LT2940: Power and Current Monitor Data Sheet11/30/2009342K
Features and Benefits
- Four-Quadrant Power Measurement
- ±5% Power Measurement Accuracy
- 4V to 80V High Side Sense, 100V Max
- Current Mode Power and Current Outputs
- Output Bandwidth Exceeds 500kHz
- ±3% Current Measurement Accuracy
- 6V to 80V Supply Range, 100V Max
- Inverting and Noninverting Open-Collector Comparator Outputs
- Available in 12-Pin DFN (3mm × 3mm) and 12-Lead MSOP Packages
The LT2940 measures a high side current and a differential voltage, multiplies them and outputs a current proportional to instantaneous power. Bidirectional high side currents and bipolar voltage differences are correctly handled by the four-quadrant multiplier and push-pull output stage, which allows the LT2940 to indicate forward and reverse power flow.
An integrated comparator with inverting and noninverting open-collector outputs makes the LT2940 a complete power level monitor. In addition, an output current proportional to the sensed high side current allows current monitoring. The current mode outputs make scaling, filtering and time integration as simple as selecting external resistors and/or capacitors.
- Board Level Power and Current Monitoring
- Line Card and Server Power Monitoring
- Power Sense Circuit Breaker
- Power Control Loops
- Power/Energy Meters
- Battery Charger Metering
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
DC1495A: Demo Board for the LT2940 Power and Current Monitor.
Documentation & Resources
R553 Reliability Data3/23/201828 K
DC1495A - Demo Manual2/22/2010117K
Precision High Side Current Sense Amplifiers7/13/20171M
Power and Thermal Monitoring1/9/20171M
LT2940 - True Analog Power and Current Monitoring6/29/2010487K
LT2940 Video Product Brief10/15/2018
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|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LT2940CDD#PBF||Material Declaration||Reliability Data||12-Lead DFN (3mm x 3mm w/ EP)|
|LT2940CDD#TRPBF||Material Declaration||Reliability Data||12-Lead DFN (3mm x 3mm w/ EP)|
|LT2940CMS#PBF||Material Declaration||Reliability Data||12-Lead MSOP|
|LT2940CMS#TRPBF||Material Declaration||Reliability Data||12-Lead MSOP|
|LT2940IDD#PBF||Material Declaration||Reliability Data||12-Lead DFN (3mm x 3mm w/ EP)|
|LT2940IDD#TRPBF||Material Declaration||Reliability Data||12-Lead DFN (3mm x 3mm w/ EP)|
|LT2940IMS#PBF||Material Declaration||Reliability Data||12-Lead MSOP|
|LT2940IMS#TRPBF||Material Declaration||Reliability Data||12-Lead MSOP|
|Wafer Fabrication Data||R553 Reliability Data|
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