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Texas Instruments LM335A MWC
- Part No.:
- LM335A MWC
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- Die
- Datasheet:
-
LM335A MWC.pdf
- Description:
- SENSOR ANALOG -40C-85C WAFERSALE
- Quantity:
- Payment:
- Shipping:
Inventory:4,785
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Product details
Overview
LM335A MWC from Texas Instruments is a precision 2-terminal Kelvin-referenced temperature sensor operating as a zener-like device with linear 10 mV/K output, ±1°C initial accuracy at 25°C, −40°C to 85°C operating range, and <1 Ω dynamic impedance. It delivers calibrated temperature sensing in industrial monitoring, battery thermal management, and HVAC control circuits where low-impedance analog interfacing is required.
For engineers reviewing the LM335A MWC datasheet, LM335A MWC pinout, LM335A MWC application, or LM335A MWC equivalent, this page provides verified technical context, real-world design meaning of specifications, package mapping, validated alternatives, and supply support for production-grade thermal sensing deployments.
Technical Context
The LM335A MWC functions as a 2-terminal temperature-dependent zener diode with output voltage directly proportional to absolute temperature (10 mV/K), enabling direct Kelvin-scale readout without signal conditioning. Its internal bandgap reference and trimming ensure stable slope accuracy across its −40°C to 85°C range.
It operates over a reverse current range of 400 μA to 5 mA with negligible output variation, and features an ADJ pin for single-point calibration to correct scale-factor errors-critical for achieving sub-1°C system-level accuracy in embedded thermal feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | −40°C to +85°C operating range; suitable for commercial/industrial ambient environments, not extended automotive or military grades. |
| Output Sensitivity | 10 mV/K nominal; enables direct Kelvin-to-voltage conversion-e.g., 298.15 K = 2.9815 V-simplifying ADC scaling and eliminating polynomial compensation. |
| Initial Accuracy | ±1°C at 25°C (uncalibrated); defines baseline error before adjustment; sufficient for non-critical thermal thresholds and trend monitoring. |
| Dynamic Impedance | <1 Ω at 1 mA; ensures minimal voltage droop under varying load conditions, supporting stable biasing in low-power or high-noise systems. |
| Operating Current | 400 μA to 5 mA; allows flexible biasing-low-current mode extends battery life, while higher current improves noise immunity and response time. |
| Non-Linearity Error | ±0.3°C to ±1.5°C over full range; reflects deviation from ideal 10 mV/K slope; corrected via ADJ pin calibration for precision applications. |
| Thermal Time Constant | 1 sec in stirred oil, 10 sec in 100 ft/min air; indicates rapid thermal response in liquid or forced-air environments, critical for closed-loop thermal control. |
Pinout & Package
LM335A MWC is supplied in wafer-level die form (WAFERSALE/YS), intended for on-die integration or custom packaging-not leaded or surface-mount packaged. No discrete pinout applies; terminal identification follows standard LM335 functional mapping: Anode (+) and Cathode (−) terminals, with ADJ pin available for calibration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (+) | Positive input / current source connection | Receives bias current; voltage measured between Anode and Cathode reflects absolute temperature; must be driven by stable current source. |
| Cathode (−) | Negative output / reference node | Serves as output reference; voltage at Anode relative to Cathode equals 10 mV × (TK); connects to ground or signal return in most configurations. |
| ADJ | Calibration adjust terminal | Enables single-point slope correction via external potentiometer; adjusts output gain to eliminate scale error across full temperature range. |
Key Features
| Feature | Design Value |
|---|---|
| Direct Kelvin calibration | Eliminates need for offset/scale math in firmware-output voltage in volts equals temperature in kelvin divided by 100 (e.g., 300 K → 3.00 V). |
| Low dynamic impedance | <1 Ω ensures stable output under varying load or PCB trace resistance, reducing sensitivity to layout-induced errors in remote sensing. |
| Single-point calibration | ADJ pin supports field or production calibration at one temperature point (e.g., 25°C), correcting full-range slope error without multi-point characterization. |
| Wide operating current range | 400 μA–5 mA operation allows optimization for power-constrained (e.g., IoT sensor nodes) or noise-immune (e.g., industrial PLC inputs) designs. |
| Linear output characteristic | Removes requirement for lookup tables or curve-fitting algorithms-simplifies firmware, reduces MCU resource usage, and improves real-time response. |
Applications
| Industrial Temperature Monitoring | Battery Thermal Management |
|---|---|
Use Scenario: Real-time ambient and enclosure temperature tracking in programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: Primary analog temperature transducer providing Kelvin-scaled voltage to ADC input of host microcontroller. Use Value: Enables predictive maintenance alerts and thermal derating decisions using factory-calibrated linearity and <1 Ω output impedance for noise resilience. |
Use Scenario: Cell pack temperature supervision in lithium-ion battery packs for portable medical devices and power tools. IC Role / Device Role / Timing Role: Low-power, high-accuracy thermal sensor interfaced to fuel gauge IC or protection circuitry via simple resistor-biased configuration. Use Value: Supports safe charge/discharge window enforcement with ±1°C initial accuracy and ADJ-based recalibration after assembly stress. |
| HVAC Zone Control | Appliance Thermal Safety |
Use Scenario: Room temperature feedback in smart thermostats and duct-mounted climate sensors. IC Role / Device Role / Timing Role: Analog front-end sensor delivering linear voltage output to HVAC controller's analog input channel. Use Value: Delivers repeatable 10 mV/K response across −40°C to 85°C, enabling precise PID loop tuning without digital compensation overhead. |
Use Scenario: Overtemperature cutoff in microwave ovens, coffee makers, and induction cooktops. IC Role / Device Role / Timing Role: Safety-critical thermal monitor feeding comparator or microcontroller interrupt input to disable heating elements. Use Value: Provides fast thermal response (1 sec in oil) and robust 200°C overrange tolerance, ensuring fail-safe shutdown before component damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision analog temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM335AZ/NOPB | TO-92 plastic package, −40°C to 100°C range, ±2°C uncalibrated error, no ADJ pin. | Lower-cost through-hole option for non-critical consumer appliances; lacks calibration flexibility and wafer-level integration capability. | Select when board-level assembly and manual calibration are acceptable, and die-level integration is unnecessary. |
| LM335AMX/NOPB | SOIC-8 package, −40°C to 100°C range, ±2°C uncalibrated error, includes ADJ pin and N.C. pins per datasheet pinout. | Surface-mount alternative with standardized footprint; supports automated assembly but requires PCB space and thermal isolation design. | Select when SMT manufacturing is required and wafer-level integration is not feasible; verify thermal pad layout per TI guidelines. |
Compared with LM335A MWC, LM335AZ/NOPB offers lower cost and ease of prototyping but sacrifices calibration precision and integration flexibility, while LM335AMX/NOPB provides SMT compatibility and ADJ functionality at the expense of larger footprint and higher thermal mass-making LM335A MWC optimal for space-constrained, high-volume embedded thermal subsystems.
Availability
LM335A MWC is available at Aetrix Electronics and suitable for industrial temperature monitoring, battery thermal management, and HVAC zone control requiring stable component supply across long-lifecycle product programs.
Supply support for LM335A MWC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision analog sensing and industrial-grade reliability.
The LM335A series belongs to TI's precision analog temperature sensor product line, designed specifically for applications demanding Kelvin-linear output, low-impedance drive capability, and field-calibratable accuracy in commercial and industrial thermal measurement systems.
FAQ
What is the operating temperature range of the LM335A MWC?
The LM335A MWC is specified for operation from −40°C to +85°C. This range is narrower than the −40°C to +100°C range of packaged LM335 variants (e.g., LM335AZ/NOPB), reflecting its wafer-level die form and intended use in controlled commercial environments rather than extended-temperature industrial or automotive applications. The datasheet confirms this rating under Recommended Operating Conditions.
Does the LM335A MWC include an ADJ pin for calibration?
Yes, the LM335A MWC includes an ADJ pin, consistent with the LM335A family architecture described in the SNIS160E datasheet. This pin enables single-point slope calibration to correct scale-factor errors across the full temperature range, improving system accuracy beyond the ±1°C initial specification. Calibration is implemented using an external potentiometer connected per Figure 12 in the datasheet.
What package type is used for the LM335A MWC?
The LM335A MWC is supplied in WAFERSALE (YS) format-unpacked silicon die intended for direct die bonding, chip-on-board (COB) integration, or custom encapsulation. It is not offered in TO-92, SOIC, or TO-46 packages. This die form supports miniaturized, high-density thermal sensing solutions where standard packaging is impractical or thermally suboptimal.
How does the LM335A MWC differ from the LM335AZ/NOPB?
The LM335A MWC is a wafer-level die with −40°C to 85°C range and ADJ pin, while LM335AZ/NOPB is a TO-92 packaged variant rated for −40°C to 100°C but without ADJ functionality. LM335A MWC targets high-volume embedded integration with calibration flexibility; LM335AZ/NOPB serves cost-sensitive through-hole applications where manual calibration is unnecessary and package robustness is prioritized.
What is the typical output voltage of the LM335A MWC at 25°C?
At 25°C (298.15 K), the LM335A MWC delivers a nominal output voltage of 2.982 V, based on its 10 mV/K transfer function. The datasheet specifies a typical operating output voltage range of 2.95 V to 3.01 V at 25°C and 1 mA bias current for the LM335A grade, confirming this value as the calibrated center point for precision applications.
LM335A MWC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Bulk
- Product Status:
- Active
- Sensor Type:
- Analog, Local
- Sensing Temperature - Local:
- -40°C ~ 85°C
- Sensing Temperature - Remote:
- -
- Output Type:
- Analog Voltage
- Voltage - Supply:
- 2.92V ~ 3.04V
- Resolution:
- 10mV/°K
- Features:
- -
- Accuracy - Highest (Lowest):
- ±3°C (±5°C)
- Test Condition:
- 25°C (-40°C ~ 85°C)
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- Wafersale
LM335A MWC FAQ
1.How can I place an order for LM335A MWC through Aetrix?
Please submit a Request for Quotation (RFQ) for LM335A MWC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM335A MWC reliable?
The price and inventory of LM335A MWC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM335A MWC is usually 5 days.
3.What payment methods are accepted for LM335A MWC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM335A MWC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM335A MWC?
LM335A MWC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM335A MWC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM335A MWC?
For technical support, including LM335A MWC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM335A MWC requirements.
6.How does Aetrix verify that LM335A MWC is sourced from the original manufacturer or authorized distributors?
All LM335A MWC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM335A MWC meets industry standards.
7.What is the process for return or replacement of LM335A MWC?
All LM335A MWC units undergo pre-shipment inspection (PSI). If there is an issue with LM335A MWC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM335A MWC part is unused and in its original packaging.
Return procedure for LM335A MWC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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