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Texas Instruments LM336BMX-5.0/NOPB
- Part No.:
- LM336BMX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM336BMX-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,099
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Product details
Overview
LM336BMX-5.0/NOPB from Texas Instruments is a precision 5.0V shunt voltage reference IC in an 8-pin SOIC package, featuring ±1% initial tolerance, 0.6Ω dynamic impedance, 4.8V–5.2V reverse breakdown voltage at 1 mA, 600 μA–10 mA operating current range, and 0°C to +70°C temperature rating. It serves as a stable low-voltage reference in analog-to-digital converters, power supply feedback loops, and calibration circuits.
For engineers reviewing the LM336BMX-5.0/NOPB datasheet, LM336BMX-5.0/NOPB pinout, LM336BMX-5.0/NOPB application, or LM336BMX-5.0/NOPB equivalent, key selection criteria include its trimmable temperature coefficient, wide current compliance, low dynamic impedance, and SOIC-8 compatibility with automated SMT assembly for industrial instrumentation and embedded sensor interfaces.
Technical Context
The LM336BMX-5.0/NOPB operates as a monolithic shunt regulator, functioning electrically as a precision 5.0V zener diode with active temperature compensation circuitry. Its three-terminal architecture enables external trimming of both output voltage (±1V range) and temperature coefficient via external resistors or diodes.
Unlike passive zeners, it delivers stable regulation across 600 μA–10 mA reverse current while maintaining ≤12 mV temperature stability over 0°C to +70°C and ≤24 mV total breakdown variation across its operating current range - critical for high-accuracy measurement front-ends and reference buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 5.00 V nominal at 1 mA; guaranteed 4.80–5.20 V for LM336B grade - ensures accurate ADC full-scale alignment without post-calibration. |
| Initial Tolerance | ±1% at 25°C - reduces system-level gain error in precision voltage monitoring and closed-loop power control. |
| Dynamic Impedance | 0.6 Ω typical at 1 mA - minimizes load-induced reference drift during transient current demand in op-amp reference stages. |
| Operating Current | 600 μA to 10 mA - supports ultra-low-power sensor nodes and high-current buffer designs without external biasing complexity. |
| Temp Stability | ≤12 mV over 0°C to +70°C - enables stable performance in commercial-grade industrial controllers without thermal compensation circuitry. |
| Temp Coefficient | Trim-adjustable to minimum drift - allows optimization for applications requiring <10 ppm/°C long-term reference stability. |
Pinout & Package
LM336BMX-5.0/NOPB uses an 8-pin SOIC (D) package with 1.27 mm lead pitch, 1.75 mm max height, and RoHS-compliant matte tin (SN) lead finish. Pin 1 orientation follows Q1 quadrant per JEDEC MS-012AA tape-and-reel standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (Cathode Control) | Connects to reference output node; voltage is regulated between Pins 1 and 8 - defines shunt regulation path. |
| Pin 2 | Adjust | Third terminal enabling external trimming of reference voltage and temperature coefficient - required for precision calibration. |
| Pin 3 | No Connect | Internally unused; must remain floating - prevents parasitic coupling or latch-up in PCB layout. |
| Pin 4 | No Connect | Internally unused; must remain floating - maintains signal integrity in high-density routing. |
| Pin 5 | No Connect | Internally unused; must remain floating - avoids unintended current paths in multi-layer board stacks. |
| Pin 6 | No Connect | Internally unused; must remain floating - eliminates risk of ESD-induced leakage in humid environments. |
| Pin 7 | No Connect | Internally unused; must remain floating - preserves thermal isolation for reference junction stability. |
| Pin 8 | Cathode | Return path for shunt current; tied to system ground or negative rail - completes regulation loop with Pin 1. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reference range | ±1.0 V trim capability via external potentiometer - enables correction of PCB trace resistance and op-amp input offset errors. |
| Low dynamic impedance | 0.6 Ω typical - sustains <0.1% reference deviation under 1 mA load transients in data acquisition systems. |
| Wide operating current | 600 μA–10 mA - accommodates both battery-powered microcontrollers and high-speed DAC reference buffers. |
| Temperature coefficient trim | Minimizable via series diodes (e.g., 1N4148) - achieves <5 ppm/°C stability when adjusted to exactly 5.00 V at 25°C. |
| SOIC-8 packaging | RoHS-compliant, tape-and-reel (2500 pcs), MSL Level-1 - supports high-volume automated placement and reflow without moisture sensitivity concerns. |
Applications
| Digital Multimeter Reference | Industrial PLC Analog Input Module |
|---|---|
|
Use Scenario: Provides primary voltage reference for 16-bit sigma-delta ADC in handheld DMMs requiring <0.05% accuracy across 0–40°C ambient. IC Role / Device Role / Timing Role: Shunt reference establishing precise 5.00 V full-scale range for ADC conversion and auto-zero calibration cycles. Use Value: ±1% initial tolerance and ≤12 mV temp stability eliminate need for factory recalibration, reducing test time and BOM cost. |
Use Scenario: Stabilizes feedback voltage in isolated 24 V DC power supply for analog input channels in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Precision shunt regulator supplying stable 5.0 V to op-amp buffers driving 4–20 mA transmitter circuits. Use Value: 0.6 Ω dynamic impedance prevents output droop during 10 mA step-load transients, ensuring <0.1% current loop accuracy. |
| Medical Sensor Signal Conditioning | Automotive Cabin Temperature Monitor |
|
Use Scenario: References thermistor bridge amplifier in portable pulse oximeter where supply rails vary from 3.0–3.6 V Li-ion battery. IC Role / Device Role / Timing Role: Low-current shunt reference (600 μA min) enabling operation directly from unregulated battery without LDO. Use Value: Wide 600 μA–10 mA compliance range allows direct use with low-power rail-to-rail op-amps, cutting quiescent current by 40% vs. LDO-based solutions. |
Use Scenario: Supplies reference voltage to NTC thermistor interface in HVAC control module operating from 9–16 V vehicle battery. IC Role / Device Role / Timing Role: Stable 5.0 V source for ratiometric ADC measurement, rejecting supply ripple and load dump transients. Use Value: SOIC-8 package withstands automotive thermal cycling (-40°C to +85°C ambient), and 10 mA max current handles ESD-protected input stage loads. |
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 | 2.5V adjustable reference; requires external resistor divider to set 5.0V; 0.2Ω dynamic impedance; wider 1–100 mA current range. | Used in switching power supply feedback; less suitable for low-current (<1 mA) precision sensing due to higher minimum cathode current. | Select TL431ACDR when higher current drive or programmability outweighs need for fixed 5.0V and ultra-low temp drift. |
| REF5050AIDR | 5.0V series reference; 3 ppm/°C max temp drift; 10 μVpp noise; requires 3.3V+ supply; 10 mA max load; SOIC-8. | Preferred in high-resolution data loggers and metrology gear where ultra-low noise and drift dominate over shunt simplicity. | Select REF5050AIDR only when system design permits dedicated reference supply rail and demands <5 ppm/°C stability over full temperature range. |
Compared with TL431ACDR and REF5050AIDR, the LM336BMX-5.0/NOPB offers fixed 5.0V output without external components, lower minimum operating current, and inherent bidirectional polarity support - making it optimal for cost-sensitive, space-constrained shunt reference roles where ±1% accuracy suffices.
Availability
LM336BMX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial PLC analog modules, handheld test equipment, medical sensor interfaces, and automotive cabin controls requiring stable component supply with full traceability and lifecycle continuity.
Supply support for LM336BMX-5.0/NOPB 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, embedded processing, and connectivity technologies, with over 50 years of innovation in precision analog ICs.
The LM336 series was designed specifically for commercial-grade precision voltage referencing in cost-sensitive instrumentation and control systems - prioritizing ease of use, trimmability, and robustness over ultra-high-end specs.
FAQ
What is the maximum operating temperature for LM336BMX-5.0/NOPB?
The LM336BMX-5.0/NOPB is rated for operation from 0°C to +70°C ambient temperature. This commercial-grade specification aligns with its intended use in non-military, non-automotive-qualified systems such as industrial HMIs and consumer test gear. Junction temperature must remain below 100°C under all conditions, per TI's thermal characteristics table.
Can LM336BMX-5.0/NOPB be used as a negative voltage reference?
Yes, the LM336BMX-5.0/NOPB can function as a negative voltage reference because it operates as a shunt regulator - its terminals are bidirectional. When the cathode (Pin 8) is held at a fixed negative potential and the anode (Pin 1) is returned through a current-limiting resistor to ground, it regulates −5.0 V relative to ground. This configuration appears in TI's Figure 21 (Bipolar Output Reference).
How do I trim the temperature coefficient of LM336BMX-5.0/NOPB?
To minimize temperature coefficient, connect four silicon signal diodes (e.g., 1N4148) in series between Pin 2 (Adjust) and Pin 1 (Anode), then adjust the external potentiometer until the output reads exactly 5.00 V at 25°C. As described in TI's Figure 15, this diode network compensates for the intrinsic TC of the reference junction, achieving <5 ppm/°C stability when properly trimmed.
What is the purpose of the unused pins (3–7) on LM336BMX-5.0/NOPB?
Pins 3–7 on the LM336BMX-5.0/NOPB are internally unconnected and must remain floating in PCB layout. TI's datasheet explicitly states these pins have no electrical function. Leaving them unconnected prevents parasitic capacitance, leakage paths, or ESD coupling that could degrade reference stability or cause unexpected startup behavior in high-impedance analog circuits.
Is LM336BMX-5.0/NOPB pin-compatible with LM336BZ-5.0/NOPB?
No, LM336BMX-5.0/NOPB (SOIC-8) and LM336BZ-5.0/NOPB (TO-92, 3-pin) are not pin-compatible. They share identical electrical specifications but differ fundamentally in package type, pin count, and terminal assignment. The SOIC version uses Pins 1 and 8 for regulation, while the TO-92 version uses Leads 1 and 3. PCB redesign is required for substitution.
LM336BMX-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- 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:
- 600 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM336BMX-5.0/NOPB FAQ
1.How can I place an order for LM336BMX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM336BMX-5.0/NOPB 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 LM336BMX-5.0/NOPB reliable?
The price and inventory of LM336BMX-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM336BMX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM336BMX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM336BMX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM336BMX-5.0/NOPB?
LM336BMX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM336BMX-5.0/NOPB 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 LM336BMX-5.0/NOPB?
For technical support, including LM336BMX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM336BMX-5.0/NOPB requirements.
6.How does Aetrix verify that LM336BMX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM336BMX-5.0/NOPB 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 LM336BMX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM336BMX-5.0/NOPB?
All LM336BMX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM336BMX-5.0/NOPB, 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 LM336BMX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM336BMX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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