Description
The PAC1921 is a dedicated power-monitoring device with a configurable analog output that can present power, current or voltage. The PAC1921 is designed for power measurement and diagnostic systems that cannot allow for latency when performing high-speed power management. Measurements are accumulated in large lossless 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.

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
      microcontroller with ADC inputs
   - Unique lossless integrating architecture
      allows operation at low sense voltages
   - 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)
• Power Supply
   - VDD = 3.3V nominal (operational range 3.0V
      to 5.5V)
• Bus Range 0V to 32V
• No Input Filters Required
• Available in a 10-pin 3 mm x 3 mm VDFN RoHS
   Compliant Package

APPLICATIONs
• Diagnostic Equipment
• Servers
• Power Supplies
• Industrial and Power Management Systems
• Notebook and Desktop Computers