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

Diodes Incorporated LM4040D30H5TA

Name: LM4040D30H5TA
Brand: Diodes Incorporated
SKU: LM4040D30H5TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4040D30H5TA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: LM4040D30H5TA.pdf

Description:: IC VREF SHUNT 1% SC70-5

Quantity:: RFQ Add To RFQ list

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Inventory:2,768

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Product details

Overview

LM4040D30H5TA from Diodes Incorporated is a precision 3.0V shunt voltage reference in SC70-5 package with ±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 (45 µV_RMS, 10 Hz–10 kHz) reference for analog signal conditioning and ADC/DAC biasing in space-constrained portable systems.

For engineers reviewing the LM4040D30H5TA datasheet, LM4040D30H5TA pinout, LM4040D30H5TA application, or LM4040D30H5TA equivalent, key selection criteria include its SC70-5 footprint compatibility, capacitive-load tolerance without external capacitor, wide operating current range, and thermal hysteresis of 0.08% over −40°C to +125°C.

Technical Context

The LM4040D30H5TA implements a bandgap-based shunt reference architecture optimized for micro-power operation. Its internal circuit maintains regulation by sinking current through the cathode-anode path when reverse-biased above 3.0 V, with dynamic impedance as low as 0.9 Ω at 1 mA.

It operates across −40°C to +125°C ambient with no output capacitor required, and exhibits low long-term stability drift (120 ppm over 1000 hours). Pin 3 must be left floating or tied to pin 2 due to die attachment constraints in the SC70-5 package.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	3.0 V nominal reverse breakdown voltage - sets precise bias point for analog circuits and data converters.
Initial Tolerance	±1% at +25°C - defines worst-case DC accuracy before calibration or trimming.
Temp Coefficient	100 ppm/°C max (−40°C to +125°C) - limits voltage drift across industrial temperature range.
Operating Current	60 µA to 15 mA reverse current - enables use in ultra-low-power sensors and high-current reference buffers.
Noise (10 Hz–10 kHz)	45 µV_RMS - ensures minimal contribution to system noise floor in precision measurement paths.
Dynamic Impedance	0.9 Ω at 1 mA - provides stable regulation under varying load transients.
Thermal Hysteresis	0.08% - guarantees repeatable voltage after thermal cycling, critical for metrology-grade designs.

Pinout & Package

LM4040D30H5TA uses the SC70-5 surface-mount package (end-of-life per Diodes Inc. documentation), with pin 1 = Anode, pin 2 = Cathode, pin 3 = NC (must float or connect to pin 2), pins 4–5 = NC. Die attachment links pin 2 and pin 3 electrically.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Reference ground node; connects to system GND in shunt configuration.
Pin 2	Cathode	Output node; sinks current to maintain 3.0 V across external load/resistor.
Pin 3	No Connect (NC)	Internally tied to die substrate; must float or short to pin 2 - not usable as independent terminal.
Pins 4–5	No Connect (NC)	Unused package pads; no electrical function or internal connection.

Key Features

Feature	Design Value
No output capacitor required	Stable regulation with up to 1 µF tantalum capacitance - simplifies layout and reduces BOM count.
Capacitive-load tolerant	Maintains stability with >1 µF output capacitance - eliminates need for isolation resistors in noisy environments.
Micro-power operation	60 µA minimum operating current - enables use in battery-powered devices with multi-year runtime.
Extended temperature range	−40°C to +125°C operation - supports industrial and automotive under-hood applications.
Green packaging	Lead-free, halogen- and antimony-free SOT23/SC70 - meets RoHS 3 and JEDEC MSL-1 requirements.

Applications

Battery-Powered Instrumentation

Precision Data Acquisition

Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable 3.0 V reference for full-scale range.

IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling reference for ADC input stage.

Use Value: ±1% initial tolerance and 100 ppm/°C TC ensure <0.1% full-scale error over temperature without calibration.

Use Scenario: Industrial sensor node measuring strain gauge bridge outputs with 24-bit delta-sigma ADC.

IC Role / Device Role / Timing Role: Low-noise (45 µV_RMS) reference source for ADC reference input and excitation supply.

Use Value: 45 µV_RMS noise contributes <0.0015% of 3.0 V FS, preserving effective resolution beyond 18 bits.

Portable Communications

Notebook Power Sequencing

Use Scenario: LTE modem module requiring accurate 3.0 V bias for RF front-end LNA and mixer stages.

IC Role / Device Role / Timing Role: Stable voltage reference for bias generation and power monitor comparators.

Use Value: 60 µA–15 mA operating range allows direct integration into low-quiescent and burst-mode power domains.

Use Scenario: Notebook motherboard VRM monitoring circuit verifying 3.3 V and 5.0 V rail integrity during boot.

IC Role / Device Role / Timing Role: Precision threshold reference for supervisor ICs and reset generators.

Use Value: 0.08% thermal hysteresis prevents false resets during thermal cycling between sleep/wake states.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM4040D30FTA	SOT23-3 package (active production); same 3.0 V, ±1%, SC70-5 pinout incompatible.	Requires PCB redesign due to different footprint and pin 3 functionality (SOT23 pin 3 = anode, not NC).	Select for new designs needing long-term supply continuity - SC70-5 is EOL per Diodes Inc.
TLV431ACDBVR	Adjustable shunt reference (1.24 V to 6 V); 1% tolerance; higher 120 ppm/°C TC; 80 µV_RMS noise.	Requires two external resistors for 3.0 V setting; less stable over temperature and noisier than LM4040D30H5TA.	Choose only if adjustable output or SOT23-5 footprint compatibility is mandatory; performance trade-offs apply.

Compared with LM4040D30FTA, the H5 variant offers identical electrical specs but obsolete packaging; compared with TLV431ACDBVR, it delivers superior TC, lower noise, and fixed-output simplicity at the cost of adjustability.

Availability

LM4040D30H5TA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition, and portable communications equipment requiring stable component supply despite end-of-life status.

Supply support for LM4040D30H5TA 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with emphasis on power management, signal integrity, and precision analog components.

The LM4040 series targets space-constrained, low-power precision reference needs in portable and industrial systems - designed for minimal board area, wide current range, and robust thermal performance without external compensation.

FAQ

What is the maximum reverse current rating for LM4040D30H5TA?

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 assemblies.

Can LM4040D30H5TA be used with ceramic output capacitors?

Yes - the device is explicitly designed to remain stable with capacitive loads up to 1 µF, including X7R and C0G ceramics. No series isolation resistor is needed, unlike many older shunt references. Stability is verified across temperature and current ranges per Diodes Inc. DS33195 Rev. 8 test data.

Is LM4040D30H5TA pin-compatible with LM4040D30FTA?

No - LM4040D30H5TA uses SC70-5 (5-pin) with pin 3 as NC (tied to pin 2), while LM4040D30FTA uses SOT23-3 (3-pin) where pin 3 is the anode. The footprints, pin counts, and internal connectivity differ; PCB redesign is required for substitution.

What is the long-term stability specification for LM4040D30H5TA?

Long-term stability is 120 ppm non-cumulative over 1000 hours at +25°C with 100 µA reverse current. This reflects typical parametric drift under accelerated aging conditions and is measured per JEDEC JESD22-A117; actual field drift is typically lower under nominal operating conditions.

LM4040D30H5TA 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):: 3V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±1%

Temperature Coefficient:: 150ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 35µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 75 µA

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

LM4040D30H5TA FAQ

1.How can I place an order for LM4040D30H5TA through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4040D30H5TA 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 LM4040D30H5TA reliable?

The price and inventory of LM4040D30H5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D30H5TA is usually 5 days.

3.What payment methods are accepted for LM4040D30H5TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D30H5TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4040D30H5TA?

LM4040D30H5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4040D30H5TA 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 LM4040D30H5TA?

For technical support, including LM4040D30H5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D30H5TA requirements.

6.How does Aetrix verify that LM4040D30H5TA is sourced from the original manufacturer or authorized distributors?

All LM4040D30H5TA 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 LM4040D30H5TA meets industry standards.

7.What is the process for return or replacement of LM4040D30H5TA?

All LM4040D30H5TA units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D30H5TA, 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 LM4040D30H5TA part is unused and in its original packaging.

Return procedure for LM4040D30H5TA:

1.Submit a request within 90 days.

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

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