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Texas Instruments LM4040A30IDBZTG4
- Part No.:
- LM4040A30IDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040A30IDBZTG4.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,796
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Product details
Overview
LM4040A30IDBZTG4 from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 3.0V output with ±0.1% initial accuracy (A-grade), 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 47μA to 15mA cathode current - used in high-accuracy analog input modules and data-acquisition front-ends.
For engineers reviewing the LM4040A30IDBZTG4 datasheet, LM4040A30IDBZTG4 pinout, LM4040A30IDBZTG4 application, or LM4040A30IDBZTG4 equivalent, key selection criteria include industrial-temperature (–40°C to +85°C) operation, SOT-23-3 package compatibility, low dynamic impedance (0.4Ω typical), thermal hysteresis ≤0.08%, and no external capacitor requirement for stability.
Technical Context
The LM4040A30IDBZTG4 operates as a two-terminal shunt reference, sinking cathode current (IZ) to regulate voltage across its terminals. Its Zener-based architecture uses wafer-level fuse and Zener-zap trimming to achieve ±0.1% initial tolerance at 25°C and maintains tight drift over –40°C to +85°C via low-tempco design.
It exhibits low dynamic impedance (0.4Ω at 1mA), minimal voltage shift vs. cathode current (≤9mV over 1–15mA), and intrinsic stability with all capacitive loads - eliminating need for output capacitance while supporting portable and space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal; enables direct interface with 3V ADC references and microcontroller VREF inputs. |
| Initial Accuracy | ±0.1% at 25°C; ensures ≤3mV absolute error without calibration in precision sensor signal chains. |
| Tempco | 100ppm/°C max; contributes ≤21mV drift over –40°C to +85°C ambient, critical for field transmitter long-term stability. |
| Noise (10Hz–10kHz) | 35μVRMS typical; minimizes added uncertainty in 16-bit+ data acquisition systems. |
| Min Cathode Current | 47μA typical; supports ultra-low-power battery-operated sensors and energy-harvesting nodes. |
| Dynamic Impedance | 0.4Ω typical at 1mA; maintains regulation under fast load transients in analog front-ends. |
| Thermal Hysteresis | ≤0.08% (≈2.4mV); preserves repeatability after thermal cycling in automotive and industrial environments. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, thermally efficient, compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current/voltage input | Connected to regulated node; sinks current to maintain 3.0V across anode–cathode. |
| Anode (Pin 2) | Common ground reference | Typically tied to system ground; forms return path for cathode current. |
| NC (Pin 3) | No internal connection | Unused terminal; must be left floating or tied to anode per EMI mitigation guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0V output | Eliminates external resistor network; reduces BOM count and layout sensitivity in compact analog designs. |
| Stable with all capacitive loads | Enables direct connection to ADC input caps or op-amp feedback networks without destabilizing oscillation risk. |
| Wide operating current range (47μA–15mA) | Supports both ultra-low-power sleep modes and full-speed data capture without reference dropout. |
| Low 35μVRMS noise | Preserves effective resolution in 16-bit SAR and delta-sigma converters without post-filtering overhead. |
| Industrial temperature range (–40°C to +85°C) | Validated for deployment in factory automation I/O modules and outdoor energy infrastructure monitoring. |
Applications
| Analog Input Module | Data-Acquisition System |
|---|---|
Use Scenario: High-channel-count PLC analog input card measuring 4–20mA sensor signals with 16-bit isolation amplifiers. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0V reference for ADC driver stages and gain-setting resistors. Use Value: ±0.1% initial accuracy and 100ppm/°C tempco ensure ≤0.25% total unadjusted error over temperature without calibration. | Use Scenario: Portable handheld multimeter with dual-slope or sigma-delta ADC requiring low-noise, stable reference. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core and autoranging circuitry. Use Value: 35μVRMS noise prevents degradation of ENOB below 15.8 bits in 100ksps sampling. |
| Field Transmitter | Energy Infrastructure |
Use Scenario: Loop-powered 4–20mA temperature transmitter operating in harsh industrial environments. IC Role / Device Role / Timing Role: Precision shunt reference powering internal signal conditioning and DAC feedback loop. Use Value: Thermal hysteresis ≤0.08% ensures repeatable zero-point stability after thermal cycling between –40°C startup and +70°C operation. | Use Scenario: Smart electricity meter with metrology-grade ADC and anti-tampering monitoring circuits. IC Role / Device Role / Timing Role: Reference source for voltage and current channel measurement paths and tamper-detection comparators. Use Value: Stable 3.0V output with no external capacitor simplifies layout in constrained meter PCBs and improves long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C30IDBZRG4 | ±0.5% initial accuracy, same 3.0V output and SOT-23-3 package | Acceptable where cost sensitivity outweighs need for <0.1% system accuracy | Select when calibration is performed or system tolerances allow higher reference error contribution. |
| TL431ACDBZR | Adjustable 2.5V reference (via external resistors), 0.5% accuracy, higher 1mA min cathode current | Requires external resistors; less suitable for space-constrained or ultra-low-IQ designs | Choose only if programmability or higher output current capability (>100mA) is required. |
Compared with LM4040C30IDBZRG4, the LM4040A30IDBZTG4 delivers 5× tighter initial tolerance and lower thermal drift impact; versus TL431ACDBZR, it offers lower quiescent current, smaller footprint, and fixed-output simplicity - making it optimal for miniaturized, battery-aware precision analog systems.
Availability
LM4040A30IDBZTG4 is available at Aetrix Electronics and suitable for analog input modules, data-acquisition systems, and field transmitters requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for LM4040A30IDBZTG4 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade components.
The LM4040 series was designed for high-accuracy, low-power shunt reference applications in industrial, energy, and test equipment - emphasizing stability, noise performance, and ease of use without external compensation.
FAQ
What is the operating temperature range for LM4040A30IDBZTG4?
The LM4040A30IDBZTG4 is characterized for industrial temperature operation from –40°C to +85°C, with full electrical specifications guaranteed across this range per TI's SLOS456Q datasheet Section 6.11. It does not support extended –40°C to +125°C operation like Q-grade variants.
Does LM4040A30IDBZTG4 require an external output capacitor?
No, LM4040A30IDBZTG4 is stable with all capacitive loads and requires no external output capacitor - a key advantage confirmed in the device description and Section 8.2 of the datasheet. This simplifies layout and improves reliability in space-constrained designs.
What is the minimum cathode current needed for regulation in LM4040A30IDBZTG4?
The LM4040A30IDBZTG4 requires a minimum cathode current of 47μA (typical) at 25°C to maintain regulation, rising to 82μA maximum over the full –40°C to +85°C range, as specified in Section 6.11 Electrical Characteristics.
How does the noise performance of LM4040A30IDBZTG4 affect ADC accuracy?
With 35μVRMS wideband noise (10Hz–10kHz), LM4040A30IDBZTG4 contributes <0.001 LSB error to a 3.0V-referenced 16-bit ADC (LSB = 45.8μV), preserving effective resolution without requiring additional filtering or averaging.
Is LM4040A30IDBZTG4 pin-compatible with other LM4040 variants in SOT-23-3?
Yes, all LM4040x30I variants in DBZ (SOT-23-3) package - including LM4040A30IDBZTG4, LM4040B30IDBZRG4, and LM4040C30IDBZRG4 - share identical pinout (Cathode/Anode/NC), footprint, and solder profile, enabling drop-in accuracy grade upgrades on existing PCBs.
LM4040A30IDBZTG4 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:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°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
LM4040A30IDBZTG4 FAQ
1.How can I place an order for LM4040A30IDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040A30IDBZTG4 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 LM4040A30IDBZTG4 reliable?
The price and inventory of LM4040A30IDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040A30IDBZTG4 is usually 5 days.
3.What payment methods are accepted for LM4040A30IDBZTG4?
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4.How is shipping managed for LM4040A30IDBZTG4?
LM4040A30IDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040A30IDBZTG4 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 LM4040A30IDBZTG4?
For technical support, including LM4040A30IDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040A30IDBZTG4 requirements.
6.How does Aetrix verify that LM4040A30IDBZTG4 is sourced from the original manufacturer or authorized distributors?
All LM4040A30IDBZTG4 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 LM4040A30IDBZTG4 meets industry standards.
7.What is the process for return or replacement of LM4040A30IDBZTG4?
All LM4040A30IDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040A30IDBZTG4, 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 LM4040A30IDBZTG4 part is unused and in its original packaging.
Return procedure for LM4040A30IDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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