2.5V Reference

The LT1009 is a precision trimmed 2.5V shunt regulator diode featuring a maximum initial tolerance of only ±5mV. The low dynamic impedance and wide operating current range enhances its versatility. The 0.2% reference tolerance is achieved by on-chip trimming which not only minimizes the initial voltage tolerance but also minimizes the temperature drift.

Even though no adjustments are needed with the LT1009, a third terminal allows the reference voltage to be adjusted ±5% to calibrate out system errors. In many applications, the LT1009 can be used as a pin-to-pin replacement of the LM136 and the external trim network eliminated.

For a lower drift 2.5V reference, see the LT1019 data sheet.

Applications

* Reference for 5V Systems

* 8-Bit A/D and D/A Reference

* Digital Voltmeters

* Current Loop Measurement and Control Systems

* Power Supply Monitor

* Maximum Initial Tolerance: 0.2%

* Guaranteed Temperature Stability

* Maximum 0.6Ω Dynamic Impedance

* Wide Operating Current Range

* Directly Interchangeable with LM136 for Improved Performance

* No Adjustments Needed for Minimum Temperature Coefficient

* Available in 8-Lead SO and MSOP Packages and 3-Lead TO-92 Package