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Texas Instruments LM336DR-2-5
- Part No.:
- LM336DR-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336DR-2-5.pdf
- Description:
- IC VREF SHUNT 4% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:502
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Product details
Overview
LM336DR-2-5 from Texas Instruments is a precision 2.5-V shunt voltage reference diode in an 8-pin SOIC package, featuring ±1% initial tolerance, 0.27-Ω typical dynamic impedance at 1 mA, and temperature stability of ≤6 mV over 0°C to 70°C. It operates as a low-temperature-coefficient Zener-type reference for analog-to-digital converters, power supply feedback loops, and instrumentation amplifier biasing.
For engineers reviewing the LM336DR-2-5 datasheet, LM336DR-2-5 pinout, LM336DR-2-5 application, or LM336DR-2-5 equivalent, key selection criteria include its adjustable temperature coefficient via the ADJ pin, wide operating current range (400 µA to 10 mA), low noise performance (≤1 µV/√Hz at 1 kHz), and compatibility with 5-V logic rail derivation.
Technical Context
The LM336DR-2-5 implements a bandgap-derived 2.5-V reference core with external trim capability on the ADJ terminal, enabling minimization of temperature drift across its specified 0°C to 70°C operating range. Its internal circuitry includes precision resistive dividers and matched transistor pairs to stabilize output against process and thermal variation.
As a three-terminal shunt regulator, it functions identically whether referenced to ground (cathode grounded) or floating (anode grounded), supporting both positive and negative voltage reference configurations. The device draws only 400 µA minimum current, enabling use in ultra-low-power systems without sacrificing accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V nominal at 1 mA; enables accurate 2.5-V generation from 5-V supplies with <±1% error budget. |
| Initial Tolerance | ±1% at 25°C; ensures first-pass calibration success in production test without trimming. |
| Dynamic Impedance | 0.27 Ω typical at 1 mA; maintains stable output under load transients up to 10 mA. |
| Temp Stability | ≤6 mV over 0°C to 70°C; supports industrial-grade measurement accuracy without external compensation. |
| Operating Current | 400 µA to 10 mA; allows design flexibility from battery-powered sensors to high-current feedback networks. |
| Long-Term Drift | 20 ppm/khr; guarantees reference stability over multi-year deployments in embedded systems. |
| Noise Density | ≤1 µV/√Hz at 1 kHz; preserves signal integrity in high-resolution ADC front-ends. |
Pinout & Package
LM336DR-2-5 is housed in an 8-pin SOIC (D) package with 1.27-mm pitch, 3.91-mm body width, and 1.75-mm maximum height. Pin 1 is located in quadrant Q1 per tape-and-reel orientation standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | NC | No internal connection; must be left unconnected or tied to ground for mechanical stability. |
| Pin 2 | NC | No internal connection; electrically isolated; no routing required. |
| Pin 3 | NC | No internal connection; unused pad; avoid solder bridging. |
| Pin 4 | Anode | Current sink terminal when used as negative reference; connects to system ground in standard configuration. |
| Pin 5 | Cathode | Reference output node; delivers regulated 2.5 V when current flows into this pin from external source. |
| Pin 6 | NC | No internal connection; floating; no electrical function. |
| Pin 7 | NC | No internal connection; reserved; leave unconnected. |
| Pin 8 | ADJ | Trim terminal for temperature coefficient adjustment; connected to external potentiometer for drift minimization. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable temperature coefficient | Enables user trimming of ∆VZ/∆T to <1.8 mV over full range via ADJ pin, critical for precision metrology. |
| Low dynamic impedance | 0.27 Ω at 1 mA ensures minimal output voltage shift (<2.7 mV) during 10-mA load steps. |
| Wide operating current range | 400 µA–10 mA operation supports both ultra-low-power sensor nodes and high-stability power supply references. |
| Fast turn-on response | Stabilizes within <10 µs after current application, suitable for pulsed-reference applications like sampling ADCs. |
| Bipolar reference capability | Functions as either positive (cathode output) or negative (anode output) reference without circuit modification. |
Applications
| Digital Multimeter Reference | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: High-accuracy DC voltage measurement using 16-bit SAR ADC with ratiometric scaling. IC Role / Device Role / Timing Role: Provides stable 2.5-V reference for ADC VREF input, directly sourced from 5-V logic rail. Use Value: Enables ±0.01% full-scale accuracy by limiting reference drift to ≤6 mV across operating temperature. | Use Scenario: Isolated 4–20 mA transmitter with microcontroller-based calibration. IC Role / Device Role / Timing Role: Serves as primary voltage reference for DAC output stage and current-sense amplifier offset nulling. Use Value: Maintains loop accuracy within ±0.1% over 0°C–70°C ambient due to low tempco and long-term stability. |
| Programmable Power Supply Feedback | Medical Patient Monitor Front-End |
Use Scenario: Adjustable bench power supply with digital voltage setpoint control. IC Role / Device Role / Timing Role: Shunt reference in op-amp error amplifier feedback path, setting precise output voltage. Use Value: Delivers <0.05% line/load regulation via 0.27-Ω dynamic impedance and 400 µA–10 mA compliance range. | Use Scenario: Low-noise ECG signal conditioning with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-noise 2.5-V reference for ADC reference buffer and PGA gain-setting network. Use Value: Contributes <0.5 µV RMS noise in 0.1–10 Hz band, preserving diagnostic signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM336BDR-2-5 | ±0.5% initial tolerance (vs. ±1%), tighter tempco (≤3 mV over 0°C–70°C), same SOIC-8 package and pinout. | Required where higher initial accuracy or lower drift is mandated, e.g., calibration equipment. | Select LM336BDR-2-5 when tighter tolerance justifies cost premium; otherwise LM336DR-2-5 suffices for general industrial use. |
| TL431ACDR | 2.5-V adjustable shunt regulator with 2% tolerance, 0.22-Ω impedance, but requires external resistor divider for 2.5-V setting. | Suitable for cost-sensitive designs where board space permits two external resistors and ±2% tolerance is acceptable. | Choose TL431ACDR only if existing BOM already uses TL431 family; LM336DR-2-5 offers better accuracy and simpler layout. |
Compared with LM336BDR-2-5, the LM336DR-2-5 trades ±0.5% tolerance for broader availability and lower unit cost, while retaining identical pinout and thermal performance; versus TL431ACDR, it eliminates external components and improves initial accuracy by 1%, simplifying design validation.
Availability
LM336DR-2-5 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and medical instrumentation requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM336DR-2-5 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 experience in precision reference design.
The LM336 series was developed specifically for high-stability, low-drift voltage referencing in portable and industrial measurement systems where Zener-based alternatives lacked temperature predictability.
FAQ
What is the operating temperature range for LM336DR-2-5?
The LM336DR-2-5 is characterized for operation from 0°C to 70°C. This range is explicitly defined in the TI datasheet SLVS063E and applies to all SOIC-packaged LM336-2.5 variants including LM336DR-2-5. Operation outside this range may result in increased voltage drift or reduced reliability.
Can LM336DR-2-5 be used as a negative voltage reference?
Yes, LM336DR-2-5 can function as a negative voltage reference by grounding the cathode and sourcing current into the anode. Its symmetrical shunt architecture supports bidirectional polarity use without modification - a key feature confirmed in the "description/ordering information" section of the datasheet.
How is the ADJ pin used in LM336DR-2-5?
The ADJ pin on LM336DR-2-5 connects to an external potentiometer to adjust the device's temperature coefficient. Per Figure 5 in SLVS063E, a 10-kΩ trimmer between ADJ and cathode enables minimization of ∆VZ/∆T, achieving <1.8 mV drift over 0°C–70°C when properly calibrated.
What is the maximum reverse current rating for LM336DR-2-5?
The absolute maximum reverse current (IR) for LM336DR-2-5 is 20 mA, as specified in the "absolute maximum ratings" table of SLVS063E. Exceeding this value risks permanent damage; recommended operating current remains 400 µA to 10 mA for optimal stability and longevity.
Does LM336DR-2-5 require external capacitors for stability?
No, LM336DR-2-5 does not require external capacitors for basic operation. Its internal design ensures stability across the full 400 µA–10 mA current range without added capacitance. However, a 0.1-µF ceramic capacitor from cathode to ground is recommended in noisy environments to suppress high-frequency ripple, per TI application guidance.
LM336DR-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.49V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±4%
- 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
LM336DR-2-5 FAQ
1.How can I place an order for LM336DR-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336DR-2-5 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 LM336DR-2-5 reliable?
The price and inventory of LM336DR-2-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336DR-2-5 is usually 5 days.
3.What payment methods are accepted for LM336DR-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336DR-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336DR-2-5?
LM336DR-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336DR-2-5 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 LM336DR-2-5?
For technical support, including LM336DR-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336DR-2-5 requirements.
6.How does Aetrix verify that LM336DR-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336DR-2-5 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 LM336DR-2-5 meets industry standards.
7.What is the process for return or replacement of LM336DR-2-5?
All LM336DR-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336DR-2-5, 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 LM336DR-2-5 part is unused and in its original packaging.
Return procedure for LM336DR-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM336DR-2-5 Tags
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