LM158H

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The LM158H is an instrumentation amplifier that can help to effectively solve the issues related to noise, gain error, and ac response. It is designed for high-speed and low-noise applications in the industrial, communication, medical and automotive industries. The device features an output offset voltage of 5 mV, a noise of 0.29 µVpp and a high input impedance of 100 kΩ. Additionally, its rail-to-rail output tracks with the input voltage, meaning that the output voltage follows the input voltage even when the input voltage is greater than the supply voltage.

Features

• Low input bias current: 3 nA
• High common-mode rejection ratio: 75 dB
• High voltage gain accuracy: ±0.2 %
• Low temperature drift: 0.2 mV/°C
• Low supply current: 18 mA/amplifier
• Rail-to-Rail output for both single-ended and differential configurations

Applications

• Medical instruments
• Industrial monitoring
• Communication circuits
• Test and measurement equipment
• Automotive and portable electronics

Working Principle of LM158H

The LM158H is a two-channel, low-noise, high-speed instrumentation amplifier that utilizes a pair of JFETs and a single external resistor to set the gain. The amplifier has an input impedance of 100 kΩ and a closed loop gain of up to 100. Additionally, the device is stable with capacitive loads up to 20 pF, making it ideal for use in high-impedance inputs. The amplifier utilizes a low-noise technique to extend its frequency response and provide excellent ac performance.

The LM158H is a differential input instrumentation amplifier, meaning that the amplifier is driven by two separate input signals that are referenced to a common ground. The amplifier takes these two separate input signals and combines them in order to produce an amplified output. This output is then filtered to remove any noise or unwanted signals. The gain of the amplifier is determined by the value of the single external resistor that is connected to the amplifier.

The LM158H features a rail-to-rail output for both single-ended and differential configurations. This feature allows the amplifier to track the input voltage even when the input voltage is greater than the supply voltage. This is especially useful in cases where the input voltage is greater than the voltage of the amplifier’s power supply.

The LM158H is an excellent choice for applications that require precision and low noise gain amplification. Its wide frequency response, low noise, and rail-to-rail output make it suitable for use in high-end medical, industrial, and automotive applications. Additionally, its low temperature drift ensures that the amplifier maintains its accuracy over a wide temperature range.

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