LT1009 Series 2.5V Reference FEATURESDESCRIPTION n Maximum Initial Tolerance: 0.2% The LT®1009 is a precision trimmed 2.5V shunt regula- n Guaranteed Temperature Stability tor diode featuring a maximum initial tolerance of only n Maximum 0.6Ω Dynamic Impedance ±5mV. The low dynamic impedance and wide operating n Wide Operating Current Range current range enhances its versatility. The 0.2% reference n Directly Interchangeable with LM136 for Improved tolerance is achieved by on-chip trimming which not only Performance minimizes the initial voltage tolerance but also minimizes n No Adjustments Needed for Minimum Temperature the temperature drift. Coeffi cient Even though no adjustments are needed with the LT1009, n Available in 8-Lead SO and MSOP Packages and a third terminal allows the reference voltage to be adjusted 3-Lead TO-92 Package ±5% to calibrate out system errors. In many applications, the LT1009 can be used as a pin-to-pin replacement of the APPLICATIONS LM136 and the external trim network eliminated. n For a lower drift 2.5V reference, see the LT1019 data Reference for 5V Systems n sheet. 8-Bit A/D and D/A Reference n Digital Voltmeters L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Current Loop Measurement and Control Systems n Power Supply Monitor TYPICAL APPLICATION2.5V ReferenceOutput Voltage 5V TO 35V 2.53 3.6k 2.52 OUTPUT GUARANTEED 2.51 10k* MAXIMUM LT1009 TRIM 2.50 TYPICAL 2.49 *DOES NOT AFFECT GUARANTEED TEMPERATURE COEFFICIENT. REFERENCE VOLTAGE (V) MINIMUM ±5% TRIM RANGE 2.48 1009 TA01 2.47–50 –25 0 25 50 75 100 125 TEMPERATURE (°C) 1009 TA02 1009ff 1
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