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Texas Instruments LM4041CIDBZT
- Part No.:
- LM4041CIDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIDBZT.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:946
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Product details
Overview
LM4041CIDBZT from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.5% initial tolerance (C grade), 100ppm/°C max temperature coefficient, 20μVRMS typical noise, and stable operation from 45μA to 12mA cathode current. It serves as a compact, low-drift reference in high-accuracy analog signal chains and portable power monitoring circuits.
For engineers reviewing the LM4041CIDBZT datasheet, LM4041CIDBZT pinout, LM4041CIDBZT application, or LM4041CIDBZT equivalent, this page delivers verified specifications, SOT-23-3 pin mapping, industrial-temperature (–40°C to 85°C) performance data, and real-world substitution guidance for precision voltage reference selection.
Technical Context
The LM4041CIDBZT implements a Zener-based shunt architecture with laser-trimmed reverse breakdown voltage and dynamic impedance under 1.5Ω at 1mA. Its internal feedback loop maintains regulation without external capacitors, supporting all capacitive loads while delivering stable 1.225V output across wide current and temperature ranges.
Designed for space-constrained systems, it operates with only 45μA minimum cathode current and exhibits low long-term drift (120ppm after 1000 hours). The device's thermal coefficient is specified over full industrial range (–40°C to 85°C), ensuring predictable behavior in battery-powered instrumentation and industrial sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V nominal; enables direct replacement of legacy 1.2V references without resistor network redesign. |
| Initial Tolerance | ±0.5% max at 25°C (C grade); reduces calibration burden in 12-bit+ data acquisition systems. |
| Temp Coefficient | 100ppm/°C max over –40°C to 85°C; ensures ≤0.85mV drift across full industrial range. |
| Noise (10Hz–10kHz) | 20μVRMS typical; supports low-noise ADC biasing and precision comparator thresholds. |
| Operating Current | 45μA (min) to 12mA (max); allows ultra-low-power sensor nodes and high-current reference buffering. |
| Dynamic Impedance | ≤1.5Ω at 1mA; minimizes load-induced output variation in varying-current applications. |
| Long-Term Drift | 120ppm after 1000h; supports 10-year system reliability in energy metering and process control. |
Pinout & Package
LM4041CIDBZT uses the 3-pin SOT-23 (DBZ) package - compact (2.92mm × 1.6mm × 1.15mm), surface-mount, RoHS-compliant, and rated for reflow per JEDEC Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current path and output node | Connects to supply rail via series resistor; sinks total current (load + reference bias) to maintain regulated voltage. |
| Anode (Pin 2) | Reference ground reference | Must be connected to system ground; forms return path for cathode current and defines output voltage reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to Anode (Pin 2) in high-EMI environments per TI recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates reliably with any capacitive load (0–∞), eliminating need for output bypass capacitor and reducing BOM count. |
| Micropower operation | 45μA minimum cathode current enables use in coin-cell-powered devices and always-on monitoring circuits. |
| Low dynamic impedance | ≤1.5Ω at 1mA ensures <1.5mV output shift under 1mA load transients-critical for high-resolution SAR ADC references. |
| Wide temperature range | Specified from –40°C to +85°C (industrial grade) supports deployment in outdoor sensors and factory automation hardware. |
| ESD robustness | ±2000V HBM rating protects against handling damage during PCB assembly and field service. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 16-bit ADC front-end in environmental sensor nodes requiring stable reference under variable battery voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 1.225V reference for ADC conversion accuracy. Use Value: ±0.5% tolerance and 100ppm/°C TC ensure <0.01% full-scale error drift over temperature, meeting IEC 61000-4-30 Class A requirements. | Use Scenario: Real-time monitoring of 3.3V/5V rails in industrial PLC I/O modules with fault reporting via microcontroller ADC. IC Role / Device Role / Timing Role: Precision shunt reference enabling accurate ratiometric measurement of supply voltage via resistor divider. Use Value: 20μVRMS noise and low dynamic impedance prevent ADC quantization errors during transient load events. |
| Instrumentation & Test Equipment | Battery-Powered Equipment |
Use Scenario: Calibration-grade multimeter reference stage where long-term stability impacts traceability to NIST standards. IC Role / Device Role / Timing Role: Primary voltage reference in auto-ranging DMM reference subsystem. Use Value: 120ppm/1000h drift enables annual recalibration intervals without degradation of 4½-digit accuracy. | Use Scenario: Portable gas detector with electrochemical sensor requiring stable bias voltage from single AA cell (0.9–1.5V). IC Role / Device Role / Timing Role: Low-current shunt reference generating regulated 1.225V from boosted supply or LDO output. Use Value: 45μA min operating current allows continuous operation for >5 years on 2500mAh alkaline battery (typical). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | 2.5V fixed output; higher 100μA min cathode current; 50ppm/°C TC; requires external resistors for 1.225V setup. | Not drop-in: needs resistor divider and layout change; better for higher-voltage references (>2V) and higher-current apps (≥1mA). | Select when 2.5V reference suffices or when higher output current capability (up to 100mA) is required. |
| MAX6008AEUR+T | 1.25V output; ±0.2% initial tolerance (A grade); 75ppm/°C TC; 35μA min current; SC70-3 package. | Different pinout (SC70 vs SOT-23); tighter tolerance but lower max temp (–40°C to 85°C same); not pin-compatible. | Choose for improved accuracy and lower noise (12μVRMS) where board redesign is acceptable and footprint permits SC70. |
Compared with TL431ACDBZR and MAX6008AEUR+T, the LM4041CIDBZT offers direct 1.225V compatibility, lowest quiescent current among alternatives, and proven stability in high-capacitance sensor interfaces-making it optimal for space- and power-constrained industrial sensing.
Availability
LM4041CIDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4041CIDBZT 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 high-reliability manufacturing.
The LM4041 product line delivers micropower, low-drift shunt references optimized for portable instrumentation, industrial sensing, and energy metering-prioritizing accuracy, stability, and ease of integration over wide temperature and current ranges.
FAQ
What is the maximum operating temperature range for the LM4041CIDBZT?
The LM4041CIDBZT is characterized for industrial temperature operation from –40°C to +85°C. This range is validated per TI's LM4041xI specification tables and applies across all electrical parameters including tolerance, temperature coefficient, and dynamic impedance. The device remains fully functional within this ambient range without derating, making it suitable for factory-floor and outdoor deployed systems where thermal cycling occurs.
Does the LM4041CIDBZT require an output capacitor for stability?
No, the LM4041CIDBZT does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads-from 0 to infinity-as confirmed in Section 7.1 of the official datasheet. This eliminates the need for external bypass components, simplifying layout and reducing bill-of-materials cost in space-constrained designs such as handheld test equipment and IoT sensor nodes.
What is the minimum cathode current needed for regulation in the LM4041CIDBZT?
The LM4041CIDBZT requires a minimum cathode current of 45μA (typical) at 25°C to maintain regulation, with a worst-case value of 80μA across the full –40°C to +85°C range. This low current threshold enables use in ultra-low-power applications like battery-backed memory supervisors and wake-up circuitry where standby current budgets are sub-100μA.
How does the LM4041CIDBZT differ from adjustable versions of the LM4041 family?
The LM4041CIDBZT is a fixed-output variant with 1.225V nominal voltage and no feedback (FB) pin. Adjustable versions (e.g., LM4041BIDBZT) include a dedicated FB pin and require external resistors to set VZ between 1.225V and 10V. The LM4041CIDBZT omits the FB function entirely-its pinout has only Cathode, Anode, and NC-reducing complexity and cost in applications needing only 1.225V reference.
Is the LM4041CIDBZT pin-compatible with other SOT-23 shunt references like the TL431?
No, the LM4041CIDBZT is not pin-compatible with the TL431 or similar 3-pin shunt references. While both use SOT-23 packages, the LM4041CIDBZT assigns Pin 1 to Cathode and Pin 2 to Anode, whereas TL431 uses Pin 1 for Cathode, Pin 2 for Ref, and Pin 3 for Anode. Swapping them without board revision will cause functional failure. Always verify pin mapping using TI's DBZ package diagram (Figure 4-1) before substitution.
LM4041CIDBZT 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CIDBZT FAQ
1.How can I place an order for LM4041CIDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIDBZT 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 LM4041CIDBZT reliable?
The price and inventory of LM4041CIDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIDBZT is usually 5 days.
3.What payment methods are accepted for LM4041CIDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIDBZT?
LM4041CIDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIDBZT 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 LM4041CIDBZT?
For technical support, including LM4041CIDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIDBZT requirements.
6.How does Aetrix verify that LM4041CIDBZT is sourced from the original manufacturer or authorized distributors?
All LM4041CIDBZT 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 LM4041CIDBZT meets industry standards.
7.What is the process for return or replacement of LM4041CIDBZT?
All LM4041CIDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIDBZT, 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 LM4041CIDBZT part is unused and in its original packaging.
Return procedure for LM4041CIDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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