The ADM1192 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 and in 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. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever it is required. Up to four unique I2C addresses can be created, depending on the way the ADR pin is 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 output exceeds the SETV voltage. This event is detected at the ALERT block. The ALERT block then charges up the external TIMER capacitor with a fixed current. When this timing cycle is complete, the ALERT output asserts.
The ALERT output can be used as a flag to warn a micro-controller or field programmable gate array (FPGA) of an overcurrent condition. ALERT outputs of multiple ADM1192 devices can be tied together and used as a combined alert.
A basic P-channel FET hot swap circuit can be implemented with the ALERT output. The value of the TIMER capacitor should be set so that the charging time of this capacitor is much longer than the period where a higher than nominal inrush current may be flowing.
The ADM1192 is packaged in a 10-lead MSOP.
Data Sheet, Rev. B, 2/08
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|ADM1192: Digital Power Monitor with Clear Pin and ALERT Output Datasheet (Rev C, 06/2012) (pdf, 409 kB)||Data Sheets|
|ADM1191 / ADM1192 Evaluation Board (pdf, 1443 kB)||Evaluation Kit Manuals|
|Power System Management (Spring 2007) (pdf, 1170 kB)||Overview|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
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ADM1175-78 & ADM1191-92 Evaluation Software
This version of software supports Windows XP, Windows Vista, and Windows 7 and is recommended for new installations. It requires the ADMxxxx Common Run-time to be installed in order to provide driver support for the all supported I2C interfaces. This includes the USB-SDP-CABLEZ, USB-SMBUS-CABLEZ and USB-5PSMBUS-CABLEZ interfaces.
ADMxxxx Common Run-Time
This run-time installer is shared between the SuperSequencer, ADM1175-92, and the Hot Swap and Power Monitor tools. Contains driver support for the USB-SMBUS-CABLEZ and USB-SDP-CABLEZ interface connectors.
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.