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AD7789BRM датащи(PDF) 1 Page - Analog Devices |
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AD7789BRM датащи(HTML) 1 Page - Analog Devices |
1 / 20 page Low Power, 16-/24-Bit, Sigma-Delta ADCs AD7788/AD7789 Rev. B 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 ©2006 Analog Devices, Inc. All rights reserved. FEATURES AD7788: 16-bit resolution AD7789: 24-bit resolution Power Supply: 2.5 V to 5.25 V operation Normal: 75 μA maximum Power-down: 1 μA maximum RMS noise: 1.5 μV AD7788: 16-bit p-p resolution AD7789: 19-bit p-p resolution (21.5 bits effective) Integral nonlinearity: 3.5 ppm typical Simultaneous 50 Hz and 60 Hz rejection Internal clock oscillator VDD monitor channel 10-lead MSOP INTERFACE 3-wire serial SPI®-, QSPI™-, MICROWIRE™-, and DSP-compatible Schmitt trigger on SCLK APPLICATIONS Smart transmitters Battery applications Portable instrumentation Sensor measurement Temperature measurement Pressure measurement Weigh scales 4 to 20 mA loops FUNCTIONAL BLOCK DIAGRAM SERIAL INTERFACE AND CONTROL LOGIC CLOCK *AD7788: 16-BIT ADC AD7789: 24-BIT ADC AIN(+) AIN(–) GND Σ-Δ ADC* AD7788/ AD7789 REFIN(+) REFIN(–) VDD DOUT/RDY DIN SCLK CS Figure 1. GENERAL DESCRIPTION The AD7788/AD7789 are low power, low noise, analog front ends for low frequency measurement applications. The AD7789 contains a low noise, 24-bit, ∑-Δ ADC with one differential input. The AD7788 is a 16-bit version of the AD7789. The devices operate from an internal clock. Therefore, the user does not have to supply a clock source to the devices. The output data rate is 16.6 Hz, which gives simultaneous 50 Hz/60 Hz rejection. The parts operate with a single power supply from 2.5 V to 5.25 V. When operating from a 3 V supply, the power dissi- pation for the part is 225 μW maximum. The AD7788/AD7789 are available in a 10-lead MSOP. |
Аналогичный номер детали - AD7789BRM |
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Аналогичное описание - AD7789BRM |
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