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STMicroelectronics LM336D
- Part No.:
- LM336D
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336D.pdf
- Description:
- IC VREF SHUNT 4.02% 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
LM336D from STMicroelectronics is a precision 2.5V shunt voltage reference IC with adjustable output, low 0.2Ω dynamic impedance, ±3mV initial accuracy at 25°C, and guaranteed temperature stability over 0°C to +70°C. It functions as a programmable Zener replacement in feedback loops of precision regulators, ADC/DAC biasing, and calibration circuits.
For engineers reviewing the LM336D datasheet, LM336D pinout, LM336D application, or LM336D equivalent, key selection criteria include its 400µA–10mA operating current range, 2.5V nominal reference with ADJ pin for fine-tuning, low noise performance, and SO-8 package compatibility with automated assembly.
Technical Context
The LM336D implements a bandgap-derived 2.5V reference core with an external adjustment terminal (Pin 5) enabling precise trimming of output voltage and temperature coefficient. Its internal architecture supports stable operation across wide current variation without requiring minimum load resistors.
It delivers specified performance under reverse-bias conditions only, with forward conduction limited to protection diode behavior. Dynamic impedance remains ≤0.4Ω over full temperature range (0°C to +70°C), ensuring minimal output perturbation during transient load changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.44–2.49V (LM336D, typ. 2.49V at 1mA, 25°C); sets accurate DC bias point for analog signal chains |
| Dynamic Impedance | 0.2–0.4Ω (at 1mA, 25°C); ensures <1mV output shift per 1mA load change, critical for high-resolution measurement |
| Operating Current | 400µA to 10mA; enables use with high-value bias resistors or low-power microcontroller references |
| Temp. Stability | ±1.8mV (0°C to +70°C); maintains <0.07% drift over industrial range, suitable for unheated enclosures |
| Long-Term Drift | 20ppm/year; guarantees <0.005% output change annually, supporting 10+ year calibration intervals |
| Adjust Pin Function | Pin 5 controls reference voltage & tempco via external resistor divider; enables factory trim without laser adjustment |
Pinout & Package
LM336D is supplied in an SO-8 plastic micropackage (ECOPACK®, lead-free second-level interconnect), compatible with standard surface-mount reflow profiles and JEDEC-compliant tape-and-reel handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 6, 7 | No Connect (NC) | Internally unconnected; must remain floating or tied to ground per layout best practice |
| 4 | V− (Cathode) | Reference output node; connects to system ground or feedback node in shunt configuration |
| 5 | ADJ (Adjust) | External resistor connection point to tune reference voltage and minimize temperature coefficient |
| 8 | V+ (Anode) | Current input terminal; supplies operating current from positive rail through series resistor |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reference voltage | Enables post-manufacture calibration to ±0.5% without component replacement |
| Low dynamic impedance | 0.2Ω typical ensures stable reference under varying DAC/ADC load currents |
| Wide operating current range | 400µA–10mA supports both ultra-low-power sensor nodes and high-speed data acquisition systems |
| Guaranteed tempco stability | Specified over 0°C to +70°C - no derating required for commercial-grade embedded control |
Applications
| Precision ADC Biasing | Programmable Power Supply Reference |
|---|---|
Use Scenario: Providing stable 2.5V reference for 16-bit SAR ADCs in portable test equipment. IC Role / Device Role / Timing Role: Shunt voltage reference establishing absolute scale for analog-to-digital conversion. Use Value: 0.2Ω dynamic impedance limits code-dependent reference droop to <0.5 LSB, preserving ENOB. | Use Scenario: Setting output voltage in digitally controlled lab power supplies with ±0.1% setpoint accuracy. IC Role / Device Role / Timing Role: Adjustable shunt reference in op-amp feedback loop controlling pass transistor gate. Use Value: ADJ pin allows trimming to compensate for op-amp offset and resistor tolerance, achieving final setpoint error <±0.05%. |
| Calibration Standard for Field Instruments | Low-Noise Sensor Signal Conditioning |
Use Scenario: Portable calibrator generating traceable 2.5V output for field verification of pressure transmitters. IC Role / Device Role / Timing Role: Primary voltage standard referenced to NIST-traceable standards during factory calibration. Use Value: 20ppm/year long-term drift enables annual recalibration without hardware replacement. | Use Scenario: Biasing low-noise instrumentation amplifiers in seismic sensor front-ends. IC Role / Device Role / Timing Role: Low-noise DC reference source minimizing added thermal and flicker noise in gain stage. Use Value: Specified Zener noise <10nV/√Hz at 10Hz enables sub-μV signal resolution in 0.1–10Hz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDR | 2.495V reference, 0.22Ω impedance, but requires ≥1mA min. cathode current; no ADJ pin for tempco tuning | Fixed-reference designs only; unsuitable where temperature coefficient minimization is required | Select when cost sensitivity outweighs need for adjustable tempco and lowest possible drift |
| REF200AIDR | 2.048V reference, 0.15Ω impedance, 10ppm/°C max tempco, but fixed output and higher quiescent current (1.2mA) | Lower-voltage systems (e.g., 3.3V logic domains); not pin-compatible or functionally substitutable | Select when 2.048V matches DAC/ADC full-scale and tighter tempco is prioritized over adjustability |
Compared with TL431ACDR and REF200AIDR, the LM336D uniquely supports active temperature coefficient optimization via its ADJ pin while maintaining industry-leading dynamic impedance and long-term stability-making it optimal for metrology-grade calibration and high-accuracy closed-loop control.
Availability
LM336D is available at Aetrix Electronics and suitable for precision ADC biasing, programmable power supply references, calibration standards for field instruments, and low-noise sensor signal conditioning requiring stable component supply across production lifecycles.
Supply support for LM336D 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The LM336D belongs to ST's precision analog voltage reference product line, engineered specifically for applications demanding stable, adjustable, low-drift references in commercial-temperature environments without external compensation circuitry.
FAQ
What is the minimum operating current for stable regulation?
The LM336D achieves stable 2.5V regulation starting at 400µA, verified across 0°C to +70°C. Below this threshold, output voltage deviates nonlinearly and dynamic impedance rises sharply. Designers must size the series current-limiting resistor to ensure ≥400µA under worst-case input voltage and temperature conditions.
Can the ADJ pin be left unconnected?
No - the ADJ pin (Pin 5) must be connected to either V+ or V− via a resistor network to establish defined reference voltage and temperature coefficient. Leaving it floating causes unpredictable output voltage and degraded tempco performance. Figure 9 in the official datasheet shows the standard 10kΩ potentiometer configuration.
Is LM336D RoHS-compliant and lead-free?
Yes - the LM336D is supplied in an ECOPACK®-certified SO-8 package with lead-free second-level interconnect, compliant with RoHS Directive 2011/65/EU and JEDEC JESD97 marking requirements. The inner box label indicates the lead-free category per JEDEC standard.
How does LM336D differ from LM336BZ?
The LM336D uses an SO-8 package and is rated for 0°C to +70°C operation, while LM336BZ uses a TO-92 package and shares the same temperature range. The 'B' suffix denotes tighter initial tolerance (2.39–2.49V vs. 2.44–2.49V), but both share identical electrical characteristics otherwise. Package choice drives thermal resistance and board-space requirements.
LM336D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.49V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±4.02%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 400 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM336D FAQ
1.How can I place an order for LM336D through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336D 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 LM336D reliable?
The price and inventory of LM336D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336D is usually 5 days.
3.What payment methods are accepted for LM336D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336D?
LM336D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336D 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 LM336D?
For technical support, including LM336D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336D requirements.
6.How does Aetrix verify that LM336D is sourced from the original manufacturer or authorized distributors?
All LM336D 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 LM336D meets industry standards.
7.What is the process for return or replacement of LM336D?
All LM336D units undergo pre-shipment inspection (PSI). If there is an issue with LM336D, 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 LM336D part is unused and in its original packaging.
Return procedure for LM336D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM336D Tags
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