Key facts
- Brand
- Linear Technology
- Model
- LT2940
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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Linear Technology LT2940 Power Monitor Application Note
The Linear Technology LT2940 is an analog multiplier designed to continuously monitor instantaneous power by simultaneously measuring voltage and current. It simplifies design in power control loops where traditional multipliers lack the necessary operating range or sensitivity, and digital solutions cannot respond rapidly enough.
Key features include a wide 4V to 80V high-side current sense range, full 4-quadrant operation for bidirectional power flow, and a bandwidth of 50kHz. The device provides current-mode outputs (PMON and IMON) suitable for servo loops and includes an integrated comparator with selectable latching for direct control applications.
Linear Technology LT2940 specifications
| 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 |
Source: LINEAR 2PB_2940a True Analog Power Current Monitoring
All Linear Technology LT2940 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the operating voltage range for the LT2940?
The device operates with a supply voltage ranging from 4V to 8V.
From: Linear Technology LT2940 Power Monitor Application Note
What is the maximum differential input for the current sense pins?
The current sense inputs can measure up to +200mV differentially.
From: Linear Technology LT2940 Power Monitor Application Note
What is the bandwidth of the LT2940?
The LT2940 has a bandwidth of 500kHz.
Does the LT2940 support bidirectional currents?
Yes, it uses 4-quadrant multiplication to handle bidirectional currents and bipolar voltages.