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Solutions Search - Current Sense Amplifiers

DC2561A - LTC2992 Demo Board:Dual Wide Range Power Monitor

Oct 24th 2017
Demonstration Circuit 2561A features the LTC®2992, a rail-to-rail system monitor that measures current, voltage, and power of two supplies. It features an operating range of 2.7V to 100V and includes a shunt regulator for supplies above 100V. The voltage measurement range of 0V to 100V is independent of the input supply. ...

Demo Board Linduino QuikEval System 

 

I2C Primer: What is I2C? (Part 1)

Hamza Salman Afzal - Applications Engineer Sep 2nd 2016
Introduction: The Inter-Integrated Circuit (I2C) bus is a two wire serial interface originally developed by the Phillips Corporation for use in consumer products. It is a bi-directional bus that is easily implemented in any IC process (NMOS, CMOS, bipolar) and allows for simple inter-IC communication. Connections are minimized ...

Blog Post 

 

LT8714 300kHz, Bidirectional 1A Current Source

Dec 17th 2015
The LT®8714 is a synchronous PWM DC/DC controller designed for a four quadrant output converter. The output voltage cleanly transitions through zero volts with sourcing and sinking output current capability. ...

Circuit 

 

Understanding Power Monitor Accuracy

Mark Thoren - Staff Scientist
Hamza Salman Afzal - Applications Engineer
Feb 20th 2015
Measurement of a system’s power consumption during a final factory test (before deployment into the field) is a prudent part of a test program for any product. But there is an increasing emphasis to bring this functionality into the product itself for “run-time” monitoring of power, current, supply voltage, ...

Blog Post 

 

DC2261A-B - LT6119-2 | Current Sense Amplifier, Reference and Comparators with POR

Feb 6th 2015
Demonstration circuit 2193A features the LT®6119, a high side current sense amplifier with comparators and a 400mV reference. The demo board circuit amplifies the voltage across an onboard current sense resistor, to provide a precision unipolar voltage output that is proportional to the sensed current. The board has two ...

Demo Board 

 

DC2261A-A - LT6119-1 | Current Sense Amplifier, Reference and Comparators with POR

Feb 6th 2015
Demonstration circuit 2193A features the LT®6119, a high side current sense amplifier with comparators and a 400mV reference. The demo board circuit amplifies the voltage across an onboard current sense resistor, to provide a precision unipolar voltage output that is proportional to the sensed current. The board has two ...

Demo Board 

 

DC2193A - LT6118 Demo Board | High Side Current Sense Amplifier with Reference and Comparator with POR Capability

Dec 8th 2014
Demonstration circuit 2193A features the LT®6118, a high side current sense amplifier with a comparator and a 400mV reference. The demo board circuit amplifies the voltage across an onboard current sense resistor, to provide a precision unipolar voltage output that is proportional to the sensed current. The board has one ...

Demo Board 

 

0V to 100V, 1% Accurate Energy Monitor Has 12-Bit Output

Sep 23rd 2014
MILPITAS, CA - September 23, 2014 - Linear Technology Corporation introduces the LTC2946, a high or low side charge, power and energy monitor for DC supply rails in the 0V to 100V range. An integrated ±0.4% accurate, 12-bit ADC and external precision time base (crystal or clock) enables measurement accuracy better than ±0.6% for ...

Press Release 

 

LTC6102 Simple 500V Current Monitor

Aug 4th 2014
The LTC®6102/LTC6102HV are versatile, high voltage, highside current sense amplifiers. Their high supply voltage rating allows their use in many high side applications, while the low drift and offset ensure accuracy across a wide range of operating conditions. The LTC6102-1 is a version of the LTC6102 that includes a low ...

Circuit LTspice 

 

LT6100 0A to 33A High Side Current Monitor with 12kHz Frequency Rolloff

Aug 4th 2014
The LT6100 sense inputs have a voltage range that extends from 4.1V to 48V, and can withstand a differential voltage of the full supply. This makes it possible to monitor the voltage across a MOSFET switch or a fuse. The part can also withstand a reverse battery condition on the inputs. ...

Circuit LTspice 

 

Altera Stratix V GX FPGA Development Kit

Jun 11th 2014
The Altera® Stratix® V GX FPGA Development Kit provides a complete design environment that includes all the hardware and software you need to begin developing FPGA designs immediately. The development kit is RoHS compliant. You can use this development kit to do the following: Develop and test PCI Express® (PCIe®) designs ...

Circuit 

 

Rail-to-Rail 80V Power Monitor Measures Current & Voltage with +/-0.75% Accuracy

Nov 7th 2012
MILPITAS, CA – November 7, 2012 – Linear Technology Corporation introduces the LTC2945, a wide range I²C system monitor that monitors the current, voltage and power of any 0V to 80V rail. In many cases, prior power monitoring solutions are limited to 3V to 5V supplies and monitor voltages less than 36V, requiring additional circuitry ...

Press Release 

 

DC1699A-B - LT6108-2 | High Side Current Sense Amplifier w/ Reference and a Comparator

Oct 6th 2011
DC1699A-B - Demo Board for:LT6108 - High Side Current Sense Amplifier with Reference and Comparator ...

Demo Board 

 

DC1699A-A - LT6108-1 | High Side Current Sense Amplifier w/ Reference and a Comparator

Oct 6th 2011
DC1699A-A - Demo Board for:LT6108 - High Side Current Sense Amplifier with Reference and Comparator ...

Demo Board 

 

Circuit Fault Protection with Very Fast Latching Load Disconnect

Sep 7th 2011
The LT6108 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and a comparator. Two versions of the LT6108 are available. The LT6108-1 has a latching comparator and the LT6108-2 has a non-latching comparator. In addition, the current sense amplifier ...

Circuit 

 

Overcurrent Battery Fault Protection

Sep 7th 2011
The LT6108 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and a comparator. Two versions of the LT6108 are available. The LT6108-1 has a latching comparator and the LT6108-2 has a non-latching comparator. In addition, the current sense amplifier ...

Circuit 

 

Energy-Tripped Circuit Breaker Trips After a Time Interval That Varies as a Function of Sensed Load Current

Sep 7th 2011
The circuit of this circuit has three distinct parts – circuit breaking, current sensing and timing. The circuit breaking function can be any type of electronically controlled relay or solid state switch, properly sized for voltage and current ratings of the load being protected. Load current sensing is achieved via an ...

Circuit 

 

Octal Voltage, Current & Temperature Monitor Provides Accurate Internal & Remote Measurements

Sep 1st 2011
MILPITAS, CA – September 1, 2011 – Linear Technology Corporation introduces the LTC2991, an 8-channel I²C temperature, voltage and current monitor for 3V and 5V systems. The LTC2991 is a highly integrated monitoring solution that incorporates a 14-bit ADC, 10ppm/°C voltage reference and I²C digital interface to provide submillivolt ...

Press Release 

 

DC1659A-B - LT6109-2 | High Side Current Sense with Reference and Comparators

Aug 17th 2011
DC1659A-B - Demo Board for:LT6109 - High Side Current Sense Amplifier with Reference and Comparators ...

Demo Board 

 

DC1659A-A - LT6109-1 | High Side Current Sense with Reference and Comparators

Aug 16th 2011
DC1659A-A - Demo Board for:LT6109 - High Side Current Sense Amplifier with Reference and Comparators ...

Demo Board 

 

60V Current Sense Amplifier Offers Adjustable Fault Flags

Jul 6th 2011
MILPITAS, CA – July 6, 2011 – Linear Technology announces the LT6109, a complete high side current sense device that incorporates a current sense amplifier, dual comparators and a precision 400mV voltage reference. When connected to a current shunt resistor, the high side current sense amplifier precisely extracts the shunt ...

Press Release 

 

Circuit Fault Protection with Latching Load Disconnect and Early Warning Indication

Jun 28th 2011
The LT6109 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and two comparators. Two versions of the LT6109 are available. The LT6109-1 has the comparators connected in opposing polarity and the LT6109-2 has the comparators connected in the same ...

Circuit 

 

Overcurrent and Undervoltage Battery Fault Protection

Jun 28th 2011
The LT6109 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and two comparators. Two versions of the LT6109 are available. The LT6109-1 has the comparators connected in opposing polarity and the LT6109-2 has the comparators connected in the same ...

Circuit 

 

LT6109 Simplified DC Motor Torque Control

Jun 28th 2011
The LT6109 is a complete high side current sense device that incorporates a precision current sense amplifier, an integrated voltage reference and two comparators. Two versions of the LT6109 are available. The LT6109-1 has the comparators connected in opposing polarity and the LT6109-2 has the comparators connected in the same ...

Circuit 

 

DC1698A-C - LT1999-50 (MS8) Demoboard

Mar 22nd 2011
DC1698A-C - Demo Board for:LT1999 - High Voltage, Bidirectional Current Sense Amplifier ...

Demo Board 

 

Precision Current Monitoring for Electric Motors, Solenoids and Inductive Loads

Cuyler Latorraca - Applications Engineer Mar 21st 2011
Current information in electric motors and solenoids provides important insight into power output and system health. Electric motor and solenoid driving circuits and the devices themselves create a challenging environment for operation of current monitoring circuits, with large common mode voltage shifts, fast switching currents ...

Video 

 

DC1698A-B - LT1999-20 (MS8) Demoboard

Jan 13th 2011
DC1698A-B - Demo Board for:LT1999 - High Voltage, Bidirectional Current Sense Amplifier ...

Demo Board 

 

DC1698A-A - LT1999-10 (MS8) Demoboard

Jan 13th 2011
DC1698A-A - Demo Board for:LT1999 - High Voltage, Bidirectional Current Sense Amplifier ...

Demo Board 

 

Bidirectional Current Sense Amplifier Operates from -5V to 80V with 80db of CMRR at 100 kHz

Nov 15th 2010
MILPITAS, CA - November 15, 2010 - Linear Technology announces the LT1999, a high-voltage amplifier designed for bidirectional current sensing in the presence of fast switching common-mode voltages from -5V to 80V. This wide input common-mode range is obtained with standard low voltage op amp supplies. A 2MHz bandwidth enables ...

Press Release 

 

Armature Current Monitor for DC Motor Applications

Nov 2nd 2010
The LT1999 is a high speed precision current sense amplifier, designed to monitor bidirectional currents over a wide common mode range. The LT1999 is offered in three gain options: 10V/V, 20V/V, and 50V/V. The LT1999 senses current via an external resistive shunt and generates an output voltage, indicating both magnitude and ...

Circuit 

 

Solenoid Current Monitor for Ground Tied Solenoid

Nov 2nd 2010
The common mode inputs to the LT1999 switch between Vs and one diode drop below ground. The LT1999 is a high speed precision current sense amplifier, designed to monitor bidirectional currents over a wide common mode range. The LT1999 is offered in three gain options: 10V/V, 20V/V, and 50V/V. The LT1999 senses current via ...

Circuit 

 

Digital Monitor Provides Accurate Internal & Remote Temperature Measurements

Sep 22nd 2010
MILPITAS, CA - September 22, 2010 - Linear Technology Corporation introduces the LTC2990, an I2C temperature and voltage monitor for 3V and 5V systems. Many emerging, low voltage systems today rely on monitoring ICs to relay parametric data used in assessing overall system health and reliability. Traditional ADC implementations ...

Press Release 

 

DC1536A - LTC6102-1 Current Sense Demo Board with Enable Feature

Feb 17th 2010
DC1536A - Demo Board for:LTC6102 - Precision Zero Drift Current Sense Amplifier ...

Demo Board 

 

DC907A-B - LTC6102, LT6100, LT1787, LTC2054, and LTC2439-1 (Requires DC590B) | Demo Board

Oct 22nd 2009
DC907A-B - Demo Board for:LTC2054 - Single Micropower Zero-Drift Operational AmplifiersLTC6102 - Precision Zero Drift Current Sense AmplifierLT1787 - Precision, High Side Current Sense AmplifiersLT6100 - Precision, Gain Selectable High Side Current Sense AmplifierLTC2439-1 - 8-/16-Channel 16-Bit No Latency Delta Sigma ADC ...

Demo Board QuikEval System 

 

Simple Ways To Measure Current - LTC6101, LTC6102, LTC6103, LTC6104

Jon Munson - Applications Engineer Mar 15th 2009
Measuring current is one of the basic requirements in many electronic systems; whether for precise control or simple protection of circuit elements. A family of new devices from Linear Technology has been produced to greatly simplify the measurement of DC or AC current. Using only external resistors, each small device can be ...

Video 

 

Current Sense Amplifier Operates from -55°C to 150°C

Jun 3rd 2008
MILPITAS, CA - June 3, 2008 - Linear Technology announces the LT6107, a Military Plastic grade (MP-grade) high side current sense amplifier specified for operation from –55°C to 150°C. As an MP-grade device, the LT6107 is guaranteed and tested across the specified temperature range and is intended to meet the demands of automotive, ...

Press Release 

 

DC1363A - LT6107-General Purpose High-Side Current-Sense Amplifier featuring the LT6107

May 12th 2008
DC1363A - Demo Board for:LT6107 - High Temperature High Side Current Sense Amp in SOT-23 ...

Demo Board 

 

High-Side Power Monitor Measures Both Current and Voltage up to 80V

Feb 18th 2008
MILPITAS, CA – February 18, 2008 – Linear Technology Corporation introduces the LTC4151, a high side power monitor that measures current and input voltages from 7V to 80V. The LTC4151 utilizes an internal 12-bit ADC to continuously measure both high side current and input voltage to give a true power reading. The LTC4151 replaces ...

Press Release 

 

DC1208A - LTC4151 Demo Board | 80V High Side Power Monitor, req. DC2026

Jan 25th 2008
Demonstration circuit 1208A features the LTC4151 high side power monitor that accepts input voltages from 7V to 80V. In default operation mode, the onboard 12-bit ADC continuously measures high side current, input voltage and an external voltage. Data is reported through the I2C interface when polled by a host. The monitors ...

Demo Board Linduino QuikEval System 

 

High Side Current Sense Amplifier Features Input Range from –0.3V to 44V & 300uV Offset

Dec 10th 2007
MILPITAS, CA - December 10, 2007 - Linear Technology announces the LT6105, a precision current sense amplifier with an input common mode range that extends from -0.3V below V-, up to 44V above V-. The common mode range of the LT6105 is independent of the positive supply voltage, making it ideal for a wide range of applications. ...

Press Release 

 

Solenoid is Pulled High to 24V, Freewheels Low to a Schottky Below Ground

Sep 7th 2007
The large input common mode range of the LT6105 makes it suitable for monitoring currents in quarter, half and full bridge inductive load driving applications.This circuit shows an example of a quarter bridge. The MOSFET pulls down on the bottom of the solenoid to increase solenoid current. It lets go to decrease current, and ...

Circuit 

 

DC1192A - LT6105 Current Sense Demo Board

Sep 7th 2007
DC1192A - Demo Board for:LT6105 - Precision, Rail-to-Rail Input Current Sense Amplifier ...

Demo Board 

 

The LT6105 Can Monitor the Current of Either Positive or Negative Supplies, Without a Schematic Change.

Sep 7th 2007
Positive or negative current flow is measured by just swapping inputs, -IN connected to most negative side of sense resistor. +IN is connected to most positive side of sense resistor. ...

Circuit 

 

LT6105 Current Sense Amplifier Monitors Both +15V and -15V Supplies

Greg Zimmer - Senior Product Marketing Engineer Sep 7th 2007
The input common mode range of the LT6105 also makes it suitable for monitoring either positive or negative supplies. The circuit below shows one LT6105 applied as a simple positive supply monitor, and another LT6105 as a simple negative supply monitor. Note that the schematics are practically identical and both have outputs ...

Circuit LTspice 

 

105V High Side Current Sense Amplifier with 10uV Offset & Zero Drift

Jul 18th 2007
MILPITAS, CA - July 18, 2007 - Linear Technology announces the LTC6102, the most precise high side current sense amplifier available. Maximum input offset voltage of the LTC6102 is only 10uV and it can accept differential sense voltages up to 2V. The resulting 106dB of dynamic range allows the LTC6102 to resolve micro-amps from ...

Press Release 

 

Ultraprecise Current Sensing with LTC6102

Jun 15th 2007
Very low input offset allows using low value resistors while maintaining high measurement resolution. Using low value also reduces power losses and temperature rise. ...

Circuit 

 

Bidirectional Current Sense Circuit with Separate Charge/Discharge Output

Jun 15th 2007
The LTC6102/LTC6102HV monitor current via the voltage across an external sense resistor (shunt resistor). Internal circuitry converts input voltage to output current, allowing a small sense signal on a large common mode voltage to be translated to a ground-referred signal. Low DC offset allows the use of very low shunt resistor ...

Circuit 

 

High Voltage/Current and Temperature Monitoring

Jun 15th 2007
The LTC2990 is used to monitor system temperatures, voltages and currents. Through the I2C serial interface, the device can be configured to measure many combinations of internal temperature, remote temperature, remote voltage, remote current and internal VCC. The internal 10ppm/°C reference minimizes the number of supporting ...

Circuit 

 

DC1113A - LTC6102 Current Sense Demo Board

Jun 15th 2007
DC1113A - Demo Board for:LTC6102 - Precision Zero Drift Current Sense Amplifier ...

Demo Board 

 

Low Cost 36V Current Sense Amplifier Offers Precision in a SOT-23

May 9th 2007
MILPITAS, CA - May 9, 2007 - Linear Technology announces the LT6106, a low cost, high side current sense amplifier that can resolve small differential signals from common mode voltages up to 36V. With only 250uV(max) of input offset voltage and a full-scale differential input of 500mV, the LT6106 offers a dynamic range of 2000:1. ...

Press Release 

 

DC1240A - LT6106 Current Sense Demo Board

Apr 16th 2007
DC1240A - Demo Board for:LT6106 - Low Cost, 36V High Side Current Sense Amplifier ...

Demo Board 

 

Precision Bidirectional 70V Current Sense Amplifier Offers Unprecedented Flexibility

Feb 7th 2007
MILPITAS, CA - February 7, 2007 - Linear Technology Corporation announces the LTC6104, a unique high-side current sense amplifier composed of two complete amplifiers with a combined single bipolar output. The dual amplifier topology is ideal for bidirectional operation and provides exceptional flexibility via gain programmability ...

Press Release 

 

Dual 60V Current Sense Amplifiers Feature Fast Response, Precision & Flexibility

Jan 31st 2007
MILPITAS, CA - January 31, 2007 - Linear Technology's LTC6103 contains two independent, high side current sense amplifiers with exceptional precision and response time. As a dual, the LTC6103 is ideal for multiple current sensing applications such as H-bridge driver circuits. The unique topology also allows the second amplifier ...

Press Release 

 

DC1117A - LTC6104 Current Sense Demo Board

Jan 17th 2007
DC1117A - Demo Board for:LTC6104 - High Voltage, High Side, Bi-Directional Current Sense Amplifier ...

Demo Board 

 

Bidirectional H-Bridge Monitoring with Single-Ended Output

Jan 17th 2007
The output structure of the LTC6104 provides a single bidirectional signal. The output connection can either source or sink current to a load resistance, depending on which input channel is sensing current fl ow. A negative-going output swing remains linear as long as Pin 4 (V–) is lower than the lowest expected output level ...

Circuit 

 

DC1116A - LTC6103 Current Sense Demo Board

Jan 15th 2007
DC1116A - Demo Board for:LTC6103 - Dual High Voltage, High Side Current Sense Amplifier ...

Demo Board 

 

Bidirectional H-Bridge Monitoring with ADC-Friendly Differential Output

Jan 15th 2007
The dual outputs of the LTC6103 can be used individually to provide overload detection, and/or may be taken as a differential pair to provide a bidirectional signal to an analog-to-digital converter (ADC) for example. Figure 3 shows a typical circuit for a generic H-bridge application. The power devices may be complementary ...

Circuit 

 

High Side Current Sense and Fuse Monitor

May 6th 2005
The LT6100 can be used as a combination current sensor and fuse monitor. This part includes on-chip output buffering and was designed to operate with the low supply voltage (≥2.7V), typical of vehicle data acquisition systems, while the sense inputs monitor signals at the higher battery bus potential. The LT6100 inputs are ...

Circuit 

 

DC1114A - LT6100 Current Sense Demo Board

May 6th 2005
DC1114A - Demo Board for:LT6100 - Precision, Gain Selectable High Side Current Sense Amplifier ...

Demo Board 

 

High-Side Transimpedance Amplifier & APD Monitor

Mar 17th 2005
Current through a photodiode with a large reverse bias potential is converted to a ground referenced output voltage directly through an LTC6101. The supply rail can be as high as 70V. Gain of the I to V conversion, the trans- impedance, is set by the selection of resistor RL. ...

Circuit 

 

48V Supply Current Monitor with Isolated Output and 105V Survivability

Mar 17th 2005
The HV version of the LTC6101 can operate with a total supply voltage of 105V. Current flow in high supply voltage rails can be monitored directly or in an isolated fashion as shown in this circuit. The gain of the circuit and the level of output current from the LTC6101 depends on the particular opto-isolator used. ...

Circuit 

 

Simple 500V High Side Current Monitor

Mar 17th 2005
Adding two external Mosfets to hold off the voltage al-lows the LTC6101 to connect to very high potentials and monitor the current flow. The output current from the LTC6101, which is proportional to the sensed input volt-age, flows through M1 to create a ground referenced output voltage. ...

Circuit 

 

DC1115A - LTC6101 Current Sense Demo Board

Mar 17th 2005
DC1115A - Demo Board for:LTC6101 - High Voltage, High-Side Current Sense Amplifier in SOT-23 ...

Demo Board 

 

LTC6101/LT3021 Voltage Controlled Current Source

Mar 16th 2005
Adding a current sense amplifier in the feedback loop of an adjustable low dropout voltage regulator creates a simple voltage controlled current source. The range of output current sourced by the circuit is set only by the current capability of the voltage regulator. The current sense amplifier senses the output current and ...

Circuit LTspice 

 

16-Bit Resolution Unidirectional Current Sense into LTC2433 ADC

Jun 18th 2003
The LTC2433-1 can accurately digitize signal with source impedances up to 5kΩ. This LTC6101 current sense circuit uses a 4.99kΩ output resistance to meet this requirement, thus no additional buffering is necessary. ...

Circuit 

 

Low Power, Bidirectional 60V Precision Hi Side Current Sense

Aug 26th 1999
Using a very precise zero-drift amplifier as a pre-amp allows for the use of a very small sense resistor in a high voltage supply line. A floating power supply regulates the voltage across the pre-amplifier on any voltage rail up to the 60V limit of the LT1787HV circuit. Overall gain of this circuit is 1000. A 1mA change in ...

Circuit 

 

Bidirectional Battery-Current Monitor

Aug 26th 1999
This circuit provides the capability of monitoring current in either direction through the sense resistor. To allow negative outputs to represent charging current, VEE is connected to a small negative supply. In single-supply operation (VEE at ground), the output range may be offset upwards by applying a positive reference level ...

Circuit 

 

Split or Single Supply Operation, Bidirectional Output into A/D

Aug 8th 1998
In this circuit, split supply operation is used on both the LT1787 and LT1404 to provide a symmetric bidirectional measurement. In the single-supply case, where the LT1787 pin 6 is driven by VREF, the bidirectional measurement range is slightly asymmetric due to VREF being somewhat greater than mid-span of the ADC input range. ...

Circuit