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Texas Instruments LM4040D50IDBZRG4
- Part No.:
- LM4040D50IDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040D50IDBZRG4.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,318
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Product details
Overview
LM4040D50IDBZRG4 from Texas Instruments is a precision micropower shunt voltage reference with 5.0V nominal output, ±1.0% initial accuracy (D grade), 150ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA cathode current. It serves as a compact, capacitor-free reference in analog input modules and portable data-acquisition systems.
For engineers reviewing the LM4040D50IDBZRG4 datasheet, LM4040D50IDBZRG4 pinout, LM4040D50IDBZRG4 application, or LM4040D50IDBZRG4 equivalent, key selection criteria include its SOT-23-3 package, industrial temperature range (–40°C to +85°C), low dynamic impedance (≤1.1Ω), thermal hysteresis of 0.08%, and compatibility with all capacitive loads without external stabilization.
Technical Context
The LM4040D50IDBZRG4 operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a stable 5.0V reverse breakdown voltage across its cathode-anode terminals. Its Zener-zap trimmed silicon design achieves D-grade tolerance via wafer-level fuse trimming, with no internal amplification or active regulation circuitry.
It delivers stable performance across –40°C to +85°C ambient temperatures, exhibits minimal voltage drift versus cathode current (≤10mV over 1mA–15mA), and maintains low dynamic impedance (<1.1Ω at 1mA/120Hz) - enabling high-accuracy feedback in precision ADC biasing and sensor excitation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V nominal at IZ = 100μA; ensures accurate scaling for 5V-rail ADCs and DACs |
| Initial Accuracy | ±1.0% max at 25°C (D grade); defines absolute voltage error before temperature or load effects |
| Temp Coefficient | 150ppm/°C max; contributes ≤±0.125V drift over –40°C to +85°C operating range |
| Min Cathode Current | 45μA typical; enables ultra-low-power operation in battery-powered sensor nodes |
| Wideband Noise | 35μVRMS (10Hz–10kHz); supports high-resolution (≥16-bit) analog measurements |
| Dynamic Impedance | ≤1.1Ω at 1mA/120Hz; minimizes load-induced voltage variation in dynamic current-sink applications |
| Thermal Hysteresis | 0.08% max; limits repeatability error after thermal cycling between –40°C and +125°C |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, thermally efficient plastic case with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current/voltage input | Connected to supply rail; sinks adjustable current to regulate voltage at anode node |
| Anode (Pin 2) | Common reference node | Typically grounded; forms reference output node with cathode (VZ appears across pins 1–2) |
| NC (Pin 3) | No internal connection | Must float or connect to anode per EMI mitigation guidance; no functional role in basic operation |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load; eliminates BOM cost and layout area for output capacitor |
| Micropower operation | 45μA typical minimum cathode current enables >10-year battery life in IoT sensor transmitters |
| Low-noise reference | 35μVRMS noise supports 16-bit+ SAR and delta-sigma ADCs without external filtering |
| Extended temp support | Specified from –40°C to +85°C; qualified for industrial and automotive under-hood environments |
| Low thermal hysteresis | 0.08% max voltage shift after thermal cycling; critical for repeatable calibration in field instruments |
Applications
| Industrial Analog Input Module | Portable Data-Acquisition System |
|---|---|
Use Scenario: 4–20mA loop-powered transmitter conditioning analog sensor signals before digitization. IC Role / Device Role / Timing Role: Shunt reference providing precise 5.0V excitation and ADC reference voltage. Use Value: ±1.0% initial accuracy and 150ppm/°C TC ensure <±0.25% total system gain error over full industrial temperature range. |
Use Scenario: Handheld multimeter or environmental logger acquiring voltage, temperature, and humidity. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit sigma-delta ADC and sensor biasing network. Use Value: 35μVRMS noise and 45μA min current enable >90dB SNR and multi-year coin-cell operation. |
| Energy Infrastructure Monitoring | Automotive Cabin Sensor Node |
Use Scenario: Smart meter voltage monitoring channel measuring grid AC voltage via resistive divider. IC Role / Device Role / Timing Role: Stable 5.0V reference for isolation amplifier input stage and microcontroller ADC. Use Value: Capacitor-free operation simplifies creepage/clearance compliance in high-voltage meter PCB layouts. |
Use Scenario: Occupancy or air quality sensor module mounted near HVAC ducts in vehicle cabin. IC Role / Device Role / Timing Role: Reference source for NTC thermistor measurement and CO₂ sensor signal chain. Use Value: 0.08% thermal hysteresis prevents calibration drift after repeated cabin temperature cycling (–40°C to +85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | 5.0V, ±0.5% (C grade), 50ppm/°C, SOT-23-3, 75μA min IZ | Higher accuracy and lower TC, but requires higher minimum current; less suitable for sub-100μA systems | Select when tighter initial tolerance and temperature stability outweigh micropower requirements |
| MAX6005EUR+T | 5.0V, ±0.2% (B grade), 75ppm/°C, SOT-23-3, 60μA min IZ, 20μVRMS noise | Lower noise and better TC than LM4040D50IDBZRG4, but higher cost and single-source availability | Choose for high-precision medical or test equipment where 20μVRMS noise justifies premium pricing |
Compared with TL4050C50IDBZR and MAX6005EUR+T, the LM4040D50IDBZRG4 offers the lowest minimum operating current (45μA) and broadest production availability, making it optimal for cost-sensitive, battery-constrained industrial sensors - though with relaxed accuracy and higher noise.
Availability
LM4040D50IDBZRG4 is available at Aetrix Electronics and suitable for industrial analog input modules, portable data-acquisition systems, and energy infrastructure monitoring requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040D50IDBZRG4 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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision analog ICs and power management.
The LM4040 series was designed specifically for space-constrained, low-power applications needing stable, capacitor-free voltage references - targeting industrial sensing, portable instrumentation, and automotive subsystems.
FAQ
What is the operating temperature range for the LM4040D50IDBZRG4?
The LM4040D50IDBZRG4 is characterized for operation from –40°C to +85°C (industrial temperature range). This specification is confirmed in Section 4 (Device Comparison Table) and Section 6.3 (Recommended Operating Conditions) of the TI datasheet SLOS456Q. The 'I' suffix in the part number explicitly denotes the industrial grade temperature rating.
Does the LM4040D50IDBZRG4 require an external output capacitor?
No, the LM4040D50IDBZRG4 is stable with all capacitive loads and does not require an external output capacitor for operation. This is a core feature stated in the "Features" section and verified in the "Description" and "Stability" sections of the TI datasheet, enabling simplified PCB layout and reduced BOM count.
What is the minimum cathode current needed for regulation in the LM4040D50IDBZRG4?
The LM4040D50IDBZRG4 has a typical minimum cathode current (IZ,min) of 45μA at 25°C, with a maximum of 80μA over the full –40°C to +85°C range. This value is specified in Table 6.17 (LM4040C50I, LM4040D50I Electrical Characteristics) of the official TI datasheet.
How does the LM4040D50IDBZRG4 differ from the 'Q' grade variant?
The LM4040D50IDBZRG4 is the industrial-grade ('I') version rated for –40°C to +85°C. The 'Q' grade (e.g., LM4040D50QDBZR) is automotive-qualified for –40°C to +125°C operation and undergoes additional AEC-Q100 stress testing - but shares identical electrical specs, pinout, and package with the 'I' grade.
What is the thermal hysteresis specification for the LM4040D50IDBZRG4?
The LM4040D50IDBZRG4 has a thermal hysteresis of 0.08%, defined as the voltage difference measured at 25°C after cycling to –40°C versus after cycling to +125°C. This parameter is explicitly listed in Tables 6.17 and 6.18 of the TI datasheet and applies identically across all LM4040 grades and voltages.
LM4040D50IDBZRG4 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040D50IDBZRG4 FAQ
1.How can I place an order for LM4040D50IDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D50IDBZRG4 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 LM4040D50IDBZRG4 reliable?
The price and inventory of LM4040D50IDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D50IDBZRG4 is usually 5 days.
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LM4040D50IDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D50IDBZRG4 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 LM4040D50IDBZRG4?
For technical support, including LM4040D50IDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D50IDBZRG4 requirements.
6.How does Aetrix verify that LM4040D50IDBZRG4 is sourced from the original manufacturer or authorized distributors?
All LM4040D50IDBZRG4 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 LM4040D50IDBZRG4 meets industry standards.
7.What is the process for return or replacement of LM4040D50IDBZRG4?
All LM4040D50IDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D50IDBZRG4, 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 LM4040D50IDBZRG4 part is unused and in its original packaging.
Return procedure for LM4040D50IDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040D50IDBZRG4 Tags
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TL431AIDBZR
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