My Inquiry
My Account
Texas Instruments LM4040B30IDBZR
- Part No.:
- LM4040B30IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040B30IDBZR.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,498
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040B30IDBZR from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 3.0V output with ±0.2% initial accuracy (B 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 field transmitters requiring low-drift, low-noise biasing.
For engineers reviewing the LM4040B30IDBZR datasheet, LM4040B30IDBZR pinout, LM4040B30IDBZR application, or LM4040B30IDBZR equivalent, this page provides verified specifications, SOT-23-3 pin mapping, real-world use cases in energy infrastructure and automotive electronics, and validated alternative parts for design flexibility and supply continuity.
Technical Context
The LM4040B30IDBZR operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 3.0V reverse breakdown voltage across its terminals. Its Zener-zap trimmed silicon junction ensures tight initial tolerance and low thermal hysteresis (0.08%), while dynamic impedance remains below 0.9Ω at 1mA test current.
Designed for industrial temperature range (–40°C to +85°C), it achieves stable regulation without external capacitors and supports all capacitive loads - enabling direct integration into compact, battery-powered data-acquisition systems where layout simplicity and long-term drift (<120ppm after 1000h) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V nominal; enables accurate scaling of 12-bit+ ADCs in sensor front-ends |
| Initial Accuracy | ±0.2% max at 25°C; reduces calibration burden in factory-trimmed systems |
| Temp Coefficient | 100ppm/°C max; contributes ≤±6.5mV drift over –40°C to +85°C |
| Noise (10Hz–10kHz) | 35μVRMS typical; preserves SNR in precision instrumentation amplifiers |
| Min Cathode Current | 47μA typical; supports ultra-low-power wake-up circuits and energy-harvesting nodes |
| Dynamic Impedance | 0.9Ω max at 1mA; maintains regulation under fast load transients |
| Long-Term Stability | 120ppm after 1000h; ensures <0.012% output shift over 1-year field deployment |
Pinout & Package
LM4040B30IDBZR is packaged in a 3-pin SOT-23 (DBZ) case measuring 2.92mm × 1.30mm, optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current/voltage input | Connected to regulated node; sinks current to maintain 3.0V reference |
| Anode (Pin 2) | Common ground reference | Typically tied to system ground; defines return path for cathode current |
| NC (Pin 3) | No internal connection | Must float or be connected to anode per EMI mitigation guidance |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output capacitor - simplifies BOM and layout in space-limited designs |
| Wide operating current range | 47μA to 15mA operation enables use from nano-power sleep modes to active signal conditioning |
| Low temperature hysteresis | 0.08% max ensures repeatable voltage after thermal cycling - critical for field-deployed sensors |
| Extended temperature rating | Specified from –40°C to +85°C - qualified for industrial and automotive under-hood environments |
| Low dynamic impedance | Sub-1Ω impedance minimizes load-induced voltage droop during transient events |
Applications
| Industrial Analog Input Module | Energy Infrastructure Metering |
|---|---|
Use Scenario: High-resolution current/voltage sensing in programmable logic controller (PLC) analog input cards. IC Role / Device Role / Timing Role: Provides stable 3.0V reference for 16-bit SAR ADCs and isolated signal conditioners. Use Value: ±0.2% initial accuracy and 100ppm/°C TC ensure <0.1% total measurement error across full industrial temperature range. | Use Scenario: Precision voltage scaling in smart electricity meters compliant with IEC 62053. IC Role / Device Role / Timing Role: Supplies reference for metrology-grade ADCs measuring grid voltage and current harmonics. Use Value: 35μVRMS noise and 120ppm long-term stability meet Class 0.2 meter accuracy requirements over 10-year service life. |
| Automotive Field Transmitter | Portable Data-Acquisition System |
Use Scenario: 4–20mA loop-powered pressure/temperature transmitter in engine bay or chassis applications. IC Role / Device Role / Timing Role: Sets precision bias point for current-output DAC and op-amp feedback network. Use Value: Stable 3.0V output under 47μA–15mA cathode current enables reliable operation across full loop compliance range and ambient extremes. | Use Scenario: Battery-operated handheld multimeter or environmental sensor logger. IC Role / Device Role / Timing Role: Reference source for low-power microcontroller-integrated ADC during periodic sampling. Use Value: 47μA minimum current allows >1-year battery life on coin cell while maintaining ±0.2% accuracy without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C30IDBZR | ±0.5% initial accuracy, same 3.0V output and SOT-23 package | Lower cost for non-critical applications where 0.2% is not required | Select when budget constraints outweigh need for tight initial tolerance |
| REF3030AIDBZR | 3.0V series reference; 50ppm/°C TC, 25μVRMS noise, requires input voltage ≥4.3V | Higher accuracy and lower noise, but needs higher supply and external bypass cap | Choose for ultra-low-noise systems where board space permits series topology |
Compared with LM4040C30IDBZR, the LM4040B30IDBZR delivers twice the initial accuracy at minimal cost premium; versus REF3030AIDBZR, it offers simpler two-terminal operation and lower minimum current, trading off 10μVRMS noise and 50ppm/°C TC for robustness in low-voltage, capacitor-free designs.
Availability
LM4040B30IDBZR is available at Aetrix Electronics and suitable for industrial analog input modules, energy infrastructure metering, and automotive field transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4040B30IDBZR 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-reliability manufacturing.
The LM4040 series belongs to TI's precision voltage reference product line, engineered specifically for applications demanding low drift, low noise, and micropower operation in harsh industrial and automotive environments.
FAQ
What is the output voltage tolerance of LM4040B30IDBZR at 25°C?
The LM4040B30IDBZR has a maximum initial output voltage tolerance of ±0.2% at 25°C, corresponding to ±6mV around its nominal 3.0V output. This specification is guaranteed per TI's electrical characteristics table for the B-grade industrial-temperature variant, and applies under 100μA cathode current test conditions.
Does LM4040B30IDBZR require an external output capacitor?
No, LM4040B30IDBZR does not require an external output capacitor. It is explicitly designed to remain stable with all capacitive loads - including direct connection to ADC reference inputs or op-amp feedback networks - eliminating the need for added capacitance and simplifying layout in space-constrained designs.
What is the minimum cathode current needed for regulation in LM4040B30IDBZR?
The LM4040B30IDBZR requires a minimum cathode current of 47μA (typical) to maintain regulation at 25°C, rising to 82μA across the full –40°C to +85°C industrial temperature range. This ultra-low current enables use in battery-powered and energy-harvesting applications where standby power must be minimized.
Can LM4040B30IDBZR operate in automotive under-hood environments?
LM4040B30IDBZR is rated for –40°C to +85°C operation and meets industrial temperature requirements, but is not AEC-Q200 qualified for automotive under-hood use. For such environments, TI offers the Q-grade variant LM4040B30QDBZR, which extends operation to +125°C and undergoes additional stress testing for automotive reliability.
How does the noise performance of LM4040B30IDBZR compare to series references?
LM4040B30IDBZR delivers 35μVRMS wideband noise (10Hz–10kHz), which is competitive with many low-cost series references. While some premium series references achieve 20–25μVRMS, the LM4040B30IDBZR's noise is sufficient for 16-bit ADC applications and avoids the supply headroom and capacitor dependencies inherent in series topologies.
LM4040B30IDBZR 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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
LM4040B30IDBZR FAQ
1.How can I place an order for LM4040B30IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040B30IDBZR 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 LM4040B30IDBZR reliable?
The price and inventory of LM4040B30IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040B30IDBZR is usually 5 days.
3.What payment methods are accepted for LM4040B30IDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040B30IDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040B30IDBZR?
LM4040B30IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040B30IDBZR 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 LM4040B30IDBZR?
For technical support, including LM4040B30IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040B30IDBZR requirements.
6.How does Aetrix verify that LM4040B30IDBZR is sourced from the original manufacturer or authorized distributors?
All LM4040B30IDBZR 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 LM4040B30IDBZR meets industry standards.
7.What is the process for return or replacement of LM4040B30IDBZR?
All LM4040B30IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4040B30IDBZR, 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 LM4040B30IDBZR part is unused and in its original packaging.
Return procedure for LM4040B30IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040B30IDBZR 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…
