ICL7641BCPD+

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Instrumentation amplifiers are widely used to amplify signals with very small voltage swings, such as thermocouples, strain gauges, and pressure transducers. They are designed to provide a high common-mode rejection ratio and good noise rejection, and the ICL7641BCPD+ is no exception. It is a single-chip solution for instrumentation and general-purpose applications.

The ICL7641BCPD+ is an integrated charge-balancing instrumentation amplifier with three operational amplifiers, two sample and hold circuits, reference voltage source, and output buffers all in a 10-pin micro-sized package. The device operates from a single +5V supply, and provides a gain adjustable from 2 to 10,000 with 1 dB steps. The input bias current is typically 2 pA and the input offset voltage is less than 4 mV. The output voltage range is 1V to 4V and can be adjusted with an external resistor.

The gain can be programmed by changing the resistor values at the gain programming inputs. It consists of two core amplifier circuits, A1 and A2. A1 is a unity gain differentially clamped amplifier and A2 is a differential instrumentation amplifier that has both Gain and CMRR (Common Mode Rejection Ratio) programming inputs. The differential A1 output is routed to the sample and hold circuit, and the differential A2 output is routed to the buffer amplifier which provides the desired output.

The ICL7641BCPD+ features an extended bandwidth, excellent dynamic performance, and low distortion. It is also very low power and fast to settle. Its features make it suitable for use in ultrasonic imaging, voltage measurement and other industrial applications.

In summary, The ICL7641BCPD+ is an integrated charge-balancing instrumentation amplifier with three operational amplifiers, two sample and hold circuits, reference voltage source, and output buffers all in a 10-pin micro-sized package. It provides a gain adjustable from 2 to 10,000 with 1 dB steps, and its features make it suitable for use in ultrasonic imaging, voltage measurement and other industrial applications. It provides high common-mode rejection ratio and good noise rejection, and is low power and fast to settle.

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