1FEATURES

• Excellent Temperature Stability

• Initial Tolerance: 0.2% Typical

• Dynamic Impedance: 0.6 Ω Typical

• Wide Operating Current Range

• Directly Interchangeable With LM136

• Needs No Adjustment for Minimum

Temperature Coefficient

• Available in Military (–55°C/125°C)

Temperature Range (1)

DESCRIPTION/ORDERING INFORMATION

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.