PAC1941 Series

16-bit, 9V Power Monitor, 2 alert output, I2C

Catalog

16-bit, 9V Power Monitor, 2 alert output, I2C

Part	Mounting Type	Accuracy	Function	Supplier Device Package	Operating Temperature [Min]	Operating Temperature [Max]	Sensing Method	Voltage - Input [Min]	Voltage - Input [Max]	Package / Case	Current - Output
Microchip Technology PAC1941T-2E/J6CX	Surface Mount	1 %	Current/Voltage Monitor	16-WLCSP (2.23x2.17)	-40 °C	125 °C	High-Side	2.7 V	5.5 V
Microchip Technology PAC1941T-1E/J6CX	Surface Mount	1 %	Current/Voltage Monitor	16-WLCSP (2.23x2.17)	-40 °C	125 °C	High-Side	2.7 V	5.5 V
Microchip Technology PAC1941T-2E/4MX	Surface Mount Wettable Flank	1 %	Current/Voltage Monitor	16-VQFN (3x3)	-40 °C	125 °C	High-Side	2.7 V	5.5 V	16-VFQFN Exposed Pad
Microchip Technology PAC1941T-1E/4MXVAO	Surface Mount Wettable Flank	1 %	Current Monitor	16-VQFN (3x3)	-40 °C	125 °C	High-Side	2.7 V	5.5 V	16-VFQFN Exposed Pad	100 mA
Microchip Technology PAC1941T-2E/4MXVAO	Surface Mount Wettable Flank	1 %	Current Monitor	16-VQFN (3x3)	-40 °C	125 °C	Low-Side	2.7 V	5.5 V	16-VFQFN Exposed Pad	100 mA

Catalog

16-bit, 9V Power Monitor, 2 alert output, I2C

Key Features

• High-Side/Low-Side Current Monitor* 100 mV Full-Scale Range (Configurable for 50 mV)

• * 16-Bit Resolution

• * External Senss Resistor Sets the Full-Scale Current Range

• * Very Low Input Current Simplifies Routing

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• Voltage Monitor with Wide VBUS Range* 0 to 9V Full-Scale Range (Configurable to 4.5V)

• * Auto-Calibration of Offset Error for Voltage and Current

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• 1% Power Measurement Accuracy Over a Wide Dynamic Range* On-Chip Accumulation of 30-bit Power Results for Energy Measurement

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• User Programmable Sampling Rates of 8, 64, 256, 1024* 5120 SPS for Burst Mode

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• 2.7 to 5.5 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)

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• ALERT on Over/Under Voltage and Current or Overpower Conditions* Two Independent Alert/GPIO Pins

• * Coulomb Counting: When Selected, the Accumu lator Accumulates VSENSE Values

Description

The PAC1941 is a 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. There are two versions of the PAC1941: the PAC1941-1 devices are for high-side current sensing and the PAC1941-2 devices are for low-side current sensing.