Analog Devices Inc. ADM1293/ADM1294 Digital Power Monitors

Analog Devices ADM1293/ADM1294 Digital Power Monitors are high accuracy, integrated digital power monitors that provide digital current, voltage, and power monitoring using an on-chip, 12-bit analog-to-digital converter (ADC), communicated through a PMBus™ compliant I²C interface. ADM1293/ADM1294 Digital Power Monitors receive the current by measuring the voltage difference across the external sense resistor. ADM1293/ADM1294 amplifies and digitizes the voltage using an internal 12-bit ADC. In addition, that same ADC can sample the primary input voltage and an auxiliary input voltage. ADM1293/ADM1294's internal digital block performs multiplication of the current and primary input voltage for power calculation. The devices also feature a power accumulator for energy metering. An industry-standard PMBus interface enables a master controller to read back the data from the device. The master controller combines the information with a known sense resistor value to calculate the current, voltage, power, and energy consumption overtime on the monitored rail. ADM1293 Digital Power Monitors are designed for high-side supply monitoring with a voltage monitoring range from 0V to 20V. The ADM1294 Digital Power Monitors are designed for low-side supply monitoring.


  • Monitor current and two voltages
  • High accuracy current monitoring at low sense voltage 0.33% accurate at ±20mV sense voltage over temperature
  • Common-mode sense voltage from 0V to 20V (ADM1293)
  • Support high-side and low-side current sensing
  • Integrated shunt regulator for wide supply input (ADM1294)
  • Reports current, voltage, and power
  • Power accumulation for energy metering
  • Bidirectional current sensing
  • Digitally programmable overcurrent alert
  • Multifunctional pins with user-configurable functions
  • ADC conversion enable input
  • Multisource alert output
  • User-controllable GPO
  • Peak detect registers for current, voltage, and power
  • PMBus fast mode compliant interface
  • Separate SDA I/O for easy isolated communication
  • Two address pins for 16 unique I2C addresses
  • Available in 4mm × 4mm, 16-lead LFCSP, and 14-lead TSSOP
  • -40°C to +105°C operating temperature range


  • Power monitoring/power budgeting
  • Central office equipment
  • Telecommunications and data communications equipment
  • PCs/servers
Publicado: 2015-05-07 | Actualizado: 2023-06-21