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Texas Instruments LM4040CIZ-4.1/NOPB
- Part No.:
- LM4040CIZ-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LM4040CIZ-4.1/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:458
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Product details
Overview
LM4040CIZ-4.1/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering 4.096 V nominal reverse breakdown voltage with ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and stable operation from 68 μA to 15 mA supply current. It serves as a compact, capacitor-free reference for analog-to-digital converters and sensor signal conditioning in industrial field transmitters.
For engineers reviewing the LM4040CIZ-4.1/NOPB datasheet, LM4040CIZ-4.1/NOPB pinout, LM4040CIZ-4.1/NOPB application, or LM4040CIZ-4.1/NOPB equivalent, key selection criteria include its 4.096 V output accuracy over −40°C to +85°C, low 35 μVrms noise (10 Hz–10 kHz), no external capacitor requirement, and TO-92 mechanical compatibility with legacy through-hole designs.
Technical Context
The LM4040CIZ-4.1/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial voltage tolerance at 25°C and integrates bandgap-derived curvature correction for flat temperature drift. Its shunt topology requires an external current-limiting resistor and sinks load current via cathode while anode connects to ground.
It operates across 68 μA to 15 mA reverse current, maintains stability with capacitive loads up to 10 nF, and exhibits 0.8 mV typical voltage change over 100 μA–1 mA current range-enabling high-precision biasing in low-power data acquisition front-ends without active regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage; enables exact 12-bit full-scale alignment in 5 V ADC systems. |
| Initial Tolerance | ±0.5% at 25°C (C grade); corresponds to ±20.5 mV absolute error, sufficient for 10-bit system calibration. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C; contributes ≤±33 mV drift across full industrial range. |
| Operating Current | 68 μA min to 15 mA max; supports ultra-low-power sensor nodes and robust industrial current-loop interfaces. |
| Output Noise | 35 μVrms (10 Hz–10 kHz); limits effective resolution to ~16.5 ENOB in precision measurement circuits. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA; ensures <1 mV load regulation shift per 1 mA current variation. |
| Thermal Hysteresis | 0.08% after −40°C/125°C cycling; adds ≤±3.3 mV non-recoverable offset in thermally cycled deployments. |
Pinout & Package
LM4040CIZ-4.1/NOPB uses a 3-pin TO-92 package (body size 4.30 mm × 4.30 mm) with axial leads. Pin 1 is Cathode (I/O), Pin 2 is Anode (O, grounded), and Pin 3 is NC (no connect, must float or tie to anode per EMI guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Connects to regulated voltage rail; sinks all operating current plus load current-requires series resistor from supply. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; defines 0 V reference point for output voltage measurement. |
| NC (Pin 3) | No-connect terminal | Left floating or tied to Pin 2 (anode) to reduce EMI susceptibility near switching noise sources. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-constrained PCB layouts without stability-compensation components. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance-supports filtering directly at reference node without oscillation risk. |
| Zener-zap voltage trim | Ensures ±0.5% initial accuracy at 25°C without post-package adjustment or laser trimming. |
| Bandgap temperature curvature correction | Flattens voltage vs. temperature curve to meet 100 ppm/°C max spec across −40°C to +85°C. |
| Low 35 μVrms noise | Minimizes quantization uncertainty in 16-bit+ SAR and delta-sigma ADC reference paths. |
Applications
| Field Transmitter Calibration | Industrial Data Acquisition |
|---|---|
|
Use Scenario: 4–20 mA loop-powered pressure transmitter with onboard ADC and microcontroller. IC Role / Device Role / Timing Role: Shunt voltage reference for ratiometric sensor excitation and ADC reference input. Use Value: 4.096 V output aligns exactly with 212 = 4096 LSB full-scale of 12-bit DAC/ADC, eliminating software scaling. |
Use Scenario: Modular analog input module accepting ±10 V, 0–5 V, and thermocouple signals. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and successive-approximation ADC. Use Value: 100 ppm/°C tempco ensures <±0.1% reading error over cabinet temperature swings without recalibration. |
| Energy Infrastructure Monitoring | Automotive Battery Management |
|
Use Scenario: Smart electricity meter measuring voltage, current, and power factor on 3-phase grid. IC Role / Device Role / Timing Role: Stable reference for metrology-grade sigma-delta ADC sampling AC waveforms. Use Value: 35 μVrms noise prevents added quantization noise floor degradation in 24-bit energy measurement. |
Use Scenario: EV battery pack monitor IC measuring cell voltages in 100-cell series stack. IC Role / Device Role / Timing Role: Local reference for isolated ADCs in distributed cell monitoring units. Use Value: TO-92 package allows through-hole mounting on compact, high-vibration cell boards with proven mechanical reliability. |
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 | Adjustable 2.5 V reference (2.495 V ±1%), higher 1 mA min current, 0.22 Ω dynamic impedance. | Requires two external resistors for 4.096 V setting; less accurate due to resistor tolerance sensitivity. | Select when board already uses TL431 and design can accommodate resistor network and higher quiescent current. |
| MAX6008AEUR+T | Fixed 4.096 V shunt reference, ±0.2% initial tolerance (A grade), 75 ppm/°C max tempco, SOT-23 package. | SMT-only; lacks TO-92 mechanical compatibility and automotive qualification of LM4040CIZ-4.1/NOPB. | Choose for higher accuracy and smaller footprint where through-hole mounting is not required. |
Compared with TL431CDBZR and MAX6008AEUR+T, LM4040CIZ-4.1/NOPB uniquely combines TO-92 through-hole packaging, AEC-Q100 Grade 3 qualification, and factory-trimmed 4.096 V output-making it optimal for industrial field devices requiring mechanical ruggedness and drop-in replacement of legacy references.
Availability
LM4040CIZ-4.1/NOPB is available at Aetrix Electronics and suitable for field transmitters, industrial data acquisition modules, and energy infrastructure monitoring systems requiring stable component supply with long-term traceability and consistent parametric performance.
Supply support for LM4040CIZ-4.1/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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and communications product portfolios.
LM4040-N is part of TI's precision voltage reference family designed specifically for space-constrained, low-power applications demanding high initial accuracy, low temperature drift, and capacitor-free operation in harsh environments.
FAQ
What is the output voltage tolerance of LM4040CIZ-4.1/NOPB at 25°C?
The LM4040CIZ-4.1/NOPB has a ±0.5% initial reverse breakdown voltage tolerance at 25°C, corresponding to ±20.5 mV around its nominal 4.096 V output. This C-grade specification is production-tested and guaranteed per TI's SNOS633N datasheet Section 5.15, making LM4040CIZ-4.1/NOPB suitable for applications requiring better than 10-bit absolute accuracy without calibration.
Does LM4040CIZ-4.1/NOPB require an external output capacitor?
No, LM4040CIZ-4.1/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization components while maintaining robust operation with capacitive loads up to 10 nF-confirmed in the "No output capacitor required" feature and Figure 8-1 of the LM4040-N datasheet. This simplifies layout and reduces BOM count in LM4040CIZ-4.1/NOPB-based designs.
What is the minimum operating current for LM4040CIZ-4.1/NOPB?
The LM4040CIZ-4.1/NOPB requires a minimum reverse operating current of 68 μA at 25°C, as specified in Section 5.3 (Recommended Operating Conditions) of the datasheet. This value increases slightly over temperature, reaching 70 μA at +85°C, ensuring reliable conduction and voltage regulation across the full industrial range of the LM4040CIZ-4.1/NOPB.
Which package type does LM4040CIZ-4.1/NOPB use?
LM4040CIZ-4.1/NOPB uses the TO-92 package (orderable suffix 'Z'), a 3-pin through-hole plastic package with 4.30 mm × 4.30 mm body size and axial leads. Pin configuration is Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3), as documented in Figure 4-2 and Table 4-1 of the LM4040-N datasheet-distinct from SOT-23 or SC70 variants of the same family.
Is LM4040CIZ-4.1/NOPB qualified for automotive applications?
No, LM4040CIZ-4.1/NOPB is not AEC-Q100 qualified. It belongs to the industrial-grade LM4040-N series (Grade I, −40°C to +85°C). For automotive use, TI offers the LM4040-N-Q1 variant (e.g., LM4040CQIZ-4.1/NOPB), which is AEC-Q100 Grade 3 qualified. The 'Q' in the part number denotes automotive qualification-LM4040CIZ-4.1/NOPB lacks this designation and should not be used in safety-critical automotive systems.
LM4040CIZ-4.1/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):
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LM4040CIZ-4.1/NOPB FAQ
1.How can I place an order for LM4040CIZ-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIZ-4.1/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 LM4040CIZ-4.1/NOPB reliable?
The price and inventory of LM4040CIZ-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIZ-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIZ-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIZ-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIZ-4.1/NOPB?
LM4040CIZ-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIZ-4.1/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 LM4040CIZ-4.1/NOPB?
For technical support, including LM4040CIZ-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIZ-4.1/NOPB requirements.
6.How does Aetrix verify that LM4040CIZ-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIZ-4.1/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 LM4040CIZ-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIZ-4.1/NOPB?
All LM4040CIZ-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIZ-4.1/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 LM4040CIZ-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIZ-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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