In the field of analog temperature sensing, Texas Instruments’ (TI) LM35 series has become one of the most trusted temperature sensors among engineers thanks to its direct Celsius calibration, linear voltage output, and extremely low power consumption. Among these, the LM35DZ, housed in a classic TO-92 package and rated for an operating range of 0°C to +100°C, is an outstanding value-for-money choice for applications such as consumer electronics, power management, and industrial control. As a professional electronic component supplier, Mingjiada Electronics currently maintains ample stock of the LM35DZ series, offering genuine factory-direct products and fast delivery.
I. Core Technical Features of the LM35
The LM35DZ is the plastic TO-92 package version of the LM35 series. Its output voltage exhibits a precise linear proportional relationship with Celsius temperature, with a proportionality factor of +10 mV/°C. This means that at 0°C, the output is 0 V, and for every 1°C increase in temperature, the output voltage increases by 10 mV, requiring no external calibration or trimming by the user.
Key Parameters at a Glance:
Temperature Range: Rated operating temperature 0°C to +100°C (the LM35 series as a whole supports −55°C to +150°C)
Accuracy: Guaranteed accuracy of ±0.5°C at 25°C; typical nonlinearity across the full temperature range is only ±¼°C
Operating Voltage: Wide supply voltage range of 4 V to 30 V, suitable for a variety of system voltage platforms
Current Consumption: Typical quiescent current is less than 60 µA; self-heating in still air is only 0.08°C, causing virtually no thermal interference to the measured environment
Output Impedance: Low-impedance output—only 0.1 Ω at a 1 mA load—allowing direct driving of ADC or comparator inputs
Package: TO-92 three-pin plastic package, compatible with standard through-hole mounting processes
Another significant advantage of the LM35 is its “factory-calibrated” design. Wafer-level trimming technology ensures that the device delivers typical accuracy of ±¼°C at room temperature, eliminating the need for engineers to add additional calibration circuits or software compensation to the system, thereby significantly shortening the development cycle.
II. Typical Applications of the LM35
Thanks to its linear output, low power consumption, and ease of interfacing, the LM35 has proven applications in multiple fields.
Power Supplies and Battery Management Systems. The LM35 is commonly used for temperature monitoring in battery packs. Since the device consumes only 60 µA of current and generates minimal self-heat, it does not introduce additional errors in battery temperature measurements. In lithium-ion battery management systems, the LM35 can be mounted directly on the surface of the battery cells to provide real-time temperature data to the MCU, which is used for over-temperature protection and adjustments to charging and discharging strategies.
HVAC and Home Appliance Temperature Control. In HVAC systems, electric water heaters, refrigerators, and other home appliances, the LM35 directly converts ambient temperature into a voltage signal, which is then read by a microcontroller after being input into an ADC. Its TO-92 package facilitates integration into existing PCB layouts and offers significant cost advantages.
Portable Medical Devices and Consumer Electronics. The LM35 is suitable for space- and power-sensitive applications such as portable medical devices, mobile phones, disk drives, and gaming devices.
Data Acquisition and Temperature Monitoring Systems. In microcontroller-based multi-point temperature monitoring systems, the LM35 is often used in conjunction with MCUs such as the AT89C51 and ATmega328P. The analog voltage is converted to a digital signal via an ADC and then displayed on an LCD or uploaded to a host computer.
The LM35 exhibits particularly excellent voltage-temperature linearity within the 30°C to 60°C range, which precisely covers the temperature monitoring requirements for most indoor environments and human-related applications.
III. Mingjiada’s LM35 Supply Services
Mingjiada Electronics has long served customers in electronics manufacturing and R&D, establishing stable supply channels in the temperature sensor sector. For the LM35 series, Mingjiada offers the following supply support:
In-stock inventory and rapid delivery. Leveraging its Shenzhen bonded warehouse and global service network, Mingjiada supports the supply of genuine, factory-direct LM35 series products from stock, enabling rapid fulfillment of domestic orders. The LM35DZ is currently an active, in-production device, and TI’s continuous supply ensures stability for long-term procurement.
Comprehensive coverage of packages and models. In addition to the TO-92 package for the LM35DZ, Mingjiada also supplies other package types within the LM35 series, including TO-220 (LM35DT) and SO-8 surface-mount (LM35DM), to meet selection needs at different design stages.
Flexible procurement solutions. Whether for small-batch samples during the R&D phase or bulk purchases during mass production, Mingjiada can provide corresponding tiered pricing and lead time options.
IV. Why Choose the LM35
Compared to thermistors or digital temperature sensors, the LM35 offers significant advantages in the following scenarios:
No calibration required; plug-and-play. The factory-calibrated linear output eliminates the need for look-up tables or Steinhart-Hart equation calculations required by thermistors, as well as the communication protocol configuration required by digital sensors.
Directly drives an ADC. The low-impedance output, combined with a linear ratio of 10 mV/°C, makes the voltage-to-temperature conversion extremely simple—Temperature (°C) = Output Voltage (mV) / 10.
Extremely low self-heating. With a self-heating rate of 0.08°C in still air, it is suitable for measuring objects sensitive to temperature disturbances, such as battery surface temperature monitoring.
Wide voltage compatibility. The 4 V to 30 V supply voltage range allows it to be used with a voltage divider in 3.3 V systems or directly connected to 12 V or 24 V industrial power rails.
For applications requiring a reliable, low-cost, and easy-to-integrate analog temperature sensing solution, the LM35 is a mature choice that has been market-proven over decades. Mingjiada Electronics is committed to supporting the rapid launch of your products with a stable supply of in-stock inventory.
For pricing or inventory information on the LM35, please contact the Mingjiada Electronics sales team to receive the latest quotes and sample support.
Tags: LM35DZ, LM35D, LM35
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