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STMicroelectronics LM336ZT
- Part No.:
- LM336ZT
- Manufacturer:
- STMicroelectronics
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LM336ZT.pdf
- Description:
- IC VREF SHUNT 4.02% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,747
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Product details
Overview
LM336ZT from STMicroelectronics is a precision 2.5V shunt voltage reference IC in TO-92 package, featuring 0.2Ω dynamic impedance, ±3mV typical voltage tolerance at 1mA, 400µA–10mA operating current range, and adjustable reference voltage via third pin (ADJ). It serves as a stable, low-drift reference in analog measurement, power supply feedback, and ADC/DAC biasing circuits.
For engineers reviewing the LM336ZT datasheet, LM336ZT pinout, LM336ZT application, or LM336ZT equivalent, key selection criteria include temperature coefficient (1.8–6 mV over full range), long-term stability (20 ppm), adjustability of breakdown voltage, and compatibility with low-noise buffered reference topologies.
Technical Context
The LM336ZT operates as a two-terminal (plus ADJ) programmable shunt reference, where the ADJ pin enables fine-tuning of reverse breakdown voltage without altering temperature coefficient. Its internal bandgap-derived structure ensures stable 2.5V nominal output with minimal thermal drift.
It functions within -25°C to +85°C ambient, supports 400µA minimum operating current for regulation, and delivers sub-1Ω dynamic impedance across its rated current range-enabling high-accuracy closed-loop control in precision analog systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.49 V (typical at 1 mA, Tamb = +25°C); sets precise DC bias point for ADCs, regulators, and comparators |
| Temp Stability | 1.8–6 mV over full operating range (-25°C to +85°C); ensures <±0.24% voltage deviation across industrial temperature span |
| Dynamic Impedance | 0.2 Ω (typical at 1 mA); maintains stable output under load transients and ripple conditions |
| Operating Current | 400 µA to 10 mA; allows flexible biasing in low-power sensor interfaces and high-current regulator feedback paths |
| Long-Term Drift | 20 ppm (at +25°C ±0.1°C); guarantees <0.005% output shift per 1000 hours in stable environments |
| Adjust Pin Function | ADJ terminal enables ±50 mV trim of reference voltage; supports calibration of system offset without external op-amps |
Pinout & Package
LM336ZT is housed in a TO-92 plastic package (3-lead, bottom view), with leads designated V+, V−, and ADJ. The package meets ECOPACK® environmental compliance with lead-free second-level interconnect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Anode (cathode for Zener-mode operation) | Connected to higher potential node; reverse-biased to establish 2.5V reference drop across device |
| V− | Cathode (anode for Zener-mode operation) | Reference ground return path; forms shunt current loop with external resistor and load |
| ADJ | Adjust terminal | Enables external potentiometer-based trimming of breakdown voltage while preserving temperature coefficient |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 0.2 Ω ensures minimal output voltage perturbation during current transients in feedback loops |
| Wide operating current range | 400 µA–10 mA supports both ultra-low-power IoT sensors and high-accuracy industrial power supplies |
| Adjustable reference voltage | Third pin (ADJ) permits ±50 mV fine-tuning without requiring external op-amp circuitry |
| Guaranteed temp stability | Specified 1.8–6 mV drift over -25°C to +85°C enables use in unheated industrial enclosures |
Applications
| Precision ADC Reference | Linear Power Supply Feedback |
|---|---|
Use Scenario: High-resolution 16-bit SAR ADC requiring stable 2.5V reference input with <1 LSB error over temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing regulated excitation voltage to ADC reference input pin. Use Value: 0.2Ω dynamic impedance suppresses noise coupling from digital switching, maintaining ENOB >15.2 bits across 0–70°C. | Use Scenario: Adjustable linear regulator (e.g., LM317) with programmable output setpoint and tight line/load regulation. IC Role / Device Role / Timing Role: Precision shunt reference replacing Zener diode in feedback divider network. Use Value: Adjustable ADJ pin enables factory calibration of output voltage to ±0.1%, eliminating manual trimpot in production. |
| Current Source Biasing | Low-Noise Instrumentation Amplifier |
Use Scenario: Constant-current LED driver or photodiode transimpedance amplifier requiring stable bias current. IC Role / Device Role / Timing Role: Reference element setting current through series resistor in two-terminal shunt configuration. Use Value: 400 µA minimum operating current allows biasing from micro-power LDOs, extending battery life in portable devices. | Use Scenario: Medical-grade ECG front-end with rail-to-rail instrumentation amplifier needing ultra-stable common-mode reference. IC Role / Device Role / Timing Role: Buffered 2.5V reference source for INA's REF pin, decoupled via RC filter. Use Value: 20 ppm long-term drift prevents baseline wander >1 µV/hour, critical for multi-hour patient monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACZ | 2.5V reference with 2.5% initial tolerance (vs. LM336ZT's ±0.4%), higher 0.22Ω dynamic impedance, no ADJ pin | Fixed-reference-only designs; lacks voltage trim capability for calibration-critical systems | Select when cost sensitivity outweighs need for post-manufacture adjustment |
| REF200AUE4 | 2.5V reference with 0.1% initial accuracy, 10 ppm/°C tempco, but requires ≥1mA min current and no ADJ pin | High-accuracy metrology applications; not suitable for low-current (<400µA) or field-calibratable designs | Select when absolute initial accuracy > trim flexibility; verify supply headroom for 1.8V dropout |
Compared with TL431ACZ and REF200AUE4, the LM336ZT uniquely balances adjustability, low-current operation, and industrial temperature range-making it optimal for field-serviceable analog subsystems where calibration and thermal robustness are co-priorities.
Availability
LM336ZT is available at Aetrix Electronics and suitable for precision ADC reference, linear power supply feedback, and current source biasing requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for LM336ZT 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.
The LM336ZT belongs to ST's precision voltage reference product line, engineered specifically for applications demanding stable, adjustable, low-impedance shunt references in cost-sensitive industrial systems.
FAQ
What is the minimum operating current required for LM336ZT to regulate at 2.5V?
The LM336ZT requires a minimum cathode current of 400 µA to maintain regulation at 2.5V. Below this threshold, the device enters non-regulated region and output voltage drops nonlinearly. This value is verified per Table 2 in the official ST datasheet (Rev 3, May 2007), and applies across the full -25°C to +85°C operating range.
Can the ADJ pin be left unconnected in standard 2.5V operation?
Yes-the ADJ pin may be left open or tied directly to V− for fixed 2.5V operation. ST's datasheet Figure 11 shows this configuration explicitly. Leaving ADJ floating does not affect regulation stability or temperature coefficient, as the internal reference core remains fully functional without external adjustment.
How does LM336ZT compare to LM336BZT in terms of temperature range and accuracy?
The LM336ZT is rated for -25°C to +85°C operation with 2.49V typical reference voltage and ±3mV max deviation; the LM336BZT is limited to 0°C to +70°C and has looser 2.39–2.49V min/max spec. Both share identical pinout and dynamic impedance, but LM336ZT supports broader industrial ambient conditions.
Is LM336ZT RoHS-compliant and lead-free?
Yes-LM336ZT is supplied in ST's ECOPACK®-compliant TO-92 package with lead-free second-level interconnect, as confirmed in Section 5 ("Package information") of the official datasheet. The inner box label and package marking indicate lead-free status per JEDEC JESD97, and it meets EU RoHS Directive 2011/65/EU requirements.
LM336ZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.49V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±4.02%
- 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
LM336ZT FAQ
1.How can I place an order for LM336ZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336ZT 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 LM336ZT reliable?
The price and inventory of LM336ZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336ZT is usually 5 days.
3.What payment methods are accepted for LM336ZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336ZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336ZT?
LM336ZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336ZT 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 LM336ZT?
For technical support, including LM336ZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336ZT requirements.
6.How does Aetrix verify that LM336ZT is sourced from the original manufacturer or authorized distributors?
All LM336ZT 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 LM336ZT meets industry standards.
7.What is the process for return or replacement of LM336ZT?
All LM336ZT units undergo pre-shipment inspection (PSI). If there is an issue with LM336ZT, 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 LM336ZT part is unused and in its original packaging.
Return procedure for LM336ZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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