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.
Additional 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
Voltage Monitor with Wide VBUS Range
0V to 9V FSR (configurable to 4.5V)
16-bit Resolution
Real-Time Auto-Calibration of Offset Error for Voltage and Current
1% Power Measurement Accuracy over a Wide Dynamic Range
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
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
ALERT on Over/Undervoltage and Current or Overpower Conditions
Coulomb Counting: When Selected, the Accumulator Accumulates VSENSE Values
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.
Additional 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
- Voltage Monitor with Wide VBUS Range
- 0V to 9V FSR (configurable to 4.5V)
- 16-bit Resolution
- Real-Time Auto-Calibration of Offset Error for Voltage and Current
- 1% Power Measurement Accuracy over a Wide Dynamic Range
- 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
- 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
- ALERT on Over/Undervoltage and Current or Overpower Conditions
- Coulomb Counting: When Selected, the Accumulator Accumulates VSENSE Values
