Overview
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
Product Details
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 difference 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
Product Categories
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Product Lifecycle
Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation & Resources
Software & Systems Requirements
Evaluation Software
Hot-Swap & Power Monitoring Evaluation Software
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ADM1294-1AACPZ | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm) | |
| ADM1294-1AACPZ-RL7 | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm) | |
| ADM1294-1AARUZ | Material Declaration | Reliability Data | 14-Lead TSSOP | |
| ADM1294-1AARUZ-RL7 | Material Declaration | Reliability Data | 14-Lead TSSOP | |
| ADM1294-1BACPZ | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm) | |
| ADM1294-1BACPZ-RL7 | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm) | |
| ADM1294-1BARUZ | Material Declaration | Reliability Data | 14-Lead TSSOP | |
| ADM1294-1BARUZ-RL7 | Material Declaration | Reliability Data | 14-Lead TSSOP | |
| ADM1294-2AACPZ | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm) | |
| ADM1294-2AACPZ-RL | Material Declaration | Reliability Data | 16-Lead LFCSP (4mm x 4mm) | |
| Wafer Fabrication Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.