Programmable gain amplifier provides control

Microchip has introduced a programmable gain amplifier family that provides digital control over the amplifier function and design.

Microchip has introduced a programmable gain amplifier family that provides digital control over the amplifier function and design.

The ability to configure the system gain and signal path during operation allows maximum flexibility for system self-calibration and other system operation adjustments.

The MCP6S9X devices are programmed over the SPI bus, giving control of gain and input channel.

This can provide analog input expansion for a microcontroller or digital signal processor.

This reduces the cost of the microcontroller by requiring a lower number of input/output pins.

In addition, having multiple channels for the same signal path enables system self-calibration, enhancing accuracy over time and temperature.

Target applications for this product include industrial and instrumentation markets as well as signal and sensor processing.

Available in 1- and 2-channel inputs, this product has eight-gain steps (1, 2, 4, 5, 8, 10, 16 and 32V/V) with an amplifier bandwidth of 1 to 18MHz.

The broad bandwidth is achieved in these amplifiers at a lower supply current, reducing power supply demands.

They offer low noise of 10nV/(rt)Hz, low offset voltage of 150uV, low distortion (THD+N) of 0.0011% and 200ns settling time.

The devices operate from a supply voltage of 2.5 to 5.5V and over a -40 to +125C range.

The MCP6S91 and MCP6S92 are available in 8-PDIP, SOIC and MSOP packages and the MCP6S93 is available in a 10-MSOP package.

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