INA131BPG4

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The INA131BPG4 is an instrumentation amplifier that provides precision signal conditioning in a variety of applications. It is commonly used in instrumentation amplifiers, as well as in buffer amplifiers and is great for a variety of signal conditioning applications including medical instrumentation, industrial test equipment and strain-gauge based transducers.

The INA131BPG4 is a low-power instrumentation amplifier available in the SOIC-8 package and includes input-offset trim pins that allow for accurate dynamic offset correction. The device has low noise and low drift, and its high CMRR and gain bandwidth allow for accurate signal conditioning and a high signal-to-noise ratio.

The INA131BPG4 is a single-supply amplifier with a maximum output voltage swing of 3V. It works on a single-supply supply voltage range of 4.5V to 5.5V and offers excellent common-mode rejection (CMRR) up to -112 dB at 10 kHz, and a typical bandwidth of 7 kHz. The INA131BPG4 also provides outstanding dynamic performance and excellent temperature stability, making it ideal for applications in medical and industrial instrumentation.

The INA131BPG4 is a voltage-feedback instrumentation amplifier. It has a classic, two-stage instrumentation amplifier topology. The first stage is a low noise, unity-gain, single-ended buffer amplifier. This is followed by a differential, voltage-feedback amplifier in the second stage. The device has a differential input range of 1V and a single-ended output range of 2.5V peak-to-peak.

The INA131BPG4 provides excellent input impedance flexibility. It has an input impedance of 240 kΩ, selectable with an on-chip resistor. The device also features a selectable gain of 1x and 10x with 4 types of gain settings. The 4 types of gain settings are selected by pin option codes, which allow the user to change the gain from the programmed setting to the ideal gain for any given application.

The open-loop gain of the INA131BPG4 is 1V/V and the bandwidth is 7 kHz. The device is a low-noise amplifier, with a noise voltage of 3.4 nV/√Hz and a low input-bias current of 10pA. The gain accuracy of the amplifier is 0.45%, and its slew rate is 0.25V/µs

The INA131BPG4 is ideal for medical and industrial applications due to its high CMRR, high gain, low noise, low input bias current, and excellent temperature stability. The on-chip resistor provides a wide range of input impedance flexibility and the pin-option codes allow for easy gain selection. It is an ideal choice for instrumentation amplifiers, buffer amplifiers, transducers, and medical applications.

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