Microchip Technology Inc. has added a family of 900 kHz, selectable-gain amplifiers to its product line of programmable amplifiers. The MCP6G01, MCP6G02, MCP6G03 and MCP6G04 (MCP6G0x) feature a gain-select pin in place of a negative-input-pin, enabling digital gain control for better system accuracy and dynamic range. The amplifiers can be used as drop-in replacements for op amps, as microcontroller-controlled amplifiers or as stand-alone gain blocks and eliminate the need for external resistors. The MCP6G0x amplifiers feature a low-voltage operation range of 1.8 to 5.5 V, low quiescent current of 110 microamperes and a high bandwidth of 350 kHz for 10 V/V, 250 kHz for 50 V/V and 900 kHz at 1 V/V. The devices enable designers to select gains of 1, 10 or 50 V/V simply by driving the gain-input pin to the high, low or high “Z” state with the microcontroller.