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ADCMP343 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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ADCMP343 bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 12 page Dual 0.275% Comparators and Reference with Programmable Hysteresis Data Sheet ADCMP341/ADCMP343 Rev. A 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 ©2007–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 400 mV ± 0.275% threshold User programmable hysteresis via resistor string Supply range: 1.7 V to 5.5 V Low quiescent current: 6.5 µA typical Input range includes ground Low input bias current: ±5 nA maximum Open-drain outputs Supports wired-AND connections Input polarities: ADCMP341 noninverting ADCMP343 inverting Small SOT-23 package APPLICATIONS Portable applications Li-Ion monitoring Handheld instruments LED/relay driving Optoisolator driving Control systems GENERAL DESCRIPTION The ADCMP341/ADCMP343 consist of two low power, high accuracy comparators with a 400 mV reference in an 8-lead SOT-23 package. Operating within a supply range of 1.7 V to 5.5 V, the devices only draw 6.5 µA (typical), making them ideal for low voltage system monitoring and portable applications. Hysteresis is determined using three resistors in a string configura- tion with the upper and lower tap points connected to the ±INA_U and ±INA_L pins of each comparator, respectively. The state of the outputs of the comparators selects which pin is internally connected to the comparators input. Therefore, a change of state in the comparators output results in one of the inputs being switched in to the comparator and the other being switched out. This provides the user with a fully flexible and accurate method of setting the hysteresis. One input of each comparator is internally connected to the reference. The other input is available externally, via an internal mux, through pins ±INA_U or ±INA_L. The state of the output determines which of these pins is connected at any one time. The comparator outputs are open-drain with the output stage sinking capability guaranteed greater than 5 mA over temperature. The ADCMP341 has noninverting inputs and the ADCMP343 has inverting inputs. The devices are suitable for portable, commercial, industrial, and automotive applications. FUNCTIONAL BLOCK DIAGRAMS +INA_U +INB_U OUTA OUTB VDD GND 400mV ADCMP341 +INA_L +INB_L VINB VINA R1 R2 R3 Figure 1. ADCMP341 –INA_U –INB_U OUTA OUTB VDD GND 400mV ADCMP343 –INA_L –INB_L VINB VINA R1 R2 R3 Figure 2. ADCMP343 CH1 2.00V CH2 500mV 2 1 OUTA VIN R1 = 22kΩ R2 = 2.2kΩ R3 = 6.2kΩ M100ms Figure 3. Hysteresis programmed to 513 mV @ VIN on ADCMP341 |
Số phần tương tự - ADCMP343_15 |
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Mô tả tương tự - ADCMP343_15 |
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