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1 / 24 page 16-Bit Lower Power PulSAR ADCs in MSOP/LFCSP Data Sheet AD7988-1/AD7988-5 Rev. G 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 ©2012–2017 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Low power dissipation AD7988-1 400 µW at 100 kSPS (VDD only) 700 µW at 100 kSPS (total) AD7988-5 2 mW at 500 kSPS (VDD only) 3.5 mW at 500 kSPS (total) 16-bit resolution with no missing codes Throughput: 100 kSPS/500 kSPS options INL: ±0.6 LSB typical, ±1.25 LSB maximum SINAD: 91.5 dB at 10 kHz THD: −114 dB at 10 kHz Pseudo differential analog input range 0 V to VREF with VREF from 2.5 V to 5.0 V No pipeline delay Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface Proprietary SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface Daisy-chain multiple ADCs 10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP, same space as SOT-23 Wide operating temperature range: −40°C to +125°C APPLICATIONS Battery-powered equipment Low power data acquisition systems Portable medical instruments ATE equipment Data acquisitions Communications GENERAL DESCRIPTION The AD7988-1/AD7988-51 are 16-bit, successive approximation, analog-to-digital converters (ADC) that operate from a single power supply, VDD. The AD7988-1 offers a 100 kSPS throughput, and the AD7988-5 offers a 500 kSPS throughput. They are low power, 16-bit sampling ADCs with a versatile serial interface port. On the CNV rising edge, they sample an analog input, IN+, between 0 V to VREF 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 SPI-compatible serial interface also features the ability to daisy-chain several ADCs on a single 3-wire bus using the SDI input. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply, VIO. The AD7988-1/AD7988-5 generics are housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +125°C. Table 1. MSOP, LFCSP, LGA 14-/16-/18-/20-Bit Precision SAR ADCs and Integrated SAR ADC μModules® Bits 100 kSPS 250 kSPS 400 kSPS to 500 kSPS ≥1000 kSPS μModule Data Acquisition System 201 AD40202 181 AD7989-12 AD76912 AD40112 AD40032 AD76902 AD40072 AD7989-52 AD79822 AD79842 161 AD7684 AD76872 AD76882 AD40012 AD76932 AD40052 AD79162 AD79152 163 AD7680 AD76852 AD76862 AD40002 ADAQ7980 AD7683 AD7694 AD7988-52 AD40042 ADAQ7988 AD7988-12 AD40082 AD79802 AD79832 143 AD7940 AD79422 AD79462 1 True differential. 2 Pin-for-pin compatible. 3 Pseudo differential. 1 Protected by U.S. Patent 6,703,961. |
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