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Texas Instruments LM4050BIM3X-5.0
- Part No.:
- LM4050BIM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BIM3X-5.0.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,537
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Product details
Overview
LM4050BIM3X-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.2% initial tolerance (B-grade), 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 56 μA to 15 mA and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges. It is used in high-accuracy ADC/DAC biasing and portable instrumentation power rails.
For engineers reviewing the LM4050BIM3X-5.0 datasheet, LM4050BIM3X-5.0 pinout, LM4050BIM3X-5.0 application, or LM4050BIM3X-5.0 equivalent, key selection criteria include output voltage tolerance at 25°C and over temperature, minimum operating current, dynamic impedance, long-term stability (120 ppm), and thermal hysteresis (1.4 mV).
Technical Context
The LM4050BIM3X-5.0 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its two-terminal configuration requires no output capacitor and tolerates any capacitive load, eliminating external stabilization components.
It achieves ±0.2% initial accuracy via wafer-level fuse and Zener-zap trimming, and maintains stability across 56 μA–15 mA operating current and −40°C to +125°C junction temperature. Dynamic impedance remains ≤0.5 Ω at 1 mA, enabling low-noise, high-PSRR reference performance in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, specified at 100 μA test current |
| Initial Tolerance | ±0.2% at 25°C (B-grade), enabling high-accuracy system calibration without trimming |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +125°C, minimizing drift-induced measurement error |
| Min Operating Current | 56 μA at 25°C, supporting ultra-low-power battery operation |
| Dynamic Impedance | 0.5 Ω at 1 mA, ensuring stable regulation under varying load transients |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz), suitable for 16-bit+ data acquisition systems |
| Long-Term Stability | 120 ppm after 1000 hours, reducing recalibration frequency in field-deployed equipment |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178 compatible. Anode connected to ground; cathode supplies reference current path; pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to regulated supply rail; sinks current to maintain 5.0 V across external resistor |
| Anode (Pin 2) | Common return / ground reference | Must be tied to system ground; defines 0 V reference for cathode voltage |
| NC (Pin 3) | No internal connection | Must remain unconnected; floating or grounded-no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load eliminates BOM cost and layout area for stabilization cap |
| Fixed 5.0 V breakdown | Eliminates external resistor network; simplifies design for standard 5 V reference applications |
| Low 56 μA min current | Enables use in always-on sensor nodes and energy-harvesting systems with microamp supply budgets |
| Industrial & extended temp range | Validated operation from −40°C to +125°C supports automotive under-hood and industrial control environments |
| Low thermal hysteresis | 1.4 mV hysteresis over −40°C ↔ +125°C cycling ensures repeatable voltage after thermal stress |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 24-bit sigma-delta ADC requiring stable excitation and reference. IC Role / Device Role / Timing Role: Shunt reference providing precise 5.0 V bias for ADC reference input and sensor excitation circuitry. Use Value: ±0.2% initial tolerance and 50 ppm/°C TC ensure <0.01% full-scale error over temperature without calibration. |
Use Scenario: Modular DAQ module in factory automation PLC rack with isolated analog inputs. IC Role / Device Role / Timing Role: Local 5.0 V reference for 16-bit SAR ADC front-end, decoupled from noisy system rails. Use Value: 0.5 Ω dynamic impedance and 93 μVrms noise preserve ENOB >15.5 bits in 100 kSPS sampling. |
| Energy Management Units | Precision Audio Components |
Use Scenario: Smart electricity meter with metrology ASIC measuring voltage/current harmonics. IC Role / Device Role / Timing Role: Primary shunt reference for anti-aliasing filter biasing and ADC reference in Class 0.2 metering path. Use Value: 120 ppm long-term stability reduces annual recalibration need; 56 μA min current extends battery life in backup mode. |
Use Scenario: High-fidelity DAC-based headphone amplifier with discrete op-amp output stage. IC Role / Device Role / Timing Role: Low-noise 5.0 V reference for DAC internal bias generation and analog output stage offset nulling. Use Value: 93 μVrms noise floor avoids audible hiss; thermal hysteresis <1.4 mV prevents DC offset shift during thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040BIM3X-5.0 | Higher 100 μA min operating current; 100 ppm/°C max TC; same SOT-23 package | Less suitable for sub-100 μA battery-powered systems; higher drift limits high-precision metrology | Select LM4050BIM3X-5.0 when lower quiescent current or tighter TC is required |
| REF3050AIDBZR | Series topology; 50 μA typical quiescent current; 50 ppm/°C TC; requires output capacitor | Needs external 1 μF ceramic cap; not drop-in; higher board area but better PSRR | Choose REF3050AIDBZR only if series topology benefits (e.g., input-to-output isolation) outweigh added component count |
Compared with LM4040BIM3X-5.0, LM4050BIM3X-5.0 delivers 44% lower minimum current and half the temperature coefficient; versus REF3050AIDBZR, it eliminates the output capacitor requirement but lacks input-to-output isolation and has slightly higher noise.
Availability
LM4050BIM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, energy management units, and precision audio components requiring stable component supply across industrial and extended temperature grades.
Supply support for LM4050BIM3X-5.0 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 digital signal solutions, with decades of leadership in precision reference technology.
The LM4050-N family was designed for space-constrained, high-accuracy applications demanding micropower operation, zero external components, and robust thermal performance - targeting portable test equipment, industrial sensors, and automotive subsystems.
FAQ
What is the minimum operating current for LM4050BIM3X-5.0 at 25°C?
The LM4050BIM3X-5.0 requires a minimum operating current of 56 μA at 25°C to maintain regulation within specification. This value increases to 80 μA over the industrial temperature range (−40°C to +85°C) and 90 μA over the extended range (−40°C to +125°C), as confirmed in Section 6.8 of the TI SNOS455G datasheet. Operation below this current risks loss of voltage accuracy.
Does LM4050BIM3X-5.0 require an external output capacitor?
No, LM4050BIM3X-5.0 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or large bypass caps. This eliminates BOM cost and layout area - a key differentiator from most series references like REF3050AIDBZR, which mandate ≥1 μF ceramic output capacitance.
What is the temperature coefficient specification for LM4050BIM3X-5.0?
The LM4050BIM3X-5.0 has a maximum average temperature coefficient of 50 ppm/°C over the full operating range (−40°C to +125°C), as specified in Section 6.8 of the datasheet. At 25°C, the typical TC is ±20 ppm/°C. This tight drift budget enables high-accuracy measurements in uncontrolled thermal environments without software compensation.
How does the pinout of LM4050BIM3X-5.0 differ from standard Zener diodes?
LM4050BIM3X-5.0 uses a 3-pin SOT-23 (DBZ) package with Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3). Unlike discrete Zeners, Pin 3 is unconnected - it must remain floating or grounded per TI guidance. The Anode serves as the ground reference node, while the Cathode is the active voltage node, requiring proper current-limiting resistor placement on the cathode side.
Is LM4050BIM3X-5.0 qualified for automotive applications?
No, LM4050BIM3X-5.0 is not automotive-qualified. It belongs to the LM4050-N industrial-grade family. For automotive use, TI offers the LM4050-N-Q1 variant (e.g., LM4050BIM3X-5.0-Q1), which is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on an automotive-grade flow. The standard LM4050BIM3X-5.0 lacks automotive qualification documentation and process controls.
LM4050BIM3X-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BIM3X-5.0 FAQ
1.How can I place an order for LM4050BIM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIM3X-5.0 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 LM4050BIM3X-5.0 reliable?
The price and inventory of LM4050BIM3X-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4050BIM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIM3X-5.0?
LM4050BIM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIM3X-5.0 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 LM4050BIM3X-5.0?
For technical support, including LM4050BIM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIM3X-5.0 requirements.
6.How does Aetrix verify that LM4050BIM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4050BIM3X-5.0 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 LM4050BIM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4050BIM3X-5.0?
All LM4050BIM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIM3X-5.0, 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 LM4050BIM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4050BIM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BIM3X-5.0 Tags
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