Current/Power Sensor has analog output and 2-wire digital bus.

Press Release Summary:

Available in 3 x 3 mm VDFN package, PAC1921 consists of high-side current sensor with digital output and configurable analog output that can present power, current, or voltage over one output pin. All power-related output values are also simultaneously available over 2-Wire digital bus, which is compatible with I²C™. While 2-Wire bus maximizes data and diagnostic reporting, analog output minimizes data latency. Analog output can also be adjusted for use with 3, 2, 1.5, or 1 V MCU inputs.

Original Press Release:

High-Side Current/Power Sensor from Microchip is World's First to Feature Both a Configurable Analog Output and a 2-Wire Digital Bus

PAC1921 Maximizes Data and Diagnostic Reporting While Minimizing Data Latency

CHANDLER, Ariz. -- [NASDAQ: MCHP -- Microchip Technology Inc., a leading provider of microcontroller, mixed-signal, analog and Flash-IP solutions, today announced from the Sensors Expo a combined analog and digital current sensor--the PAC1921.  This new device is the world's first high-side current sensor with both a digital output, as well as a configurable analog output that can present power, current or voltage over the single output pin.  Simultaneously, all power related output values are also available over the 2-Wire digital bus, which is compatible with I(2)C(TM).  The PAC1921, available in a 10-lead 3x3 mm VDFN package, was designed with the 2-Wire bus to maximize data and diagnostic reporting, while having the analog output to minimize data latency.  The analog output can also be adjusted for use with 3V, 2V, 1.5V or 1V microcontroller inputs.

To learn more about Microchip's PAC1921current sensor, visit  View a brief presentation, here:

The PAC1921 is ideal for networking, power-distribution, power-supply, computing and industrial-automation applications that cannot allow for latency when performing high-speed power management.  A 39-bit accumulation register and 128 times gain configuration make this device ideal for both heavy and light system-load power measurement, from 0V to 32V.  It has the ability to integrate more than two seconds of power-consumption data.  Additionally, the PAC1921 has a READ/INT pin for host control of the measurement period; and this pin can be used to synchronize readings of multiple devices.

"The ability to output power measurements in both the digital and analog domains provides designers with a unique level of flexibility," said Bryan J. Liddiard, marketing vice president of Microchip's Analog and Interface Products Division.  "The PAC1921 accomplishes this by combining a digital current sensor to maximize data and diagnostic reporting, together with an analog current sensor to minimize data latency."

Development Support

The PAC1921 is supported by Microchip's new PAC1921 High-Side Power and Current Monitor Evaluation Board (part # ADM00592), which is available today for $64.99.

Pricing & Availability

The PAC1921 is available now for sampling and volume production, in a 10-lead 3x3 mm VDFN package, starting at $1.18 each in 5,000-unit quantities.

For additional information, contact any Microchip sales representative or authorized worldwide distributor, or visit Microchip's Web site at  To purchase products mentioned in this press release, go to microchipDIRECT or contact one of Microchip's authorized distribution partners.


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About Microchip Technology

Microchip Technology Inc. (NASDAQ: MCHP) is a leading provider of microcontroller, mixed-signal, analog and Flash-IP solutions, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide.  Headquartered in Chandler, Arizona, Microchip offers outstanding technical support along with dependable delivery and quality.  For more information, visit the Microchip website at

Note:  The Microchip name and logo is a registered trademark of Microchip Technology Incorporated in the U.S.A. and other countries.  All other trademarks mentioned herein are the property of their respective companies.

Tags / Keywords:  High-Side Current Sensor, SMBUS Current Sensor, Power Measurement, Voltage Measurement, Current Measurement, Analog Current Sensor, PAC1921

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