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STMicroelectronics LM336BDT
- Part No.:
- LM336BDT
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336BDT.pdf
- Description:
- IC VREF SHUNT 2% 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,493
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Product details
Overview
LM336BDT from STMicroelectronics is a precision 2.5V shunt voltage reference IC with adjustable output, low 0.2Ω dynamic impedance, ±10mV initial accuracy (2.49V typ.), and guaranteed temperature stability over 0°C to +70°C. It functions as a programmable Zener replacement in feedback paths of precision regulators, ADC/DAC biasing, and calibration circuits.
For engineers reviewing the LM336BDT datasheet, LM336BDT pinout, LM336BDT application, or LM336BDT equivalent, key selection criteria include its 400µA–10mA operating current range, 3.5mV max temperature drift over full range, SO-8 package compatibility, and ADJ-pin-based voltage/temperature coefficient tuning capability.
Technical Context
The LM336BDT implements a bandgap-derived 2.5V reference core with an external adjustment terminal enabling fine-tuning of breakdown voltage and temperature coefficient. Its internal architecture supports stable operation without external capacitors across its specified current range.
It operates exclusively in reverse-biased shunt mode, requiring an external series resistor for current setting. The ADJ pin allows direct connection to a potentiometer or fixed divider to shift VR while preserving thermal performance-critical for trimming amplifier offset or sensor excitation errors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49V typical at 1mA; enables precise 2.5V system biasing with <±10mV initial error |
| Dynamic Impedance | 0.2Ω typical; ensures <0.5mV output shift per 1mA load change-critical for high-PSRR analog stages |
| Operating Current | 400µA to 10mA; supports wide supply margin designs and low-power sensor interfaces |
| Temp Stability | ≤3.5mV over 0°C to +70°C; eliminates need for external compensation in industrial-grade instrumentation |
| Temp Coefficient | Adjustable via ADJ pin; minimized near 2.49V for <10ppm/°C effective drift in calibrated systems |
| Long-Term Drift | 20ppm/year; maintains calibration integrity in metrology and medical equipment without periodic recalibration |
Pinout & Package
LM336BDT is housed in an SO-8 plastic micropackage (ECOPACK® compliant, lead-free second-level interconnect), measuring 4.9mm × 6.0mm × 1.75mm (D × H × A). Pin 1–3 and 6–7 are no-connect; functional terminals are isolated to prevent parasitic coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 4 (V−) | Cathode / Reference Return | Low-impedance ground return path; must be tied directly to system AGND for noise immunity |
| Pin 5 (ADJ) | Voltage & Temp Coefficient Control | Connects to potentiometer wiper or divider node to tune VR ±50mV without degrading thermal performance |
| Pin 8 (V+) | Anode / Supply Input | Accepts unregulated input up to 36V; sets operating current via external series resistor |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reference voltage | Enables factory or field calibration of 2.5V rails using a single external pot-reducing BOM count vs. fixed references |
| 0.2Ω dynamic impedance | Minimizes output perturbation under varying load conditions, supporting stable feedback in precision op-amp circuits |
| Wide 400µA–10mA current range | Permits use with high-value current-setting resistors in battery-powered systems or low-dropout regulator designs |
| SO-8 ECOPACK® packaging | Meets RoHS and JEDEC JESD97 standards; supports automated SMT assembly and thermal reliability in reflow profiles |
Applications
| Precision Power Regulator | ADC/DAC Reference |
|---|---|
Use Scenario: Stabilizing output of linear regulators in test equipment requiring <0.01% output tolerance. IC Role / Device Role / Timing Role: Shunt reference providing error-signal baseline for op-amp-controlled pass transistor. Use Value: 0.2Ω impedance ensures <0.2mV regulation error across 10mA line/load transients-meeting Class A instrument specs. | Use Scenario: Providing stable 2.5V reference for 16-bit SAR ADC in data acquisition modules. IC Role / Device Role / Timing Role: High-accuracy voltage source for ADC internal conversion ladder and external buffer amplifiers. Use Value: 20ppm/year long-term drift prevents calibration drift beyond LSB error over 5-year product lifetime. |
| Sensor Excitation Circuit | Calibration Standard |
Use Scenario: Biasing precision RTD or strain gauge bridges in industrial process transmitters. IC Role / Device Role / Timing Role: Low-noise, temperature-stable excitation source referenced to bridge mid-point. Use Value: Adjustable ADJ pin allows trimming bridge offset to null at 25°C-eliminating manual potentiometer in final test. | Use Scenario: Serving as traceable 2.5V standard in portable calibrators used for field verification of multimeters. IC Role / Device Role / Timing Role: Primary reference element whose output is periodically compared against NIST-traceable standards. Use Value: 3.5mV max temp drift over 0–70°C ensures <0.014% accuracy without oven control-reducing size/power vs. TCXO-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDT | 2.5V fixed reference; no ADJ pin; 0.22Ω impedance; wider -40°C to +125°C range | Requires external resistor network for adjustment; better suited for automotive ambient conditions | Select when extended temperature range or higher production volume justifies redesign effort |
| REF3025AIDBVR | 2.5V fixed reference; 50ppm/°C max drift; 1.8V to 5.5V supply; SOT-23-5 package | No adjustment capability; lower quiescent current (45µA); unsuitable for >10mA loads | Select for ultra-low-power battery systems where trim flexibility is secondary to standby current |
Compared with TL431ACDT and REF3025AIDBVR, the LM336BDT uniquely supports in-circuit voltage and temperature coefficient tuning without additional components-making it optimal for cost-sensitive, field-calibratable industrial instruments where SO-8 footprint and 0°C–70°C operation align with end-equipment requirements.
Availability
LM336BDT is available at Aetrix Electronics and suitable for precision power regulation, ADC/DAC referencing, sensor excitation, and field-calibration standards requiring stable component supply across industrial and test equipment programs.
Supply support for LM336BDT 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 LM336 series belongs to ST's precision analog voltage reference product line, engineered specifically for applications demanding tunable, low-drift shunt references in cost-constrained industrial instrumentation and calibration hardware.
FAQ
What is the minimum operating current for stable regulation?
The LM336BDT achieves stable 2.5V regulation starting at 400µA, verified per datasheet Table 2. Below this, output voltage drops nonlinearly and temperature coefficient degrades. For reliable operation in production designs, maintain ≥500µA with appropriate series resistor calculation based on worst-case input voltage and load.
Can the ADJ pin be left unconnected?
No-the ADJ pin must be connected either to a potentiometer wiper or a fixed resistive divider between V+ and V−. Leaving it floating causes unpredictable reference voltage and thermal drift due to internal node instability. ST's Figure 9 shows the standard 10kΩ pot configuration for full adjustability.
Is LM336BDT pin-compatible with LM336Z in TO-92?
No-LM336BDT uses an SO-8 package with pins 4 (V−), 5 (ADJ), and 8 (V+) active, while LM336Z in TO-92 has different pinout (cathode/anode/adjust) and mechanical dimensions. PCB layout, thermal design, and soldering profiles are not interchangeable; redesign is required for package substitution.
Does LM336BDT require an output capacitor for stability?
No external capacitor is required for basic shunt operation. However, a 100nF ceramic capacitor placed directly between V− and V+ improves high-frequency noise rejection in noisy environments. ST's datasheet Figure 4 confirms stable dynamic impedance response up to 1MHz without added capacitance.
LM336BDT 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:
- ±2%
- 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
LM336BDT FAQ
1.How can I place an order for LM336BDT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BDT 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 LM336BDT reliable?
The price and inventory of LM336BDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336BDT is usually 5 days.
3.What payment methods are accepted for LM336BDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336BDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336BDT?
LM336BDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BDT 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 LM336BDT?
For technical support, including LM336BDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BDT requirements.
6.How does Aetrix verify that LM336BDT is sourced from the original manufacturer or authorized distributors?
All LM336BDT 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 LM336BDT meets industry standards.
7.What is the process for return or replacement of LM336BDT?
All LM336BDT units undergo pre-shipment inspection (PSI). If there is an issue with LM336BDT, 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 LM336BDT part is unused and in its original packaging.
Return procedure for LM336BDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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