LT1013CD

The LT1013CD is a voltage-controlled instrumentation amplifier used primarily in signal conditioning, level shifting, and sensor interface applications. It can be used in many other linear applications such as current and voltage source conversion, signal isolation, and signal buffering. This amplifier has a low power consumption (only 6mA of quiescent current) and a very low harmonic distortion. Together, these make the LT1013CD ideal for many different types of customers and applications.

Application Field: The LT1013CD can be used in applications that require precise Voltage Controlled Amplification (VCA) such as:

• Level shifting
• Signal conditioning
• Sensor interface
• Current source conversion
• Voltage source conversion
• Signal isolation
• Signal buffering

Working Principle: The LT1013CD is a voltage-controlled amplifier based on differential amplifier topology. A basic differential amplifier composes of two pairs of transistors, each pair has one common terminal being the input and the other input being the differential input D, the output being OA. When the voltage of input D, referred to common input terminal, is increased, the output OA will also increase.

The amplifier can be designed to have a constant OA output regardless of the gain changed by varying the differential input. While, the gain of OA can also be changed with respect to the differential input. To achieve this, a feedback is needed around the differential amplifier and the gain can be adjusted by varying the feedback resistor value. This is the basic working principle of the LT1013CD.

The LT1013CD can provide a range of gain from 0.1 to 1000, with an excellent gain-accuracy of 0.1%, and output impedance of 0.8Ω. It has a wide input range of -0.6V to -6V, much higher than the industry standard of -3V to 10V, and can operate at very low power supply voltage down to 1.8V.

The LT1013CD is a versatile instrumentation amplifier that can simplify system design and reduce power dissipation by providing high performance in a very small package. It is extremely well suited for level shifting, signal conditioning, transducer interfacing and low power applications.