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Texas Instruments LM336BZ-2.5/LFT7
- Part No.:
- LM336BZ-2.5/LFT7
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM336BZ-2.5/LFT7.pdf
- Description:
- IC VREF SHUNT 2% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,826
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Product details
Overview
LM336BZ-2.5/LFT7 from Texas Instruments is a precision 2.5V shunt voltage reference 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/LFT7 datasheet, LM336BZ-2.5/LFT7 pinout, LM336BZ-2.5/LFT7 application, or LM336BZ-2.5/LFT7 equivalent, key selection considerations include its TO-92 thermal resistance (θJA = 180°C/W), trimmable temperature coefficient, low-temperature-coefficient zener architecture, and compatibility with standard 5V logic rails.
Technical Context
The LM336BZ-2.5/LFT7 operates as a monolithic shunt regulator diode, functioning like a precision 2.5V zener with active temperature compensation circuitry. Its third terminal enables external trimming of both reference voltage and temperature coefficient-unlike basic zeners-allowing optimization for minimum drift across its 0°C to +70°C range.
It exhibits 2.490V typical reverse breakdown at 1 mA, with ≤6 mV change over 400 μA–10 mA current variation and ≤6 mV temperature stability across its full operating range. The device uses internal bandgap-derived biasing to achieve low dynamic impedance (0.2Ω typ) without requiring series pass transistors or external compensation networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.490 V (typical at 1 mA); stable output for precision analog sensing and ADC reference |
| Initial Tolerance | ±1% (ensures ≤25 mV absolute error at 2.5V without calibration) |
| Operating Current | 400 μA to 10 mA (supports low-power sensor nodes and high-current buffer stages) |
| Dynamic Impedance | 0.2 Ω (typical); minimizes load-induced voltage shift in varying-current applications) |
| Temp Stability | ≤6 mV (0°C to +70°C); enables <±25 ppm/°C drift performance in unheated environments) |
| Temp Coefficient | Trim-adjustable; achieves near-zero drift when set to 2.490V per Figure 15 |
| Package | TO-92 (LP); industry-standard through-hole package with 180°C/W junction-to-ambient thermal resistance |
Pinout & Package
LM336BZ-2.5/LFT7 is housed in a 3-pin TO-92 plastic package (JEDEC TO-226, Package Number LP), with leads formed for tape-and-reel automated assembly. Thermal resistance is 180°C/W (0.4″ leads) and storage temperature range is −60°C to +150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current sink terminal | Connects to ground or low-impedance return path; sets cathode voltage relative to this node |
| Cathode (Pin 2) | Reference output node | Delivers regulated 2.5V when reverse-biased; connects to load and bias resistor |
| Adjust (Pin 3) | Trim control terminal | Enables external potentiometer connection to fine-tune voltage and minimize temperature drift |
Key Features
| Feature | Design Value |
|---|---|
| Trim-adjustable reference | Third terminal allows simultaneous optimization of output voltage and temperature coefficient |
| Low dynamic impedance | 0.2Ω typical ensures minimal output variation under load transients or current changes |
| Wide operating current | 400 μA–10 mA range supports ultra-low-power IoT sensors and high-drive buffer circuits |
| Precision 2.5V output | 2.490V typical at 1 mA enables accurate scaling for 10-bit+ ADCs and DACs |
| Stable over commercial temp | Specified for 0°C to +70°C-matches industrial control and consumer electronics ambient ranges |
Applications
| Digital Voltmeter Reference | Op-Amp Precision Biasing |
|---|---|
Use Scenario: High-resolution handheld DVM measuring 0–20V range with 12-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for ADC internal scaling and front-end signal conditioning. Use Value: ±1% initial tolerance and ≤6 mV temp drift ensure <0.1% full-scale measurement error without recalibration. | Use Scenario: Rail-to-rail op-amp used in thermocouple amplifier with cold-junction compensation. IC Role / Device Role / Timing Role: Supplies precise 2.5V common-mode bias to maintain linear input range across temperature. Use Value: 0.2Ω dynamic impedance prevents bias shift during fast-slewing output transitions. |
| 5V-Supply Derived Reference | Shunt Regulator for Low-Power MCU |
Use Scenario: Microcontroller-based data logger powered from USB 5V, requiring clean 2.5V ADC reference. IC Role / Device Role / Timing Role: Shunt-connected between 5V rail and ground, sinking excess current to regulate 2.5V node. Use Value: Wide 400 μA–10 mA operating range accommodates varying MCU sleep/active current without redesign. | Use Scenario: Battery-powered environmental sensor node using MSP430 with integrated 10-bit ADC. IC Role / Device Role / Timing Role: Serves as ultra-low-quiescent shunt reference, drawing only 400 μA in standby mode. Use Value: Enables >5-year battery life while maintaining ADC accuracy within ±0.5 LSB over temperature. |
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/LFT7 | Same TO-92 package, but ±2% initial tolerance and higher temp drift (≤12 mV over 0°C–70°C) | Suitable for cost-sensitive, non-precision applications where calibration is performed in-system | Select LM336Z-2.5/LFT7 only if budget constraints outweigh need for factory-trimmed accuracy |
| TL431ACDBVR | Adjustable 2.495V reference in SOT-23; requires two external resistors; 0.2% initial tolerance; 0.22Ω dynamic impedance | Better suited for PCB space-constrained designs and adjustable-output configurations | Choose TL431ACDBVR when footprint reduction or programmable reference voltage is required |
Compared with LM336Z-2.5/LFT7, the LM336BZ-2.5/LFT7 delivers tighter initial tolerance and lower temperature drift-critical for uncalibrated systems-while TL431ACDBVR offers superior accuracy and smaller size but demands external components and layout care for noise immunity.
Availability
LM336BZ-2.5/LFT7 is available at Aetrix Electronics and suitable for digital instrumentation, precision analog signal chains, and low-power embedded reference applications requiring stable component supply across production lifecycles.
Supply support for LM336BZ-2.5/LFT7 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, delivering analog and embedded processing solutions since 1930.
The LM336 series belongs to TI's precision voltage reference product line, engineered specifically for applications demanding stable, low-drift, shunt-based references in cost-sensitive, space-constrained, or temperature-variable environments.
FAQ
What is the maximum reverse current rating for LM336BZ-2.5/LFT7?
The absolute maximum reverse current for LM336BZ-2.5/LFT7 is 15 mA, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage. For reliable long-term use, TI recommends staying within the 400 μA to 10 mA operating current range, where electrical characteristics-including 2.490V typical breakdown and 0.2Ω dynamic impedance-are fully guaranteed.
Can LM336BZ-2.5/LFT7 be used as a negative voltage reference?
Yes, LM336BZ-2.5/LFT7 can function as a negative voltage reference by reversing its polarity: connect the cathode to system ground and the anode to a negative rail, with the adjust pin configured accordingly. This configuration leverages its shunt regulator architecture to establish a stable −2.5V reference relative to ground, as confirmed in the device description and Figure 23 (Bipolar Output Reference) of the SNVS749F datasheet.
Does LM336BZ-2.5/LFT7 require external capacitors for stability?
No, LM336BZ-2.5/LFT7 does not require external capacitors for basic DC stability, as it is internally compensated and exhibits fast turn-on behavior. However, a 1 μF ceramic capacitor placed directly at the cathode-to-ground node is recommended in noisy environments or when driving capacitive loads >100 pF to suppress high-frequency oscillation and improve transient response, per Application Hints section and Figure 26 (Low Noise Buffered Reference).
What is the part marking on LM336BZ-2.5/LFT7 devices?
The laser-marked top-side identifier on LM336BZ-2.5/LFT7 is "LM336 BZ2.5", as documented in TI's PACKAGE OPTION ADDENDUM. This marking appears on the TO-92 package body and is consistent across all LFT7 tape-and-reel shipments. No date code, lot trace, or environmental suffix is included in the primary marking.
How does the adjust pin (Pin 3) affect temperature coefficient in LM336BZ-2.5/LFT7?
The adjust pin (Pin 3) of LM336BZ-2.5/LFT7 enables direct control of both output voltage and temperature coefficient. When trimmed to exactly 2.490V using the circuit in Figure 15 (with two series silicon diodes), the device achieves minimum temperature drift-typically <±10 ppm/°C-by balancing internal thermal gradients. Deviation from 2.490V increases drift proportionally, as confirmed in the Temperature Stability specification and APPLICATION HINTS section.
LM336BZ-2.5/LFT7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- 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:
- ±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/LFT7 FAQ
1.How can I place an order for LM336BZ-2.5/LFT7 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BZ-2.5/LFT7 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/LFT7 reliable?
The price and inventory of LM336BZ-2.5/LFT7 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/LFT7 is usually 5 days.
3.What payment methods are accepted for LM336BZ-2.5/LFT7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336BZ-2.5/LFT7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336BZ-2.5/LFT7?
LM336BZ-2.5/LFT7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BZ-2.5/LFT7 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/LFT7?
For technical support, including LM336BZ-2.5/LFT7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BZ-2.5/LFT7 requirements.
6.How does Aetrix verify that LM336BZ-2.5/LFT7 is sourced from the original manufacturer or authorized distributors?
All LM336BZ-2.5/LFT7 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/LFT7 meets industry standards.
7.What is the process for return or replacement of LM336BZ-2.5/LFT7?
All LM336BZ-2.5/LFT7 units undergo pre-shipment inspection (PSI). If there is an issue with LM336BZ-2.5/LFT7, 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/LFT7 part is unused and in its original packaging.
Return procedure for LM336BZ-2.5/LFT7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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