AD7984 REF GND VDD IN+ IN– VIO SDI SCK SDO CNV 1.8V TO 5V ADA4941 3- OR 4-WIRE INTERFACE (SPI, CS DAISY CHAIN) 2.9V TO 5V 2.5V ±10V, ±5V, .. Figure 1. GENERAL DESCRIPTION The AD7984 is an 18-bit, successive approximation, analog-to- digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 18-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7984 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, REF, is applied externally and can be set independent of the supply voltage, VDD. The 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. It is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply. The AD7984 is available in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C. Table 1. MSOP, QFN (LFCSP) 14-/16-/18-Bit PulSAR® ADC Type 100 kSPS 250 kSPS 400 kSPS to 500 kSPS ≥1000 kSPS ADC Driver 14-Bit AD7940 AD79421 AD79461 16-Bit AD7680 AD76851 AD76861 AD79801 ADA4941-x AD7683 AD76871 AD76881 AD79831 ADA4841-x AD7684 AD7694 AD76931 18-Bit AD76911 AD76901 AD79821 ADA4941-x AD79841 ADA4841-x 1 Pin-for-pin compatible. |
Аналогичный номер детали - AD7984BCPZ |
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Аналогичное описание - AD7984BCPZ |
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