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AD7171BCPZ-REEL7 Arkusz danych(PDF) 1 Page - Analog Devices |
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AD7171BCPZ-REEL7 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 17 page 16-Bit, Low Power, Sigma-Delta ADC Data Sheet AD7171 Rev. C 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 ©2009–2016 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Output data rate: 125 Hz Pin-programmable power-down and reset Status function Internal clock oscillator Current: 135 µA Power supply: 2.7 V to 5.25 V −40°C to +105°C temperature range Package: 10-lead 3 mm × 3 mm LFCSP INTERFACE 2-wire serial (read-only device) SPI compatible Schmitt trigger on SCLK APPLICATIONS Weigh scales Pressure measurement Industrial process control Portable instrumentation FUNCTIONAL BLOCK DIAGRAM 16-BIT Σ-Δ ADC AD7171 GND INTERNAL CLOCK VDD REFIN(+) AIN(+) AIN(–) REFIN(–) DOUT/RDY SCLK PDRST Figure 1. Table 1. VREF = VDD RMS Noise P-P Noise P-P Resolution ENOB 5 V 11.5 µV 76 µV 16 bits 16 bits 3 V 6.9 µV 45 µV 16 bits 16 bits GENERAL DESCRIPTION The AD7171 is a very low power, 16-bit, analog-to-digital converter (ADC). It contains a precision, 16-bit, Σ-Δ ADC and an on-chip oscillator. Consuming only 135 µA, the AD7171 is particularly suitable for portable or battery operated products where very low power is a requirement. The AD7171 also has a power-down mode in which the device consumes 5 μA, thus increasing the battery life of the product. For ease of use, dedicated pins control all of the features of the AD7171. Each time a data read occurs, eight status bits are appended to the 16-bit conversion. These status bits contain a pattern sequence that can be used to confirm the validity of the serial transfer. The output data rate of the AD7171 is 125 Hz, whereas the settling time is 24 ms. The AD7171 has one differential input and a gain of 1. This is useful in applications where the user needs to use an external amplifier to implement system-specific filtering or gain requirements. The AD7171 operates with a power supply from 2.7 V to 5.25 V. It is available in a 10-lead LFCSP. The AD7170 is a 12-bit version of the AD7171. It has the same feature set as the AD7171 and is pin-for-pin compatible. |
Podobny numer części - AD7171BCPZ-REEL7 |
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Podobny opis - AD7171BCPZ-REEL7 |
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