The document describes the features and characteristics of the LT2940 power and current monitor produced by Linear Technology Corporation. The monitor can be used in a voltage range of 4V to 80V, has a 4-quadrant analog multiplier, outputs 500kHz bandwidth, and can measure positive and reverse currents and voltages. Applications include board-level power and current monitoring, line card and server power monitoring, power circuit breaker, MOSFET power monitoring, power/energy meters, battery charger metering, and power control loops.
The LT2940 is a power and current monitor designed for 4V to 80V systems. It utilizes a true 4-quadrant analog multiplier to provide continuous results with a 500kHz bandwidth, making it ideal for pulsed, chopped AC, and control applications where traditional data converters are insufficient.
The device offers high-side sense capabilities up to 100V max and provides both power measurement accuracy of ±5% and current measurement accuracy of ±3%. It features inverting and noninverting open-collector comparator outputs and is available in 12-Pin DFN and 12-Lead MSOP packages.
| Supply Range | 6V to 80V |
|---|---|
| Max Sense Voltage | 100V |
| Bandwidth | 500kHz |
| Power Measurement Accuracy | +/- 5% |
| Current Measurement Accuracy | +/- 3% |
| Packages | 12-Pin DFN and 12-Lead MSOP |
The LT2940 has a bandwidth of 500kHz.
Yes, it uses 4-quadrant multiplication to handle bidirectional currents and bipolar voltages.
The device supports a high-side sense up to 100V max.