产品概览
The LM4120AIM5X-3.3/NOPB from TI is a 3.3V precision series voltage reference with ±0.2% initial accuracy and 10 ppm/°C temperature drift. It sources and sinks up to 5 mA, making it suitable as a precision reference for ADCs, DACs, and sensor excitation.
主要规格
| 功能 | 3.3V precision series voltage reference |
| Output Voltage | 3.3V fixed |
| Initial Accuracy | ±0.2% |
| Temperature Drift | 10 ppm/°C max |
| 输出电流 | ±5 mA |
| 电源电压 | 3.5V to 12V |
| 包装 | SOT-23-5 (2.9×1.6mm) |
工作原理
A buried-zener reference core provides inherently low noise and excellent long-term stability. A chopper-stabilized amplifier buffers the reference and drives the 3.3V output. The series architecture allows the output to be loaded up to ±5 mA without degradation. ENABLE pin provides power-down capability reducing IQ to <1 µA.
应用
- ADC/DAC reference
- Sensor excitation
- Precision bias
- Current source reference