My Inquiry
My Account
Texas Instruments LM4040D30QDBZRG4
- Part No.:
- LM4040D30QDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040D30QDBZRG4.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,265
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040D30QDBZRG4 from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 3.0V output with ±1.0% initial accuracy (D grade), 150ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from –40°C to 125°C. It requires only 45μA minimum cathode current and supports data-acquisition systems where low drift and high thermal stability are critical.
For engineers reviewing the LM4040D30QDBZRG4 datasheet, LM4040D30QDBZRG4 pinout, LM4040D30QDBZRG4 application, or LM4040D30QDBZRG4 equivalent, this page provides verified specifications, SOT-23-3 pin mapping, thermal hysteresis (0.08%), dynamic impedance (≤1.2Ω), and validated alternatives for industrial and automotive voltage reference design.
Technical Context
The LM4040D30QDBZRG4 operates as a two-terminal shunt reference, sinking cathode current (IZ) to maintain a stable 3.0V reverse breakdown voltage across its cathode-anode terminals. Its Zener-zap trimmed silicon die achieves D-grade tolerance via wafer-sort fuse programming, with no external capacitor required for stability-even under full capacitive loading.
It features low dynamic impedance (≤1.2Ω at 1mA), low thermal hysteresis (0.08%), and long-term stability of 120ppm over 1000 hours. Designed for extended temperature operation (–40°C to 125°C), it maintains specified performance without derating across its full operating current range (45μA to 15mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal; enables direct interface with 3V ADC references and analog front-ends without scaling. |
| Initial Accuracy | ±1.0% max at 25°C; defines worst-case DC offset in precision sensor signal chains. |
| Temp Coefficient | 150ppm/°C max; contributes ≤±0.3% error over –40°C to 125°C ambient range. |
| Noise (10Hz–10kHz) | 35μVRMS typical; minimizes added uncertainty in 16-bit+ data acquisition systems. |
| Min Cathode Current | 45μA typical; allows ultra-low-power operation in battery-backed monitoring circuits. |
| Dynamic Impedance | ≤1.2Ω at 1mA; ensures <1mV output shift under 1mA load transients. |
| Thermal Hysteresis | 0.08% max; limits repeatability error after thermal cycling in field-deployed equipment. |
Pinout & Package
LM4040D30QDBZRG4 is packaged in a 3-pin SOT-23 (DBZ) surface-mount package measuring 2.92mm × 1.30mm. The device uses a two-terminal shunt topology with an optional third terminal for EMI mitigation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connected to regulated supply rail; sinks all excess current to maintain 3.0V across anode-cathode. |
| Anode (Pin 2) | Common reference return | Typically tied to system ground; forms the 3.0V reference potential relative to this node. |
| NC (Pin 3) | No internal connection | Must float or be connected to anode per TI recommendation in high-EMI environments (e.g., near switching regulators). |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output capacitor-reduces BOM count and PCB area in space-constrained modules. |
| Extended temperature range | –40°C to 125°C operation enables use in under-hood automotive and industrial motor control applications. |
| Low micropower consumption | 45μA minimum cathode current supports >10-year battery life in wireless sensor nodes. |
| Low wideband noise | 35μVRMS (10Hz–10kHz) preserves SNR in high-resolution analog-to-digital conversion paths. |
| Zener-zap voltage trim | Ensures tight 3.0V output matching across production lots without post-package calibration. |
Applications
| Data-Acquisition Systems | Energy Infrastructure |
|---|---|
Use Scenario: High-accuracy current/voltage sensing in smart metering and grid monitoring units. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for 24-bit delta-sigma ADCs and isolation amplifier biasing. Use Value: Enables ±0.1% energy measurement accuracy over temperature with <0.08% thermal hysteresis. | Use Scenario: Voltage supervision and calibration in solar inverter DC-link monitoring. IC Role / Device Role / Timing Role: Shunt reference for isolated feedback loops and auxiliary power supply regulation. Use Value: Maintains 3.0V stability across –40°C to 125°C ambient, supporting IP65-rated outdoor enclosures. |
| Analog Input Module | Field Transmitters |
Use Scenario: Modular I/O cards for PLCs requiring multi-channel 4–20mA loop-powered analog inputs. IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and sensor excitation circuitry. Use Value: Delivers 3.0V with ≤1.2Ω dynamic impedance, minimizing gain error during fast step-load transitions. | Use Scenario: Two-wire 4–20mA temperature/pressure transmitters deployed in oil & gas refineries. IC Role / Device Role / Timing Role: Primary voltage reference for signal conditioning and microcontroller ADC reference. Use Value: 150ppm/°C tempco and 120ppm long-term stability ensure calibration holdover for >12 months between field servicing. |
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 | 3.0V, ±0.5% initial accuracy, 100ppm/°C, SOT-23-3, 60μA min current | Better accuracy & tempco but higher min current; less suitable for ultra-low-power designs | Select when tighter DC specs outweigh micropower requirements. |
| MAX6003EUR+T | 3.0V, ±0.5% initial accuracy, 75ppm/°C, SOT-23-3, 65μA min current, 25μVRMS noise | Lower noise and tempco, but not qualified for 125°C operation; limited automotive qualification | Prefer for commercial-temp, low-noise instrumentation where extended temp range is unnecessary. |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040D30QDBZRG4 trades initial accuracy and noise for guaranteed operation up to 125°C and lower minimum cathode current-making it optimal for thermally demanding, battery-sensitive industrial field devices.
Availability
LM4040D30QDBZRG4 is available at Aetrix Electronics and suitable for data-acquisition systems, energy infrastructure monitoring, and field transmitter designs requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4040D30QDBZRG4 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 specifically for high-stability, low-power shunt voltage reference applications in industrial automation, automotive subsystems, and precision measurement equipment.
FAQ
What is the maximum operating temperature for LM4040D30QDBZRG4?
The LM4040D30QDBZRG4 is characterized for continuous operation from –40°C to +125°C ambient temperature, meeting extended temperature requirements for under-hood automotive and industrial control applications. Its electrical specifications-including 3.0V output, ±1.0% accuracy, and 150ppm/°C tempco-are guaranteed across this full range per TI's LM4040D30QDBZRG4 datasheet Section 6.13.
Does LM4040D30QDBZRG4 require an output capacitor?
No, the LM4040D30QDBZRG4 is inherently stable with all capacitive loads and does not require an external output capacitor for proper operation. This is confirmed in the official TI datasheet Section 3 ("Description") and Section 8.2 ("Typical Applications"), enabling simplified layout and reduced component count in compact designs.
What is the minimum cathode current needed for LM4040D30QDBZRG4 to regulate properly?
The LM4040D30QDBZRG4 requires a minimum cathode current of 45μA (typical) to maintain regulation at 3.0V. At 25°C, the datasheet specifies 45μA to 77μA depending on unit variation; full-range specification is 82μA max. This ultra-low requirement supports micropower applications such as battery-operated sensors and energy-harvesting systems.
How does the NC pin (Pin 3) function on LM4040D30QDBZRG4?
Pin 3 of the LM4040D30QDBZRG4 is a no-connect (NC) terminal with no internal connection. TI recommends leaving it floating or connecting it directly to the anode (Pin 2) in high-EMI environments-such as near switching power supplies or motor drivers-to reduce noise coupling into the reference node, as stated in datasheet Figure 5-1 and Table 5-1.
Is LM4040D30QDBZRG4 RoHS-compliant and lead-free?
Yes, LM4040D30QDBZRG4 is RoHS-compliant and lead-free. The "G4" suffix in the part number denotes TI's green packaging standard, confirming compliance with EU RoHS Directive 2011/65/EU and JEDEC JS-001 ESD requirements. Full material declarations and compliance documentation are available via TI's Quality & Environmental Information portal.
LM4040D30QDBZRG4 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:
- ±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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040D30QDBZRG4 FAQ
1.How can I place an order for LM4040D30QDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D30QDBZRG4 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 LM4040D30QDBZRG4 reliable?
The price and inventory of LM4040D30QDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D30QDBZRG4 is usually 5 days.
3.What payment methods are accepted for LM4040D30QDBZRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D30QDBZRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040D30QDBZRG4?
LM4040D30QDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D30QDBZRG4 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 LM4040D30QDBZRG4?
For technical support, including LM4040D30QDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D30QDBZRG4 requirements.
6.How does Aetrix verify that LM4040D30QDBZRG4 is sourced from the original manufacturer or authorized distributors?
All LM4040D30QDBZRG4 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 LM4040D30QDBZRG4 meets industry standards.
7.What is the process for return or replacement of LM4040D30QDBZRG4?
All LM4040D30QDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D30QDBZRG4, 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 LM4040D30QDBZRG4 part is unused and in its original packaging.
Return procedure for LM4040D30QDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040D30QDBZRG4 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
