TEC Chip for Optical Modules

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ADN8831 Thermoelectric Cooler (TEC) Controller is a monolithic TEC controller with two integrated, zero drift, rail-to-rail comparators, and a unique PWM driver. This highly integrated device controls the TEC in a laser module used in optical communications. In optical telecommunication systems, diode lasers are mostly used either as the signal source in the transmitters or as the energy source in the optical amplifiers, their operations affect the performance of the whole system directly. TEC (Thermo Electric Cooler) is the abbreviation of Thermoelectric Cooler (also known as Peltier Cooler). Analog Technologies offers single-stage Peltier modules in five categories — Regular Temperature Rectangular, High Temperature Rectangular, Regular Temperature Circular, Thermal Cycling (Long Life), and Thermal Cycling High Efficiency — covering 20+ series, from 7 to 288 couples.

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The figure on page 1 shows a typical TEC application for optical module control that is commonly used to control laser wavelength (or color) by regulating the temperature of the laser diode.

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