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Solutions Search - Comparators

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 

 

High Accuracy, μPower, Over-Voltage Detector with Glitch Suppressor Using LTC1541 and LTC6994

May 4th 2016
An overvoltage detector which suppresses glitches is constructed from the LTC®1541 micropower op amp + comparator + voltage reference and LTC6994-1 TimerBlox® delay block/debouncer. In this circuit, the LTC1541 comparator detects power rail overvoltage conditions (including glitches). The built-in op amp inverts this ...

Circuit LTspice 

 

A New Era in Space Products - Radiation Tolerant

T.J. Fure - Product Marketing Manager
Gabino Alonso - Strategic Marketing Engineer
Mar 23rd 2016
Recent developments have made doing business in space ever more achievable to a broadening base of companies. A market previously consisting solely of major defense contractors and national governments has been disrupted by a growing list of commercial companies determined to deploy an enterprise beyond the confines of our terrestrial ...

Blog Post 

 

Parameters that Affect Comparator Propagation Delay Measurements

Kevin B. Scott - Senior Strategic Marketing Engineer Nov 4th 2015
One of the key specifications for a comparator is propagation delay - the amount of time it takes for a signal propagate from the comparator input to the output. Whether as a threshold detector in a battery powered application, or on a high speed signal processing board, the comparator's propagation delay is often the first ...

Blog Post 

 

New LVDS Output Comparators Toggle Beyond 890Mbps

Sep 23rd 2015
MILPITAS, CA - September 23, 2015 - Linear Technology Corporation announces the LTC6754, a high speed LVDS output comparator capable of toggle rates up to 890Mbps. This extremely fast comparator operates with only 1.8ns of propagation delay, 1ns of overdrive dispersion, and 1.5psRMS of jitter. Combined, these features address ...

Press Release 

 

LT6703 μPower Supply Voltage Monitor with 2V Hysteresis

Mar 17th 2015
The LT6703 µPower, low voltage comparator and reference offers a single comparator and accurate reference in a 2mm × 2mm DFN package. The -3 version is has a non-inverting input. Although only one of its comparator inputs is accessible (the other is connected to a 400mV internal precision voltage reference) its size ...

Blog Post Circuit LTspice 

 

Industry's Fastest Comparators Drive 1.8V Logic Beyond 280MHz

Mar 11th 2015
MILPITAS, CA - March 11, 2015 - Linear Technology Corporation announces the LTC6752 family of comparators with fast rise and fall times of 1.2ns and a toggle frequency of 280MHz, making them the fastest CMOS output comparators available today. Designed for driving logic levels from 3.3V down to 1.8V, the LTC6752 exhibits only ...

Press Release 

 

Versatile Comparators Enable Fast Signal Detection, Level Translation and Clock Recovery

Asit Shankar - Senior Design Engineer Jan 27th 2015
In this video, a new high speed CMOS output comparator family, the LTC6752, is introduced. The comparators exhibit extremely high toggle rates of 280 MHz and very low propagation delays of only 2.9ns. An overview of important features and specifications is presented. A brief description of each of the five members of the family ...

Video 

 

LTC6752 Pulse Stretcher Circuit/Monostable Multivibrator

Dec 16th 2014
For detecting short pulses from a single sensor, a pulse stretcher is often required. The circuit of the figure above acts as a one-shot, stretching the width of an incoming pulse to a consistent ~100ns. The circuit works as follows: Comparator U1 functions as a threshold detector, and Comparator U2 functions as a one-shot. ...

Circuit LTspice 

 

LTC6752 Optical Receiver Circuit

Dec 16th 2014
The LTC6752, along with a high speed high performance FET input operational amplifier like the LTC6268, can be used to implement an optical receiver as shown above. The figure shows the output of the LTC6268 driving the –IN pin of the LTC6752-2, the +IN pin of the LTC6752-2, and the LTC6752 output. The photodiode is being ...

Circuit 

 

LTC6752 200MHz Clock Restoration/Level Shifting

Dec 16th 2014
High speed comparators are often used in digital systems to recover distorted clock waveforms. The separate input/ output supplies feature of the LTC6752-2 allows it to be used in applications where signals need to be shifted from one voltage domain to another. The circuit above can perform both recovery and level translation ...

Circuit 

 

LTC4000 48V to 10.8V at 10A Buck Converter 3-Cell LiFePO4 Battery Charger with 2.9h Termination Timer, 1.25A Trickle Charge Current and Charging PFET Thermal Protection

Sep 23rd 2014
The LTC®4000 is a high voltage, high performance controller that converts many externally compensated DC/DC power supplies into full-featured battery chargers. ...

Circuit 

 

LT1116 Fast Zero Crossing Detector

Aug 7th 2014
The LT1116 is an ultra fast (12ns) comparator designed for sensing signals near the negative supply. The input common mode range extends from 2.5V below the positive supply down to the negative supply rail. Like the LT1016, this comparator is specifically designed to interface directly to TTL logic with complementary outputs. ...

Circuit LTspice 

 

Dual Output Sine Wave to Logic Converter Utilizes Selectable Input Filtering for Lowest Additive Jitter

Apr 8th 2013
MILPITAS, CA – April 8, 2013 – MILPITAS, CA – Linear Technology Corporation introduces the LTC6957, a DC to 300MHz dual output buffer/driver/logic translator, ideal for converting sine waves into low phase noise logic level signals. Prior solutions were unable to perform this conversion without introducing a significant amount ...

Press Release 

 

LTC2960 Window Comparator for High Voltage Input

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LTC2960 Battery Disconnect to Protect Against Deep Discharge

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LTC2960 Micropower Power Supply Sequencer and Supervisor

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LTC2960 Automotive Supervisor

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LTC2960 Li-Ion Battery and Regulator Monitor

Mar 21st 2012
The LTC®2960 is a nano-current, high voltage two-input voltage monitor, ideally suited for multicell battery applications. External resistive dividers configure custom comparator thresholds. The supervisory circuit monitors the ADJ input and pulls the RST output low when the input drops below threshold. A reset timeout period ...

Circuit 

 

LT2940 28V Power to Frequency Converter

Nov 30th 2009
In some environments isolation is necessary for safety or noise reasons. The circuit above shows a power-to-frequency converter using the LT2940. The PMON output alternately charges and discharges a film capacitor, C5. When the voltage on C5 charges to the upper threshold on hysteretic comparator LTC1440, its output flips the ...

Circuit 

 

Tiny 3.2 MHz Dual Micropower Comparator Operates Below 2 Volts with 60uA Iq

Sep 26th 2007
MILPITAS, CA - September 26, 2007 - Linear Technology Corporation announces the LTC6702, a fast, micropower dual comparator in a 2mm x 2mm DFN package. With operation down to 1.7V and less than 60uA of maximum current consumption, this tiny device is ideal for portable and battery operated equipment. Low voltage operation is ...

Press Release 

 

Dual Output, Buffered Reference (On Single 3V Supply)

Apr 18th 2003
The amplifier configuration establishes the reference voltage across the 75k resistor. A fixed current is then forced into the 46.4k resistor and sets the lower output voltage. The upper voltage output is greater than the lower voltage output by the reference voltage. ...

Circuit 

 

DC548A - LTC1921CMS8 | Dual -48V Suppy and Fuse Monitor

May 10th 2002
DC548A - Demo Board for:LTC1921 - Dual -48V Supply and Fuse Monitor ...

Demo Board 

 

LT1715 Rail-to-Rail 1MHz Pulse Width Modulator

Jun 1st 2001
In applications where a high frequency variable PWM generator is needed, the LT1715 provides a small and simple solution, as shown in the circuit of Figure 10. The top comparator, U1A, acts as a ramp generator. Biasing resistors R1 and R2 and a 7:1 positive feedback ratio through R3 set the positive input to approximately 2.5V±250mV. ...

Circuit LTspice 

 

Clock Tunable, Filter Based Sine Wave Generator

Nov 13th 2000
A feedback loop enclosed resonator can be made to oscillate. This circuit’s sine wave generator takes advantage of this and eliminates the need for an amplitude control loop. This circuit, a mildly modified form of the Regan resonant bandpass loop, is clock tunable and produces sine and cosine outputs. ...

Circuit 

 

LT1721 Pulse Generator Has 0ns to 10ns Width, 520ps Transitions

Oct 13th 1999
It is sometimes desirable to produce extremely short width pulses in response to an input trigger. Such a predictable, programmable short time interval generator has broad use in fast pulse circuitry, particularly in sampling applications. This circuit, built around a quad high speed comparator and a fast gate, has a settable ...

Circuit LTspice 

 

DC600A - LTC1540CDD | Nano-power Voltage Comparator with Built In Voltage Reference in DFN Package

Jul 12th 1999
...

Demo Board 

 

Dual Limit Microvolt Comparator

Jan 1st 1998
Low offset precision amplifiers make very accurate comparators. This is a window comparator when an output LED indicates that the input is outside of the window. Hysteresis to ensure smooth switching is provided to one of the offset nulling terminals with minimal impact on offset and therefore threshold accuracy. ...

Circuit 

 

Microvolt Comparator with Hysteresis

Jan 1st 1998
Very low offset, 20uV typical, can produce extremely accurate comparator functions. Small input voltages can produce oscillations without hysteresis. Here hysteresis is added to a Vos trim pin to as to not degrade the input precision. ...

Circuit 

 

DC601A - LTC1541CDD | Micro-power Combination Op Amp, Comparator and Voltage Reference in DFN Package

Sep 22nd 1997
...

Demo Board 

 

Pilot Light Flame Detector with Low-Battery Lockout using a Type R Thermocouple

Sep 22nd 1997
The LTC1541 combine a micropower amplifier, comparator and bandgap reference in an 8-pin package. The part operates from a single 2.5V to 12.6V or dual ±1.25V to ±6.3V supply with a typical supply current of 5µA. Both the op amp and comparator feature a common mode input voltage range that extends from the negative supply ...

Circuit 

 

Low Power Comparator with <10uV Hysteresis

Dec 1st 1989
The opamp is used as a precision comparator that drives an NPN transistor to form a logic-level output. Controlled positive feedback into a trim pin makes precision microvolt hysteresis control practical. ...

Circuit 

 

5V Powered Thermistor Heating/Cooling Automatic Thermostat

Jan 1st 1987
The LTC1040 is a monolithic CMOS dual comparator manufactured using Linear Technology’s enhanced LTCMOSTM silicon gate process. Extremely low operating power levels are achieved by internally switching the comparator ON for short periods of time. The CMOS output logic holds the output information continuously while not consuming ...

Circuit 

 

2-Wire Thermistor 0°C to 100°C Temperature Transducer with 4mA to 20mA Output

Jan 1st 1987
The LTC1040 is a monolithic CMOS dual comparator manufactured using Linear Technology’s enhanced LTCMOSTM silicon gate process. Extremely low operating power levels are achieved by internally switching the comparator ON for short periods of time. The CMOS output logic holds the output information continuously while not consuming ...

Circuit 

 

LTC6990/LTC1440/LTC1059 Quadrature Sine Wave Oscillator

Jan 1st 1987
This circuit provides a voltage controlled frequency range from 2Hz to 18kHz with 1Vp-p constant putput amplitude. The LTC6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox ...

Circuit 

 

Microvolt Compararator with TTL Output

Nov 1st 1983
Amplifiers can easily be used as comparators although somewhat slower than dedicated circuits. Very accurate comparison threshold is provided by the low offset of the amplifier. Feedback to one of the offset adjust pins adds hysteresis to prevent oscillations when the inputs are close to each other. ...

Circuit