The LT1009 reference circuit is a precision-trimmed 2.5-V shunt regulator featuring low dynamic impedance and a wide operating current range. The reference tolerance is achieved by on-chip trimming, which minimizes the initial voltage tolerance and the temperature coefficient, αVZ.
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 LT1009 is characterized for operation from –55°C to 125°C.
(1) Custom temperature ranges available
| VO (V) | 2.5 |
| Initial accuracy (max) (%) | 0.2 |
| VO adj (min) (V) | 2.5 |
| VO adj (max) (V) | 2.5 |
| Iz for regulation (min) (µA) | 400 |
| Reference voltage (V) | Fixed |
| Rating | Military |
| Temp coeff (max) (ppm/°C) | 35 |
| Operating temperature range (°C) | -55 to 125 |
| Iout/Iz (max) (mA) | 10 |
| DIESALE (KGD) | — | See data sheet |
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