Microchip Technology PAC1861 16-Bit Single-Channel Power Monitor
Microchip Technology PAC1861 16-Bit Single-Channel Power Monitor combines a bus voltage monitor, current sense amplifier, and 16-bit ADC to measure voltage, current, power, and accumulated energy. Designed for both high-side and low-side current-sensing configurations, the device supports a wide 65V bus-voltage measurement range and provides onboard power calculations and long-term energy accumulation capabilities. The PAC1861 supports programmable sampling rates, rolling averages, minimum and maximum tracking, and a configurable alert system for voltage, current, power, and accumulator events. Communication is provided via SMBus 3.1 and I2C interfaces, with support for Fast-mode Plus and High-speed modes. Microchip Technology PAC1861 Power Monitor is available in multiple compact package options, including 8-lead VDFN, 10-lead VDFN, and 10-lead MSOP packages, with variants supporting low-side monitoring, dedicated ALERT outputs, and hardware power-down functionality.
Features
- Single-channel power monitoring with integrated voltage and current measurement
- Real-time offset calibration with no user adjustment required
- On-chip power calculation and energy accumulation
- Dynamic power scaling for reduced power consumption
- Configurable alert system for voltage, current, power, and accumulator events
- Tracks minimum and maximum values for voltage, current, and power
- User-programmable sampling rates and Single-shot measurement modes
- Supports SMBus 3.1, I2C Fast-mode Plus, and I2C High-speed mode
- Programmable rolling-average measurements
- Supports high-side and low-side power monitoring on select package options
- Hardware power-down support on 10-lead VDFN versions
Applications
- Low current general-purpose
- Battery-powered
- Portable and embedded computing
- Smart home and smart city
- USB type-A, type-B, and type-C connectivity
- Networking
- Automotive
- Internet of Things (IoT)
Specifications
- 16-bit bus voltage measurement resolution
- 16-bit current sense measurement resolution
- Up to 65V bus voltage measurement
- ±65 bipolar bus voltage measurement
- 100mV current sense full-scale range
- ±100mV and ±50mV bipolar current sense ranges
- 2.7V to 5.5V supply voltage range
- 1.62V to 5.5V digital I/O operating range
- 145μA active current at 1024sps
- 7μA current consumption at 8sps
- 3.5μA typical sleep current
- -40°C to +125°C operating temperature range
- Packages
- 3mm x 3mm 8-lead VDFN
- 3mm x 3mm 10-lead VDFN
- 3mm x 3mm 10-lead MSOP
Package Options
