INA826SIDRCR

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The INA826SIDRCR is an integrated, single-ended, continuous-time, rail-to-rail input and output voltage-feedback Instrumentation Amplifier, categorised under Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps. Designed to drive multiple capacitances and various types of loads, the INA826SIDRCR offers exceptional performance characteristics, wide gain range and enhanced common-mode rejection ratio. Despite the cost-effective benefits of this IC, few know its application fields or working principle.

By connecting a few external components, the INA826SIDRCR can be put to use in various places — its typical applications include signal conditioning systems, such as medical instrumentation, industrial process control and signal acquisition systems. In fact, due to its wide gain range, low offset and low noise characteristics, it is advantageous for any type of system that involves signal conditioning.

The INA826SIDRCR features an integrated differential amplifier selectively available in fixed-gain versions ranging from 0.02 to 10 V/V. It possesses a unity-gain bandwidth of 600 kHz and features a full-power bandwidth (FPBW) up to 400 kHz. Its high slew rate capability likewise enables it to drive multiple capacitive loads and various types of loads.

The INA826SIDRCR offers improved common-mode rejection ratios (CMRR) of >100 dB. It is also capable of operating with a supply voltage of up to ±16 V, making it a highly cost-effective solution with wide gain range and enhanced common-mode rejection ratio. The INA826SIDRCR offers a wide gain range with low offset and low noise characteristics, making it highly suitable for signal conditioning applications.

At a linearised schematic level, the solution consists of a combination of an integrated differential amplifier and two signal-path gain-setting resistors. The differential amplifier amplifies the signal between two signal inputs (in-amp ‘+’ & ‘-’) and generates a differential output. The two gain-setting resistors (RF and RI) in the signal path then set up the gain for the gain-setting differential amplifier.

The feedback resistor between the differential amplifier output and one of its inputs (RF) sets up the gain of the differential amplifier. As the resistance in this path changes, the gain of the differential amplifier likewise changes, resulting in a change of overall differential amplifier gain.

The differential amplifier is constructed to enable output stage of the differential amplifier to drive the overall output voltage to equal its input voltage (rail-to-rail output voltage) — an important feature for signal conditioning. All the components connected to the INA826SIDRCR should be designed to support the specified slew rate, otherwise the IC’s full performance cannot be achieved.

In summary, the INA826SIDRCR is a cost-effective, single-ended, continuous-time, rail-to-rail voltage-feedback Instrumentation Amplifier categorised under Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps. It offers exceptional performance characteristics, wide gain range and enhanced common-mode rejection ratio, making it highly suitable for use in signal conditioning systems, such as medical instrumentation, industrial process control and signal acquisition systems.

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