The LM94021 is a precision analog output CMOS integrated-circuit temperature sensor that operates at a supply voltage as low as 1.5V. While operating over the wide temperature range of −50°C to +150°C, the LM94021 delivers an output voltage that is inversely proportional to measured temperature. The LM94021's low supply current makes it ideal for battery-powered systems as well as general temperature sensing applications.

Two logic inputs, Gain Select 1 (GS1) and Gain Select 0 (GS0), select the gain of the temperature-to-voltage output transfer function. Four slopes are selectable: −5.5 mV/°C, −8.2 mV/°C, −10.9 mV/°C, and −13.6 mV/°C. In the lowest gain configuration (GS1 and GS0 both tied low), the LM94021 can operate with a 1.5V supply while measuring temperature over the full −50°C to +150°C operating range. Tying both inputs high causes the transfer function to have the largest gain of −13.6 mV/°C for maximum temperature sensitivity. The gain-select inputs can be tied directly to V_DD or Ground without any pull-up or pull-down resistors, reducing component count and board area. These inputs can also be driven by logic signals allowing the system to optimize the gain during operation or system diagnostics.

• LM94021Q is AEC-Q100 Grade 0 Qualified and is Manufactured on an Automotive Grade Flow
• Low 1.5V Operation
• Four Selectable Gains
• Very Accurate Over Wide Temperature Range of 50°C to +150°C
• Low Quiescent Current
• Output is Short-Circuit Protected
• Extremely Small SC70 Package
• Footprint Compatible with the Industry-Standard LM20 Temperature Sensor
• UL Recognized Component

• Local sensor accuracy (Max) (+/- C)
• 1.5
• Operating temperature range (C)
• -50 to 150
• Supply voltage (Min) (V)
• 1.5
• Supply voltage (Max) (V)
• 5.5
• Supply current (Max) (uA)
• 12
• Interface type
• Analog output
• Sensor gain (mV/Deg C)
• -5.5 to -13.6
• Rating
• Automotive
• Features
• UL recognized

LM94021-Q1的完整型号有：LM94021QBIMG/NOPB、LM94021QBIMGX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM94021QBIMG/NOPB，工作温度：-50 to 150，封装：SC70 (DCK)-5，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM94021QBIMG/NOPB的批量USD价格：.566（1000+）

LM94021QBIMGX/NOPB，工作温度：-50 to 150，封装：SC70 (DCK)-5，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM94021QBIMGX/NOPB的批量USD价格：.496（1000+）

LM94021-2QUICK-CALC LM94021 和 LM94022 电压至温度传输函数表