| VO (V) | 2.5 |
| Reference voltage | Fixed |
| Initial accuracy (Max) (%) | 0.2 |
| VO adj (Min) (V) | 2.5 |
| VO adj (Max) (V) | 2.5 |
| Iz for regulation (Min) (uA) | 400 |
| Rating | Catalog |
| Temp coeff (Max) (ppm/ degree C) | 25 |
| Operating temperature range (C) | -40 to 85, 0 to 70 |
| Iout/Iz (Max) (mA) | 10 |
- Excellent Temperature Stability
- Initial Tolerance: 0.2% Max
- Dynamic Impedance: 0.6
Max - Wide Operating Current Range
- Directly Interchangeable With LM136
- Needs No Adjustment for Minimum Temperature Coefficient
The LT1009 reference circuit is a precision-trimmed 2.5-V shunt regulator featuring low dynamic impedance and a wide operating current range. The maximum initial tolerance is ±5 mV in the LP package and ±10 mV in the D and PW packages. The reference tolerance is achieved by on-chip trimming, which minimizes the initial voltage tolerance and the temperature coefficient, 
VZ.
Although the LT1009 needs no adjustments, a third terminal (ADJ) allows the reference voltage to be adjusted ±5% to eliminate system errors. In many applications, the LT1009 can be used as a terminal-for-terminal replacement for the LM136-2.5, which eliminates the external trim network.
The LT1009 uses include 5-V system references, 8-bit analog-to-digital converter (ADC) and digital-to-analog converter (DAC) references, and power-supply monitors. The device also can be used in applications such as digital voltmeters and current-loop measurement and control systems.
The LT1009C is characterized for operation from 0°C to 70°C. The LT1009I is characterized for operation from ?40°C to 85°C.
