Overview
The ADN8834ACPZ-R7, produced by Analog Devices Inc., is an ultracompact, 1.5 A Thermoelectric Cooler (TEC) controller. This device is designed to provide precise temperature control for applications such as laser diodes and other temperature-sensitive components. The ADN8834 features a high-efficiency single inductor architecture and integrated low RDSON MOSFETs, making it a robust solution for thermal management. The controller supports both negative temperature coefficient (NTC) thermistors and positive temperature coefficient (PTC) resistive temperature detectors (RTD), ensuring versatility in various temperature sensing scenarios.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| N-MOSFET On-Resistance (WLCSP, VPVIN = 5.0 V) | RDS_NS(ON) | 40 | 60 | 80 | mΩ | |
| N-MOSFET On-Resistance (LFCSP, VPVIN = 5.0 V) | RDS_NS(ON) | 60 | 80 | 95 | mΩ | |
| N-MOSFET On-Resistance (WLCSP, VPVIN = 3.3 V) | RDS_NS(ON) | 45 | 65 | 75 | mΩ | |
| N-MOSFET On-Resistance (LFCSP, VPVIN = 3.3 V) | RDS_NS(ON) | 55 | 75 | 85 | mΩ | |
| PWM Oscillator Frequency | fOSC | EN/SY high | 1.85 | 2.0 | 2.15 | MHz |
| PWM Duty Cycle | DSW | 6 | 93 | % | ||
| EN/SY Input Voltage Low | VEN/SY_ILOW | 0.8 | V | |||
| EN/SY Input Voltage High | VEN/SY_IHIGH | 2.1 | V |
Key Features
- High Efficiency Single Inductor Architecture: Optimizes power efficiency and reduces component count.
- Integrated Low RDSON MOSFETs: Enhances the overall performance and reliability of the TEC controller.
- TEC Voltage and Current Operation Monitoring: No external sense resistor is required, simplifying the design.
- Independent TEC Heating and Cooling Current Limit Settings: Allows for precise control over both heating and cooling operations.
- Programmable Maximum TEC Voltage: Provides flexibility in setting the maximum voltage for the TEC.
- 2.0 MHz PWM Driver Switching Frequency: Supports high-frequency operation for efficient thermal management.
- External Synchronization: Enables synchronization with external clocks for coordinated system operation.
- Two Integrated, Zero Drift, Rail-to-Rail Chopper Amplifiers: Ensures long-term temperature stability through PID compensation.
Applications
- Laser Diodes: Precise temperature control is crucial for maintaining the performance and lifespan of laser diodes.
- Optical Communication Systems: Temperature stability is essential for maintaining signal integrity in optical communication systems.
- Medical Devices: Used in medical equipment where precise temperature control is necessary for diagnostic and therapeutic purposes.
- Aerospace and Defense: Applied in various military and aerospace applications requiring stable temperature environments.
- Industrial Automation: Used in industrial settings where temperature control is critical for the operation of sensitive components.
Q & A
- What is the primary function of the ADN8834?
The ADN8834 is a Thermoelectric Cooler (TEC) controller designed to provide precise temperature control for various applications.
- What types of temperature sensors does the ADN8834 support?
The ADN8834 supports both negative temperature coefficient (NTC) thermistors and positive temperature coefficient (PTC) resistive temperature detectors (RTD).
- What is the maximum TEC current that the ADN8834 can handle?
The ADN8834 can handle up to 1.5 A of TEC current.
- Does the ADN8834 require an external sense resistor for TEC voltage and current monitoring?
No, the ADN8834 does not require an external sense resistor for TEC voltage and current monitoring.
- What is the switching frequency of the PWM driver in the ADN8834?
The PWM driver in the ADN8834 operates at a switching frequency of 2.0 MHz.
- Can the ADN8834 be synchronized with an external clock?
Yes, the ADN8834 supports external synchronization.
- What type of amplifiers are integrated into the ADN8834 for temperature stability?
The ADN8834 features two integrated, zero drift, rail-to-rail chopper amplifiers for long-term temperature stability.
- How is the target temperature set in the ADN8834?
The target temperature is set as an analog voltage input either from a digital-to-analog converter (DAC) or from an external resistor divider.
- What is the purpose of the PID compensation in the ADN8834?
The PID compensation, utilizing the built-in zero drift chopper amplifiers, stabilizes the temperature control loop and maintains long-term temperature stability.
- What are some common applications of the ADN8834?
The ADN8834 is commonly used in laser diodes, optical communication systems, medical devices, aerospace and defense, and industrial automation.
