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Texas Instruments LM4128DQ1MFX4.1/NOPB
- Part No.:
- LM4128DQ1MFX4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DQ1MFX4.1/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,550
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Product details
Overview
LM4128DQ1MFX4.1/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 4.096 V output with ±1.0% initial accuracy (Grade D), 100 ppm/°C max temperature coefficient, and 60 µA supply current. It features an enable pin for 3–7 µA shutdown mode, supports up to 20 mA load, and operates from −40°C to +125°C - ideal for battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LM4128DQ1MFX4.1/NOPB datasheet, LM4128DQ1MFX4.1/NOPB pinout, LM4128DQ1MFX4.1/NOPB application, or LM4128DQ1MFX4.1/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed automotive-grade thermal performance, and real-world design context for precision analog subsystems requiring stable 4.096 V reference rails.
Technical Context
The LM4128DQ1MFX4.1/NOPB implements a band-gap-based series voltage reference architecture with internal enable control logic and low-dropout regulation. Its output remains stable with capacitive loads up to 10 µF and requires only a minimum 0.1 µF input capacitor (CIN ≥ COUT).
It operates across VIN = VREF + 400 mV to 5.5 V at 10 mA load, delivers 4.096 V nominal output with guaranteed 1.0% initial tolerance (Grade D), and maintains ≤100 ppm/°C tempco over −40°C to +125°C junction temperature range - meeting AEC-Q100 Grade 1 requirements for automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal - matches standard 12-bit DAC full-scale reference and enables direct interface with 4.096 V ADC reference inputs. |
| Initial Accuracy | ±1.0% (Grade D) - ensures worst-case output deviation ≤ ±41 mV at 25°C, sufficient for 8-bit system calibration. |
| Tempco | ≤100 ppm/°C - contributes ≤±410 µV/°C drift, limiting total error to < ±49 mV across −40°C to +125°C. |
| Supply Current | 60 µA typical - enables multi-year operation on coin-cell batteries in always-on sensor nodes. |
| Shutdown Current | 3–7 µA with EN = 0 V - reduces quiescent power by >90% during sleep cycles without external circuitry. |
| Dropout Voltage | 175–400 mV at 10 mA - allows operation from 4.5 V supply while maintaining regulation, compatible with 5 V rail systems. |
| Noise (0.1–10 Hz) | 350 µVPP - supports 14-bit effective resolution in low-frequency measurement applications. |
Pinout & Package
LM4128DQ1MFX4.1/NOPB uses the 5-pin SOT-23 (DBV) package per TI package code DBV (R-PDSO-G5), with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected and floating; no PCB trace or via allowed. |
| 2 - GND | Analog ground reference | Primary return path for reference output and internal bias; requires low-impedance connection to system AGND plane. |
| 3 - EN | Enable control input | Active-high logic: VIH ≥ 65% VIN enables output; VIL ≤ 35% VIN forces shutdown (IQ ≤ 7 µA). |
| 4 - VIN | Input supply | Accepts 4.496 V to 5.5 V (VREF + 400 mV min); must be bypassed with ≥0.1 µF ceramic capacitor. |
| 5 - VREF | Precision reference output | Delivers regulated 4.096 V ±1.0%; drives capacitive loads up to 10 µF and resistive loads down to 205 Ω (20 mA). |
Key Features
| Feature | Design Value |
|---|---|
| Grade D automotive qualification | LM4128DQ variant qualified to AEC-Q100 Grade 1 (−40°C to +125°C), manufactured on automotive flow with traceable lot control. |
| Capacitor-free stability | Stable without output capacitor; eliminates BOM cost and layout area while supporting optional COUT up to 10 µF for improved transient response. |
| Low-noise 4.096 V output | 350 µVPP (0.1–10 Hz) enables high-resolution data acquisition in medical sensors and precision transducer interfaces. |
| Indefinite short-circuit protection | Self-limits output current to 75 mA during fault, preventing damage during board-level ESD or wiring errors. |
| Minimal input capacitance requirement | Only 0.1 µF required on VIN (if COUT = 0), reducing component count versus references needing ≥1 µF input bypass. |
Applications
| Portable Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Handheld multimeter or portable gas analyzer operating from single Li-ion cell (3.0–4.2 V) with integrated 12-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 4.096 V reference for ADC full-scale range, enabling direct 1 mV/LSB conversion without gain calibration. Use Value: Grade D tempco and 1.0% accuracy ensure < ±0.5% total measurement error across operating temperature, eliminating field recalibration. |
Use Scenario: Engine coolant temperature (ECT) sensor interface in engine control unit (ECU), where analog front-end conditions PT1000 bridge output. IC Role / Device Role / Timing Role: Supplies excitation reference for ratiometric bridge measurement and ADC reference for digitizing conditioned voltage. Use Value: AEC-Q100 Grade 1 qualification and −40°C to +125°C operation guarantee reliability under hood thermal cycling and vibration stress. |
| Industrial Data Acquisition Modules | Medical Vital Sign Monitors |
|
Use Scenario: DIN-rail mounted PLC analog input module acquiring 4–20 mA loop signals using 16-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Serves as precision reference for both current-to-voltage conversion gain setting and ADC reference voltage. Use Value: 350 µVPP low-frequency noise preserves >14-bit ENOB in slow-sampling modes, critical for sub-millivolt physiological signal fidelity. |
Use Scenario: Portable ECG monitor with dry-electrode front-end and battery-backed memory, requiring ultra-low-power analog subsystem. IC Role / Device Role / Timing Role: Generates 4.096 V reference for analog signal chain while entering 3–7 µA shutdown between heartbeat sampling intervals. Use Value: 60 µA active current and 7 µA shutdown current extend single CR2032 battery life beyond 12 months in intermittent-use clinical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096 V, ±0.2% initial accuracy (Grade A), 50 ppm/°C max tempco, 50 µA IQ, SOT-23-5 | Higher accuracy and lower drift, but not AEC-Q100 qualified; suited for industrial test equipment, not automotive ECUs | Select when tighter initial tolerance and long-term stability outweigh automotive qualification requirements. |
| MAX6035BAUT41+ | 4.096 V, ±0.2% initial accuracy, 75 ppm/°C max tempco, 35 µA IQ, SOT-23-5, ±15 kV HBM ESD | Lower supply current and higher ESD rating, but no automotive qualification; optimized for space-constrained portable medical devices | Choose for ultra-low-power wearable sensors where ESD robustness and battery life are prioritized over automotive compliance. |
Compared with REF3040AIDBZR and MAX6035BAUT41+, the LM4128DQ1MFX4.1/NOPB trades initial accuracy and quiescent current for guaranteed AEC-Q100 Grade 1 qualification and production traceability - making it the only option among the three suitable for safety-critical automotive signal chains without additional qualification effort.
Availability
LM4128DQ1MFX4.1/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable instrumentation, industrial data loggers, and medical monitoring devices requiring stable component supply with automotive-grade reliability and full lifecycle support.
Supply support for LM4128DQ1MFX4.1/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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and automotive-qualified IC manufacturing.
The LM4128Q product line delivers AEC-Q100 Grade 1–qualified series voltage references targeting automotive and industrial applications demanding high accuracy, low power, and extended temperature operation without external compensation.
FAQ
What is the output voltage tolerance and temperature coefficient of LM4128DQ1MFX4.1/NOPB?
The LM4128DQ1MFX4.1/NOPB has a nominal output voltage of 4.096 V with ±1.0% initial accuracy (Grade D) and a maximum temperature coefficient of 100 ppm/°C over −40°C to +125°C. These values are fully specified and production-tested per the SNVS475E datasheet, ensuring predictable performance in automotive and industrial environments where thermal stability is critical. The LM4128DQ1MFX4.1/NOPB meets AEC-Q100 Grade 1 requirements with these parameters guaranteed across its full operating range.
Does LM4128DQ1MFX4.1/NOPB require an external output capacitor for stability?
No, the LM4128DQ1MFX4.1/NOPB is internally compensated and stable without an external output capacitor. It remains stable with capacitive loads up to 10 µF, allowing optional COUT placement to improve load transient response. However, a minimum 0.1 µF ceramic input capacitor (CIN) is mandatory - and must satisfy CIN ≥ COUT if an output capacitor is used. This design eliminates dependency on external components for basic functionality, simplifying layout and reducing BOM count for the LM4128DQ1MFX4.1/NOPB.
What is the shutdown current and enable logic behavior of LM4128DQ1MFX4.1/NOPB?
The LM4128DQ1MFX4.1/NOPB draws 3–7 µA in shutdown mode when the EN pin is driven low (VIL ≤ 35% VIN). The enable pin is active-high with VIH ≥ 65% VIN required to activate regulation. An internal ~2 µA pull-up allows EN to be left floating or tied directly to VIN for always-on operation. This behavior is explicitly characterized in the Electrical Characteristics table of the LM4128DQ1MFX4.1/NOPB datasheet and applies across the full temperature range.
Is LM4128DQ1MFX4.1/NOPB qualified for automotive applications?
Yes, LM4128DQ1MFX4.1/NOPB is an AEC-Q100 Grade 1 qualified device, manufactured on an automotive-grade process flow and tested across −40°C to +125°C. The "Q" suffix denotes automotive qualification, and the part marking "DQ" confirms Grade D accuracy with Grade 1 thermal rating. TI's packaging documentation explicitly lists LM4128DQ1MFX4.1/NOPB under automotive status, making it suitable for ECU, body control, and ADAS sensor interface applications without additional qualification.
What is the minimum input voltage required for LM4128DQ1MFX4.1/NOPB to maintain regulation at 10 mA load?
The LM4128DQ1MFX4.1/NOPB requires VIN ≥ VREF + 400 mV to maintain regulation at 10 mA load, resulting in a minimum input voltage of 4.496 V. This dropout specification is guaranteed across temperature and load conditions, with typical dropout as low as 175 mV at 10 mA and 25°C. The device ceases regulation if VIN falls below this threshold, and recovery occurs within microseconds once VIN rises above the limit - a behavior confirmed in the SNVS475E datasheet's Dropout Voltage and Line Regulation sections for the LM4128DQ1MFX4.1/NOPB.
LM4128DQ1MFX4.1/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 350µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.496V ~ 5.5V
- Current - Supply:
- 100µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128DQ1MFX4.1/NOPB FAQ
1.How can I place an order for LM4128DQ1MFX4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DQ1MFX4.1/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 LM4128DQ1MFX4.1/NOPB reliable?
The price and inventory of LM4128DQ1MFX4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128DQ1MFX4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DQ1MFX4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DQ1MFX4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DQ1MFX4.1/NOPB?
LM4128DQ1MFX4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DQ1MFX4.1/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 LM4128DQ1MFX4.1/NOPB?
For technical support, including LM4128DQ1MFX4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DQ1MFX4.1/NOPB requirements.
6.How does Aetrix verify that LM4128DQ1MFX4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DQ1MFX4.1/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 LM4128DQ1MFX4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DQ1MFX4.1/NOPB?
All LM4128DQ1MFX4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DQ1MFX4.1/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 LM4128DQ1MFX4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4128DQ1MFX4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128DQ1MFX4.1/NOPB Tags
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