LT1884ACN8#PBF

LT1884ACN8#PBF application field and working principle

LT1884ACN8#PBF is a high-performance current-feedback instrumentation amplifier (InAmp). It provides excellent, low-noise gain bandwidth and low distortion with overall performance that rivals, if not exceeds the performance of current-feedback, monolithic op amp ICs. This IC is designed for use in advanced measurement and control applications, where signals must be amplified or buffered over wide bandwidths and/or where low distortion and high output drive capability are important.

The LT1884ACN8#PBF is an ideal choice for use in a wide range of applications, including signal conditioning, instrumentation and control, audio, data acquisition and signal processing systems. It is also well suited for applications such as signal-level switching, signal detection and peak locators, rectangular-to-sine signal converters, signal converters, non-inverting buffers and current-feedback voltage converters.

The LT1884ACN8#PBF features a wide single-supply operating voltage range of 4V to 36V and a low input bias current of 5 nA. The device features high common-mode rejection (CMRR) of greater than 77 dB, low noise of 2.5 nV/√Hz, and a high slew rate of 65 V/μs. Additionally, the LT1884ACN8#PBF features a wide operating temperature range of –40 to 85 °C. It is available in an 8-pin MSOP package and is offered in both standard grade and AEC-Q100 Automotive Grade parts.

Working Principle

The LT1884ACN8#PBF is a current-feedback instrumentation amplifier (InAmp). It consists of a variable gain stage differential amplifier, which is followed by a current-feedback output stage. The signal is applied to the non-inverting input, while the inverting input is connected to a gain-setting resistor. The difference between the two inputs is amplified by the variable gain stage and then converted to a current, by a current mirror and a multiplier. The current is then fed back to the inverting input, where it is scaled by the gain-setting resistor and summed with the signal. The output signal is taken from the inverting input.

The gain of the LT1884ACN8#PBF is set by the relationship of the gain-setting resistor to the output impedance of the current mirror. The gain of the LT1884ACN8#PBF is adjustable up to 70 dB. The output stage features high slew rate and low distortion, providing flat frequency response and wide bandwidth. The low distortion and high CMRR of the LT1884ACN8#PBF makes it suitable for many applications where high signal-to-noise ratio, low distortion and wide bandwidth are needed.

Conclusion

The LT1884ACN8#PBF is a high-performance current-feedback instrumentation amplifier (InAmp). It is an ideal choice for use in a wide range of applications, including signal conditioning, instrumentation and control, audio, data acquisition and signal processing systems. The LT1884ACN8#PBF features a wide single-supply operating voltage range of 4V to 36V and a low input bias current of 5 nA. The device features high common-mode rejection (CMRR) of greater than 77 dB, low noise of 2.5 nV/√Hz, and a high slew rate of 65 V/μs. Additionally, the LT1884ACN8#PBF features a wide operating temperature range of –40 to 85 °C. It is suitable for applications where high signal-to-noise ratio, low distortion and wide bandwidth are needed.