LT1009M
www.ti.com SLVS925A – APRIL 2009 – REVISED JULY 2013 2.5-V INTEGRATED REFERENCE CIRCUIT
Check for Samples: LT1009M FEATURES 1 Excellent Temperature Stability
Initial Tolerance: 0.2% Typical
Dynamic Impedance: 0.6 Ω Typical
Wide Operating Current Range
Directly Interchangeable With LM136 (1) Needs No Adjustment for Minimum
Temperature Coefficient
Available in Military (–55°C/125°C)
Temperature Range (1)
Custom temperature ranges available 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, О±VZ.
Although the LT1009 needs no adjustments, a third terminal (ADJ) allows the reference voltage to be adjusted
В±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.
Figure 1. SYMBOL
ANODE CATHODE ADJ ORDERING INFORMATION (1) …
