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5V Powered, Linearized Platinum RTD 0°C to 400°C ±0.05°C Signal Conditioner - 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. __ Linear Technology/Analog Devices App Note, Mar 29th 2010
5V Powered, Quartz-Stabilized 10kHz Voltage to Frequency Converter has 0.0015% Linearity & 8ppm/°C Temperature Coefficient - Almost all precision voltage-to-frequency converters utilize charge pump based feedback for stability. These schemes rely on a capacitor for stability. A great deal of effort towards this approach has resulted in high performance V to F converters. Obtaining temperature coefficients below 100ppm/°C requires careful attention __ Linear Technology/Analog Devices App Note, Mar 25th 2010
775 Nanovolt Noise Measurement for A Low Noise Voltage Reference - Linear Technology AN124 __ Designed by Jim WilliamsJul 3rd, 2009
Accelerometer Amplifier with DC Servo - The feedback integrator amplifies the 100 Megohm feedback resistance to behave like about 1Gigohm, extending the low-frequency response downward by about an order of magnitude. __ Linear Technology/Analog Devices App Note, Jun 21st 2011
Accelerometer Signal Conditioner - A piezoelectric accelerometer responds to any physical movement by generating a charge proportional to the acceleration of the movement. This sensor has a capacitance of 750pF which produces a charge of 60pC per g of gravitational force. This charge is transferred to the 1000pF feedback capacitor for an output of 60mV/g. __ Linear Technology/Analog Devices App Note, Mar 16th 2010
AN124775 Nanovolt Noise Measurement for A Low Noise Voltage Reference - Linear Technology AN124 __ Designed by Jim WilliamsJul 3rd, 2009
Battery Powered (Li-Ion) Platinum RTD Signal Conditioner with Curvature Correction - The LT2078 is a micropower dual op amp in 8-pin small outline, standard surface mount package, and LT2079 is a micropower quad op amp offered in the standard 14-pin surface mount package. Both devices are optimized for single supply operation at 5V. ±15V specifications are also provided. __ Linear Technology/Analog Devices App Note, Mar 30th 2010
Dead Zone Generator - BIPOLAR SYMMETRY IS EXCELLENT BECAUSE ONE DEVICE, Q2, SETS BOTH LIMITS. This circuit outputs 0V for a controlled range of input voltage. When the input voltage exceeds the set voltage in either polarity the output signal moves with unity gain. __ Linear Technology/Analog Devices App Note, Jun 21st 2011
Differential Bridge Amplifier with Gain Programmed through the Serial Interface & Analog to Digital Conversion (Standby Current Less than 100μA) - The LTC6915 is a precision programmable gain instrumentation amplifier. The gain can be programmed to 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096 through a parallel or serial interface. The CMRR is typically 125dB with a single 5V supply with any programmed gain. The offset is below 10μV with a temperature __ Linear Technology/Analog Devices App Note, Apr 29th 2010
Fast, 16-Bit Current Comparator - Precision op-amp used as pre-comparator. Schottky diodes in feedback limit output swing of amplifier to minimize slew delay. Resistive input structure can be tailored for different trip points; this one detects a current sink of >50uA at the input __ Linear Technology/Analog Devices App Note, Jun 21, 2011
Gain 1000 Amplifier with 0.01% Accuracy, DC to 5Hz - With a typical open loop gain value of 20 million V/V, very high closed loop gain amplifiers can be implemented with remarkable accuracy. Even with such a high gain, the trimmed precision produces a dc output offset of only 20mV. __ Linear Technology/Analog Devices App Note, Jun 21st 2011
Kelvin-Sensed Temperature Sensor Amplifier for –50°C to 150°C Platinum RTD from 10V Reference - The LT1012 is an internally compensated universal precision operational amplifier which can be used in practically all precision applications. The LT1012 combines picoampere bias currents (which are maintained over the full –55°C to 125°C temperature range) , microvolt offset voltage (and low drift with time and temperature) , __ Linear Technology/Analog Devices App Note, Mar 29th 2010
Linear Thermometer - 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 __ Linear Technology/Analog Devices App Note, Jun 21st 2011
Linearized Platinum Resistance Thermometer with ±0.025°C Accuracy Over 0 to 100°C - Platinum RTD's are typically driven with a constant current so that their resistance value directly translates to a temperature dependant voltage. Here the LT1001 and the LM129 create a constant current through the input 10K resistor which all flows through the sense resistor. A second amplifier inverts the signal to provide __ Linear Technology/Analog Devices App Note, Jun 21st 2011
Low Power Comparator with <10uV Hysteresis - 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. __ Linear Technology/Analog Devices App Note, Jun 21st 2011
Low Side Current Sense - Sensing the amount of current through a load on the low side has the disadvantage of raising the return connection to the load from ground. The advantage of such an approach is that it is very easy to implement using a basic non-inverting gain stage. The LTC6081 operates linearly down to ground also in this single supply example. __ Linear Technology/Analog Devices App Note, Mar 16th 2010
Micropower Thermocouple Signal Conditioner with Cold Junction Compensation - A thermistor, shown as R3, is used to monitor the cold junction temperature. Its resistance becomes smaller as the cold junction temperature increases. An increase in cold junction temperature will reduce the output voltage of the Type J thermocouple by 52uV/C. The voltage reference and scaling of resistor values creates an __ Linear Technology/Analog Devices App Note, Jun 21st 2011
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