LM235D Analog Temperature Sensor IC – TO-92 Package by Texas Instruments

LM235D Overview

The LM235D is a precision temperature sensor designed to provide an accurate analog voltage output directly proportional to absolute temperature. Operating over a broad temperature range, it delivers reliable and linear performance from -40??C to +100??C, making it suitable for various industrial and commercial applications. With a low output impedance and a wide operating voltage range, this device simplifies temperature measurement and integration into analog systems. Its robust design ensures consistent operation under demanding conditions. For detailed specifications and sourcing, visit IC Manufacturer.

LM235D Technical Specifications

Parameter	Specification	Unit
Operating Temperature Range	-40 to +100	??C
Output Voltage	10 mV/K	V/K
Supply Voltage Range	4 to 30	V
Output Impedance	1	?? (typical)
Accuracy	??1??C (typical at 25??C)	??C
Linearity Error	??1??C (max)	??C
Quiescent Current	500	??A (typical)
Package Type	TO-92	–

LM235D Key Features

• Linear Output Voltage Proportional to Absolute Temperature: Simplifies temperature measurement by providing a direct analog voltage output that scales at 10 mV per Kelvin, enabling easy interface with analog-to-digital converters.
• Wide Operating Voltage Range (4V to 30V): Ensures compatibility with various power supply sources, enhancing design flexibility in industrial environments.
• Low Output Impedance: Allows direct connection to measurement circuits without the need for additional buffering, reducing component count and system complexity.
• Wide Temperature Range (-40??C to +100??C): Suitable for harsh environments and extended temperature monitoring applications, ensuring reliable performance across diverse industrial scenarios.

Typical Applications

• Industrial temperature monitoring systems requiring precise and stable temperature sensing over a broad range of environmental conditions.
• HVAC control units that depend on accurate ambient temperature measurement to optimize system performance and energy efficiency.
• Consumer electronics temperature compensation circuits where low power consumption and linear output simplify design.
• Battery management systems to monitor cell temperatures, ensuring safety and operational reliability.

LM235D Advantages vs Typical Alternatives

This temperature sensor offers superior accuracy and linearity compared to generic thermistors and basic temperature transducers, providing a direct voltage output proportional to absolute temperature. Its low output impedance and broad supply voltage range enable straightforward integration with various analog circuits, enhancing design efficiency. The device??s robust operating temperature range and low quiescent current make it a reliable and power-efficient choice for industrial-grade temperature measurement applications.

LM235D Brand Info

The LM235D is a well-established precision temperature sensor originally developed by National Semiconductor and now widely produced by multiple semiconductor manufacturers following the original design. It is part of the LM235 series, recognized for its reliability and accuracy in temperature sensing applications. The sensor??s TO-92 package and standardized performance have made it a preferred choice in industrial instrumentation and embedded system designs globally.

FAQ

What is the output voltage range of the LM235D relative to temperature?

The output voltage of the LM235D is directly proportional to absolute temperature at a scale factor of 10 mV per Kelvin. This means the sensor outputs 2.73 V at 0??C (273 K) and increases linearly with temperature, enabling accurate temperature measurement through voltage reading.

What supply voltage levels can the LM235D operate under?

The sensor functions reliably with a supply voltage ranging from 4 V up to 30 V, providing flexibility in various system designs. This wide voltage range allows the device to be powered by common industrial and commercial power sources without compromising performance.

Is the output of the LM235D suitable for direct connection to microcontroller ADC inputs?

Yes, due to its low output impedance (typically around 1 ??), the sensor can be connected directly to analog-to-digital converter inputs on microcontrollers without requiring additional