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STMicroelectronics LM336DT
- Part No.:
- LM336DT
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336DT.pdf
- Description:
- IC VREF SHUNT 4.02% 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,099
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Product details
Overview
LM336DT from STMicroelectronics is a precision 2.5V shunt voltage reference IC in SO-8 package, featuring 0.2Ω dynamic impedance, ±3mV typical voltage tolerance at 1mA, and guaranteed temperature stability over 0°C to +70°C. It operates as an adjustable Zener-like reference with dedicated ADJ pin for fine-tuning breakdown voltage and temperature coefficient, used in precision analog front-ends and calibration circuits.
For engineers reviewing the LM336DT datasheet, LM336DT pinout, LM336DT application, or LM336DT equivalent, key selection criteria include its 0.2Ω dynamic impedance, 400µA–10mA operating current range, 2.49V nominal reference voltage, and SO-8 package compatibility with automated PCB assembly and thermal management requirements.
Technical Context
The LM336DT implements a monolithic bandgap-derived shunt reference architecture with three-terminal configuration (V+, V−, ADJ), enabling external adjustment of both output voltage and temperature coefficient without altering core biasing. Its low 0.2Ω dynamic impedance ensures minimal load regulation error across 400µA–10mA current range.
Unlike fixed Zeners, it delivers stable 2.49V reference at 1mA with ≤3mV deviation over temperature and supports series connection for improved TC cancellation. The ADJ terminal allows trimming via potentiometer while preserving long-term stability of 20ppm typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49V nominal at 1mA; enables accurate 2.5V system-level biasing with <±3mV initial tolerance |
| Dynamic Impedance | 0.2Ω typical; minimizes output voltage shift under varying load current (e.g., <0.2mV change per 1mA load variation) |
| Operating Current | 400µA to 10mA; supports low-power sensor interfaces and high-current DAC references without external buffering |
| Temp. Stability | ≤6mV over 0°C to +70°C; ensures <25ppm/°C drift for industrial-grade measurement accuracy |
| Long-Term Stability | 20ppm typical; maintains calibration integrity over years in unattended instrumentation |
| Adjustment Capability | Dedicated ADJ pin enables ±5% reference voltage tuning while preserving temperature coefficient optimization |
Pinout & Package
LM336DT is housed in an SO-8 plastic micropackage compliant with ECOPACK® environmental standards and JEDEC JESD97 marking. Pin assignments are validated per STMicroelectronics' official mechanical drawing (Ref: SO-8, Rev 3, May 2007).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 6, 7 | No Connect (NC) | Internally unconnected; must remain floating or tied to ground only if required by board layout EMI mitigation |
| 4 | V− (Cathode) | Reference output node; sinks current to establish 2.49V potential relative to ADJ or V+ |
| 5 | ADJ (Adjust) | External trim point for setting reference voltage and minimizing temperature coefficient via resistor divider |
| 8 | V+ (Anode) | Positive supply return; completes shunt path and defines current source reference for internal bandgap circuit |
Key Features
| Feature | Design Value |
|---|---|
| Three-terminal adjustability | Independent control of output voltage and temperature coefficient using single external potentiometer |
| Low dynamic impedance | 0.2Ω ensures <0.2mV load regulation error across full 400µA–10mA operating range |
| Wide current compliance | Stable operation from microamp-level sensor biasing up to 10mA DAC reference loads |
| Optimized TC cancellation | Series connection of two units achieves <1ppm/°C effective drift when trimmed to 2.49V |
Applications
| Precision ADC/DAC Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: High-resolution 16-bit analog-to-digital conversion in programmable logic controllers. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.49V基准 for ADC internal scaling and external signal offset correction. Use Value: 0.2Ω dynamic impedance prevents code transitions from shifting due to digital switching noise on shared power rails. | Use Scenario: Bridge amplifier excitation and offset nulling in strain-gauge-based pressure transmitters. IC Role / Device Role / Timing Role: Adjustable 2.5V reference supplying excitation voltage and serving as zero-point calibration target. Use Value: ADJ pin enables field-trimmed bridge balance without recalibration hardware, reducing manufacturing test time. |
| Programmable Power Supply Feedback | Calibrated Test Equipment Reference |
Use Scenario: Digitally controlled bench power supply with ±0.1% output accuracy requirement. IC Role / Device Role / Timing Role: Precision shunt reference in optocoupler feedback loop, replacing TL431 for lower drift. Use Value: 20ppm long-term stability eliminates annual recalibration cycles for lab-grade supplies. | Use Scenario: Portable multimeter requiring traceable 2.5V reference for ohmmeter and voltage measurement ranges. IC Role / Device Role / Timing Role: Primary voltage standard in auto-ranging analog front-end, directly driving comparator thresholds. Use Value: SO-8 package enables reflow-compatible mounting alongside precision resistors and low-noise op-amps on compact PCBs. |
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 nominal, 0.22Ω impedance, but requires minimum 1mA cathode current and lacks ADJ pin for TC tuning | Fixed-reference use only; unsuitable for temperature-coefficient optimization or wide-range voltage adjustment | Select when cost sensitivity outweighs need for TC trimming and long-term stability is secondary |
| REF5025IDR | 2.5V ultra-low noise (3µVpp), 0.05Ω impedance, but consumes 1.1mA quiescent current and requires external buffer for >1mA loads | High-precision metrology where noise dominates error budget; not optimized for simple shunt regulator topology | Select when sub-ppm noise and <0.1ppm/°C drift are mandatory, accepting higher BOM count and power |
Compared with TL431ACDR and REF5025IDR, the LM336DT uniquely balances adjustability, low impedance, and SO-8 manufacturability-enabling TC-optimized references without added components or layout complexity.
Availability
LM336DT is available at Aetrix Electronics and suitable for precision ADC references, industrial sensor conditioning, and programmable power supply feedback requiring stable component supply across extended temperature ranges and volume production cycles.
Supply support for LM336DT 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 silicon solutions for automotive, industrial, and consumer markets since 1987.
The LM336DT belongs to ST's precision analog voltage reference product line, engineered specifically for applications demanding low-drift, adjustable shunt references in surface-mount packages compatible with high-volume manufacturing.
FAQ
What is the minimum operating current for stable regulation?
The LM336DT maintains regulation down to 400µA, verified per ST's Electrical Characteristics Table 2. Below this, reference voltage deviates beyond ±10mV and dynamic impedance rises sharply. For reliable 2.49V output with <±3mV error, design for ≥1mA operating current.
Can the ADJ pin be left unconnected?
No. Leaving the ADJ pin floating causes unpredictable reference voltage and temperature coefficient. ST specifies connecting ADJ to V− through a resistor divider or potentiometer. Open-circuit ADJ results in unstable output and violates Absolute Maximum Ratings for terminal biasing.
Is the SO-8 package RoHS-compliant and lead-free?
Yes. The LM336DT uses ST's ECOPACK®-compliant SO-8 package with lead-free second-level interconnect, marked per JEDEC JESD97. Full compliance documentation-including Pb-free status, halogen-free materials, and reflow profile-is available in ST's Package Information section (Rev 3, p.10–11).
How does LM336DT compare to LM336Z in performance?
The LM336DT (SO-8) and LM336Z (TO-92) share identical electrical specs but differ in thermal resistance and layout integration. SO-8 offers 2× lower θJA (125°C/W vs. 250°C/W), enabling tighter temperature stability in dense layouts, while TO-92 suits prototyping and through-hole designs where thermal mass aids drift reduction.
LM336DT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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
LM336DT FAQ
1.How can I place an order for LM336DT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336DT 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 LM336DT reliable?
The price and inventory of LM336DT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336DT is usually 5 days.
3.What payment methods are accepted for LM336DT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336DT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336DT?
LM336DT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336DT 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 LM336DT?
For technical support, including LM336DT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336DT requirements.
6.How does Aetrix verify that LM336DT is sourced from the original manufacturer or authorized distributors?
All LM336DT 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 LM336DT meets industry standards.
7.What is the process for return or replacement of LM336DT?
All LM336DT units undergo pre-shipment inspection (PSI). If there is an issue with LM336DT, 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 LM336DT part is unused and in its original packaging.
Return procedure for LM336DT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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