Ultra compact 1.5 A Thermoelectric Cooler (TEC) Controller
The ADN8834 supports negative temperature coefficient (NTC) thermistors as well as positive temperature coefficient (PTC) resistive temperature detectors (RTD). The target temperature is set as an analog voltage input either from a digital-to-analog converter (DAC) or from an external resistor divider.
The temperature control loop of the ADN8834 is stabilized by PID compensation utilizing the built in, zero drift chopper amplifiers. The internal 2.50 V reference voltage provides a 1% accurate output that is used to bias a thermistor temperature sensing bridge as well as a voltage divider network to program the maximum TEC current and voltage limits for both the heating and cooling modes. With the zero drift chopper amplifiers, extremely good long-term temperature stability is maintained via an autonomous analog temperature control loop.
- TEC temperature control
- Optical modules
- Optical fiber amplifiers
- Optical networking systems
- Instruments requiring TEC temperature control
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
The TEC cooling and heating current limits set to 1.5 A and the maximum TEC voltage is programmed to be 3V respectively using two on-board resistor dividers. The temperature set-point circuit is optimized to work with 10 kΩ NTC thermistor. The PID compensation network components are present onboard and can be replaced by soldering different value components to match the temperature control loop characteristic with the thermal load for achieving the required response time and temperature stability. The cooling and heating TEC current limits and maximum TEC voltage setting can be modified also by changing values of the corresponding components.
In addition, the board can be plugged into the ADN8833/34 Base board that has adjustable components for tunable analog thermal PID, the temperature set point, maximum TEC current and TEC voltage limits.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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