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ADM1191-2ARMZ-R71 データシート(PDF) 1 Page - Analog Devices |
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ADM1191-2ARMZ-R71 データシート(HTML) 1 Page - Analog Devices |
1 / 16 page Digital Power Monitor with Convert Pin and ALERTB Output ADM1191 Rev. 0 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 Powered from 3.15 V to 26 V Precision current sense amplifier Precision voltage input 12-bit ADC for current and voltage readback Convert pin (CONV) for commanding an ADC read SETV input for setting overcurrent alert threshold ALERTB output provides an overcurrent interrupt I2C® fast mode-compliant interface (400 kHz maximum) Two address pins allow 16 devices on the same bus 10-lead MSOP APPLICATIONS Power monitoring/power budgeting Central office equipment Telecommunication and data communication equipment PCs/servers GENERAL DESCRIPTION The ADM1191 is an integrated current sense amplifier that offers digital current and voltage monitoring via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I2C interface. An internal current sense amplifier senses voltage across the sense resistor in the power path via the VCC pin and the SENSE pin. A 12-bit ADC can measure the current seen in the sense resistor, as well as the supply voltage on the VCC pin. An industry-standard I2C interface allows a controller to read current and voltage data from the ADC. Measurements can be initiated by an I2C command or via the convert (CONV) pin. The CONV pin is especially useful for synchronizing reads on multiple ADM1191 devices. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever it is required. Up to 16 unique I2C addresses can be created, depending on the way the A0 pin and the A1 pin are connected. A SETV pin is also included. A voltage applied to this pin is internally compared to the output voltage on the current sense amplifier. The output of the SETV comparator asserts when the current sense amplifier ouput exceeds the SETV voltage. When this event occurs, the ALERTB output asserts. FUNCTIONAL BLOCK DIAGRAM V I 0 1 ADM1191 SENSE SETV VCC CONV MUX I2C ALERT GND COMPARATOR CURRENT SENSE AMPLIFIER A SDA SCL A1 A0 ALERTB 12-BIT ADC Figure 1. RSENSE P = VI CONTROLLER ADM1191 SENSE VCC SDA SCL SDA SCL GND ALERTB CONV CONV A0 A1 3.15V TO 26V SETV INTERRUPT Figure 2. Applications Diagram The ALERTB output can be used as a flag to warn a micro- controller or field programmable gate array (FPGA) of an overcurrent condition. ALERTB outputs of multiple ADM1191 devices can be tied together and used as a combined alert. The ADM1191 is packaged in a 10-lead MSOP. |
同様の部品番号 - ADM1191-2ARMZ-R71 |
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同様の説明 - ADM1191-2ARMZ-R71 |
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