MAX419CSD+

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The MAX419CSD+ is a dual, rail-to-rail instrumentation amplifier available in four versions, with or without enable pins or an input offset adjust. All four versions have a gain bandpass of 1 V/V to 10 V/V and a single, external gain-setting resistor with an accuracy ±5%. Its gain accuracy is maintained to 3%.

The MAX419CSD+ is ideal for many low-level signal conditioning applications including data acquisition, process control, and industrial automation. It was designed to operate in single-supply applications, with supply voltage ranging from 2.5V to 16.5V. Its rail-to-rail input and output stages also make it suitable for dual supply systems with a range of ±1.25V to ±8.25V.

In order to achieve such wide capabilities and dynamic range, the MAX419CSD+ utilizes a differential input and an output amplifier built from a single high-speed, rail-to-rail CMOS current-feedback amplifier. The design is optimized for high-performance, high-bandwidth and low-noise operation. It features superior distortion performance and excellent common-mode rejection ratio (CMRR) of 110dB at low gains.

The MAX419CSD+ provides excellent linearity and dynamic range. Its gain flatness is 0.8dB and its bandwidth is less than 200kHz. It is available in a number of packages, including the small SOIC-8, the thermally-enhanced TSSOP-8 and the 8-pin PDIP with a 2mm lead pitch. The MAX419CSD+ also includes an on-chip temperature sensor that is used to maintain high accuracy by compensating for the effects of temperature variation and aging.

Bio-signal applications can take advantage of the MAX419CSD+\'s wide input voltage range, low drift and high CMRR, which make it suitable for use as an instrumentation amplifier for low-level bio-signal measurement. Additionally, a wide output voltage range and fast slew rate enable the MAX419CSD+ to accurately drive loads with a wide range of capacitances for electro-mechanical control applications.

For current sensing applications, the MAX419CSD+ can be configured with the addition of an external gain resistor. The output of the amplifier is proportional to the current flowing through the shunt resistor and can be used to accurately monitor and control current in high-side current sensing applications, such as motor control.

In summary, the MAX419CSD+ is a robust, dual instrumentation amplifier with excellent input, output and gain accuracy, low drift, wide input and output voltage ranges, high CMRR and low distortion. It is suitable for low-level signal conditioning, low-level bio-signal measurement and current sensing applications.

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