My Inquiry
My Account
Texas Instruments LM4040D41IDBZRG4
- Part No.:
- LM4040D41IDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040D41IDBZRG4.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,750
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040D41IDBZRG4 from Texas Instruments is a precision micropower shunt voltage reference with 4.096 V nominal output, ±1.0% initial accuracy (D grade), 150 ppm/°C temperature coefficient, 35 μVRMS wideband noise, and stable operation from 45 μA to 15 mA cathode current. It serves as a compact, capacitor-free reference in high-accuracy analog signal chains for industrial sensing and data acquisition.
For engineers reviewing the LM4040D41IDBZRG4 datasheet, LM4040D41IDBZRG4 pinout, LM4040D41IDBZRG4 application, or LM4040D41IDBZRG4 equivalent, key selection criteria include its D-grade tolerance over –40°C to 85°C, SOT-23-3 (DBZ) package compatibility, low-noise performance at microamp bias, and absence of required output capacitance.
Technical Context
The LM4040D41IDBZRG4 operates as a two-terminal shunt reference, sinking cathode current (IZ) to regulate voltage across its terminals. Its Zener-based architecture uses wafer-level fuse and Zener-zap trimming to achieve fixed 4.096 V output with D-grade (±1.0%) initial accuracy and 150 ppm/°C max temperature coefficient over –40°C to 85°C.
It maintains stability with all capacitive loads-including no external capacitor-due to low dynamic impedance (≤1.1 Ω at 1 mA) and exhibits 35 μVRMS noise (10 Hz–10 kHz) at 100 μA bias. Long-term stability is 120 ppm after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; enables precise 12-bit ADC full-scale reference when paired with 4.096 V rail |
| Initial Accuracy | ±1.0% max at 25°C; defines worst-case DC offset in calibration-critical systems |
| Temp Coefficient | 150 ppm/°C max; contributes ≤±0.52% error over –40°C to 85°C ambient range |
| Noise (10Hz–10kHz) | 35 μVRMS typical; supports <16-bit ENOB in low-frequency precision measurement |
| Min Cathode Current | 45 μA typical; allows ultra-low-power operation in battery-powered sensor nodes |
| Dynamic Impedance | ≤1.1 Ω at 1 mA; ensures minimal load-induced voltage shift in varying-current applications |
| Operating Temp Range | –40°C to +85°C; qualified for industrial-grade embedded control and field instrumentation |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm footprint, surface-mount, thermally efficient with RθJA = 206°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage regulation node | Connected to supply rail; sinks current to maintain 4.096 V across anode–cathode |
| Anode (Pin 2) | Common reference terminal / ground return | Typically tied to system ground; forms reference potential for output voltage measurement |
| NC (Pin 3) | No internal connection | Must be left floating or tied to anode per EMI mitigation guidance in high-noise environments |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free operation | Stable with any capacitive load; eliminates BOM cost and layout area for output capacitor |
| Micropower startup | 45 μA typical minimum cathode current enables use in energy-harvesting and coin-cell systems |
| Low thermal hysteresis | 0.08% max; minimizes repeatability error after thermal cycling in field-deployed equipment |
| High ESD robustness | ±2000 V HBM rating; withstands handling and board assembly without protection circuitry |
| Long-term stability | 120 ppm drift after 1000 h; reduces need for periodic recalibration in maintenance-sensitive systems |
Applications
| Industrial Data-Acquisition Systems | Energy Infrastructure Monitoring |
|---|---|
Use Scenario: High-resolution voltage measurement in PLC analog input modules with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Provides stable 4.096 V reference for ADC full-scale range, directly determining measurement resolution and absolute accuracy. Use Value: Enables ±0.5 LSB total unadjusted error (TUE) budget by contributing only ±41 mV (±1.0%) initial error and low noise floor. | Use Scenario: Battery voltage supervision and grid-sensor calibration in smart meters and RTUs. IC Role / Device Role / Timing Role: Serves as primary reference for isolated voltage sensing and metrology-grade current shunt amplifiers. Use Value: Maintains accuracy over –40°C to 85°C ambient and 10+ year field life with <120 ppm long-term drift. |
| Analog Input Modules | Field Transmitters |
Use Scenario: Modular I/O cards requiring multiple precision references per channel for ratiometric sensor excitation and readback. IC Role / Device Role / Timing Role: Delivers consistent 4.096 V reference across channels with matched tempco and noise behavior. Use Value: Eliminates inter-channel gain mismatch caused by reference variation; supports channel-to-channel crosstalk < –100 dB. | Use Scenario: 4–20 mA loop-powered transmitters measuring pressure, temperature, or flow in hazardous areas. IC Role / Device Role / Timing Role: Supplies regulated reference for DAC output scaling and sensor signal conditioning under tight power budgets. Use Value: Operates reliably at 45 μA min current, enabling full functionality even at lowest loop current (4 mA). |
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 4.096 V output, ±0.5% initial accuracy (C grade), 100 ppm/°C tempco, SOT-23-3 package | Better accuracy and tempco; requires higher min cathode current (60 μA typical) | Select when tighter DC specs are prioritized over ultra-low-power operation |
| REF3040AIDBZR | 4.096 V output, ±0.2% initial accuracy, 50 ppm/°C tempco, but series topology (3-pin, higher quiescent current) | Higher accuracy and lower tempco, but requires external bypass capacitor and consumes >40 μA supply current | Select when system layout allows series-reference constraints and sub-100 ppm/°C stability is mandatory |
Compared with TL4050C41IDBZR and REF3040AIDBZR, the LM4040D41IDBZRG4 trades initial accuracy and tempco for micropower operation and capacitor-free simplicity-making it optimal for cost-sensitive, space-constrained, and battery-operated industrial sensors where ±1% tolerance is acceptable.
Availability
LM4040D41IDBZRG4 is available at Aetrix Electronics and suitable for industrial data-acquisition systems, energy infrastructure monitoring, and field transmitter designs requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040D41IDBZRG4 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 family was designed for high-accuracy, low-power shunt reference applications in industrial, automotive, and instrumentation systems-emphasizing ease of use, stability, and broad operating conditions.
FAQ
What is the output voltage tolerance of the LM4040D41IDBZRG4 over temperature?
The LM4040D41IDBZRG4 has ±1.0% initial accuracy at 25°C and a maximum temperature coefficient of 150 ppm/°C. Over the full –40°C to +85°C industrial range, its total output voltage tolerance is ±1.98%, calculated as ±1.0% ± (150 ppm/°C × 65°C). This value is confirmed in Section 6.15 of the TI datasheet for LM4040D41I.
Does the LM4040D41IDBZRG4 require an external output capacitor?
No, the LM4040D41IDBZRG4 is stable with all capacitive loads and does not require an external output capacitor. Its design eliminates the need for such components, reducing BOM count and PCB area-confirmed in the "Features" and "Description" sections of the official TI datasheet.
What is the minimum cathode current needed for regulation in the LM4040D41IDBZRG4?
The LM4040D41IDBZRG4 requires a minimum cathode current of 45 μA (typical) to maintain regulation. At 25°C, the datasheet specifies 45–75 μA typical range; over –40°C to +85°C, this increases to 80 μA maximum. This ultra-low requirement supports micropower and energy-harvesting applications.
How does the LM4040D41IDBZRG4 compare to the A-grade version of the same device?
The LM4040D41IDBZRG4 (D grade) offers ±1.0% initial accuracy and 150 ppm/°C tempco, while the A-grade LM4040A41IDBZRG4 provides ±0.1% accuracy and 100 ppm/°C tempco. Both share identical 4.096 V output, SOT-23-3 package, noise (35 μVRMS), and operating current range-making them drop-in replacements where accuracy requirements differ.
Is the LM4040D41IDBZRG4 suitable for automotive applications?
The LM4040D41IDBZRG4 is rated for –40°C to +85°C (industrial grade), not the extended –40°C to +125°C required for most automotive under-hood applications. For automotive use, TI recommends the Q-grade variants (e.g., LM4040D41QDBZR), which are explicitly characterized and qualified for the full automotive temperature range.
LM4040D41IDBZRG4 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):
- 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
LM4040D41IDBZRG4 FAQ
1.How can I place an order for LM4040D41IDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040D41IDBZRG4 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 LM4040D41IDBZRG4 reliable?
The price and inventory of LM4040D41IDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040D41IDBZRG4 is usually 5 days.
3.What payment methods are accepted for LM4040D41IDBZRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040D41IDBZRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040D41IDBZRG4?
LM4040D41IDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040D41IDBZRG4 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 LM4040D41IDBZRG4?
For technical support, including LM4040D41IDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040D41IDBZRG4 requirements.
6.How does Aetrix verify that LM4040D41IDBZRG4 is sourced from the original manufacturer or authorized distributors?
All LM4040D41IDBZRG4 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 LM4040D41IDBZRG4 meets industry standards.
7.What is the process for return or replacement of LM4040D41IDBZRG4?
All LM4040D41IDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040D41IDBZRG4, 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 LM4040D41IDBZRG4 part is unused and in its original packaging.
Return procedure for LM4040D41IDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040D41IDBZRG4 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…
