Catalog
Quad DC Power Monitor, 16-bit, 2 Alerts, I2C
Key Features
• High-Side Current Monitor with Four Channels* 100 mV Full-Scale Range (configurable to 50mV)
• * External Sense Resistor Sets the Full-Scale Current Range
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• Voltage Monitor with Wide VBUS Range* 0V to 9V FSR (configurable to 4.5V)
• * 16-bit Resolution
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• Real-Time Auto-Calibration of Offset Error for Voltage and Current
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• 1% Power Measurement Accuracy over a Wide Dynamic Range
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• On-Chip Accumulation of 30-bit Power Results for Energy Measurement* User Programmable Sampling Rates of 8, 64, 256 and 1024 SPS
• * 5120 SPS for a Single Channel in Burst Mode
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• 2.7V to 5.5V Supply Operation* 1.62-5.5V Capable I2C/SMBus and Digital I/O
• * SMBus 3.1 and I2C Fast Mode Plus, 1 Mbps
• * High-Speed Mode (3.4 Mbps)
• * Two Independent ALERT/GPIO pins
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• ALERT on Over/Undervoltage and Current or Overpower Conditions* Coulomb Counting: When Selected, the Accumulator Accumulates VSENSE Values
Description
AI
The PAC1944 is a quad power monitor and energy monitor that reports on bus voltage and sense voltage 16-bits of resolution. Power is reported as a simultaneous product of two 16-bit independent bus and sense voltages. All registers are accessible through I2C / SMBus including an 8 sample average for reading stability. The device can detect over/undervoltage, over/undercurrent and overpower against user programmed limits for each channel and generate ALERT outputs.
