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Texas Instruments LM336D-2-5
- Part No.:
- LM336D-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336D-2-5.pdf
- Description:
- IC VREF SHUNT 4% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:258
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Product details
Overview
LM336D-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 dynamic impedance at 1 mA, and specified temperature stability over 0°C to 70°C. It operates as a low-temperature-coefficient Zener-type reference with adjustable output via the ADJ pin, commonly used in digital voltmeters, 5-V logic-derived reference circuits, and op-amp biasing.
For engineers reviewing the LM336D-2-5 datasheet, LM336D-2-5 pinout, LM336D-2-5 application, or LM336D-2-5 equivalent, key selection criteria include its trimmable temperature coefficient, 400 µA to 10 mA operating current range, fast turn-on response, and compatibility with both positive and negative reference configurations in precision analog systems.
Technical Context
The LM336D-2-5 implements a bandgap-derived 2.5-V reference core with internal trimming capability via the ADJ terminal, enabling minimization of temperature drift across its 0°C to 70°C operating range. Its three-terminal architecture separates cathode, anode, and adjustment functions-unlike two-terminal Zeners-allowing precise calibration of both output voltage and thermal coefficient.
It delivers stable regulation under varying load conditions due to low 0.27-Ω dynamic impedance at 1 mA and maintains long-term stability with ≤20 ppm/khr drift. The device supports bidirectional reference use (positive or negative polarity) and integrates internal circuitry for fast turn-on and low-noise operation up to 10 kHz.
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% initial accuracy. |
| Temperature Range | 0°C to 70°C; validated for commercial-grade instrumentation and embedded control applications. |
| Dynamic Impedance | 0.27 Ω at 1 mA; ensures minimal output voltage shift under load transients in feedback-sensitive circuits. |
| Operating Current | 400 µA to 10 mA; supports low-power sensor interfaces and high-current reference buffering without external amplification. |
| Tempco (ΔVZ/ΔT) | 1.8–6 mV full-range; allows trimming to <10 ppm/°C for high-stability measurement front-ends. |
| Long-Term Drift | ≤20 ppm/khr; guarantees reference integrity over years in unattended monitoring systems. |
| Noise Density | 250 nV/√Hz at 1 kHz; suitable for 16-bit ADC reference without added filtering. |
Pinout & Package
LM336D-2-5 uses an 8-pin SOIC (D) package with 1.27-mm lead pitch and 1.75-mm maximum height. Pin 1 is identified by a notch or beveled corner; pins 1–4 and 5–8 are on opposite sides of the body. The device has three active terminals (CATHODE, ANODE, ADJ); pins 1, 2, 3, 5, 6, and 7 are NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CATHODE (Pin 4) | Output reference node | Provides regulated 2.5-V output; connects to load or op-amp input; sinks current during regulation. |
| ANODE (Pin 8) | Return path | Serves as reference ground or negative rail connection; required for proper shunt operation. |
| ADJ (Pin 3) | Trim control | Allows external resistor network to adjust reference voltage and minimize temperature coefficient. |
| Pins 1,2,5,6,7 | No internal connection | Must remain unconnected; no routing or grounding required on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable temperature coefficient | Enables user trimming to achieve <10 ppm/°C drift in critical metrology applications. |
| Low dynamic impedance | 0.27 Ω ensures <0.1 mV output shift per 1 mA load change-critical for high-resolution DAC references. |
| Bidirectional reference capability | Supports both positive and negative voltage reference topologies without component rework. |
| Fast turn-on time | Stabilizes within microseconds-essential for power-supply sequencing and wake-up circuits. |
| Wide operating current range | 400 µA minimum enables ultra-low-power IoT sensor nodes; 10 mA max supports driving multiple op-amps. |
Applications
| Digital Voltmeter Reference | 5-V Logic-Derived Reference |
|---|---|
Use Scenario: High-accuracy benchtop DVM measuring 0–10 V full-scale with 16-bit resolution. IC Role / Device Role / Timing Role: Primary 2.5-V reference for SAR ADC and scaling amplifier. Use Value: ±1% initial tolerance and ≤6 mV tempco ensure <0.02% measurement error across lab temperature variations. | Use Scenario: Industrial PLC I/O module deriving analog input reference from shared 5-V logic rail. IC Role / Device Role / Timing Role: Stable 2.5-V reference for 12-bit ADC inputs and analog output buffers. Use Value: Low 0.27-Ω impedance prevents crosstalk-induced errors when multiple channels share the same 5-V supply. |
| Op-Amp Precision Biasing | Programmable Current Source Reference |
Use Scenario: Medical ECG front-end using rail-to-rail op-amps with mid-supply biasing. IC Role / Device Role / Timing Role: Generates precise VCC/2 reference for op-amp common-mode setting. Use Value: Trimmable ADJ pin allows compensation of PCB trace resistance and layout asymmetry to maintain <1 mV offset. | Use Scenario: Calibration-grade current source delivering 100 µA–10 mA with <0.1% accuracy. IC Role / Device Role / Timing Role: Sets reference voltage for LM334-based current mirror configuration. Use Value: 20 ppm/khr long-term drift ensures calibration validity over 12-month intervals without field recalibration. |
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 | 2.5-V adjustable shunt regulator; higher 0.2-Ω typical impedance; requires external resistors for 2.5-V setpoint; no dedicated ADJ pin for tempco trimming. | Lacks integrated tempco adjustment; suited for cost-sensitive power supply feedback-not metrology-grade references. | Select TL431ACDR only when absolute temperature stability is secondary to BOM consolidation and cost. |
| REF3025AIDBZR | 2.5-V series reference; 3.3-V min input; 50-µA quiescent current; 75 ppm/°C tempco; no trimming capability. | Requires higher headroom voltage; unsuitable for low-voltage or bidirectional reference use; fixed tempco limits high-precision calibration. | Choose REF3025AIDBZR only if system design permits series topology and tolerates higher supply overhead. |
Compared with TL431ACDR and REF3025AIDBZR, the LM336D-2-5 uniquely combines trimmable temperature coefficient, bidirectional operation, and sub-1-mV load regulation in a shunt topology-making it irreplaceable in portable calibration equipment and multi-rail instrumentation where layout flexibility and long-term stability are mandatory.
Availability
LM336D-2-5 is available at Aetrix Electronics and suitable for digital voltmeters, 5-V logic-derived reference circuits, and op-amp precision biasing requiring stable component supply across commercial temperature ranges.
Supply support for LM336D-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 expertise in precision reference design and manufacturing.
The LM336 family was developed to deliver factory-trimmable, low-drift shunt references for test equipment and industrial control systems where Zener-based alternatives lacked stability and adjustability.
FAQ
What is the operating temperature range for LM336D-2-5?
The LM336D-2-5 is characterized for operation from 0°C to 70°C, matching the LM336-2.5 grade specification. This range is validated per TI's SLVS063E datasheet and applies specifically to the SOIC-packaged LM336D-2-5 variant-not the wider-range LM236-2.5 or LM336B-2.5 versions. Operation outside this range may result in unguaranteed performance or accelerated aging.
Can LM336D-2-5 be used as a negative voltage reference?
Yes, LM336D-2-5 supports bidirectional reference use: connecting the ANODE to a negative rail and CATHODE to signal ground creates a −2.5-V reference. This configuration is explicitly supported in TI's application diagrams (e.g., Figure 5), and the internal circuitry is designed for symmetrical operation-unlike standard Zener diodes which lack controlled reverse conduction characteristics.
How do I trim the temperature coefficient of LM336D-2-5?
Trim the temperature coefficient of LM336D-2-5 using the ADJ pin (Pin 3) with a two-resistor network between CATHODE and ANODE, as shown in TI's Figure 5. Adjust the 2.49-kΩ resistor while monitoring output vs. temperature until drift is minimized. The ADJ terminal provides direct access to the internal bandgap core's bias node, enabling fine tempco correction without altering reference voltage setpoint.
What is the minimum operating current for LM336D-2-5?
The minimum recommended operating current for LM336D-2-5 is 400 µA, as specified in the "Wide Operating Current" feature and confirmed in electrical characteristics tables. Below this level, regulation degrades-dynamic impedance rises above 1 Ω, and temperature stability falls outside guaranteed limits. For battery-powered designs, ensure current remains ≥400 µA across all operating conditions.
Is LM336D-2-5 RoHS compliant?
Yes, LM336D-2-5 is RoHS compliant, as confirmed in TI's Package Option Addendum: "RoHS: Yes" with NIPDAU lead finish and Level-1 MSL rating. This compliance applies to all production lots shipped after October 2003 per TI's revision history, and the device meets EU Directive 2011/65/EU requirements without exemptions.
LM336D-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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
LM336D-2-5 FAQ
1.How can I place an order for LM336D-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336D-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 LM336D-2-5 reliable?
The price and inventory of LM336D-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 LM336D-2-5 is usually 5 days.
3.What payment methods are accepted for LM336D-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336D-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336D-2-5?
LM336D-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336D-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 LM336D-2-5?
For technical support, including LM336D-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336D-2-5 requirements.
6.How does Aetrix verify that LM336D-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336D-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 LM336D-2-5 meets industry standards.
7.What is the process for return or replacement of LM336D-2-5?
All LM336D-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336D-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 LM336D-2-5 part is unused and in its original packaging.
Return procedure for LM336D-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM336D-2-5 Tags
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