My Inquiry
My Account
Texas Instruments LM4041CQDBZR
- Part No.:
- LM4041CQDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CQDBZR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,420
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4041CQDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise. It operates from 45 μA to 12 mA cathode current and is qualified for automotive-grade extended temperature range (–40°C to 125°C). It serves as a stable reference in high-accuracy ADC biasing and battery-monitoring circuits.
For engineers reviewing the LM4041CQDBZR datasheet, LM4041CQDBZR pinout, LM4041CQDBZR application, or LM4041CQDBZR equivalent, this page delivers verified specifications, validated SOT-23-3 pin functions, confirmed automotive-temperature operation, and two rigorously cross-checked alternative parts - all aligned to TI's SLCS146H revision March 2025 production data.
Technical Context
The LM4041CQDBZR implements a Zener-based shunt architecture with fuse/Zener-zap trimming at wafer sort to achieve ±0.5% output tolerance. Its internal feedback loop maintains regulation across cathode currents from 45 μA to 12 mA without requiring external capacitors, and its low dynamic impedance (≤1.5 Ω at 1 mA) ensures stability under varying load conditions.
Designed for automotive applications, the Q-grade variant undergoes full characterization from –40°C to 125°C ambient, with guaranteed long-term stability of ≤120 ppm after 1000 hours and ESD robustness of ±2000 V HBM on all pins except FB (±1000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references without resistor network redesign. |
| Initial Tolerance | ±0.5% at 25°C (C grade); supports 12-bit ADC systems requiring ≤2 LSB error at full scale. |
| Temp Coefficient | Max 100 ppm/°C over –40°C to 125°C; contributes ≤0.125% output drift across full automotive temperature range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; adds <0.002% RMS error to 1 V reference, critical for precision sensor signal chains. |
| Operating Current | 45 μA (min) to 12 mA (max); allows ultra-low-power wake-up monitoring and high-current reference buffering in same design. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; minimizes output voltage shift under fast load transients in power-supply monitor circuits. |
| ESD Rating | ±2000 V HBM (all pins except FB); meets AEC-Q100 stress test requirements for automotive PCB handling. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount footprint with gull-wing leads, JEDEC MO-178 compliant, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink and output node | Connects to regulated voltage rail; carries total current (load + reference bias); must be driven above 1.225 V via series resistor. |
| Anode (Pin 2) | Reference ground reference | Typically tied to system ground; forms return path for cathode current; floating anode disables regulation. |
| NC (Pin 3) | No-connect terminal | Must remain unconnected or tied to Anode (Pin 2); internal Schottky diode between Pins 2–3 prevents reverse conduction if miswired. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load (0–∞), eliminating need for output bypass capacitor and reducing BOM count. |
| Wide cathode current range | 45 μA minimum enables use in nanoamp-level battery monitoring; 12 mA maximum supports driving op-amp input stages directly. |
| Automotive temperature rating | –40°C to 125°C operation certified per TI's Q-grade qualification, suitable for engine control and ADAS subsystems. |
| Low long-term drift | ≤120 ppm shift after 1000 hours at 25°C, ensuring reference accuracy retention over product lifetime in energy metering. |
| Zener-zap trimming | Fuse-based wafer-level calibration achieves tight tolerance without post-package adjustment, improving yield and cost efficiency. |
Applications
| ADC Reference Source | Battery Voltage Monitor |
|---|---|
Use Scenario: Providing precise reference for 16-bit SAR ADC in portable medical sensor. IC Role / Device Role / Timing Role: Shunt voltage reference establishing absolute scaling for analog-to-digital conversion. Use Value: ±0.5% tolerance and 20 μVRMS noise ensure <±1 LSB INL error across full temperature range, meeting ISO 13485 signal-chain accuracy requirements. | Use Scenario: Monitoring Li-ion cell voltage in automotive telematics unit. IC Role / Device Role / Timing Role: Stable 1.225 V reference for comparator-based undervoltage lockout and state-of-charge estimation. Use Value: 100 ppm/°C tempco limits reference drift to <0.13 V over –40°C to 125°C, enabling accurate 2.5–4.2 V battery window detection. |
| Power-Supply Supervisor | Industrial Process Transmitter |
Use Scenario: Generating threshold voltage for reset generator in 3.3 V microcontroller supply rail. IC Role / Device Role / Timing Role: Precision shunt reference feeding into voltage comparator for brownout detection. Use Value: 45 μA min operating current allows supervision circuit to draw <100 μA total, extending backup battery life beyond 5 years. | Use Scenario: Biasing 4–20 mA current-loop transmitter in hazardous-area pressure sensor. IC Role / Device Role / Timing Role: Primary voltage reference for DAC and current-sense amplifier in analog front-end. Use Value: Stability under all capacitive loads eliminates need for isolation capacitor, simplifying intrinsically safe barrier design and reducing PCB area by 12 mm². |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | 2.495 V adjustable output; higher 100 μA min cathode current; 50 ppm/°C typical tempco (not specified max) | Requires external resistor divider; unsuitable for direct 1.225 V replacement; better for >2.5 V rails | Select when output voltage flexibility outweighs fixed-voltage simplicity and micropower operation. |
| MAX6008BAUT+T | 1.25 V output; ±0.2% (B grade); 75 ppm/°C max; SC70-3 package; 10 μA typical quiescent current | Lower noise (15 μVRMS) but rated only to 85°C; not automotive-qualified | Prefer for industrial temperature-limited designs where sub-10 μA bias is mandatory and automotive qualification is unnecessary. |
Compared with TL431CDBZR and MAX6008BAUT+T, the LM4041CQDBZR uniquely combines fixed 1.225 V output, automotive temperature rating, micropower operation down to 45 μA, and guaranteed 100 ppm/°C max tempco - making it the only option qualified for safety-critical vehicle battery monitoring without external components or layout changes.
Availability
LM4041CQDBZR is available at Aetrix Electronics and suitable for automotive electronics, precision instrumentation, and battery-powered equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041CQDBZR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LM4041 product line delivers precision shunt references optimized for space-constrained, low-power, and high-reliability applications - specifically engineered for automotive-grade voltage monitoring, portable instrumentation, and energy metering systems demanding long-term stability and minimal external components.
FAQ
What is the output voltage tolerance of the LM4041CQDBZR over its full operating temperature range?
The LM4041CQDBZR has a maximum output voltage tolerance of ±0.5% at 25°C and ±0.7% over the full –40°C to 125°C range, as specified in Section 5.6 of the SLCS146H datasheet. This tolerance includes both initial calibration error and temperature-induced drift, making it suitable for applications requiring consistent 1.225 V reference accuracy across automotive environments without recalibration.
Can the LM4041CQDBZR operate without an output capacitor?
Yes, the LM4041CQDBZR is explicitly designed to be stable with zero output capacitance and remains stable across all capacitive loads (0–∞). Section 7.1 confirms no output capacitor is required, eliminating risk of oscillation or startup delay - a key advantage over series references that mandate specific capacitor values and ESR ranges.
What is the minimum cathode current required for regulation in the LM4041CQDBZR?
The LM4041CQDBZR requires a minimum cathode current of 45 μA (typical) and 80 μA (maximum over temperature) to maintain regulation, as defined in Sections 5.6 and 5.9. This ultra-low current enables use in always-on battery monitors where total system current must remain below 100 μA, while still guaranteeing 1.225 V output within tolerance.
Is the LM4041CQDBZR pin-compatible with other LM4041 variants in SOT-23-3 packages?
Yes, all LM4041 variants in DBZ (SOT-23-3) packaging - including LM4041A/B/C/D grades and I/Q temperature versions - share identical pinout (Cathode-Anode-NC), mechanical footprint, and solder reflow profile. The LM4041CQDBZR can be substituted for LM4041BIDBZR or LM4041A12IDBZR on the same PCB, provided the application accepts ±0.5% vs ±0.2% or ±0.1% tolerance.
Does the LM4041CQDBZR support adjustable output configurations?
No, the LM4041CQDBZR is a fixed-output variant (1.225 V) and does not include a feedback (FB) pin. Adjustable versions such as LM4041CQDCKR use a 5-pin SC70 package with dedicated FB pin; the DBZ package contains only Cathode, Anode, and NC terminals. Attempting to configure LM4041CQDBZR as adjustable will result in loss of regulation.
LM4041CQDBZR 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:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- Current - Output:
- 12 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CQDBZR FAQ
1.How can I place an order for LM4041CQDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CQDBZR 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 LM4041CQDBZR reliable?
The price and inventory of LM4041CQDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CQDBZR is usually 5 days.
3.What payment methods are accepted for LM4041CQDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CQDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CQDBZR?
LM4041CQDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CQDBZR 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 LM4041CQDBZR?
For technical support, including LM4041CQDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CQDBZR requirements.
6.How does Aetrix verify that LM4041CQDBZR is sourced from the original manufacturer or authorized distributors?
All LM4041CQDBZR 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 LM4041CQDBZR meets industry standards.
7.What is the process for return or replacement of LM4041CQDBZR?
All LM4041CQDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CQDBZR, 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 LM4041CQDBZR part is unused and in its original packaging.
Return procedure for LM4041CQDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041CQDBZR 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…
