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Texas Instruments LM4041CIZ-1.2/NOPB
- Part No.:
- LM4041CIZ-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4041CIZ-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,685
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Product details
Overview
LM4041CIZ-1.2/NOPB from Texas Instruments is a precision 1.225 V shunt voltage reference in TO-92 package, rated for extended temperature operation (−40°C to +125°C), with ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It serves as a stable reference in high-accuracy analog signal chains for battery-powered instrumentation.
For engineers reviewing the LM4041CIZ-1.2/NOPB datasheet, LM4041CIZ-1.2/NOPB pinout, LM4041CIZ-1.2/NOPB application, or LM4041CIZ-1.2/NOPB equivalent, key selection criteria include reverse breakdown voltage stability across load current (60 μA–12 mA), capacitive-load tolerance without external compensation, thermal hysteresis (0.08%), and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4041CIZ-1.2/NOPB implements a bandgap-based Zener-zap trimmed shunt reference architecture with curvature-corrected temperature drift compensation. Its three-terminal TO-92 configuration operates in reverse breakdown mode, where cathode supplies regulated voltage and anode connects to system ground.
It delivers stable 1.225 V output under varying supply conditions via low dynamic impedance (≤1.5 Ω at 1 mA) and maintains accuracy over full industrial-to-extended temperature range without requiring output capacitance-enabling direct integration into space-constrained, low-power sensor front-ends and data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; fixed value enables direct replacement of 1.2 V references in ADC/DAC biasing and sensor excitation circuits |
| Initial Tolerance | ±0.5% at 25°C (C-grade); corresponds to ±6.1 mV absolute error, supporting <12-bit system accuracy without trimming |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C; contributes ≤124 μV drift across full range, critical for automotive and industrial metering |
| Operating Current | 60 μA to 12 mA; ultra-low minimum current allows operation from micro-power LDOs or high-value bias resistors |
| Noise (10 Hz–10 kHz) | 20 μVRMS; low enough to avoid degrading ENOB in 16-bit SAR ADC references |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; ensures minimal load regulation error (<1.5 mV per mA load change) in precision current-sense applications |
| Thermal Hysteresis | 0.08% (≈0.98 mV); guarantees repeatable voltage after thermal cycling, essential for calibration-critical test equipment |
Pinout & Package
LM4041CIZ-1.2/NOPB uses a 3-pin TO-92 through-hole package (body size 4.30 mm × 4.30 mm) with standard lead form. Pin assignment is verified per TI SNOS641I Rev J (July 2025): Pin 1 = NC (no connect), Pin 2 = Cathode (I/O), Pin 3 = Anode (O, normally grounded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connect (NC) | Must be left floating or tied to anode; no internal connection-prevents unintended feedback paths in noisy environments |
| Pin 2 | Cathode | Shunt current input and regulated output node; connects to VREF net and load; requires series resistor from supply |
| Pin 3 | Anode | Reference ground terminal; must be connected to system ground plane with low-impedance path to minimize ground bounce errors |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct use in compact PCB layouts and eliminates capacitor aging, leakage, and ESR-related drift |
| Tolerates capacitive loads | Stable with up to 10 nF directly on cathode-supports filtering for sensitive analog inputs without phase-margin risk |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation, meeting automotive powertrain and ADAS module requirements |
| Low 20 μVRMS noise | Preserves signal integrity in high-resolution measurement systems where reference noise dominates total system noise floor |
| 60 μA minimum operating current | Permits use with megaohm-level bias resistors, extending battery life in portable gas sensors and IoT edge nodes |
Applications
| Battery-Powered Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter measuring DC voltage with 16-bit SAR ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for ADC full-scale calibration and sensor excitation. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <0.1% total error across field temperature range without recalibration. | Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Serves as precision shunt reference for programmable gain instrumentation amplifier and ADC driver stage. Use Value: 20 μVRMS noise and ≤1.5 Ω dynamic impedance prevent reference-induced quantization noise and load-regulation error. |
| Automotive Energy Metering | Precision Audio Level Detection |
Use Scenario: Onboard EV charger monitoring grid-side AC voltage and current with isolated sigma-delta converters. IC Role / Device Role / Timing Role: Supplies reference for isolated ADCs measuring RMS voltage/current in high-noise power electronics environment. Use Value: AEC-Q100 Grade 1 rating and 0.08% thermal hysteresis guarantee repeatable metrology accuracy after thermal stress cycles. | Use Scenario: High-fidelity audio analyzer detecting peak signal levels across 20 Hz–20 kHz bandwidth. IC Role / Device Role / Timing Role: Sets accurate threshold for RMS-to-DC converter and envelope detector stages. Use Value: Low 20 μVRMS noise avoids false triggering and enables sub-0.1 dB level resolution in professional audio test gear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIZ-1.2/NOPB | Same TO-92 package and 1.225 V output, but ±0.5% tolerance achieved via different trimming method; higher 150 ppm/°C max TC | Lacks AEC-Q100 qualification; not rated for automotive extended temperature operation | Select when cost sensitivity outweighs automotive qualification and tighter TC requirements |
| MAX6008AEUR+T | 1.25 V output, ±0.2% initial tolerance, 75 ppm/°C TC, SC70-3 package; lower 12 μVRMS noise | Surface-mount only; no through-hole option; not AEC-Q100 qualified | Choose for space-constrained PCBs needing superior noise performance and tighter initial accuracy, excluding automotive use |
Compared with LM4041CIZ-1.2/NOPB, LM4040CIZ-1.2/NOPB trades automotive qualification and tighter TC for lower cost, while MAX6008AEUR+T offers better noise and accuracy in SC70 but sacrifices through-hole mounting and automotive compliance.
Availability
LM4041CIZ-1.2/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial data acquisition, and automotive energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041CIZ-1.2/NOPB 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 automotive-grade qualification.
The LM4041-N product line delivers micro-power shunt references optimized for space-constrained, high-accuracy applications including portable test equipment, automotive subsystems, and industrial process control where stability, low noise, and qualification rigor are mandatory.
FAQ
What is the output voltage of the LM4041CIZ-1.2/NOPB?
The LM4041CIZ-1.2/NOPB provides a precise 1.225 V reverse breakdown voltage, specified at 100 μA test current. This fixed output is factory-trimmed and guaranteed within ±0.5% at 25°C (C-grade), making it suitable for applications requiring stable low-voltage references such as ADC biasing and sensor excitation circuits. The LM4041CIZ-1.2/NOPB maintains this voltage across its full 60 μA–12 mA operating current range.
Does the LM4041CIZ-1.2/NOPB require an external output capacitor?
No, the LM4041CIZ-1.2/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability even with capacitive loads up to 10 nF directly connected to the cathode. This eliminates capacitor-related drift, leakage, and board space-making the LM4041CIZ-1.2/NOPB ideal for compact, low-maintenance analog designs where reliability and simplicity are critical.
What temperature range is supported by the LM4041CIZ-1.2/NOPB?
The LM4041CIZ-1.2/NOPB is qualified for extended temperature operation from −40°C to +125°C (AEC-Q100 Grade 1). This rating is confirmed in TI's official documentation and applies specifically to the C-grade TO-92 variant. Its 100 ppm/°C maximum temperature coefficient ensures predictable voltage drift across this full range, supporting use in under-hood automotive modules and industrial control cabinets without derating.
Is the LM4041CIZ-1.2/NOPB AEC-Q100 qualified?
Yes, the LM4041CIZ-1.2/NOPB is AEC-Q100 qualified as Grade 1 (−40°C to +125°C ambient). This qualification is explicitly documented in the TI SNOS641I datasheet and confirms robustness for automotive powertrain, body electronics, and ADAS applications. The LM4041CIZ-1.2/NOPB meets stress testing requirements including temperature cycling, HTOL, and ESD (HBM ±2 kV), distinguishing it from non-automotive variants like the LM4040 series.
What is the noise performance of the LM4041CIZ-1.2/NOPB?
The LM4041CIZ-1.2/NOPB delivers 20 μVRMS wideband noise over 10 Hz to 10 kHz, measured at 100 μA operating current. This low-noise characteristic is critical for high-resolution data acquisition systems, where reference noise directly limits effective number of bits (ENOB). The LM4041CIZ-1.2/NOPB achieves this without external filtering, maintaining signal fidelity in precision instrumentation and audio test equipment.
LM4041CIZ-1.2/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- 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:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4041CIZ-1.2/NOPB FAQ
1.How can I place an order for LM4041CIZ-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIZ-1.2/NOPB 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 LM4041CIZ-1.2/NOPB reliable?
The price and inventory of LM4041CIZ-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIZ-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041CIZ-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIZ-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIZ-1.2/NOPB?
LM4041CIZ-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIZ-1.2/NOPB 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 LM4041CIZ-1.2/NOPB?
For technical support, including LM4041CIZ-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIZ-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041CIZ-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041CIZ-1.2/NOPB 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 LM4041CIZ-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041CIZ-1.2/NOPB?
All LM4041CIZ-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIZ-1.2/NOPB, 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 LM4041CIZ-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041CIZ-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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