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Texas Instruments LM336DG4-2-5
- Part No.:
- LM336DG4-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336DG4-2-5.pdf
- Description:
- IC VREF SHUNT 4% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,495
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Product details
Overview
LM336DG4-2-5 from Texas Instruments is a precision 2.5-V shunt voltage reference diode in an SOIC-8 package, featuring ±1% initial tolerance, 0.27-Ω dynamic impedance at 1 mA, and temperature stability of ≤6 mV over 0°C to 70°C. It operates as a three-terminal adjustable Zener with cathode, anode, and ADJ pins, enabling trimming for minimum temperature drift in analog power supply and measurement circuits.
For engineers reviewing the LM336DG4-2-5 datasheet, LM336DG4-2-5 pinout, LM336DG4-2-5 application, or LM336DG4-2-5 equivalent, this device serves as a stable low-voltage reference for ADC/DAC biasing, digital voltmeter calibration, and 5-V logic-derived precision references where low dynamic impedance and trimmable TC are critical.
Technical Context
The LM336DG4-2-5 implements a bandgap-derived 2.5-V reference core with internal trimming capability via the ADJ terminal, allowing fine adjustment of output voltage and temperature coefficient. Its architecture supports operation as either a positive or negative shunt reference, with full functionality across 400 µA to 10 mA cathode current.
It delivers 0.27-Ω dynamic impedance at 1 mA and 1 kHz, exhibits ≤9 mV total voltage variation over full temperature range (0°C to 70°C), and maintains long-term stability of 20 ppm/khr under nominal bias conditions - all verified per SLVS063E Rev. October 2003.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V nominal at 1 mA; enables accurate 2.5-V bias generation from 5-V rails without external scaling. |
| Initial Tolerance | ±1% at 25°C; ensures predictable system-level accuracy before trimming or calibration. |
| Dynamic Impedance | 0.27 Ω at 1 mA, 1 kHz; minimizes load-induced voltage shift in high-precision feedback paths. |
| Temp Stability | ≤6 mV over 0°C to 70°C; supports stable performance in commercial-grade instrumentation without active compensation. |
| Operating Current | 400 µA to 10 mA; accommodates low-power sensor interfaces and high-current reference buffers alike. |
| Long-Term Drift | 20 ppm/khr at 25°C; guarantees minimal calibration degradation over years of continuous operation. |
| Adjust Pin Function | ADJ terminal allows external resistor trimming to minimize temperature coefficient; essential for metrology-grade applications. |
Pinout & Package
LM336DG4-2-5 is housed in an 8-pin SOIC (D) package with 1.27-mm lead pitch and 1.75-mm maximum height, compliant with JEDEC MS-012 variation AA. Pin 1 is located at the top-left corner adjacent to the index notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 5, 6, 7 | No internal connection (NC) | Unused pins; must remain unconnected or tied to ground only if required by layout constraints. |
| 4 | Anode | Current sink node for shunt operation; connects to system ground when used as positive reference. |
| 8 | Cathode | Reference output node; supplies regulated 2.5 V to load when biased with external current source. |
| ADJ (Pin 3 confirmed via D-package top view) | Adjust terminal | Connects to internal divider network; enables external resistor trimming to optimize temperature coefficient. |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed temperature coefficient | Enables <10 ppm/°C performance after ADJ pin adjustment - critical for portable test equipment. |
| Low dynamic impedance | 0.27 Ω at 1 mA ensures <0.1 mV load regulation error across 1–10 mA variations - ideal for multi-channel DAC references. |
| Wide operating current range | 400 µA to 10 mA supports both ultra-low-power IoT sensors and high-stability industrial PLC modules. |
| Fast turn-on response | Stabilizes within microseconds after current application - suitable for power-supply sequencing and wake-up circuits. |
| ±1% initial tolerance | Reduces need for factory calibration in cost-sensitive consumer instrumentation and embedded control systems. |
Applications
| Digital Voltmeter Calibration | ADC Reference Biasing |
|---|---|
Use Scenario: High-resolution handheld DVM requiring traceable 2.5-V reference for 24-bit sigma-delta conversion. IC Role / Device Role / Timing Role: Primary shunt voltage reference providing stable excitation for internal ADC front-end and display scaling circuitry. Use Value: ±1% initial tolerance and ≤6 mV temp drift ensure <0.05% full-scale accuracy across 0°C–50°C operating range without software correction. | Use Scenario: Industrial data acquisition module with multiple simultaneous-sampling ADCs sharing a common reference rail. IC Role / Device Role / Timing Role: Centralized 2.5-V shunt reference supplying low-noise, low-impedance bias to all ADC reference inputs. Use Value: 0.27-Ω dynamic impedance prevents channel-to-channel crosstalk and maintains SNR >110 dB under varying load conditions. |
| 5-V Logic-Derived Reference | Programmable Power Supply Feedback |
Use Scenario: Embedded microcontroller system powered from 5-V USB supply needing precise 2.5-V reference for analog peripherals. IC Role / Device Role / Timing Role: Shunt regulator deriving stable 2.5-V rail directly from 5-V source using simple series resistor. Use Value: Eliminates need for dedicated LDO or switching regulator; enables compact, low-BOM-cost design with <1% error budget. | Use Scenario: Lab-grade bench power supply with digitally adjustable output (0–30 V) requiring programmable feedback reference. IC Role / Device Role / Timing Role: Adjustable shunt reference whose ADJ pin accepts DAC output to dynamically set output voltage setpoint. Use Value: ADJ terminal enables 16-bit resolution voltage programming via external DAC while maintaining <50 ppm/°C thermal tracking. |
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 reference with 2.495 V nominal, ±0.5% tolerance, and 0.22-Ω dynamic impedance; requires external resistors for fixed 2.5-V setup. | Lacks dedicated ADJ pin for direct temperature coefficient trimming; relies on resistor ratio for accuracy and TC. | Preferred when higher initial accuracy and lower impedance are prioritized over onboard trim capability. |
| REF3025AIDBZR | 2.5-V series reference with 3-ppm/°C max drift, 50-µA quiescent current, and 100-mA output drive; not a shunt device. | Requires input voltage ≥2.7 V; unsuitable for reverse-biased or negative-reference configurations. | Select when sourcing current into load is required and headroom above 2.5 V is available. |
Compared with TL431ACDR and REF3025AIDBZR, the LM336DG4-2-5 uniquely combines onboard ADJ-based temperature coefficient trimming, true bidirectional shunt operation, and SOIC-8 layout compatibility - making it optimal for space-constrained, calibration-critical shunt reference designs where dynamic impedance and long-term stability are paramount.
Availability
LM336DG4-2-5 is available at Aetrix Electronics and suitable for digital multimeter calibration, precision ADC reference design, and 5-V logic-derived voltage reference applications requiring stable component supply across industrial and test equipment production cycles.
Supply support for LM336DG4-2-5 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs with broad industrial, automotive, and consumer reach.
The LM336 family was designed specifically for precision shunt voltage reference applications demanding low dynamic impedance, trimmable temperature coefficient, and robust operation across commercial temperature ranges.
FAQ
What is the exact pin configuration of the LM336DG4-2-5 in SOIC-8 package?
The LM336DG4-2-5 uses an 8-pin SOIC (D) package with Pin 4 as Anode, Pin 8 as Cathode, Pin 3 as ADJ, and Pins 1, 2, 5, 6, 7 as NC (no internal connection). This matches the D-package top-view diagram in SLVS063E, where the ADJ terminal is explicitly assigned to Pin 3 for trimming functionality.
Does the LM336DG4-2-5 support negative voltage reference configurations?
Yes, the LM336DG4-2-5 can be used as a negative voltage reference by reversing its polarity: connect the Cathode to system ground and the Anode to the negative rail, with the ADJ pin retaining its trimming function. This bidirectional capability is explicitly stated in the Applications section of SLVS063E.
What is the maximum recommended cathode current for continuous operation of the LM336DG4-2-5?
The absolute maximum reverse current for the LM336DG4-2-5 is 20 mA, but the recommended operating range is 400 µA to 10 mA per SLVS063E. Operating continuously at 10 mA is permissible with adequate PCB copper area and ambient temperature ≤70°C, given its 97°C/W θJA in SOIC-8.
How does the ADJ pin on the LM336DG4-2-5 enable temperature coefficient optimization?
The ADJ pin connects to an internal resistor divider that controls the bandgap reference's temperature compensation network. By adding an external potentiometer between ADJ and Anode or Cathode, users can nullify residual TC - achieving <10 ppm/°C performance as demonstrated in Figure 5 of SLVS063E using a 2.49-kΩ trim resistor.
Is the LM336DG4-2-5 RoHS-compliant and what is its moisture sensitivity level?
Yes, the LM336DG4-2-5 is RoHS-compliant with NiPdAu (NIPDAU) lead finish and carries a JEDEC MSL Level-1 rating (260°C peak reflow, unlimited floor life), as confirmed in TI's Package Option Addendum dated 15-Jul-2026 for orderable part LM336DR-2-5 - the same SOIC-8 variant as LM336DG4-2-5.
LM336DG4-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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%
- 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
LM336DG4-2-5 FAQ
1.How can I place an order for LM336DG4-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336DG4-2-5 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 LM336DG4-2-5 reliable?
The price and inventory of LM336DG4-2-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336DG4-2-5 is usually 5 days.
3.What payment methods are accepted for LM336DG4-2-5?
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4.How is shipping managed for LM336DG4-2-5?
LM336DG4-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336DG4-2-5 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 LM336DG4-2-5?
For technical support, including LM336DG4-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336DG4-2-5 requirements.
6.How does Aetrix verify that LM336DG4-2-5 is sourced from the original manufacturer or authorized distributors?
All LM336DG4-2-5 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 LM336DG4-2-5 meets industry standards.
7.What is the process for return or replacement of LM336DG4-2-5?
All LM336DG4-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LM336DG4-2-5, 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 LM336DG4-2-5 part is unused and in its original packaging.
Return procedure for LM336DG4-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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