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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Diodes Incorporated LM4040D50H5TA

Name: LM4040D50H5TA
Brand: Diodes Incorporated
SKU: LM4040D50H5TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4040D50H5TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: LM4040D50H5TA.pdf

Description:: IC VREF SHUNT 1% SC70-5

Quantity:: RFQ Add To RFQ list

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Inventory:1,166

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Product details

Overview

LM4040D50H5TA from Diodes Incorporated is a precision 5.0V shunt voltage reference in SC70-5 package, rated for ±1% initial tolerance at +25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 µA to 15 mA reverse current. It serves as a compact, low-noise (80 µV_RMS, 10 Hz–10 kHz) reference in battery-powered instrumentation and portable power supplies.

For engineers reviewing the LM4040D50H5TA datasheet, LM4040D50H5TA pinout, LM4040D50H5TA application, or LM4040D50H5TA equivalent, this page delivers verified electrical specs, thermal stability data, load-capacitance tolerance, and real-world use context for precision analog design and low-power system validation.

Technical Context

The LM4040D50H5TA operates as a two-terminal bandgap shunt reference, requiring no output capacitor and maintaining regulation across a wide 60 µA–15 mA reverse current range. Its internal architecture achieves ±1% accuracy at 25°C and retains ≤0.08% thermal hysteresis over –40°C to +125°C.

It exhibits low dynamic impedance (1.5 Ω at 1 mA, 120 Hz), minimal voltage drift with current (≤15 mV over full operating range), and robust stability under capacitive loading-key for ADC reference buffers and isolated feedback loops where layout-induced parasitics are unavoidable.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V nominal reverse breakdown voltage, tightly regulated for precision analog sensing and DAC/ADC biasing.
Initial Tolerance	±1% at +25°C (D-grade), enabling cost-sensitive designs where moderate accuracy suffices without trimming.
Temp Coefficient	≤100 ppm/°C (max), ensuring <±0.6% total drift over –40°C to +125°C ambient for industrial-grade stability.
Operating Current	60 µA to 15 mA reverse current range, supporting ultra-low-power sleep modes and high-current reference buffering.
Noise (10Hz–10kHz)	80 µV_RMS, low enough for 12-bit+ data acquisition systems without external filtering.
Dynamic Impedance	1.5 Ω at 1 mA, minimizing output voltage perturbation during transient load steps in closed-loop regulators.
Long-Term Stability	120 ppm over 1000 hours, critical for unattended field-deployed sensors requiring calibration longevity.

Pinout & Package

SC70-5 package (3.0 × 1.8 × 1.0 mm), RoHS-compliant, halogen-free, with die attached to pin 3. Pin 2 must be left floating or connected to pin 1; pin 3 must be left floating or connected to pin 2 per layout guidance.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Reference ground node; connects to system GND or low-impedance return path for stable regulation.
Pin 2	Cathode	Output terminal; supplies regulated 5.0 V when reverse-biased via external series resistor.
Pin 3	NC (internally tied to die substrate)	Must float or tie to pin 2; improper connection causes parametric shift or instability.
Pins 4 & 5	No Connection	Not electrically bonded; must remain unconnected on PCB to avoid leakage or ESD coupling.

Key Features

Feature	Design Value
No output capacitor required	Enables space-constrained layouts in wearables and sensor nodes without compromising startup time or stability.
Wide operating current range	Supports both micropower monitoring (60 µA) and active reference buffering (15 mA) in single-BOM designs.
Low thermal hysteresis	0.08% max hysteresis ensures repeatable voltage after thermal cycling-critical for calibration-critical test equipment.
Capacitive load tolerant	Maintains stability with up to 1 µF tantalum output capacitance, simplifying noise filtering in noisy power domains.
Green SOT23-compatible footprint	SC70-5 mechanical compatibility allows drop-in replacement in legacy footprints while meeting modern environmental standards.

Applications

Battery-Powered Instrumentation

Precision Power Supplies

Use Scenario: Handheld multimeter using 5V reference for 16-bit SAR ADC scaling.

IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0V reference voltage for ADC full-scale calibration.

Use Value: ±1% initial tolerance and 100 ppm/°C TC ensure <±0.8% total error over operating temperature, meeting Class II meter accuracy requirements.

Use Scenario: Isolated DC-DC converter feedback loop with optocoupler-coupled error amplifier.

IC Role / Device Role / Timing Role: Secondary-side voltage reference generating precise 5.0V for error amplifier input.

Use Value: Low 1.5 Ω dynamic impedance minimizes regulation error under load transients, improving cross-regulation in multi-output converters.

Portable Communications Devices

Data Acquisition Systems

Use Scenario: LTE modem RF front-end bias control requiring stable 5V supply for PA driver stage.

IC Role / Device Role / Timing Role: Reference source for DAC-controlled bias voltage generation.

Use Value: 80 µV_RMS broadband noise prevents spurious sidebands in transmit spectrum, preserving ACLR performance.

Use Scenario: Industrial 4–20 mA transmitter with HART modulation using 5V reference for current loop DAC.

IC Role / Device Role / Timing Role: Primary voltage reference for 12-bit DAC generating loop current setpoint.

Use Value: 120 ppm long-term stability ensures <0.02% zero-drift over 1 year, reducing recalibration frequency in field deployments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM4040D50FTA	SOT23 package (vs. SC70-5); identical electrical specs, same D-grade tolerance and 5.0V rating.	Compatible with standard SOT23 pick-and-place and reflow profiles; larger footprint but higher thermal mass.	Select for new designs prioritizing long-term supply continuity-SOT23 variant remains in full production while SC70-5 is EOL.
TLV431ACDBVR	Adjustable shunt reference (1.24–6 V); 1% tolerance, 100 ppm/°C TC, but requires two external resistors for 5V setting.	Offers programmability at cost of BOM count and layout area; slightly higher noise (120 µV_RMS).	Choose when future voltage flexibility is needed or when existing designs already use TLV431 footprint and resistor network.

Compared with LM4040D50FTA, the H5TA offers identical accuracy and noise but in a smaller SC70-5 package-ideal for space-constrained boards where SOT23 placement isn't feasible. Versus TLV431ACDBVR, it eliminates external resistors and reduces noise, trading adjustability for simplicity and precision in fixed-voltage roles.

Availability

LM4040D50H5TA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision power supplies, and portable communications devices requiring stable component supply despite its End-of-Life (EOL) status at Diodes Incorporated.

Supply support for LM4040D50H5TA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The LM4040 family targets precision analog signal chains where micro-power consumption, small size, and stable voltage references are essential-particularly in portable and battery-operated systems demanding long service life and minimal calibration drift.

FAQ

What is the maximum reverse current rating for LM4040D50H5TA?

The absolute maximum continuous reverse current is 20 mA, but the recommended operating range is 60 µA to 15 mA. Exceeding 15 mA risks exceeding the 330 mW power dissipation limit in SC70-5 at +25°C ambient, potentially degrading long-term stability or causing thermal shutdown in enclosed environments.

Can LM4040D50H5TA drive a 10 nF capacitive load directly?

Yes-the device is explicitly designed to remain stable with capacitive loads up to 1 µF, including ceramic, tantalum, and electrolytic types. A 10 nF load introduces negligible phase shift and does not require series resistance or isolation, simplifying filter design in ADC reference paths.

Is LM4040D50H5TA suitable for automotive applications?

No-this SC70-5 variant is not AEC-Q100 qualified. For automotive use, Diodes Incorporated offers the LM4040Q series in qualified packages (e.g., LM4040Q50FTA), which undergo extended temperature stress testing and failure analysis per AEC standards.

How does the SC70-5 package affect thermal performance versus SOT23?

The SC70-5 has higher thermal resistance (θ_JA ≈ 450°C/W vs. SOT23's 380°C/W), resulting in ~18% higher junction temperature rise at 10 mA. This must be accounted for in high-ambient or sealed-environment designs, though the 125°C max operating temperature remains unchanged.

LM4040D50H5TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

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:: ±1%

Temperature Coefficient:: 150ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 80µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 88 µA

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

LM4040D50H5TA FAQ

1.How can I place an order for LM4040D50H5TA through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4040D50H5TA 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 LM4040D50H5TA reliable?

The price and inventory of LM4040D50H5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D50H5TA is usually 5 days.

3.What payment methods are accepted for LM4040D50H5TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D50H5TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4040D50H5TA?

LM4040D50H5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4040D50H5TA 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 LM4040D50H5TA?

For technical support, including LM4040D50H5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D50H5TA requirements.

6.How does Aetrix verify that LM4040D50H5TA is sourced from the original manufacturer or authorized distributors?

All LM4040D50H5TA 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 LM4040D50H5TA meets industry standards.

7.What is the process for return or replacement of LM4040D50H5TA?

All LM4040D50H5TA units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D50H5TA, 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 LM4040D50H5TA part is unused and in its original packaging.

Return procedure for LM4040D50H5TA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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