Analog Devices Inc. ADN8834超紧凑TEC控制器
Analog Devices ADN8834超紧凑1.5A热电冷却 (TEC) 控制器包括一个线性功率级、一个脉冲宽度调制（PWM）功率级和两个零漂移、轨到轨运算放大器。该器件利用两对采用H桥配置的互补集成式MOSFET来控制和提供双向TEC电流。通过测量热传感器反馈电压和将集成运算放大器用作比例积分微分 (PID) 补偿器来实现信号调节。ADN8834 通过 PID 补偿来稳定温度控制回路。内部2.50V基准电压提供精确的1%输出，用于热敏电阻温度检测电桥和分压器网络偏置，从而在加热和冷却模式下对最大TEC电流和电压限值进行编程。零漂移斩波放大器有助于ADN8834通过自主模拟温度控制回路来保持长期温度稳定性。
The ADN8834 stabilizes the temperature control loop through PID compensation. The internal 2.50V 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. The zero drift chopper amplifiers help the ADN8834 maintain long-term temperature stability via an autonomous analog temperature control loop.
特性
- Patented high-efficiency single inductor architecture
- Integrated low RDSON MOSFETs for the TEC controller
- TEC voltage and current operation monitoring
- No external sense resistor required
- Independent TEC heating and cooling current limit settings
- Programmable maximum TEC voltage
- 2.0MHz PWM driver switching frequency
- External synchronization
- Two integrated, zero drift, rail-to-rail chopper amplifiers
- Capable of NTC or RTD thermal sensors
- 2.5V reference output with 1% accuracy
- Temperature lock indicator
- Available in a 25-ball, 2.5mm × 2.5mm WLCSP or in a 24-lead, 4mm × 4mm LFCSP
应用
- TEC temperature control
- Optical modules
- Optical fiber amplifiers
- Optical networking systems
- Instruments requiring TEC temperature control
Block Diagram
发布日期: 2016-01-29
| 更新日期: 2022-03-11