ADN8831

Data Sheet Thermoelectric Cooler (TEC) Controller ADN8831 FEATURES GENERAL DESCRIPTION Two integrated zero drift, rail-to-rail, chop amplifiers TEC voltage and current operation monitoring Programmable TEC maximum voltage and current Programmable TEC current heating and cooling limits Configurable PWM switching frequency up to 1 MHz Power efficiency: > 90% Temperature lock indication Optional internal or external clock source Clock phase adjustment for multiple drop operation Supports negative temperature coefficient (NTC) thermistors or positive temperature coefficient (PTC) resistance thermal detectors (RTDs) 5 V typical and optional 3 V supplies Standby and shutdown mode availability Adjustable soft start feature 5 mm × 5 mm 32-lead LFCSP APPLICATIONS Thermoelectric cooler (TEC) temperature control DWDM optical transceiver modules Optical fiber amplifiers Optical networking systems Instruments requiring TEC temperature control The ADN8831 is a monolithic TEC controller. It has two integrated, zero drift, rail-to-rail comparators, and a PWM driver. A unique PWM driver works with an analog driver to control external selected MOSFETs in an H-bridge. By sensing the thermal detector feedback from the TEC, the ADN8831 can drive a TEC to settle the programmable temperature of a laser diode or a passive component attached to the TEC module. The ADN8831 supports NTC thermistors or positive temperature coefficient (PTC) RTDs. The target temperature is set as an analog voltage i...