The ADN8833 is a monolithic H-bridge TEC driver with integrat-ed 1 A power MOSFETs. It has a linear power stage with the linear driver (LDR) output and a pulse-width modulation (PWM) power stage with the SW output. Depending on the control voltage at the CONT input, the ADN8833 drives current through a TEC to settle the temperature of a laser diode or a passive component attached to the TEC module to the programmed target temperature.
The control voltage applied to the CONT input is generated by a digital-to-analog converter (DAC) closing the digital proportional, integral, derivative (PID) loop of temperature control system.
The internal 2.5 V reference voltage provides a 1% accurate output that is used to bias a voltage divider network to program the maximum TEC current and voltage limits for both the heating and cooling modes. It can also be a reference voltage for the DAC and the temperature sensing circuit, including a thermistor bridge and an analog-to-digital converter (ADC).
**Applications**
TEC temperature control
Optical modules
Optical fiber amplifiers
Optical networking systems
Instruments requiring TEC temperature control
### Features and Benefits
Patented high efficiency single inductor architecture
Integrated low RDSON MOSFETs for TEC driver
TEC voltage and current operation monitoring
No external sense resistor required
Independent TEC heating and cooling current limit settings
Programmable maximum TEC voltage
2 MHz PWM switching frequency
External synchronization
Digital thermal control loop compatible
2.50 V reference output with 1% accuracy
Available in a 25-ball, 2.5 mm x 2.5 mm WLCSP or in a 24-lead, 4 mm x 4 mm LFCSP
