Description

The PAC194X products are one, two, three and

four-channel energy monitors, with bus voltage

monitors and current sense amplifiers that feed

high-resolution ADCs. There are two versions of the

PAC194X: the PAC194X-1 devices are for high-side

current sensing and the PAC194X-2 devices are for

low-side current sensing or floating VBUS applications.

Digital circuitry performs power calculations and

energy accumulation. This enables energy monitoring

with integration periods up to one year or longer. Bus

voltage, sense resistor voltage and accumulated proportional

power are stored in registers for retrieval by

the system host or embedded controller. The PAC194X

devices have a set of digital comparators that allow the

user to detect over/undervoltage, over/undercurrent

and overpower against user programmed limits for

each channel and generate an ALERT when the

threshold is exceeded.

The sampling rate and energy integration period can be

controlled over SMBus or I2C. Active channel selection,

single-shot measurements and other controls are also

configurable by the SMBus or I2C. The PAC194X

device family uses real-time calibration to minimize the

offset error. No input filters are required for this device.

Features

• High-Side/Low-Side Current Monitor with One,

Two, Three or Four Channels:

- 100 mV Full-Scale Range (FSR) for current

sense voltage

- 16-bit resolution for current measurement

- Programmable FSR: -50 mv to +50 mv

- External sense resistor sets the full-scale

current range

- Very low input current simplifies routing

• Voltage Monitor with Wide VBUS Range

- 0V to 9V FSR

- 4.5V programmable VBUS option

- 16-bit resolution for voltage measurements

• VSOURCE Can Be Applied before VDD Is Applied

• 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)

• SMBus Address – 16 Options, Set with Resistor

• ALERT Features that Can Be Enabled:

- ALERT on conversion complete

- ALERT on Over/Undervoltage and Current or

Overpower conditions

• Coulomb Counting: When Selected, the

Accumulator Accumulates VSENSE Values.

• 8X Averaging Mode for Single-Shot

Measurements to Reduce Noise and Offset

• Two Independent ALERT/GPIO pins

• Available Packages

- 3 x 3 mm 16-Lead VQFN with wettable flanks

- 2.225 x 2.17 mm 16-Lead WLCSP

Applications

• Embedded Computing

• Networking

• FPGA Systems

• Low-Voltage/High-Power – AI, GPU

• Industrial

• Linux® Applications

• Notebook and Tablet Computing

• Cloud, Linux and Server Computing

• Optical Networking Modules

Computing Platform Support

• Windows® 10 Driver

• Linux Driver

• Python™ Script

• MCC Library