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Texas Instruments LM4040D30IDBZT
- Part No.:
- LM4040D30IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040D30IDBZT.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:966
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Product details
Overview
LM4040D30IDBZT from Texas Instruments is a precision 3.0V shunt voltage reference in SOT-23-3 (DBZ) package, rated for –40°C to 85°C operation, with ±1.0% initial accuracy, 150ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation down to 45μA cathode current. It serves as a compact, low-power voltage reference in analog signal conditioning paths of industrial data-acquisition modules.
For engineers reviewing the LM4040D30IDBZT datasheet, LM4040D30IDBZT pinout, LM4040D30IDBZT application, or LM4040D30IDBZT equivalent, key selection criteria include guaranteed 3.0V output tolerance over temperature, minimal dynamic impedance (≤1.2Ω), compatibility with all capacitive loads without external capacitor, and suitability for space-constrained, battery-powered instrumentation.
Technical Context
The LM4040D30IDBZT operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a stable 3.0V reverse breakdown voltage across its terminals. Its Zener-zap trimmed bandgap core delivers specified accuracy and temperature stability without requiring external components.
It features low dynamic impedance (0.4–1.2Ω), low wideband noise (35μVRMS), and thermal hysteresis of 0.08%, enabling high-precision ADC/DAC biasing and sensor excitation where long-term drift and noise must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal at IZ = 100μA; tight regulation enables accurate 12-bit+ ADC reference scaling |
| Initial Accuracy | ±1.0% max at 25°C; defines worst-case offset in calibration-sensitive circuits |
| Temp Coefficient | 150ppm/°C max; contributes ≤±0.195% error over –40°C to 85°C ambient range |
| Cathode Current Range | 45μA to 15mA; supports ultra-low-power sleep modes and full-range active operation |
| Dynamic Impedance | ≤1.2Ω at IZ = 1mA; ensures minimal load-induced voltage shift in varying-current applications |
| Wideband Noise | 35μVRMS (10Hz–10kHz); preserves SNR in precision analog front-ends |
| Thermal Hysteresis | 0.08%; limits repeatability error after thermal cycling in field-deployed equipment |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, thermally enhanced plastic body with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated supply rail; sinks current to maintain 3.0V drop across device |
| Anode (Pin 2) | Common reference / ground return | Typically tied to system ground; forms reference potential for downstream circuitry |
| NC (Pin 3) | No internal connection | Must float or connect to anode per TI EMI guidance; no functional role in basic operation |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor operation | Stable with any capacitive load up to 100nF; eliminates BOM cost and layout area for external capacitor |
| Extended temperature support | Specified from –40°C to +85°C; suitable for industrial control cabinets and outdoor metering enclosures |
| Low micropower consumption | 45μA minimum cathode current enables >10-year battery life in wireless sensor nodes |
| High DC accuracy grade | D-grade (±1.0%) offers optimal cost/performance balance for non-critical calibration tasks |
| Robust ESD rating | ±2000V HBM; withstands handling and board assembly without special precautions |
Applications
| Data-Acquisition Systems | Analog Input Module |
|---|---|
Use Scenario: High-resolution 16-bit SAR ADC reference in PLC analog input cards. IC Role / Device Role / Timing Role: Provides stable 3.0V reference voltage for ADC full-scale scaling and offset nulling. Use Value: Enables <±0.5 LSB integral nonlinearity by limiting reference drift to <±3mV over operating temperature. | Use Scenario: Signal conditioning stage in modular I/O systems with isolated 4–20mA inputs. IC Role / Device Role / Timing Role: Supplies precise excitation voltage for RTD and bridge sensors prior to isolation amplification. Use Value: Maintains <0.1% gain error across –25°C to 70°C ambient due to 150ppm/°C tempco and low hysteresis. |
| Field Transmitters | Energy Infrastructure |
Use Scenario: Loop-powered 4–20mA transmitter with onboard microcontroller and DAC. IC Role / Device Role / Timing Role: References DAC output and powers internal LDO for digital section from same 3.0V rail. Use Value: Supports 45μA minimum current requirement while delivering stable 3.0V under varying loop load conditions. | Use Scenario: Voltage monitoring in smart electricity meters with anti-tampering features. IC Role / Device Role / Timing Role: Supplies reference for metrology ADC measuring phase voltage and current waveforms. Use Value: Delivers 35μVRMS noise floor compatible with Class 0.2 metering accuracy requirements per IEC 62053. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | ±0.5% initial accuracy, 100ppm/°C tempco, same SOT-23-3 package | Better accuracy/tempco but higher minimum current (60μA vs 45μA) | Select when tighter reference stability is required and system can support higher quiescent current |
| REF3030AIDBZR | Series topology, 3.0V output, ±0.2% accuracy, 50ppm/°C, requires input headroom | Higher power, needs ≥3.3V supply; unsuitable for low-headroom or shunt-configured designs | Choose only if series architecture is acceptable and supply margin permits ≥300mV dropout |
Compared with TL4050C30IDBZR and REF3030AIDBZR, the LM4040D30IDBZT provides the lowest minimum operating current and simplest two-terminal interface, making it optimal for ultra-low-power, space-constrained shunt-reference applications where ±1.0% accuracy suffices.
Availability
LM4040D30IDBZT is available at Aetrix Electronics and suitable for industrial data-acquisition systems, analog input modules, field transmitters, and energy infrastructure metering requiring stable component supply and long-term production continuity.
Supply support for LM4040D30IDBZT 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 voltage references and industrial-grade IC design.
The LM4040 family was engineered for high-accuracy, low-power shunt reference applications in harsh environments-targeting data acquisition, process control, and sensor signal conditioning where reliability and stability are critical.
FAQ
What is the maximum operating temperature range for the LM4040D30IDBZT?
The LM4040D30IDBZT is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade specification ensures reliable performance in factory automation, building controls, and outdoor metering applications where environmental extremes are expected. The LM4040D30IDBZT does not support the extended –40°C to +125°C range offered by Q-grade variants like LM4040D30QDBZT.
Does the LM4040D30IDBZT require an external output capacitor?
No, the LM4040D30IDBZT is stable with all capacitive loads and requires no external output capacitor. Its internal design ensures unconditional stability up to at least 100nF, simplifying PCB layout and reducing BOM count. This feature is explicitly validated in the datasheet and applies directly to the LM4040D30IDBZT across its full operating current range.
What is the minimum cathode current needed for the LM4040D30IDBZT to regulate properly?
The LM4040D30IDBZT requires a minimum cathode current of 45μA (typical) at 25°C to maintain regulation within specifications. At full temperature range (–40°C to +85°C), the guaranteed minimum is 80μA. This ultra-low current enables use in battery-powered devices where standby current must remain below 100μA, such as wireless sensor transmitters using the LM4040D30IDBZT.
How does the LM4040D30IDBZT compare to A-grade or B-grade versions of the same voltage?
The LM4040D30IDBZT offers ±1.0% initial accuracy and 150ppm/°C temperature coefficient-looser than A-grade (±0.1%, 100ppm/°C) or B-grade (±0.2%, 100ppm/°C) variants-but at lower cost and identical package. Its D-grade specification targets cost-sensitive applications where moderate accuracy suffices, such as non-critical sensor biasing or mid-tier industrial controls, while retaining the same noise, dynamic impedance, and thermal hysteresis performance as higher grades.
Can the LM4040D30IDBZT be used in place of the LM4040C30IDBZT?
Yes, the LM4040D30IDBZT is pin-compatible and functionally substitutable for the LM4040C30IDBZT, differing only in initial accuracy (±1.0% vs ±0.5%) and temperature coefficient (150ppm/°C vs 100ppm/°C). Both share identical SOT-23-3 package, pinout, electrical behavior, and operating current range. Substitution is valid when the application tolerates the wider tolerance band and higher tempco of the D-grade LM4040D30IDBZT.
LM4040D30IDBZT 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:
- Active
- 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:
- 82 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040D30IDBZT FAQ
1.How can I place an order for LM4040D30IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D30IDBZT 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 LM4040D30IDBZT reliable?
The price and inventory of LM4040D30IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D30IDBZT is usually 5 days.
3.What payment methods are accepted for LM4040D30IDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D30IDBZT transactions.
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4.How is shipping managed for LM4040D30IDBZT?
LM4040D30IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D30IDBZT 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 LM4040D30IDBZT?
For technical support, including LM4040D30IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D30IDBZT requirements.
6.How does Aetrix verify that LM4040D30IDBZT is sourced from the original manufacturer or authorized distributors?
All LM4040D30IDBZT 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 LM4040D30IDBZT meets industry standards.
7.What is the process for return or replacement of LM4040D30IDBZT?
All LM4040D30IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D30IDBZT, 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 LM4040D30IDBZT part is unused and in its original packaging.
Return procedure for LM4040D30IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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