INA115BU Instrumentation Amplifier：Datasheet, Application, Circuit

Symbol

INA115BU Symbol

Footprint

INA115BU Footprint

3D Model

INA115BU 3D Model

The INA115BU is a low cost, general-purpose instrumentation amplifier offering excellent accuracy. Its versatile three-op amp design and small size make it ideal for a wide range of applications. Similar to the model INA114, the INA115BU provides additional connections to the input op-amps, A1 and A2, which improve gain accuracy in high gains and are useful in forming switched-gain amplifiers.

Texas Instruments INA115BUG4 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments INA115BUG4.

• Low offset voltage: 50µV max

• Low drift: 0.25µV/°C max

• Low input bias current: 2nA max

• High common-mode rejection: ±40V

• Wide supply range: ±2.25 TO ±18V

• Low quiescent current: 3mA max

• Sol-16 surface-mount package

• Switched-gain amplifier

• Bridge amplifier

• Thermocouple amplifier

• RTD sensor amplifier

• Medical instrumentation

• Data acquisition

A circuit shows the basic connections required for the operation of the INA115BU. Applications with noisy or high impedance power supplies may require decoupling capacitors close to the device pins as shown.

INA115BU  Application Circuit

A circuit for the digital selection of four gains is below. Multiplexer “on” resistance does not significantly affect the gain. The resistor values required for some commonly used gain steps are shown. This circuit uses the internal 25kΩ feedback resistors, so the resistor values shown cannot be scaled to a different impedance level.

Typical Application Circuit- Switched-Gain Instrumentation Amplifier (minimum components)

A circuit shows an alternative switchable gain configuration. This circuit does not use the internal 25kΩ feedback resistors, so the nominal values shown can be scaled to other impedance levels. This circuit is ideal for use with a precision resistor network to achieve excellent gain accuracy and the lowest gain drift.

Typical Application Circuit- Switched-Gain Instrumentation Amplifier (improved gain drift)

Texas Instruments (TI) is a global semiconductor firm originating in 1958 and nowadays it has over 30,000 employees who design, conduct and sell analogue and product-differentiating embedded processing components in 35 countries. Aimed at changing the world of tech, TI has put great effort into becoming the solution provider coupled with a vision.