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, α_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 LT1009 is characterized for operation from –55°C to 125°C.

• 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)

(1) Custom temperature ranges available

• VO (V)
• 2.5
• Reference voltage
• Fixed
• Initial accuracy (Max) (%)
• 0.2
• VO adj (Min) (V)
• 2.5
• VO adj (Max) (V)
• 2.5
• Iz for regulation (Min) (uA)
• 400
• Rating
• Military
• Temp coeff (Max) (ppm/ degree C)
• 35
• Operating temperature range (C)
• -55 to 125
• Iout/Iz (Max) (mA)
• 10

LT1009M的完整型号有：LT1009MKGD1，以下是这些产品的关键参数及官网采购报价：

LT1009MKGD1，工作温度：-55 to 125，封装： (KGD)-0，包装数量MPQ：100个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：Call TI，TI官网LT1009MKGD1的批量USD价格：7.231（1000+）

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