LM6132AIM Datasheet/PDFLM6132AIM Application Field and Working Principle
The LM6132AIM is a precision instrumentation amplifier from Texas Instruments. It is designed for a wide variety of signal conditioning applications, offering a gain accuracy of 0.02% and an offset voltage of 7µV/V maximum. It belongs to the Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps category.
The LM6132AIM is designed with full performance requirements for signal conditioning. It has good common-mode rejection, low distortion and high gain stability. It is well suited for precise measurements of bridge-type transducers and signal sources, as well as medical instrumentation and data acquisition. It also offers excellent protection against erratic signals and electrostatic discharges. It is protected from permanent damages by use of a Thermal Limiting circuit.
Working Principle
The LM6132AIM works on the principle of a three-stage instrumentation amplifier, with common-mode voltage rejection and adjustable overall gain. A non-inverting amplifier stage amplifies the input signal with a given gain. This signal is then sent to an inverting amplifier stage which decreases its gain. Finally, the output signal is sent to a third stage, the summing amplifier. The summing amplifier combines the magnitude of the two differential signals and amplifies it with a gain adjustable via the gain control pin, thus ensuring a linear relation between the input and output signals.
The LM6132AIM has excellent temperature performance, as it is temperature compensated and offers a temperature coefficient of total offset voltage of 5ppm/°C. It also features a high common-mode rejection ratio from -37 dB up to 65 dB, depending on the gain selection, and a low noise figure of 0.02 μVrms. In addition, it has an output voltage swing of ±2.2V and a low power consumption of only 18 mW.
The LM6132AIM offers a wide range of features and performance. It is suitable for a variety of signal conditioning applications, from medical instrumentation to data acquisition systems and from bridge type transducers to remote sensing instruments. It is perfect for applications that require high-precision measurements but are limited by size constraints or cost constraints.