MC34071APG

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MC34071APG is a Digitally Controlled Programmable Gain Amplifier (PGA). It works using the same principle as other Instrumentation OP Amps, Buffer Amps or Linear Amplifiers, but uses digitally adjustable transistors and transistors that are comparable to fixed transistors. PGA\'s are primarily used where precise output voltage or current levels, or precise gain settings, are required over a wide range of input signals.

The MC34071APG is a fully integrated pin compatible PGA developed for use in portable, self-powered and industrial applications. It offers two modes of operation: an inherent global gain stage for gain of 0 to 30dB and an 8-dB increment gain stage for gain of 8 to 30 dB. The device operates from a single supply of 5V and consumes only about 10mA of current. The input voltage can vary from 0 to 5V and the output voltage can go from 0 to 5V. The device features very low input bias current and low input voltage noise.

The MC34071APG has excellent frequency response and linearity, making it suitable for wideband applications and precision gain control applications. The device includes a Digital Interface circuit that allows the user to programmatically set the gain via an external control signal. The MC34071APG is available in an 8-pin SOIC package, making it ideal for integration into small and compact designs.

The MC34071APG has an operating temperature range of -40 to +85°C, making it suitable for harsh environments, and is available in a range of package, temperature range and reliability features.

The MC34071APG PGA utilizes a bidirectional control pin, which monitors the output voltage and, if needed, manually adjusts the gain. A sense input is connected to the non-inverting input and allows for the external control voltage to be monitored. This connection allows the PGA to adjust its gain to achieve the highest output voltage, based on both the external control signal and the sensed input voltage.

The MC34071APG has an integrated voltage reference, which allows for an accurate output level. The voltage reference input can be supplied either by an external reference signal such as a fixed voltage divider, or it can be connected directly to the input signal. The voltage reference input sets the gain value when the control voltage is not present.

The MC34071APG is a high-performance instrumentation PGA. It can be used to accurately control the output voltage of analog-to-digital converters, DC servo systems, temperature transducers and instrumentation amplifiers. It can also be used to accurately control the gain of audio systems, power supplies or other precision low-level signal amplification applications.

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