Microchip Unveils 8-Gain-Step SPI Bus Programmable Gain Amplifier

11/23/2004 - Microchip Technology Inc., a leading provider of microcontroller and analog semiconductors, announced 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 in a user transparent manner while the end application is in use.

The MCP6S9X devices are programmed over the SPI bus, giving users control of the gain and input channel selection and the design flexibility that otherwise could not be achieved easily. The SPI bus is used to select the gain level and the input channel providing analog input expansion for a microcontroller or digital signal processor. This reduces the cost of the microcontroller by lowering the number of input/output pins needed. Moreover, the multiple channels for the same signal path enable system self-calibration of the analog signal path, enhancing accuracy over time and temperature.

“Microchip has created a truly innovative way to interface analog signals to a microcontroller,” said Art Eck, marketing manager for Microchip’s Analog and Interface Product Division. “By controlling an amplifier digitally, the design is no longer fixed and can be modified in operation on the fly, reducing the need for external components.”

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 with an amplifier bandwidth of 1 MHz to 18 MHz. The broad bandwidth is achieved in these amplifiers for a lower supply current, which reduces power supply demands. This device has a supply voltage operation of 2.5 to 5.5V and operates over the –40 degree C to +125 degree C range. Additionally, it offers low noise of 10 nV/rtHz, and low offset voltage 150uV, THD+N 0.0011 percent, 200ns settling time and gain steps of 1, 2, 4, 5, 8, 10, 16 & 32V/V.

The MCP6S91 is available in 8-PDIP, SOIC and MSOP packages, and priced at $0.75 USD each in 1,000-piece units. The MCP6S92 is available in 8-PDIP, SOIC and MSOP packages at a price of $0.89 USD each in 1,000-piece units. The MCP6S93 is available in a 10-MSOP package and is priced at $1.07 USD in 1,000-piece units. Samples and volume quantities are available now. For additional information or pricing on these devices, contact any Microchip sales representative or authorized worldwide distributor or visit www.microchip.com/MCP6S9X.

About Microchip Technology
Microchip Technology Inc. (NASDAQ: MCHP) is a leading provider of microcontroller and analog semiconductors, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide. Headquartered in Chandler, Arizona, Microchip offers outstanding technical support along with dependable delivery and quality. For more information, visit the Microchip website at www.microchip.com.

The Microchip name and logo are registered trademarks of Microchip Technology Inc. in the USA and other countries. SPI is a trademark of Motorola.

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