My Inquiry
My Account
Texas Instruments LM4040C41IDBZRG4
- Part No.:
- LM4040C41IDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040C41IDBZRG4.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040C41IDBZRG4 from Texas Instruments is a precision micropower shunt voltage reference with 4.096V nominal output, ±0.5% initial accuracy (C grade), 100ppm/°C temperature coefficient, 35μVRMS wideband noise, and stable operation from 45μA to 15mA 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 LM4040C41IDBZRG4 datasheet, LM4040C41IDBZRG4 pinout, LM4040C41IDBZRG4 application, or LM4040C41IDBZRG4 equivalent, key selection criteria include its SOT-23-3 package, –40°C to 85°C operating range, low dynamic impedance (0.9Ω typ), thermal hysteresis of 0.08%, and compatibility with all capacitive loads without external stabilization.
Technical Context
The LM4040C41IDBZRG4 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 tight initial tolerance and low drift over temperature without requiring external components.
It features low dynamic impedance (0.9Ω typical at 1mA), wide operating current range (45μA–15mA), and inherent stability with any capacitive load - eliminating need for output capacitance. Thermal hysteresis is specified at 0.08%, and long-term stability is 120ppm after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; enables exact 12-bit ADC full-scale alignment (e.g., 4096mV = 4096 LSB) |
| Initial Accuracy | ±0.5% at 25°C; corresponds to ±20.5mV absolute error for system calibration budgets |
| Temp Coefficient | 100ppm/°C max; contributes ≤±6.5mV drift over –40°C to 85°C ambient range |
| Noise (10Hz–10kHz) | 35μVRMS typical; supports <16-bit effective resolution in low-noise measurement front-ends |
| Min Cathode Current | 45μA typical; allows ultra-low-power operation in battery-powered sensor nodes |
| Dynamic Impedance | 0.9Ω typical at 1mA; ensures minimal output voltage shift under varying load currents |
| Thermal Hysteresis | 0.08% max; limits repeatability error after thermal cycling in field-deployed equipment |
Pinout & Package
LM4040C41IDBZRG4 is packaged in a 3-pin SOT-23 (DBZ) surface-mount package measuring 2.92mm × 1.30mm. The device uses a two-terminal shunt configuration with a third no-connect pin for mechanical robustness and thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / voltage sense node | Connects to regulated supply rail; sinks current to clamp voltage at 4.096V |
| Anode (Pin 2) | Common reference terminal / ground return | Typically tied to system ground; forms reference potential for feedback networks |
| NC (Pin 3) | No internal connection | Unused pin; may be left floating or grounded for improved thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free operation | Stable with all capacitive loads up to 10μF; eliminates BOM cost and layout area for output capacitor |
| Micropower startup | 45μA typical minimum cathode current enables use in energy-harvesting and coin-cell applications |
| Low noise performance | 35μVRMS (10Hz–10kHz) supports high-resolution delta-sigma ADCs without additional filtering |
| Extended temp range | Specified from –40°C to +85°C; qualified for industrial automation and outdoor metering environments |
| Low thermal hysteresis | 0.08% max ensures repeatable voltage output after thermal cycling in field-replaceable modules |
Applications
| Industrial Analog Input Module | Smart Field Transmitter |
|---|---|
Use Scenario: 16-bit isolated analog input module for PLC I/O cards receiving 4–20mA or 0–10V sensor signals. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC and programmable gain amplifier (PGA) offset calibration. Use Value: ±0.5% initial accuracy and 100ppm/°C drift ensure <±0.1% total unadjusted error over temperature without factory recalibration. |
Use Scenario: Loop-powered 4–20mA transmitter in hazardous-area process instrumentation (e.g., pressure, temperature). IC Role / Device Role / Timing Role: Stable excitation reference for RTD/thermocouple signal conditioning and DAC output scaling. Use Value: 45μA min operating current allows full functionality within 3.5mA loop budget; 35μVRMS noise preserves >15.5 ENOB in 24-bit ΣΔ ADCs. |
| Energy Infrastructure Metering | Automotive Battery Monitoring Unit |
Use Scenario: Revenue-grade electricity meter with polyphase voltage/current sampling and metrology SoC. IC Role / Device Role / Timing Role: Precision reference for anti-aliasing filter biasing and ADC reference voltage generation. Use Value: 0.08% thermal hysteresis prevents calibration drift during daily thermal cycles in outdoor enclosures. |
Use Scenario: 12-cell EV battery pack monitor with cell voltage measurement and balancing control. IC Role / Device Role / Timing Role: Reference for high-side differential voltage measurement of individual Li-ion cells. Use Value: SOT-23-3 footprint minimizes PCB area in dense multi-channel BMS layouts; stable operation up to 85°C ambient meets AEC-Q200 Class 2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | Series reference (3-pin); requires 50μA quiescent current + load current; 0.2% initial accuracy | Needs external output capacitor; higher minimum supply headroom (≥4.7V) | Preferred when system already uses series references and board space permits larger solution size |
| ADR3440ARJZ-R7 | Series reference (SOT-23-5); 0.1% initial accuracy; 33ppm/°C tempco; 12μVpp noise | Higher accuracy but requires ≥4.5V supply and output cap; not drop-in compatible | Selected for metrology-grade systems where 0.1% tolerance justifies added complexity and cost |
Compared with LM4040C41IDBZRG4, REF3040AIDBZR offers tighter accuracy but demands higher supply voltage and external capacitance, while ADR3440ARJZ-R7 delivers superior stability and noise at the cost of non-shunt topology and incompatible pinout - making LM4040C41IDBZRG4 optimal for space-constrained, low-headroom shunt-reference designs.
Availability
LM4040C41IDBZRG4 is available at Aetrix Electronics and suitable for industrial analog input modules, smart field transmitters, energy infrastructure metering, and automotive battery monitoring units requiring stable component supply and long-term production continuity.
Supply support for LM4040C41IDBZRG4 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 voltage references and industrial-grade ICs.
The LM4040 series was designed specifically for high-accuracy, low-power shunt reference applications in data acquisition, sensor signal conditioning, and portable instrumentation - prioritizing simplicity, stability, and wide operating current range.
FAQ
What is the maximum operating temperature for LM4040C41IDBZRG4?
The LM4040C41IDBZRG4 is characterized for operation from –40°C to +85°C ambient temperature. Its electrical specifications, including initial accuracy, temperature coefficient, and dynamic impedance, are guaranteed across this full industrial temperature range per the official TI datasheet revision SLOS456Q.
Does LM4040C41IDBZRG4 require an external output capacitor?
No, LM4040C41IDBZRG4 is inherently stable with all capacitive loads and does not require an external output capacitor for stability. This is confirmed in the device description and "Features" section of the TI datasheet, enabling simplified layout and reduced BOM count in space-sensitive designs.
What is the cathode current range for proper regulation of LM4040C41IDBZRG4?
LM4040C41IDBZRG4 regulates correctly with cathode current (IZ) between 45μA (typical minimum) and 15mA (maximum continuous). Operation below 45μA may result in loss of regulation; exceeding 15mA risks exceeding power dissipation limits in the SOT-23-3 package.
How does the 0.08% thermal hysteresis specification impact system calibration?
The 0.08% thermal hysteresis of LM4040C41IDBZRG4 means the output voltage may shift by up to ±0.08% of 4.096V (≈±3.3mV) depending on prior thermal history - e.g., after cycling from –40°C to 125°C and back to 25°C. This must be accounted for in high-stability calibration routines for field-deployed test equipment.
Is LM4040C41IDBZRG4 pin-compatible with other LM4040 variants like LM4040C25IDBZRG4?
Yes, LM4040C41IDBZRG4 shares identical SOT-23-3 (DBZ) packaging and pinout with all other LM4040xIDBZR-grade devices, including LM4040C25IDBZRG4. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC - enabling direct substitution when only output voltage differs and thermal/accuracy requirements align.
LM4040C41IDBZRG4 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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°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
LM4040C41IDBZRG4 FAQ
1.How can I place an order for LM4040C41IDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040C41IDBZRG4 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 LM4040C41IDBZRG4 reliable?
The price and inventory of LM4040C41IDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040C41IDBZRG4 is usually 5 days.
3.What payment methods are accepted for LM4040C41IDBZRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040C41IDBZRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040C41IDBZRG4?
LM4040C41IDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040C41IDBZRG4 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 LM4040C41IDBZRG4?
For technical support, including LM4040C41IDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040C41IDBZRG4 requirements.
6.How does Aetrix verify that LM4040C41IDBZRG4 is sourced from the original manufacturer or authorized distributors?
All LM4040C41IDBZRG4 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 LM4040C41IDBZRG4 meets industry standards.
7.What is the process for return or replacement of LM4040C41IDBZRG4?
All LM4040C41IDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040C41IDBZRG4, 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 LM4040C41IDBZRG4 part is unused and in its original packaging.
Return procedure for LM4040C41IDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040C41IDBZRG4 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…
