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Texas Instruments LM4040D41IDBZTG4
- Part No.:
- LM4040D41IDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040D41IDBZTG4.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,783
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Product details
Overview
LM4040D41IDBZTG4 from Texas Instruments is a precision 4.096V shunt voltage reference in SOT-23-3 (DBZ) package, rated for industrial temperature range (–40°C to +85°C), with ±1.0% initial accuracy, 150ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation down to 45μA cathode current. It serves as a low-power, no-capacitor-required reference in high-resolution ADC biasing and sensor signal conditioning circuits.
For engineers reviewing the LM4040D41IDBZTG4 datasheet, LM4040D41IDBZTG4 pinout, LM4040D41IDBZTG4 application, or LM4040D41IDBZTG4 equivalent, key selection criteria include its D-grade tolerance, SOT-23-3 footprint compatibility, cathode current range (45μA–15mA), thermal hysteresis (0.08%), and extended-temperature availability via Q-variant derivatives.
Technical Context
The LM4040D41IDBZTG4 operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a precise 4.096V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon design delivers fixed output without external components and remains stable under all capacitive loads.
It features low dynamic impedance (≤1.1Ω at 1mA), tight long-term stability (120ppm after 1000h), and robust ESD protection (±2000V HBM). The device's performance is specified over –40°C to +85°C, with thermal hysteresis measured across –40°C to +125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; enables exact 12-bit full-scale alignment in 5V-supplied SAR ADCs. |
| Initial Accuracy | ±1.0% max at 25°C; corresponds to ±41mV tolerance, defining worst-case system offset in calibration-sensitive designs. |
| Tempco | 150ppm/°C max; contributes ≤±12.3mV drift over –40°C to +85°C ambient range. |
| Min Cathode Current | 45μA typical; supports ultra-low-power wake-up modes in battery-operated sensor nodes. |
| Wideband Noise | 35μVRMS (10Hz–10kHz); limits effective resolution to ~18.5 ENOB in precision 24-bit delta-sigma ADC front-ends. |
| Dynamic Impedance | ≤1.1Ω at 1mA; ensures <1mV output shift under 1mA load transients, critical for multiplexed reference sharing. |
| Thermal Hysteresis | 0.08% max; equates to ±3.3mV hysteresis error after thermal cycling, essential for repeatable metrology calibration. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92mm × 1.30mm footprint, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated supply rail; sinks all reference current-must be decoupled locally if driving switching loads. |
| Anode (Pin 2) | Common return / ground reference | Typically tied to system ground; forms the 0V reference point for VZ measurement and load return path. |
| NC (Pin 3) | No internal connection | Float or tie to anode per TI recommendation in high-EMI environments; no electrical function in standard operation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor operation | Eliminates BOM cost and board space for stabilization caps; simplifies layout in space-constrained modules. |
| Stability with all capacitive loads | Prevents oscillation when driving ADC input capacitance (e.g., 20pF SAR sample hold) without phase compensation. |
| Low 45μA minimum operating current | Enables use in always-on monitoring circuits powered by energy-harvesting sources (<100μW available). |
| 120ppm long-term stability | Reduces annual recalibration frequency in field-deployed instrumentation and process control transmitters. |
| ±2000V HBM ESD rating | Withstands handling and assembly stress without shielding, lowering manufacturing test overhead. |
Applications
| High-Accuracy Data Acquisition | Industrial Field Transmitter |
|---|---|
Use Scenario: 24-bit delta-sigma ADC digitizing thermocouple or RTD signals in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC full-scale range, directly setting LSB weight (0.5μV) and minimizing gain error. Use Value: Enables true 22-bit effective resolution by limiting reference-induced noise and drift contributions below 1LSB. | Use Scenario: 4–20mA loop-powered smart pressure transmitter operating in harsh factory environments. IC Role / Device Role / Timing Role: Supplies precision bias to bridge sensor amplifier and ADC, rejecting supply ripple and temperature-induced offset. Use Value: Maintains <±0.1% total error over –40°C to +85°C, meeting SIL-2 functional safety requirements for process shutdown systems. |
| Portable Energy Monitoring | Automotive Cabin Sensor Hub |
Use Scenario: Battery-powered clamp meter measuring AC mains current with isolated current transformer and low-power MCU. IC Role / Device Role / Timing Role: References the signal chain for RMS calculation and harmonic analysis, operating continuously from coin-cell supply. Use Value: Draws only 45μA quiescent current while delivering 4.096V accuracy, extending battery life beyond 5 years. | Use Scenario: In-cabin air quality sensor module (CO₂, VOC, humidity) integrated into automotive HVAC control unit. IC Role / Device Role / Timing Role: Supplies stable reference to multi-channel analog front-end shared across gas and humidity sensors. Use Value: Minimizes cross-sensor gain mismatch and thermal drift-induced calibration drift across vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C41IDBZR | Same 4.096V output, ±0.5% initial accuracy (C-grade), 75ppm/°C tempco, SOT-23-3 package. | Higher accuracy and lower drift suit metrology-grade calibration; requires higher min current (60μA). | Select when tighter initial tolerance and lower tempco justify cost premium and marginally higher power. |
| MAX6008AEUR+T | 4.096V output, ±0.2% initial accuracy (A-grade), 50ppm/°C tempco, SOT-23-3, but 100μA min cathode current. | Superior stability for lab-grade instruments; not suitable for sub-100μA ultra-low-power designs. | Choose for high-precision portable test equipment where power budget allows ≥100μA continuous draw. |
Compared with TL4050C41IDBZR and MAX6008AEUR+T, the LM4040D41IDBZTG4 offers the lowest minimum operating current (45μA) and broadest industrial temperature support among SOT-23-3 4.096V shunt references, making it optimal for energy-constrained embedded sensing where ±1% accuracy is acceptable.
Availability
LM4040D41IDBZTG4 is available at Aetrix Electronics and suitable for high-accuracy data acquisition, industrial field transmitters, portable energy monitoring, and automotive cabin sensor hubs requiring stable component supply across extended production lifecycles.
Supply support for LM4040D41IDBZTG4 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 reference design and high-volume manufacturing reliability.
The LM4040 series was engineered for cost-sensitive, space-constrained applications demanding micropower operation and uncompromised DC accuracy-targeting industrial automation, sensor interfaces, and portable instrumentation markets.
FAQ
What is the maximum cathode current rating for LM4040D41IDBZTG4?
The absolute maximum cathode current for LM4040D41IDBZTG4 is 25mA, per TI's Absolute Maximum Ratings. However, the recommended operating range is 45μA to 15mA. Exceeding 15mA may increase self-heating and degrade long-term stability or tempco performance, especially in poorly ventilated PCB layouts.
Does LM4040D41IDBZTG4 require an output capacitor for stability?
No, LM4040D41IDBZTG4 is inherently stable with all capacitive loads and does not require an output capacitor. This is confirmed in TI's datasheet Section 3 and Figure 8-2. Adding capacitance does not harm stability but provides no benefit-reducing BOM count and layout complexity in compact designs.
What is the thermal hysteresis specification for LM4040D41IDBZTG4?
The thermal hysteresis of LM4040D41IDBZTG4 is 0.08%, defined as the voltage difference measured at 25°C after cycling from –40°C versus after cycling from +125°C. This value is consistent across all LM4040 grades and packages, and directly impacts repeatability in calibration-critical applications like field instrument zeroing routines.
Can LM4040D41IDBZTG4 be used in automotive applications?
LM4040D41IDBZTG4 is qualified for industrial temperature range (–40°C to +85°C), not AEC-Q200 automotive grade. For under-hood or infotainment applications requiring automotive qualification, TI's LM4040Q series (e.g., LM4040D41IDBZRG4) - rated –40°C to +125°C and AEC-Q200 qualified - is the appropriate drop-in alternative.
How does the 45μA minimum cathode current of LM4040D41IDBZTG4 impact low-power design?
The 45μA typical minimum cathode current allows LM4040D41IDBZTG4 to operate in ultra-low-power modes-for example, enabling periodic wake-up of an ADC in a battery-powered IoT sensor node every 10 seconds while maintaining reference integrity. This eliminates need for reference enable/disable sequencing circuitry, reducing both component count and firmware complexity.
LM4040D41IDBZTG4 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):
- 4.096V
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040D41IDBZTG4 FAQ
1.How can I place an order for LM4040D41IDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D41IDBZTG4 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 LM4040D41IDBZTG4 reliable?
The price and inventory of LM4040D41IDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D41IDBZTG4 is usually 5 days.
3.What payment methods are accepted for LM4040D41IDBZTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D41IDBZTG4 transactions.
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4.How is shipping managed for LM4040D41IDBZTG4?
LM4040D41IDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D41IDBZTG4 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 LM4040D41IDBZTG4?
For technical support, including LM4040D41IDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D41IDBZTG4 requirements.
6.How does Aetrix verify that LM4040D41IDBZTG4 is sourced from the original manufacturer or authorized distributors?
All LM4040D41IDBZTG4 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 LM4040D41IDBZTG4 meets industry standards.
7.What is the process for return or replacement of LM4040D41IDBZTG4?
All LM4040D41IDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D41IDBZTG4, 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 LM4040D41IDBZTG4 part is unused and in its original packaging.
Return procedure for LM4040D41IDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040D41IDBZTG4 Tags
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