LM35CAH – TEXAS INSTRUMENTS

The Texas Instruments LM35CAH is a precision, calibrated, Celsius-output temperature sensor in a TO-92 surface-mount package. Unlike its through-hole counterparts, the “H” suffix denotes its smaller, surface-mountable form factor, crucial for space-constrained designs. It operates from a 4V to 30V DC supply, exhibiting a linear output of 10mV/°C, directly proportional to the Celsius temperature. This eliminates the need for external calibration circuits, simplifying design and reducing component count. Its output impedance is low, typically 0.5 Ω, minimizing loading effects. The LM35CAH boasts high accuracy (±1°C at 25°C), making it suitable for applications requiring relatively precise temperature measurement. Common applications include industrial process control, environmental monitoring, and consumer electronics where accurate temperature sensing within a ±1°C tolerance is acceptable. Its low-cost, ease of use, and inherent linearity provide a significant advantage over other temperature sensing methods requiring complex signal conditioning, making it an ideal choice for cost-sensitive, high-volume applications requiring a simple, accurate temperature reading. The TO-92 surface mount package facilitates automated PCB assembly.