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Texas Instruments LM4040DIM3-4.1/NOPB
- Part No.:
- LM4040DIM3-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DIM3-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:26,289
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Product details
Overview
LM4040DIM3-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 4.096 V reverse breakdown voltage with ±1% initial tolerance (Grade D), 100 ppm/°C max temperature coefficient, and stable operation from 68 μA to 15 mA over −40°C to +85°C. It serves as a compact, capacitor-free reference for ADC/DAC biasing, sensor excitation, and industrial analog signal conditioning.
For engineers reviewing the LM4040DIM3-4.1/NOPB datasheet, LM4040DIM3-4.1/NOPB pinout, LM4040DIM3-4.1/NOPB application, or LM4040DIM3-4.1/NOPB equivalent, key selection criteria include its Grade D accuracy, SOT-23 thermal performance (RθJA = 291.9°C/W), no-output-capacitor design, and compatibility with capacitive loads in space-constrained systems.
Technical Context
The LM4040DIM3-4.1/NOPB uses Zener-zap trimming during wafer sort to achieve ±1% initial voltage accuracy at 25°C and integrates bandgap-derived curvature correction for low drift across temperature. Its shunt topology requires an external current-limiting resistor and sinks load current through the cathode terminal.
It operates without an output capacitor and maintains stability with any capacitive load-enabling direct connection to SAR ADC reference inputs or op-amp feedback nodes. The device's low 35 μVrms wideband noise (10 Hz–10 kHz) and 0.8 Ω typical dynamic impedance support high-resolution measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - sets precise bias point for 12-bit+ data converters and analog front-ends. |
| Initial Tolerance | ±1% (Grade D) at 25°C - corresponds to ±41 mV absolute error, suitable for industrial-grade instrumentation. |
| Temp Coefficient | ≤100 ppm/°C - contributes ≤±27 mV drift over −40°C to +85°C, enabling stable references in unregulated environments. |
| Operating Current | 68 μA to 15 mA - supports ultra-low-power sensor nodes and high-current buffer stages without redesign. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes quantization uncertainty in 16-bit ADC applications. |
| Dynamic Impedance | 0.3–1.1 Ω - ensures minimal voltage shift under varying load currents, critical for ratiometric sensor interfaces. |
| Thermal Hysteresis | 0.08% - limits voltage memory effect after thermal cycling, improving long-term repeatability in field-deployed gear. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-standard footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current path and output voltage node - connects to regulated rail; must sink full load + reference current. |
| Anode (Pin 2) | O | Ground reference terminal - ties to system ground; defines cathode-to-anode voltage drop. |
| NC (Pin 3) | - | No-connect terminal - must float or tie to anode per EMI mitigation guidance; not internally bonded in DBZ variant. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for decoupling; simplifies layout in dense PCBs and portable devices. |
| Stable with capacitive loads | Enables direct interface to ADC reference inputs, op-amp buffers, and switched-capacitor circuits without phase-margin risk. |
| Zener-zap voltage trim | Ensures ±1% initial accuracy at wafer level, reducing post-package calibration needs in production test flow. |
| Low 35 μVrms noise | Preserves effective number of bits (ENOB) in 16-bit data acquisition systems operating at DC–10 kHz bandwidth. |
| Wide 68 μA–15 mA operating range | Supports both battery-powered microcontrollers (low-IQ) and high-speed DAC drivers (high IOUT) with same part. |
Applications
| Industrial Data Acquisition | Automotive Sensor Interface |
|---|---|
|
Use Scenario: High-accuracy 4–20 mA transmitter with 16-bit DAC and isolated power supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V for DAC full-scale setting and current-loop scaling. Use Value: Enables 12-bit linearity over temperature without recalibration, meeting IEC 61000-4-2 immunity requirements. |
Use Scenario: Tire pressure monitoring system (TPMS) with MEMS pressure sensor and ultra-low-power MCU. IC Role / Device Role / Timing Role: Precision bias source for sensor bridge excitation and ADC reference in AEC-Q100 Grade 3 environment. Use Value: Delivers <±0.5% total error over −40°C to +85°C using only 68 μA quiescent current, extending battery life. |
| Energy Infrastructure Metering | Programmable Logic Controller (PLC) Analog Input |
|
Use Scenario: Revenue-grade electricity meter with polyphase voltage/current sampling and metrology SoC. IC Role / Device Role / Timing Role: Primary reference for 24-bit sigma-delta ADCs measuring grid voltage harmonics and RMS values. Use Value: 35 μVrms noise and 100 ppm/°C drift ensure Class 0.2 accuracy compliance across extended temperature ranges. |
Use Scenario: Modular PLC backplane with hot-swappable analog input modules supporting 4–20 mA and 0–10 V signals. IC Role / Device Role / Timing Role: Local reference for on-module 16-bit SAR ADCs, isolating channel-to-channel crosstalk. Use Value: SOT-23 footprint allows per-channel referencing without increasing module width; NC pin aids EMI suppression in noisy cabinets. |
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 | 4.096 V, ±0.5% (Grade C), 50 ppm/°C max, SOT-23-3, 75 μA min operating current | Higher initial accuracy and lower drift, but tighter min current requirement limits ultra-low-power use cases | Select when ±0.5% tolerance and <50 ppm/°C drift are mandatory; verify 75 μA minimum supply capability. |
| MAX6008AEUR+T | 4.096 V, ±0.2% (Grade A), 75 ppm/°C max, SOT-23-3, 60 μA min operating current | Better accuracy than LM4040DIM3-4.1/NOPB but higher cost and non-AEC-Q100 qualified | Prefer for commercial medical or test equipment where AEC-Q100 is unnecessary and 0.2% tolerance is required. |
Compared with TL4050C41IDBZR and MAX6008AEUR+T, the LM4040DIM3-4.1/NOPB offers the broadest operating current range (68 μA–15 mA) and automotive qualification (AEC-Q100 Grade 3), making it optimal for cost-sensitive industrial and automotive designs where ±1% tolerance is acceptable.
Availability
LM4040DIM3-4.1/NOPB is available at Aetrix Electronics and suitable for industrial data acquisition, automotive sensor interface, and energy infrastructure metering requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM4040DIM3-4.1/NOPB 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 automotive-qualified components.
The LM4040-N series was developed for space-constrained, high-stability analog systems-targeting industrial automation, automotive sensing, and energy metering where micropower operation and shunt topology simplify supply architecture.
FAQ
What is the minimum operating current for LM4040DIM3-4.1/NOPB?
The LM4040DIM3-4.1/NOPB requires a minimum operating current of 68 μA at 25°C to maintain regulation within specification. This value increases slightly over temperature, reaching 70 μA across the full −40°C to +85°C industrial range. Below this threshold, output voltage may deviate beyond the ±1% tolerance band.
Does LM4040DIM3-4.1/NOPB require an output capacitor?
No, the LM4040DIM3-4.1/NOPB does not require an output capacitor due to its internal compensation design. It remains stable with any capacitive load-including ADC reference inputs and op-amp feedback networks-eliminating the need for external stabilization components in most applications.
What is the function of Pin 3 (NC) on LM4040DIM3-4.1/NOPB?
Pin 3 on the LM4040DIM3-4.1/NOPB SOT-23 package is a no-connect terminal. It must be left floating or tied to the anode (Pin 2) to reduce EMI susceptibility in noisy environments such as motor drives or switch-mode power supplies-per TI's layout guidance in the datasheet.
Is LM4040DIM3-4.1/NOPB qualified for automotive use?
Yes, the LM4040DIM3-4.1/NOPB is AEC-Q100 Grade 3 qualified (−40°C to +85°C), making it suitable for non-critical automotive applications including body electronics, climate control sensors, and infotainment subsystems. It is not rated for Grade 1 (125°C) operation.
How does the temperature coefficient affect LM4040DIM3-4.1/NOPB accuracy over temperature?
The LM4040DIM3-4.1/NOPB has a maximum temperature coefficient of 100 ppm/°C. Over the −40°C to +85°C range (ΔT = 125°C), this contributes up to ±12.7 mV (0.31%) additional error beyond its ±41 mV (±1%) initial tolerance-resulting in a worst-case total error of ±53.7 mV (±1.31%) at temperature extremes.
LM4040DIM3-4.1/NOPB 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):
- 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:
- 78 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DIM3-4.1/NOPB FAQ
1.How can I place an order for LM4040DIM3-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIM3-4.1/NOPB 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 LM4040DIM3-4.1/NOPB reliable?
The price and inventory of LM4040DIM3-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIM3-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DIM3-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIM3-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIM3-4.1/NOPB?
LM4040DIM3-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIM3-4.1/NOPB 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 LM4040DIM3-4.1/NOPB?
For technical support, including LM4040DIM3-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIM3-4.1/NOPB requirements.
6.How does Aetrix verify that LM4040DIM3-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DIM3-4.1/NOPB 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 LM4040DIM3-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DIM3-4.1/NOPB?
All LM4040DIM3-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIM3-4.1/NOPB, 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 LM4040DIM3-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4040DIM3-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DIM3-4.1/NOPB Tags
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