ADM1294:  Digital Power Monitor with PMBus Interface

Product Details

Product Status:Recommended for New Designs

The ADM1293 and ADM1294 are high accuracy integrated digital power monitors that offer digital current, voltage, and power monitoring using an on-chip, 12-bit analog-to-digital converter (ADC), communicated through a PMBus™ compliant I2C interface.

These devices acquire the current by measuring the voltage differ-ence across the external sense resistor. This voltage is amplified and digitized by an internal 12-bit ADC. The same ADC can also sample the primary input voltage and an auxiliary input voltage. The internal digital block can perform multiplication of the current and primary input voltage for power calculation. The ADM1293/ADM1294 also feature a power accumulator for energy metering. An industry-standard PMBus interface allows a master controller to read back these data from the device. The master controller can then combine this information with a known sense resistor value to calculate the current, voltage, power, and energy consumption over time on the monitored rail.

In conditions such as overcurrent, overvoltage, undervoltage, and overpower, the ADM1293/ADM1294 devices can generate an interrupt signal to the microprocessor through the GPOx/ ALERTx outputs. The threshold for these conditions is digitally programmed via PMBus.

The ADM1293 is designed for high-side supply monitoring with a voltage monitoring range from 0 V to 20 V. The ADM1294 is designed for low-side supply monitoring. Its integrated shunt regulator allows it to be powered and to monitor supply in wide voltage ranges.

The ADM1293/ADM1294 are available in 4 mm × 4 mm 16-lead LFCSP and 14-lead TSSOP packages with a specified operating ambient temperature range from −40°C to +105°C for the ADM1293 and an operating junction temperature range from −40°C to +105°C for the ADM1294.

APPLICATIONS

  • Power monitoring/power budgeting
  • Central office equipment
  • Telecommunications and data communications equipment
  • PCs/servers

FEATURES and BENEFITS

  • Monitor current and two voltages
  • High accuracy current monitoring at low sense voltage
    0.33% accurate at ±20 mV sense voltage over temperature
  • Support high side and low side current sensing
  • Integrated shunt regulator for wide supply input
  • Reports current, voltage and power
  • Power accumulation for energy metering
  • Bidirectional current sensing
  • Digital programmable over current alert
  • See datasheet for additional features

Functional Block Diagram for ADM1293

Sample Requests

For device and evaluation board sample requests, please contact your local ADI sales representative.

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

ADM1294 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM1294-1AACPZ Status: Production LFCSP:LEADFRM CHIP SCALE 16 Ind Tray, 490 $4.94 $4.49 Y  Material Info Notify Me Purchase Sample
ADM1294-1AACPZ-RL7 Status: Production LFCSP:LEADFRM CHIP SCALE 16 Ind Reel, 1500 - $4.49 Y  Material Info Notify Me Purchase
ADM1294-1AARUZ Status: Production TSSOP 4.4 MM 14 Ind Tube, 96 - - Y  Material Info Notify Me Purchase Sample
ADM1294-1AARUZ-RL7 Status: Production TSSOP 4.4 MM 14 Ind Reel, 1000 - - Y  Material Info Notify Me Purchase
ADM1294-1BACPZ Status: Production LFCSP:LEADFRM CHIP SCALE 16 Ind Tray, 490 $3.29 $2.99 Y  Material Info Notify Me Purchase Sample
ADM1294-1BACPZ-RL7 Status: Production LFCSP:LEADFRM CHIP SCALE 16 Ind Reel, 1500 - $2.99 Y  Material Info Notify Me Purchase
ADM1294-1BARUZ Status: Production TSSOP 4.4 MM 14 Ind Tube, 96 - - Y  Material Info Notify Me Purchase Sample
ADM1294-1BARUZ-RL7 Status: Production TSSOP 4.4 MM 14 Ind Reel, 1000 - - Y  Material Info Notify Me Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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