ADN8831ACPZ-REEL7

ADN8831 is a monolithic thermoelectric cooler controller. It has two intergrade, zero drift, rail-to-rail comparators, and a PWM driver. A unique PWM driver works with an analogue driver to control external selected MOSFETs in an H-bridge. By sensing the thermal detector feedback from the TEC, it can drive a TEC to settle the programmable temperature of a laser diode or a passive component attached to the TEC module. This supports NTC thermistors or positive temperature coefficient RTDs. The target temperature is set as an analogue voltage input either from a DAC or from an external resistor divider driven by a reference voltage source. A proportional integral differential compensation network helps to quickly and accurately stabilize the thermal control loop. Application includes thermoelectric cooler temperature control, DWDM optical transceiver modules, optical fibre amplifiers, optical networking systems, and instruments requiring TEC temperature control.

• TEC voltage and current operation monitoring, configurable PWM switching frequency up to 1MHz
• Programmable TEC maximum voltage and current/current heating and cooling limits
• Power efficiency is <gt/>90%, temperature lock indication
• Clock phase adjustment for multiple drop operation, adjustable soft start feature
• Power supply voltage range from 3.0 to 5.5V (VDD=3.0 V to 5.0V, TA=25°C)
• Standby current is 2mA (SYNCI/SD active high=VDD, SS/SB active high=0V)
• Typical oscillator frequency is 1000KHz (COMPOSC=VDD, RFREQ=118Kohm, SYNCI/SD=VDD, VDD=5.0V)
• Nominal free-run oscillation frequency range from 200 to 1000KHz (COMPOSC=VDD, SYNCI/SD=VDD)
• Temperature rating range from -40°C to +85°C
• 32-lead frame chip scale package [LFCSP]

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