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LT1009

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2.5-V integrated reference circuit

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Data sheet

LT1009

ACTIVE
Data sheet Order now

Product details

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 Catalog Temp coeff (max) (ppm/°C) 25 Operating temperature range (°C) -40 to 85 Iout/Iz (max) (mA) 10
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 Catalog Temp coeff (max) (ppm/°C) 25 Operating temperature range (°C) -40 to 85 Iout/Iz (max) (mA) 10
SOIC (D) 8 29.4 mm² 4.9 x 6 TO-92 (LP) 3 19.136 mm² 5.2 x 3.68 TSSOP (PW) 8 19.2 mm² 3 x 6.4
  • Excellent Temperature Stability
  • Initial Tolerance: 0.2% Max
  • Dynamic Impedance: 0.6 Max
  • Wide Operating Current Range
  • Directly Interchangeable With LM136
  • Needs No Adjustment for Minimum Temperature Coefficient
  • Excellent Temperature Stability
  • Initial Tolerance: 0.2% Max
  • Dynamic Impedance: 0.6 Max
  • Wide Operating Current Range
  • Directly Interchangeable With LM136
  • Needs No Adjustment for Minimum Temperature Coefficient

The LT1009 reference circuit is a precision-trimmed 2.5-V shunt regulator featuring low dynamic impedance and a wide operating current range. The maximum initial tolerance is ±5 mV in the LP package and ±10 mV in the D and PW packages. The reference tolerance is achieved by on-chip trimming, which minimizes the initial voltage tolerance and the temperature coefficient, VZ.

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 LT1009C is characterized for operation from 0°C to 70°C. The LT1009I is characterized for operation from –40°C to 85°C.

The LT1009 reference circuit is a precision-trimmed 2.5-V shunt regulator featuring low dynamic impedance and a wide operating current range. The maximum initial tolerance is ±5 mV in the LP package and ±10 mV in the D and PW packages. The reference tolerance is achieved by on-chip trimming, which minimizes the initial voltage tolerance and the temperature coefficient, VZ.

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 LT1009C is characterized for operation from 0°C to 70°C. The LT1009I is characterized for operation from –40°C to 85°C.
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* Data sheet 2.5-V Integrated Reference Circuit datasheet (Rev. N) 11 May 2009
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019

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SOIC (D) 8 Ultra Librarian
TO-92 (LP) 3 Ultra Librarian
TSSOP (PW) 8 Ultra Librarian
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