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AD7694BRM Datasheet(PDF) 1 Page - Analog Devices |
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AD7694BRM Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page 16-Bit, 250 kSPS PulSAR® ADC in MSOP AD7694 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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.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 © 2005 Analog Devices, Inc. All rights reserved. FEATURES 16-bit resolution with no missing codes Throughput: 250 kSPS @ 5 V INL: ±4 LSB max S/(N + D): 92 dB @ 20 kHz THD: –106 dB @ 20 kHz Pseudo-differential analog input range: 0 V to VREF with VREF up to VDD No pipeline delay Single-supply operation: 2.7 V or 5 V Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible Supply Current: 540 μA @ 2.7 V/100 kSPS, 800 μA @ 5 V/100 kSPS Standby current: 1 nA 8-lead MSOP package Improved second source to LTC1864 and LTC1864L APPLICATIONS Battery-powered equipment Data acquisition Instrumentation Medical instruments Process control GENERAL DESCRIPTION The AD7694 is a 16-bit, charge redistribution, successive approximation, PulSAR analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.7 V to 5.25 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes (B grade), an internal conversion clock, and a serial, SPI-compatible interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, it samples an analog input, IN+, between 0 V to REF with respect to a ground sense, IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Its power scales linearly with throughput. The AD7694 is housed in an 8-lead MSOP package with an operating temperature specified from −40°C to +85°C. APPLICATION DIAGRAM AD7694 REF GND VDD IN+ IN– SCK SDO CNV 3-WIRE SPI INTERFACE 1V TO VDD 2.5V TO 5V 0 TO VREF Figure 1. Table 1. MSOP, LFCSP (QFN)/SOT-23, 16-Bit PulSAR ADC Type 100 kSPS 250 kSPS 500 kSPS True Differential AD7684 AD7687 AD7688 Pseudo AD7683 AD7685 AD7686 Differential/Unipolar AD7694 Unipolar AD7680 |
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