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AD7981 датащи(PDF) 1 Page - Analog Devices |
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AD7981 датащи(HTML) 1 Page - Analog Devices |
1 / 26 page High Temperature, 16-Bit, 600 kSPS PulSAR ADC Data Sheet AD7981 Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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 ©2014–2017 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Extreme high temperature operation Specified temperature range −55°C to +210°C (10-lead FLATPACK) −55°C to +175°C (10-Lead MSOP) High performance 16-bit resolution with no missing codes 600 kSPS throughput with no latency/pipeline delay SNR: 91 dB typical at 1 kHz input frequency THD: −102 dB typical at 1 kHz input frequency INL: ±2.5 LSB maximum, DNL: ±0.9 LSB maximum Low power 2.25 mW typical at 600 kSPS (VDD only) 4.65 mW typical at 600 kSPS (total) 75 µW typical at 10 kSPS Small footprint 10-lead, 3 mm × 3 mm, monometallic wire bonding MSOP 10-lead, 0.255 mm × 0.255 mm, monometallic wire bonding FLATPACK Pseudo differential analog input range 0 V to VREF with VREF between 2.4 V and 5.1 V Single-supply 2.5 V operation with 1.8 V to 5 V logic interface SPI-/QSPI-/MICROWIRE-/DSP-compatible digital interface Daisy-chain multiple ADCs and busy indicator APPLICATIONS Downhole drilling and instrumentation Avionics Heavy industrial High temperature environments TYPICAL APPLICATION CIRCUIT Figure 1. GENERAL DESCRIPTION The AD79811 is a 16-bit, successive approximation, PulSAR® analog-to-digital converter (ADC) designed for high temperature operation. The AD7981 is capable of sample rates of up to 600 kSPS while maintaining low power consumption from a single power supply, VDD. It is a fast throughput, high accuracy, high tempera- ture, successive approximation register (SAR) ADC, packaged in a small form factor with a versatile serial port interface (SPI). On the CNV rising edge, the AD7981 samples an analog input, IN+, between 0 V and REF with respect to a ground sense, IN−. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. The device power scales linearly with throughput. 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, or 5 V logic, using the separate supply, VIO. For space constrained applications, the AD7981 is available in a 10-lead mini small outline package (MSOP) with operation speci- fied from −55°C to +175°C and 10-lead ceramic flat package (FLATPACK) with operation specified from −55°C to +210°C. These packages are designed for robustness at extreme tempera- tures, including monometallic wire bonding, and are qualified for up to 1000 hours of operation at the maximum temperature rating. The AD7981 is a member of a growing series of high temperature qualified products offered by Analog Devices, Inc. For a complete selection of available high temperature products, see the high temperature product list and qualification data available at www.analog.com/hightemp. 1 Protected by U.S. Patent 6,703,961. AD7981 REF GND VDD IN+ IN– VIO SDI SCK SDO CNV 1.8V TO 5.0V 3- OR 4-WIRE INTERFACE (SPI, DAISY CHAIN, CS) 2.5V to 5.0V 2.5V 0V TO VREF |
Аналогичный номер детали - AD7981_17 |
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Аналогичное описание - AD7981_17 |
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