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Texas Instruments LM336BZ-2.5/LFT1
- Part No.:
- LM336BZ-2.5/LFT1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM336BZ-2.5/LFT1.pdf
- Description:
- IC VREF SHUNT 2% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
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Product details
Overview
LM336BZ-2.5/LFT1 from Texas Instruments is a precision 2.5V shunt voltage reference diode in TO-92 package, rated for 0°C to +70°C operation, with ±1% initial tolerance, 0.2Ω dynamic impedance, and 400 μA to 10 mA operating current range. It serves as a stable low-voltage reference in digital voltmeters, op-amp biasing, and 5V-supply-derived reference circuits.
For engineers reviewing the LM336BZ-2.5/LFT1 datasheet, LM336BZ-2.5/LFT1 pinout, LM336BZ-2.5/LFT1 application, or LM336BZ-2.5/LFT1 equivalent, key selection criteria include temperature stability over 0°C–70°C, trimmable voltage/temperature coefficient, low dynamic impedance, and compatibility with shunt-regulator topologies requiring minimal external components.
Technical Context
The LM336BZ-2.5/LFT1 operates as a monolithic 2.5V zener-based shunt regulator with third-terminal adjustability for voltage and temperature coefficient trimming. Its architecture enables use as either positive or negative reference without polarity reversal circuitry.
It features a low 0.2Ω dynamic impedance at 1 mA reverse current and specified temperature stability of ≤6 mV over 0°C to +70°C when adjusted to 2.490V - enabling high-accuracy feedback in linear regulators and ADC reference buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.490 V (typical, trimmed value for minimum tempco) |
| Initial Tolerance | ±1% (ensures ≤25 mV absolute error at 2.5V nominal) |
| Operating Current | 400 μA to 10 mA (supports low-power sensing and high-current buffering) |
| Dynamic Impedance | 0.2 Ω (minimizes output voltage variation under load transients) |
| Temp Stability | ≤6 mV over 0°C to +70°C (enables stable 12-bit+ ADC references) |
| Temperature Range | 0°C to +70°C (commercial-grade operation, no extended temp derating) |
| Package | TO-92 (LP), 3-pin through-hole, RoHS-compliant lead finish |
Pinout & Package
LM336BZ-2.5/LFT1 is housed in a standard TO-92 plastic package (Package Number LP) with straight leads, 5.34 mm max height, and JEDEC TO-226 compliance. Pin 1 is cathode, Pin 2 is anode, Pin 3 is adjust terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Reference Output / Zener Anode | Provides 2.5V reference node; connects to load or feedback network |
| Pin 2 (Anode) | Ground / Return Path | Serves as current sink return; must be tied to system ground for proper regulation |
| Pin 3 (Adjust) | Trim Terminal | Enables external potentiometer connection to fine-tune breakdown voltage and minimize temperature drift |
Key Features
| Feature | Design Value |
|---|---|
| Low Temperature Coefficient | ≤6 mV over 0°C–70°C when trimmed to 2.490V - supports precision analog systems |
| Wide Operating Current Range | 400 μA to 10 mA - accommodates ultra-low-power sensors and high-current buffer stages |
| 0.2Ω Dynamic Impedance | Ensures <1 mV output shift per 200 μA load change - critical for high-resolution DAC/ADC references |
| Easily Trimmed Reference | Third terminal allows independent adjustment of voltage and tempco - eliminates need for matched resistor networks |
| Shunt Regulator Flexibility | Operates as positive or negative reference - simplifies design in dual-rail and inverting configurations |
Applications
| Digital Voltmeter Reference | Op-Amp Precision Biasing |
|---|---|
Use Scenario: Provides stable 2.5V reference for 16-bit ADC front-end in handheld DVMs. IC Role / Device Role / Timing Role: Shunt voltage reference establishing exact full-scale input threshold. Use Value: ±1% initial tolerance and ≤6 mV temp drift ensure measurement repeatability across lab and field environments. | Use Scenario: Sets precise common-mode voltage for rail-to-rail op-amps in sensor signal conditioning. IC Role / Device Role / Timing Role: Low-impedance DC bias source for amplifier input stage. Use Value: 0.2Ω dynamic impedance prevents gain error under varying sensor loading conditions. |
| 5V-Supply Derived Reference | Linear Regulator Feedback Node |
Use Scenario: Generates accurate 2.5V reference directly from 5V logic supply in microcontroller-based systems. IC Role / Device Role / Timing Role: Shunt regulator referenced to 5V rail, sinking excess current to maintain voltage. Use Value: Wide 400 μA–10 mA operating range allows robust operation despite supply ripple or load variation. | Use Scenario: Supplies reference voltage to error amplifier in adjustable LDO designs (e.g., LM317-based). IC Role / Device Role / Timing Role: Precision voltage setpoint for feedback loop comparison. Use Value: Trim capability enables exact 2.490V setting to match standard resistor-divider ratios and minimize tempco-induced output drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM336Z-2.5/LFT1 | Same TO-92 package, same 0°C–70°C rating, but ±2% initial tolerance (vs. ±1% for LM336BZ-2.5/LFT1) | Acceptable where cost sensitivity outweighs 12.5 mV higher worst-case error | Select when tighter initial accuracy is not required and BOM cost reduction is prioritized |
| TL431ACDBZR | Adjustable 2.495V reference, SO-8 package, 2% initial tolerance, requires two external resistors for 2.5V setup | Used in switching regulator feedback; lacks dedicated trim terminal for tempco optimization | Choose for surface-mount designs needing programmability, accepting trade-off in tempco control and external component count |
Compared with LM336Z-2.5/LFT1 and TL431ACDBZR, the LM336BZ-2.5/LFT1 delivers superior initial accuracy and integrated tempco trimming - making it optimal for fixed-precision, through-hole reference applications where layout simplicity and thermal stability are critical.
Availability
LM336BZ-2.5/LFT1 is available at Aetrix Electronics and suitable for digital instrumentation, op-amp biasing, and 5V-derived reference applications requiring stable component supply and commercial-temperature-grade performance.
Supply support for LM336BZ-2.5/LFT1 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog ICs and voltage references.
The LM336 family was designed specifically for high-stability, low-drift shunt reference applications in commercial-grade instrumentation, test equipment, and industrial control systems - emphasizing ease of trimming and robustness across supply variations.
FAQ
What is the maximum operating temperature for LM336BZ-2.5/LFT1?
The LM336BZ-2.5/LFT1 is rated for operation from 0°C to +70°C. Its junction temperature limit is 100°C, and thermal resistance θJA is 180°C/W in TO-92 package - meaning power dissipation must remain below ~389 mW to avoid exceeding this limit under worst-case ambient conditions.
Can LM336BZ-2.5/LFT1 be used as a negative voltage reference?
Yes, the LM336BZ-2.5/LFT1 can function as a negative voltage reference by reversing its connection: tie Pin 2 (anode) to the negative rail and use Pin 1 (cathode) as the −2.5V reference output. This exploits its shunt regulator topology and is explicitly supported in TI's application diagrams.
How is the adjust pin (Pin 3) used in LM336BZ-2.5/LFT1?
The adjust pin (Pin 3) on LM336BZ-2.5/LFT1 connects to a potentiometer between Pins 1 and 2, allowing independent trimming of both breakdown voltage and temperature coefficient. When adjusted to 2.490V, tempco is minimized - a feature confirmed in TI's Figure 15 and Electrical Characteristics table.
What is the dynamic impedance specification for LM336BZ-2.5/LFT1 at 1 mA?
The LM336BZ-2.5/LFT1 has a typical dynamic impedance of 0.2 Ω at 1 mA reverse current and 100 Hz, with a maximum of 0.6 Ω. This low value ensures minimal output voltage perturbation during transient load changes in precision analog circuits.
Is LM336BZ-2.5/LFT1 RoHS compliant?
Yes, LM336BZ-2.5/LFT1 is RoHS compliant, as confirmed in TI's PACKAGE OPTION ADDENDUM: "RoHS = Yes", with lead finish specified as "SN" (tin) for tape-and-reel variants like /LFT1, and MSL rating marked "N/A for Pkg Type" due to TO-92's non-moisture-sensitive construction.
LM336BZ-2.5/LFT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Box
- 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:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM336BZ-2.5/LFT1 FAQ
1.How can I place an order for LM336BZ-2.5/LFT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BZ-2.5/LFT1 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 LM336BZ-2.5/LFT1 reliable?
The price and inventory of LM336BZ-2.5/LFT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336BZ-2.5/LFT1 is usually 5 days.
3.What payment methods are accepted for LM336BZ-2.5/LFT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336BZ-2.5/LFT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336BZ-2.5/LFT1?
LM336BZ-2.5/LFT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BZ-2.5/LFT1 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 LM336BZ-2.5/LFT1?
For technical support, including LM336BZ-2.5/LFT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BZ-2.5/LFT1 requirements.
6.How does Aetrix verify that LM336BZ-2.5/LFT1 is sourced from the original manufacturer or authorized distributors?
All LM336BZ-2.5/LFT1 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 LM336BZ-2.5/LFT1 meets industry standards.
7.What is the process for return or replacement of LM336BZ-2.5/LFT1?
All LM336BZ-2.5/LFT1 units undergo pre-shipment inspection (PSI). If there is an issue with LM336BZ-2.5/LFT1, 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 LM336BZ-2.5/LFT1 part is unused and in its original packaging.
Return procedure for LM336BZ-2.5/LFT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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