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Solutions Search - AC Current Sense

LT6018 Low Noise Precision Current Monitor

Jun 14th 2017
The LT®6018 is a 33V precision operational amplifier with excellent noise performance. With 0.1Hz to 10Hz noise of only 30nVP-P, the LT6018 is an outstanding choice for applications where 1/f noise impacts system performance. The LT6018 has excellent DC performance with a maximum offset voltage of 50μV and a maximum offset ...

Circuit LTspice 

 

LT1997-3 - Single Supply Current Sense

Jun 14th 2017
Sense resistors R1 converts a current into a voltage. This voltage is buffered (gain of 1) from the input to the output in this amplifier. V1 tests the circuit for response to common mode variation. A simulation will show that the output voltage variation due to the common mode voltage V1 is very small.     The ...

Circuit LTspice 

 

LT6703 AC Line Overcurrent Indicator

Philip Lane - Field Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Scott Olson - Associate Engineer
Jun 4th 2016
Circuit Description This circuit design is to monitor the average current in an AC line-connected load and to illuminate an LED if it exceeds a specified level. µPower, Low Voltage Comparator with Reference The basis of this design is the LT6703-2 which combines a micropower, low voltage comparator with a 400mV reference ...

Blog Post Circuit LTspice 

 

LT2940 AC Power and Current Monitor

Nov 30th 2009
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 ...

Circuit 

 

Secondary-Side AC Circuit Breaker

Nov 30th 2009
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 ...

Circuit 

 

LT2940 Fully Isolated AC Power and Current Monitor

Nov 30th 2009
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 ...

Circuit 

 

Sub-Microamp RMS Current Measurement for Improved 32kHz Quartz Crystal Performance - LT1028, LT1222, LTC1563-2, LTC1968, LT1077

Jim Williams - Applications Guru Jun 15th 2008
Quartz crystal RMS operating current is critical to long-term stability, temperature coefficient and reliability. Accurate determination of RMS crystal current, especially in micropower types, is complicated by the necessity to minimize introduced parasitics, particulary capacitance, which corrupt crystal operation. This video ...

Video 

 

LTC1966 AC Current Measurement

Nov 29th 2001
The LTC1966 is a true RMS-to-DC converter that utilizes an innovative patented DS computational technique. The internal delta-sigma circuitry of the LTC1966 makes it simpler to use, more accurate, lower power and dramatically more flexible than conventional log-antilog RMS-to-DC converters. ...

Circuit LTspice 

 

Isolated Power Line Monitor with 0.5% Accuracy Over 90VAC to 130VAC Input

Jan 1st 1998
This circuits AC power line monitor has 0.5% accuracy over a sensed 90VAC to 130VAC input and provides a safe, fully isolated output. RMS conversion provides accurate reporting of AC line voltage regardless of waveform distortion, which is common. ...

Circuit