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Texas Instruments LM4041CIDBZTG4
- Part No.:
- LM4041CIDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIDBZTG4.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,620
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Product details
Overview
LM4041CIDBZTG4 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, 20 μVRMS wideband noise, and stable operation from 45 μA to 12 mA cathode current - used in high-accuracy analog signal chains and low-power sensor interfaces.
For engineers reviewing the LM4041CIDBZTG4 datasheet, LM4041CIDBZTG4 pinout, LM4041CIDBZTG4 application, or LM4041CIDBZTG4 equivalent, this page delivers verified electrical specs, SOT-23-3 pin mapping, industrial-temperature (–40°C to +85°C) performance data, and real-world design guidance for data-acquisition and power-supply monitoring circuits.
Technical Context
The LM4041CIDBZTG4 implements a Zener-based shunt reference architecture trimmed via fuse and Zener-zap during wafer sort to achieve ±0.5% output tolerance at 25°C. It operates as a two-terminal device (anode grounded, cathode supplying regulated voltage) with no external capacitor required for stability across all load capacitances.
Its feedback pin (FB) is absent in the fixed-output variant (LM4041x12), distinguishing it from the adjustable version; dynamic impedance remains ≤1.5 Ω at 1 mA, enabling tight regulation under varying load and supply conditions within its –40°C to +85°C industrial temperature range.
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 divider redesign. |
| Initial Tolerance | ±0.5% max at 25°C (C grade); ensures system-level accuracy without post-manufacturing calibration in metering and instrumentation. |
| Temp Coefficient | 100 ppm/°C max over –40°C to +85°C; maintains <±1.2 mV drift across full industrial range at 1.225 V. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); supports 16-bit+ ADCs in precision data acquisition without added filtering. |
| Cathode Current Range | 45 μA (min) to 12 mA (max); allows ultra-low-power sensor biasing and robust operation in variable-load power monitors. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; minimizes output voltage shift under fast load transients in battery-powered equipment. |
| Long-Term Stability | 120 ppm after 1000 h; guarantees reference integrity over product lifetime in energy metering applications. |
Pinout & Package
LM4041CIDBZTG4 is packaged in a 3-pin SOT-23 (DBZ) surface-mount package with JEDEC-standard footprint and lead-free (NiPdAu) finish, rated for reflow per Level-1-260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Regulated 1.225 V appears here relative to anode; must be connected through series resistor (RS) to unregulated supply. |
| Anode (Pin 2) | Reference ground terminal | Internally tied to circuit ground; must be connected directly to system ground plane for stable regulation. |
| NC (Pin 3) | No-connect terminal | Must float or connect to anode (Pin 2); not internally bonded - leaving unconnected avoids EMI coupling in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load (0–∞), eliminating BOM cost and layout area for output bypass caps in space-constrained designs. |
| Micropower operation | 45 μA minimum cathode current enables use in always-on sensor nodes powered by coin cells or energy harvesters. |
| Low thermal drift | 100 ppm/°C max tempco ensures <±10 mV total drift over –40°C to +85°C - critical for outdoor industrial sensors. |
| High ESD robustness | ±2000 V HBM rating protects against handling damage during PCB assembly and field service. |
| Wide operating current | 12 mA max cathode current supports driving moderate loads (e.g., op-amp bias networks) without external buffering. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution ADC front-end in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for SAR ADC conversion, replacing larger, higher-current bandgap references. Use Value: 20 μVRMS noise and 100 ppm/°C drift enable >16-bit effective resolution without oversampling or calibration. | Use Scenario: Input/output voltage supervision in telecom DC-DC modules and server VRMs. IC Role / Device Role / Timing Role: Shunt reference in comparator-based undervoltage lockout (UVLO) and overvoltage detection circuits. Use Value: 45 μA min current allows reliable trip-point setting even during brownout conditions with weak bias supplies. |
| Instrumentation & Test Equipment | Battery-Powered Equipment |
Use Scenario: Calibration-grade voltage source in handheld oscilloscope probe compensators and signal generators. IC Role / Device Role / Timing Role: Precision shunt reference for DAC output buffering and offset trimming in analog output stages. Use Value: ±0.5% initial tolerance and 120 ppm long-term stability reduce factory calibration frequency and test time. | Use Scenario: Reference for fuel gauges and battery protection ICs in medical wearables and IoT trackers. IC Role / Device Role / Timing Role: Low-power voltage reference for coulomb counting and cell voltage monitoring in Li-ion battery management. Use Value: Micropower operation extends runtime in coin-cell devices; stable output ensures accurate state-of-charge reporting over temperature. |
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 | 2.495 V fixed output, 2% initial tolerance, 50 μA min cathode current, requires external resistors for 1.225 V scaling | Higher output voltage necessitates resistor divider, adding error sources and board area; unsuitable for ultra-low-noise 1.2 V systems | Select when 2.5 V reference is acceptable and cost is primary; avoid where 1.225 V matching or sub-25 μV noise is required. |
| MAX6008AEUR+T | 1.25 V output, ±0.2% tolerance (A grade), 75 ppm/°C tempco, 35 μA min current, SC70-3 package | Lower tempco but higher min current; SC70-3 footprint differs from SOT-23-3 - requires PCB redesign | Prefer for tighter tempco needs in new designs; not drop-in compatible due to package and pinout mismatch. |
Compared with TL431ACDBZR and MAX6008AEUR+T, LM4041CIDBZTG4 uniquely combines 1.225 V fixed output, ±0.5% tolerance, 20 μVRMS noise, and SOT-23-3 compatibility - making it optimal for space-constrained, low-noise, industrial-temperature analog systems requiring minimal external components.
Availability
LM4041CIDBZTG4 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 traceable sourcing.
Supply support for LM4041CIDBZTG4 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 with emphasis on reliability, precision, and power efficiency.
The LM4041 product line delivers micropower shunt voltage references optimized for high-accuracy, low-quiescent-current applications including portable instrumentation, industrial sensing, and energy metering - with grades spanning 0.1% to 1.0% tolerance to balance cost and performance.
FAQ
What is the output voltage and tolerance of LM4041CIDBZTG4?
The LM4041CIDBZTG4 provides a fixed 1.225 V nominal output voltage with a maximum initial tolerance of ±0.5% at 25°C (C grade). This tolerance holds across the full industrial temperature range (–40°C to +85°C) with a maximum temperature coefficient of 100 ppm/°C, ensuring predictable performance in field-deployed equipment without recalibration.
Does LM4041CIDBZTG4 require an output capacitor for stability?
No, LM4041CIDBZTG4 does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads - from 0 pF to very large values - eliminating the need for external bypass capacitors and reducing bill-of-materials cost and PCB area in compact designs.
What is the minimum and maximum cathode current for proper operation of LM4041CIDBZTG4?
LM4041CIDBZTG4 operates correctly with a cathode current between 45 μA (typical minimum) and 12 mA (maximum recommended). Below 45 μA, regulation degrades; above 12 mA, power dissipation exceeds safe limits. The 45 μA minimum enables use in ultra-low-power applications such as battery-backed real-time clocks and wireless sensor nodes.
How is the LM4041CIDBZTG4 pinout configured in the SOT-23 package?
In the SOT-23 (DBZ) package, LM4041CIDBZTG4 has Cathode on Pin 1, Anode on Pin 2, and NC (no-connect) on Pin 3. Pin 3 must either float or be tied to Pin 2 (anode) to prevent EMI coupling - it is not internally bonded and serves no functional role in the fixed-output variant.
Is LM4041CIDBZTG4 suitable for automotive applications?
LM4041CIDBZTG4 is qualified for industrial temperature range (–40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications requiring extended temperature operation (–40°C to +125°C) or automotive qualification, TI offers the LM4041Q variant (e.g., LM4041CQDBZR); LM4041CIDBZTG4 should be used only in non-safety-critical, non-under-hood industrial or consumer systems.
LM4041CIDBZTG4 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:
- Discontinued at Digi-Key
- 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
LM4041CIDBZTG4 FAQ
1.How can I place an order for LM4041CIDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIDBZTG4 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 LM4041CIDBZTG4 reliable?
The price and inventory of LM4041CIDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIDBZTG4 is usually 5 days.
3.What payment methods are accepted for LM4041CIDBZTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIDBZTG4 transactions.
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4.How is shipping managed for LM4041CIDBZTG4?
LM4041CIDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIDBZTG4 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 LM4041CIDBZTG4?
For technical support, including LM4041CIDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIDBZTG4 requirements.
6.How does Aetrix verify that LM4041CIDBZTG4 is sourced from the original manufacturer or authorized distributors?
All LM4041CIDBZTG4 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 LM4041CIDBZTG4 meets industry standards.
7.What is the process for return or replacement of LM4041CIDBZTG4?
All LM4041CIDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIDBZTG4, 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 LM4041CIDBZTG4 part is unused and in its original packaging.
Return procedure for LM4041CIDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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