Microchip Technology Inc
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PAC1921

Status: In Production

Features:

  • Configurable Measurement Type Output: Power, Current or Bus Voltage
  •  All output values also available over SMBus>
  • Provides integrated average power measurement
  • Power measurements provided to micro-controller with ADC inputs
  • Output voltage proportional to selected measurement>
  • 100 mV full-scale current sense voltage range
  • Second-order delta-sigma ADC with 11-bit or 14-bit resolution
  • Selectable current binary gain ranges: 1x through 128x>
  • 1% Power Measurement Accuracy
  • Auto-Zero Offset>
  • Auto Sleep State>- Automatically shifts to low-power state (3.5 μA)
  • VDD = 3.3V nominal (operational range 3.0V to 5.5V)>
  • Bus Range 0V to 32V>
  • No Input Filters Required>
  • 10-pin 3 mm x 3 mm VDFN RoHS Compliant Package
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

     The PAC1921 is a dedicated power-monitoring device with a configurable analog output that can present power, current or voltage. All information is also provided on the 2-wire/I2C© compatible interface.  The PAC1921 is designed for power measurement and diagnostic systems that cannot allow for latency when performing high-speed power management. The device is 0.4% accurate for current readings and 1% accurate for power readings.
     Measurements are accumulated in large registers, allowing for integration periods of 500 μs to 2.9 seconds. The measurement is averaged and presented on the analog output with a full scale range of 3V, 2V, 1.5V, or 1.0V.
      The PAC1921 has a READ/INT pin for host control of the measurement integration period. This pin can be used to synchronize readings of multiple buses between several devices. Data sampling and output attributes, such as the internal ADC resolution (11-bit or 14-bit) and sample rate, are configurable.   The device can monitor power rails from 0-32V with a full-scale capability of 100 mV across the sense resistor. No input filters are required for this device.

Additional Features
    • Configurable Measurement Type Output: Power, Current or Bus Voltage
    • Configurable Voltage Output (3V, 2V, 1.5V, 1V)
      •  All output values also available over SMBus>
    • New Device Topology
      • Provides integrated average power measurement
      • Power measurements provided to micro-controller with ADC inputs
      • Output voltage proportional to selected measurement>
    • High-Side Current Sensor
      • 100 mV full-scale current sense voltage range
      • Second-order delta-sigma ADC with 11-bit or 14-bit resolution
      • Selectable current binary gain ranges: 1x through 128x>
    • 1% Power Measurement Accuracy
    • Auto-Zero Offset>
    • Auto Sleep State>- Automatically shifts to low-power state (3.5 μA)
    • VDD = 3.3V nominal (operational range 3.0V to 5.5V)>
    • Bus Range 0V to 32V>
    • No Input Filters Required>
    • 10-pin 3 mm x 3 mm VDFN RoHS Compliant Package
Parametrics
Name
Value
# Current Sensors
1
Description
Current/DC Power Sensor
Full Scale Range (mV)
100
Current Measuerment Max Accr (%)
+/-0.4
Effective Sampling Interval min to max (msec)
0.9 - 2900
Bus Voltage Range (V)
0 to +32
Interface
SMBus/I2C
Address Select
yes

Documents

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aspxMarket_Communication

06/08/2015
803KB

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
PAC1921 High Side Power and Current Monitor Evaluation Board
PAC1921 High Side Power and Current Monitor Evaluation Board ( ADM00592 )

The PAC1921 is a dedicated power monitoring device with a configurable analog output. This device is unique in that all power related information is available on the 2-wire/I2C© compatible interface and power, current, or voltage is available on the analog output..  The PAC1921 High-Side Current/Power Sensor Evaluation Board package provides users with the means to...

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RoHS Information

Part Number
Device Weight
Shipping Weight
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
PAC1921-1-AIA-TR
0.027700
0.114000
10
VDFN
3x3x0.9
NiPdAu
e4
Rohs icon
efup china icon
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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