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Texas Instruments LM4050BEM3X-5.0
- Part No.:
- LM4050BEM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3X-5.0.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,301
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Product details
Overview
LM4050BEM3X-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 ±10 mV (±0.2%) initial tolerance at 25°C, 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 - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050BEM3X-5.0 datasheet, LM4050BEM3X-5.0 pinout, LM4050BEM3X-5.0 application, or LM4050BEM3X-5.0 equivalent, this page provides verified electrical specs, thermal behavior, load regulation performance, stability under capacitive loads, and validated alternative options for space-constrained, low-power analog systems.
Technical Context
The LM4050BEM3X-5.0 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling ±50 ppm/°C max TC over −40°C to +125°C. Its dynamic impedance remains ≤0.5 Ω at 1 mA (120 Hz), ensuring minimal output variation across 1 mA–15 mA load current changes.
No external capacitor is required for stability, and it tolerates unlimited capacitive loading - a key differentiator from series references. The device achieves 120 ppm long-term stability after 1000 hours at 25°C and exhibits 1.4 mV thermal hysteresis across −40°C ↔ +125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage at 100 μA test current |
| Initial Tolerance | ±10 mV (±0.2%) at 25°C - B-grade accuracy per LM4050-N family |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to +125°C - enables <±3.25 mV drift in full range |
| Operating Current | 56 μA min to 15 mA max - supports ultra-low-power sensor nodes and high-current DAC references |
| Dynamic Impedance | 0.5 Ω typical at 1 mA, 120 Hz - ensures <0.75 mV output shift for 1.5 mA load step |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - suitable for 16-bit+ data acquisition without added filtering |
| Long-Term Stability | 120 ppm after 1000 hrs - predictable aging for calibration-critical systems |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178AC compliant. Pin 1 = Cathode (shunt current input), Pin 2 = Anode (ground reference), Pin 3 = NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated supply rail; sinks all current not drawn by load - sets reference voltage via IR drop across external resistor |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for cathode voltage - no floating or series resistance allowed |
| NC (Pin 3) | No internal connection | Left unconnected per TI specification; no routing, stitching, or thermal pad tie required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - eliminates BOM cost and board area for decoupling |
| Tolerates capacitive loads | Unlimited capacitive loading on cathode - enables direct buffering of ADC reference inputs without phase-margin risk |
| Fuse/Zener-zap voltage trim | Wafer-sort trimming ensures ±0.2% initial accuracy without post-package calibration |
| Low quiescent current | 56 μA minimum operating current - extends battery life in always-on sensor transmitters |
| Industrial & extended temp support | Specified from −40°C to +125°C - qualified for automotive under-hood and industrial motor control environments |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
|
Use Scenario: Handheld multimeter with 24-bit sigma-delta ADC requiring stable 5 V reference. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise 5.0 V基准 for ADC internal gain stage and external sensor excitation. Use Value: ±10 mV initial tolerance and 50 ppm/°C TC ensure <±0.02% full-scale error contribution across operating temperature. |
Use Scenario: Isolated industrial DAQ module measuring thermocouple and RTD signals. IC Role / Device Role / Timing Role: Primary reference for both 16-bit SAR ADC and 12-bit DAC in analog front-end. Use Value: 93 μVrms noise and 0.5 Ω dynamic impedance prevent SNR degradation and maintain monotonicity during fast load transients. |
| Energy Management Units | Precision Audio Components |
|
Use Scenario: Smart circuit breaker monitoring voltage/current with energy metering IC. IC Role / Device Role / Timing Role: Reference for metrology-grade ADC sampling AC mains at 2 kSPS. Use Value: 120 ppm long-term stability ensures calibration validity over 5-year field deployment without recalibration. |
Use Scenario: High-fidelity audio DAC PCB with discrete op-amp output stage. IC Role / Device Role / Timing Role: Low-noise 5 V reference for DAC's internal voltage-controlled oscillator and analog output buffer bias. Use Value: Capacitive-load tolerance allows direct connection to 100 nF bypass cap on DAC AVDD rail - no series resistor needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B50IDBZR | Same 5.0 V, ±0.2% (B-grade), SOT-23, but higher 100 μA min operating current and 120 μVrms noise | Less suitable for sub-100 μA battery-powered nodes; acceptable where noise margin >27 μVrms | Select when TI second-source assurance is required and higher min current is acceptable |
| ADR3450ARJZ-R7 | Series reference (not shunt); 5.0 V, ±0.1% (A-grade), 35 ppm/°C TC, but requires ≥100 μA supply current and external bypass cap | Cannot replace shunt topology directly; needs redesign of bias network and layout | Choose only if system already uses series references and board space allows added capacitor |
Compared with TL4050B50IDBZR and ADR3450ARJZ-R7, the LM4050BEM3X-5.0 uniquely combines ultra-low minimum current (56 μA), zero-capacitor stability, and shunt topology - making it irreplaceable in existing SOT-23 shunt reference layouts where power budget and board area are constrained.
Availability
LM4050BEM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management units requiring stable component supply with guaranteed long-term sourcing and consistent parametric performance.
Supply support for LM4050BEM3X-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 and embedded processing technologies, with decades of expertise in precision reference design and high-reliability manufacturing.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - emphasizing low drift, low noise, and robust capacitive-load stability.
FAQ
What is the minimum operating current for LM4050BEM3X-5.0?
The LM4050BEM3X-5.0 has a minimum operating current of 56 μA at 25°C and up to 90 μA across the extended temperature range (−40°C to +125°C). This value is specified in Section 6.8 of the SNOS455G datasheet under "Minimum Operating Current" for the 5-V option and B-grade variant. Operation below 56 μA may result in loss of regulation or increased output impedance.
Does LM4050BEM3X-5.0 require an output capacitor?
No, the LM4050BEM3X-5.0 does not require an output capacitor for stability - a core feature confirmed in the "Features" section and "Functional Description" of the datasheet. Its internal design ensures unconditional stability even with unlimited capacitive loading on the cathode, eliminating the need for external bypass components in most applications.
What is the thermal hysteresis specification for LM4050BEM3X-5.0?
The LM4050BEM3X-5.0 exhibits 1.4 mV thermal hysteresis over the −40°C to +125°C cycle, as specified in Table 6.8 (Electrical Characteristics: 5-V Option) of the SNOS455G datasheet. This represents the voltage difference measured at 25°C after thermal cycling to both extremes, critical for repeatable calibration in field-deployed equipment.
Is LM4050BEM3X-5.0 qualified for automotive applications?
The LM4050BEM3X-5.0 is not AEC-Q100 qualified; only the LM4050-N-Q1 variants (e.g., LM4050BEM3X-5.0-Q1) carry Grade 1 qualification. This part is rated for industrial and extended temperature ranges (−40°C to +125°C) but lacks automotive-specific stress testing, failure-in-time (FIT) reporting, and PPAP documentation required for automotive ECUs.
What package type and pin configuration does LM4050BEM3X-5.0 use?
The LM4050BEM3X-5.0 uses the SOT-23 (DBZ) package with three terminals: Pin 1 = Cathode, Pin 2 = Anode (ground), Pin 3 = NC (no internal connection). This matches the pinout shown in Figure 5 ("Pin Configuration and Functions") of the SNOS455G datasheet and is mechanically identical to standard JEDEC MO-178AC SOT-23 footprints.
LM4050BEM3X-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:
- 90 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BEM3X-5.0 FAQ
1.How can I place an order for LM4050BEM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3X-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 LM4050BEM3X-5.0 reliable?
The price and inventory of LM4050BEM3X-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 LM4050BEM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4050BEM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3X-5.0?
LM4050BEM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3X-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 LM4050BEM3X-5.0?
For technical support, including LM4050BEM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3X-5.0 requirements.
6.How does Aetrix verify that LM4050BEM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3X-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 LM4050BEM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4050BEM3X-5.0?
All LM4050BEM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3X-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 LM4050BEM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4050BEM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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