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Solutions Search - Thermistor Solutions

LTC2984 Thermocouple Measurement with Automatic Cold Junction Compensation

Jun 17th 2015
The LTC®2984 measures a wide variety of temperature sensors and digitally outputs the result, in °C or °F, with 0.1°C accuracy and 0.001°C resolution. The LTC2984 can measure the temperature of virtually all standard (type B, E, J, K, N, S, R, T) or custom thermocouples, automatically compensate for cold ...

Circuit 

 

LTC2983 Thermocouple Measurement with Automatic Cold Junction Compensation

Nov 10th 2014
The LTC®2983 measures a wide variety of temperature sensors and digitally outputs the result, in °C or °F, with 0.1°C accuracy and 0.001°C resolution. The LTC2983 can measure the temperature of virtually all standard (type B, E, J, K, N, S, R, T) or custom thermocouples, automatically compensate for cold ...

Circuit 

 

Product How-to: Precise Wireless Temperature Sensor Powers Itself

Jun 13th 2014
In case you missed it, LTC’s Kris Lokere recently wrote an article for EDN describing a circuit combining Dust, Energy Harvesting, and precision temperature sensing. Specifically, it describes a reference circuit showcasing: Dust Networks wireless - LTP5901-IPM SmartMesh IP Mote Energy Harvesting - LTC3330 Nanopower ...

Blog Post 

 

LTC6990 Full Range Temperature to Frequency Converter. 16kHz to 1kHz from –20°C to 80°C

May 12th 2010
The LTC®6990 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® family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6990’s internal ...

Circuit 

 

Temperature to Frequency Converter

May 12th 2010
3% Linearity from –20°C (Fout = 20kHz) to 75°C (Fout = 25kHz) 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 family of versatile silicon timing devices. ...

Circuit 

 

Ratiometric Sensor to Pulse Width, Non-Inverting Response

May 12th 2010
The LTC6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6992’s internal master oscillator frequency. The output frequency is determined ...

Circuit 

 

2-Terminal Temperature-to-Current Thermometer Suitable for Use at the End of Long Wire Runs

Apr 22nd 2009
By adding the LT3092 to the thermistor kit along with three 0.1% accuracy resistors and one fi nal trim, a very accurate 2-terminal temperature-to-current converter can be built. This circuit measures 700μA operating current at 0°C, dropping by 2μA every degree until 100°C, at which point the current measures 500μA. The ...

Circuit 

 

2-Terminal Temperature-to-Current Thermometer Suitable for Use at the End of Long Wire Runs

Apr 22nd 2009
By adding the LT3092 to a thermistor kit along with three 0.1% accuracy resistors and one final trim, a very accurate 2-terminal temperature-to-current converter can be built. This circuit measures 700μA operating current at 0°C, dropping by 2μA every degree until 100°C, at which point the current measures 500μA. The obvious ...

Circuit 

 

Temperature Monitoring with an NTC Thermistor While Measuring Load Current and LTC4151 Supply Current

Jan 25th 2008
The LTC4151 is a high side power monitor that operates over a wide voltage range of 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 LTC4151 can also perform on-demand ...

Circuit 

 

10°C to 40°C Thermistor Thermometer

Oct 26th 2001
The LT1789 is a micropower, precision instrumentation amplifiers that are optimized for single supply operation from 2.2V to 36V. The quiescent current is 95μA max, the inputs common mode to ground and the output swings within 110mV of ground. The gain is set with a single external resistor for a gain range of 1 to 1000 for ...

Circuit 

 

Temperature To Frequency Converter

Jan 30th 2001
This circuit directly converts temperature to digital data. In this case, a thermistor sensor biases the RSET pin. The LTC1799 frequency output is predictable, although nonlinear. The inverse RSET vs frequency relationship combines with the thermistor’s nonlinear characteristic to give Figure 8’s data. The curve is nonlinear, ...

Circuit 

 

Pseudodifferential Multichannel Bridge Digitizer and Digital Cold Junction Compensation

Mar 15th 2000
This circuit enables pseudodifferential measurements of several bridge transducers and absolute temperature measurement. Consecutive readings are performed on each side of the bridge by selecting the appropriate channel on the LTC2428. Each output is digitized and the results digitally subtracted to obtain the pseudodifferential ...

Circuit 

 

A Galvanically Isolated Thermistor Digitizer

Dec 3rd 1997
The LTC1799 is a precision oscillator that is easy to use and occupies very little PC board space. The oscillator frequency is programmed by a single external resistor (RSET). The LTC1799 has been designed for high accuracy operation (≤1.5% frequency error) without the need for external trim components. ...

Circuit 

 

Thermistor Liquid Flowmeter

Aug 17th 1995
The LT1014 is the first precision quad operational amplifier which directly upgrades designs in the industry standard 14-pin DIP LM324/LM348/OP-11/4156 pin configuration. It is no longer necessary to compromise specifications, while saving board space and cost, as compared to single operational amplifiers. ...

Circuit 

 

50MHz Thermistor RMS to DC Converter using a dual switched capacitor instrumentation building block

Aug 17th 1995
The LTC6943 is a monolithic, charge-balanced, dual switched capacitor instrumentation building block. A pair of switches alternately connects an external capacitor to an input voltage and then connects the charged capacitor across an output port. The internal switches have a break-before-make action. An internal clock is provided ...

Circuit 

 

50MHz Thermistor RMS to DC Converter Using 5V Supply

Aug 17th 1995
The LT1014 is the first precision quad operational amplifier which directly upgrades designs in the industry standard 14-pin DIP LM324/LM348/OP-11/4156 pin configuration. It is no longer necessary to compromise specifications, while saving board space and cost, as compared to single operational amplifiers. ...

Circuit 

 

50MHz Thermistor RMS to DC Converter

Nov 16th 1992
The LTC1043 is a monolithic, charge-balanced, dual switched capacitor instrumentation building block. A pair of switches alternately connects an external capacitor to an input voltage and then connects the charged capacitor across an output port. The internal switches have a break-before-make action. An internal clock is provided ...

Circuit 

 

Linear 0°C to 220°C Thermistor Thermometer Powered by 5V Supply

Nov 16th 1992
The LT1006 is the first precision single supply operational amplifier. Its design has been optimized for single supply operation with a full set of specifications at 5V. Specifications at ±15V are also provided. The LT1006 has a low offset voltage of 20μV, drift of 0.2μV/°C, offset current of 120pA, gain of ...

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 

 

Linear Thermometer

Nov 1st 1983
T1 has a built in pair of thermistors with linearizing resistors custom scaled for a specific temperature range., 0C to 100C in this example. The flying capacitor LTC1043 eliminates any dc loading on the precision network to maintain linearity over the entire temperature range. Amplifier gain is scaled to provide an output of ...

Circuit