LM199/LM399 is a precision shunt reference with excellent temperature stability, suitable for digital multimeters, precision calibration equipment, current sources and other precision low-cost references.
The LM199/LM399 and LM199A/LM399A are precision shunt reference voltage regulators designed for applications requiring high stability over a wide range of voltage, temperature, and operating current conditions. These devices feature a guaranteed temperature coefficient of 0.5ppm/°C and a maximum dynamic impedance of 192 ohms. A stabilizing heater is incorporated with the active Zener to eliminate voltage changes with temperature, ensuring minimal noise and excellent long-term stability.
| Reverse Breakdown Voltage | 6.95V |
|---|---|
| Temperature Coefficient | 0.5ppm/°C |
| Maximum Dynamic Impedance | 192 ohms |
| Operating Current Range | 0.5mA to 10mA |
| Initial Tolerance | 2% |
| Operating Temperature Range | -55°C to 125°C |
| Package Type | 4-Lead TO-46 Metal Can |
The warm-up time to +0.05% Vz is 3 seconds when Vy = 30V.
The RMS noise is guaranteed to be 7 uV when the frequency is between 10Hz and 10kHz.