{"id":5469,"date":"2026-06-10T02:30:23","date_gmt":"2026-06-10T02:30:23","guid":{"rendered":"https:\/\/materialparts.com\/lm335az-nopb\/"},"modified":"2026-06-10T02:30:23","modified_gmt":"2026-06-10T02:30:23","slug":"lm335az-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm335az-nopb\/","title":{"rendered":"LM335AZ\/NOPB"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The LM335AZ\/NOPB from Texas Instruments is a precision analog temperature sensor operating as a 2-terminal zener with 10mV\/K output in a TO-92 through-hole package. With +\/-1C initial accuracy at 25C, 400uA to 5mA operating current, less than 1 Ohm dynamic impedance, and easy calibration, it provides a linear Kelvin-proportional voltage output for temperature sensing from -40C to +100C.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u8f93\u51fa\u7c7b\u578b<\/td>\nAnalog, 10 mV\/K (Kelvin-proportional)<\/td>\n<\/tr>\n
Accuracy at 25C<\/td>\n+\/-1C (LM335A version); +\/-3C (LM335)<\/td>\n<\/tr>\n
Accuracy over -40 to +100C<\/td>\n+\/-2.7C typical (calibrated at 25C)<\/td>\n<\/tr>\n
Operating Current<\/td>\n400 uA to 5 mA<\/td>\n<\/tr>\n
Dynamic Impedance<\/td>\nLess than 1 Ohm<\/td>\n<\/tr>\n
Output Voltage at 25C<\/td>\n2.982 V (298.2K x 10mV\/K)<\/td>\n<\/tr>\n
Temperature Coefficient<\/td>\n10 mV\/K (linear)<\/td>\n<\/tr>\n
Calibration<\/td>\nExternal trim pot (third pin ADJ)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +100 C (LM335); -55 to +150C (LM135)<\/td>\n<\/tr>\n
Thermal Resistance<\/td>\n202 C\/W junction-to-ambient (TO-92)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nTO-92 (5.2 x 3.68 mm), through-hole<\/td>\n<\/tr>\n
Status<\/td>\n\u6d3b\u8dc3<\/td>\n<\/tr>\n
RoHS<\/td>\nYes<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Directly calibrated to Kelvin temperature scale<\/li>\n
  • +\/-1C initial accuracy (A grade)<\/li>\n
  • Operates from 400uA to 5mA<\/li>\n
  • Less than 1 Ohm dynamic impedance<\/li>\n
  • Easily calibrated with single external pot<\/li>\n
  • Linear output simplifies interfacing<\/li>\n
  • Low cost precision temperature sensing<\/li>\n
  • TO-92 hermetic and plastic packages<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • General-purpose temperature sensing<\/li>\n
    • Thermocouple cold-junction compensation<\/li>\n
    • Temperature controllers and thermostats<\/li>\n
    • Power supply thermal protection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM335AZ\/NOPB from Texas Instruments is a precision analog temperature sensor operating as a 2-terminal zener with 10mV\/K output in a TO-92 through-hole package. With +\/-1C initial accuracy at 25C, 400uA to 5mA operating current, less than 1 Ohm dynamic impedance, and easy calibration, it provides a linear Kelvin-proportional voltage output for temperature […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36,13],"tags":[],"chip_brand":[138],"class_list":["post-5469","post","type-post","status-publish","format-standard","hentry","category-gate-driver-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"10mV\/K analog temp sensor, +\/-1C, TO-92, zener output","date_code":"","package_case":"TO-92 (5.2 x 3.68 mm), through-hole","in_stock":6213,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm235.pdf","price":"$0.50 @ 1ku","product_introduction":"The LM335AZ\/NOPB from Texas Instruments is a precision analog temperature sensor that operates as a 2-terminal zener diode with a breakdown voltage directly proportional to absolute temperature at 10mV\/K. The A denotes the +\/-1C accuracy grade (vs +\/-3C for LM335), Z denotes the TO-92 plastic package, and \/NOPB indicates lead-free (RoHS compliant). The device outputs a voltage equal to the temperature in Kelvin multiplied by 10mV\/K: at 25C (298.15K), the output is approximately 2.982V. The third pin (ADJ) allows single-point calibration by connecting a 10kOhm potentiometer between the ADJ and negative terminals, trimming the output to the exact value at a known reference temperature. When calibrated at 25C, the LM335A maintains typically less than 1C error over a 100C range. The less-than-1-Ohm dynamic impedance ensures that the output voltage is virtually independent of operating current over the 400uA to 5mA range. The linear Kelvin output simplifies interface circuitry: an ADC with a 2.5V or 3.0V reference can directly measure temperature, and a simple op-amp circuit can convert Kelvin to Celsius by subtracting the 2.7315V offset.","working_principle":"The LM335AZ\/NOPB operates through three subsystems: (1) Zener Temperature Sensing: The core is a bandgap reference circuit where the difference in VBE of two transistors operating at different current densities produces a PTAT (proportional to absolute temperature) voltage. This PTAT voltage is amplified to the 10mV\/K scale factor and drives the zener-like output. The device behaves like a temperature-dependent zener diode: when reverse-biased through a series resistor from a supply, it regulates at a voltage proportional to absolute temperature. (2) Current Regulation: The low dynamic impedance (<1 Ohm) means the output voltage changes by less than 1mV per mA of operating current variation. This allows the device to be powered from any supply voltage through a simple series resistor, as long as the current stays within 400uA to 5mA. The resistor value is calculated as R = (Vsupply - Vout) \/ Ioperating, typically targeting 1mA at the highest operating temperature. (3) Calibration: The ADJ pin connects to the internal divider that sets the output voltage. An external potentiometer between ADJ and the negative terminal adjusts the output by +\/-3C range. When the output is trimmed to read correctly at one temperature (typically 25C = 2.982V), the inherent linearity of the bandgap circuit ensures accuracy across the entire range.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>ADJ<\/td>Input<\/td>Calibration adjust (connect 10k pot to negative)<\/td><\/tr>
      2<\/td>+<\/td>Output<\/td>Positive terminal (10mV\/K output)<\/td><\/tr>
      3<\/td>-<\/td>Power<\/td>Negative terminal (ground reference)<\/td><\/tr><\/table>","application_scenarios":"
      • General temperature sensing with 1mA bias through 6.8kOhm resistor from 10V supply, ADC reads 2.982V at 25C with 10mV\/K slope<\/li>
      • Thermocouple cold-junction compensation using LM335 at the reference junction, subtracting its output from the thermocouple voltage<\/li>
      • Differential temperature measurement using two LM335 devices with an op-amp subtractor, output = 10mV\/K x delta-T<\/li>
      • Simple thermostat using LM335 output compared against a reference voltage by a comparator to control heating\/cooling<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Accuracy<\/th>Output<\/th>Notes<\/th><\/tr>
        LM135H\/NOPB<\/td>TI<\/td>+\/-1C<\/td>10mV\/K<\/td>-55 to +150C, hermetic TO-46<\/td><\/tr>
        TMP235AEDBZR<\/td>TI<\/td>+\/-1C<\/td>10mV\/C<\/td>Celsius output, SOT-23<\/td><\/tr>
        LM335H\/NOPB<\/td>TI<\/td>+\/-3C<\/td>10mV\/K<\/td>Lower accuracy, TO-46 hermetic<\/td><\/tr>
        LMT87LPG<\/td>TI<\/td>+\/-1.5C<\/td>10mV\/C<\/td>Low voltage, TO-92<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=5469"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5469\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5469"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}