Microchip’s integrated thermocouple EMF-to-temp IC, in distribution

December 02, 2015 // By Graham Prophet
Mouser Electronics has the MCP9600 thermocouple EMF to temperature converter from Microchip Technology, a thermocouple-conditioning integrated circuit that combines precision instrumentation, a precision temperature sensor and a precision, high-resolution analogue-to-digital converter (ADC), in addition to a math engine preprogrammed with the firmware to support a broad range of standard thermocouple types.

The MCP9600 simplifies thermocouple designs by integrating these discrete devices into one chip, reducing board area, cost, and power consumption. It converts thermocouple electromotive force (EMF) to degrees Celsius with integrated cold-junction compensation to avoid incorrect measurements. It corrects the thermocouple nonlinear error characteristics of eight thermocouple types (K, J, T, N, S, E, B, R) and outputs temperature data accurate to ±1.5C for the selected thermocouple. The MCP9600 provides designers with the first plug-and-play solution for creating thermocouple-based designs, because it eliminates the design expertise required for a discrete implementation, such as firmware development using a microcontroller’s math engine.

The MCP9600 includes user-programmable registers, which provide design flexibility for various temperature-sensing applications, including low-power modes for battery-powered applications, adjustable digital filter for fast transient temperatures, and four individually programmable temperature alert outputs that can be used to detect multiple temperature zones. The temperature alert limits have multiple programmable configurations such as alert polarity as either an active-low or active-high push-pull output, and output function as comparator mode (useful for thermostat-type operation) or interrupt mode for microprocessor-based systems. In addition, the alerts can detect either a rising or a falling temperature with up to 255C hysteresis. This sensor uses an industry-standard 2-wire, I ²C-compatible serial interface and supports up to eight devices per bus by setting the device address.

Mouser; www.mouser.com/new/microchip/microchip-mcp9600-converter/