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Texas Instruments LM4128CQ1MFX3.0/NOPB
- Part No.:
- LM4128CQ1MFX3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128CQ1MFX3.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,701
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Product details
Overview
LM4128CQ1MFX3.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 3.0 V output with ±0.5% initial accuracy, 100 ppm/°C temperature coefficient, and 60 µA supply current. It features an enable pin for 3 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 LM4128CQ1MFX3.0/NOPB datasheet, LM4128CQ1MFX3.0/NOPB pinout, LM4128CQ1MFX3.0/NOPB application, or LM4128CQ1MFX3.0/NOPB equivalent, key selection criteria include its grade-C accuracy specification, automotive-grade AEC-Q100 qualification, dropout voltage of 175–400 mV at 10 mA, stability with capacitive loads up to 10 µF, and absence of required external output capacitor.
Technical Context
The LM4128CQ1MFX3.0/NOPB is a band-gap-based series voltage reference with internal enable logic and no external stabilization capacitor requirement. Its architecture ensures stability with low-ESR ceramic capacitors (CIN ≥ 0.1 µF, COUT optional), supports indefinite short-circuit protection (75 mA limit), and maintains regulation across input voltages from VREF + 400 mV to 5.5 V.
It implements a fixed 3.0 V output with grade-C initial tolerance (±0.5%) and guaranteed 100 ppm/°C max tempco over −40°C to +125°C. The enable pin accepts logic-level control referenced to VIN, with VIH ≥ 65% VIN and VIL ≤ 35% VIN, enabling low-power system sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.5% initial accuracy (grade C) - ensures stable ADC/DAC biasing within 15 mV error at 25°C |
| Temperature Coefficient | 100 ppm/°C max - limits drift to ±300 µV over full −40°C to +125°C range |
| Supply Current | 60 µA typical - enables multi-year operation on coin-cell batteries in portable sensors |
| Shutdown Current | 3–7 µA with EN = 0 V - reduces standby power by >95% vs active mode |
| Dropout Voltage | 175–400 mV at 10 mA load - allows operation from 3.175 V input, compatible with single Li-ion or 3.3 V LDO rails |
| Load Regulation | 25–120 ppm/mA - holds output within ±2.4 mV across 0–20 mA load variation |
| Noise (0.1–10 Hz) | 285 µVPP - suitable for 16-bit SAR ADCs without additional filtering |
Pinout & Package
LM4128CQ1MFX3.0/NOPB uses the 5-pin SOT-23 (DBV) package per JEDEC MO-178AB, with 0.95 mm pitch and 2.9 mm × 1.6 mm footprint. Pin 1 is NC (no connect), requiring floating connection; thermal performance assumes θJ-A = 220°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect terminal | Must remain unconnected; not internally bonded - avoids parasitic coupling or mechanical stress |
| 2 (GND) | Analog ground reference | Primary return path for reference current; requires low-impedance PCB plane connection |
| 3 (EN) | Enable control input | Active-high logic input; pulls up internally (~2 µA); drives into shutdown when <35% VIN |
| 4 (VIN) | Input supply rail | Accepts 3.4 V to 5.5 V; must exceed VREF + 400 mV for regulation; bypass with ≥0.1 µF ceramic |
| 5 (VREF) | Precision output terminal | 3.0 V reference source; stable with 0–10 µF capacitive loads; drives resistive or op-amp inputs directly |
Key Features
| Feature | Design Value |
|---|---|
| Grade-C automotive qualification | AEC-Q100 Grade 1 qualified (−40°C to +125°C), manufactured on automotive flow - supports under-hood and ADAS sensor modules |
| Capacitor-free stability | No mandatory output capacitor; stable with COUT = 0–10 µF - simplifies layout and eliminates ESR sensitivity |
| Low dropout operation | Minimizes headroom requirement: regulates down to VIN = 3.175 V at 10 mA - extends battery life in 3.3 V systems |
| Indefinite short-circuit protection | Self-limits output current to 75 mA during fault - prevents thermal runaway and enables robust field deployment |
| Low long-term drift | 50 ppm typical drift over 1000 hours - maintains calibration integrity in medical and test equipment without periodic recalibration |
Applications
| Instrumentation Signal Chain | Battery-Powered Sensors |
|---|---|
Use Scenario: High-resolution data acquisition in handheld multimeters and portable oscilloscopes. IC Role / Device Role / Timing Role: Precision 3.0 V reference for 16-bit SAR ADC front-end and DAC output scaling. Use Value: ±0.5% initial accuracy and 100 ppm/°C tempco ensure measurement repeatability across temperature shifts without software correction. |
Use Scenario: Low-power environmental monitoring nodes powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Stable reference for analog sensor signal conditioning and microcontroller ADC reference. Use Value: 60 µA quiescent current and 3 µA shutdown mode extend battery life beyond 5 years in sleep-dominated operation. |
| Automotive Sensor Modules | Industrial Process Controllers |
Use Scenario: Pressure and temperature sensing in engine control units (ECUs) and brake systems. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 certified reference for analog front-ends interfacing with CAN/LIN transceivers. Use Value: Guaranteed −40°C to +125°C operation and 50 ppm long-term stability meet ASIL-B functional safety requirements for sensor biasing. |
Use Scenario: Modular PLC I/O modules requiring calibrated analog input/output channels. IC Role / Device Role / Timing Role: Primary voltage reference for isolated 4–20 mA transmitter circuits and precision voltage-to-current conversion. Use Value: Load regulation of 25 ppm/mA and line regulation of 70 ppm/V minimize span error across varying supply and load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0 V, ±0.2% initial accuracy (grade A), 50 ppm/°C max tempco, 50 µA IQ, SOT-23-3 package (no EN pin) | Lacks enable function and automotive qualification; lower accuracy grade but tighter tempco | Select when shutdown control is unnecessary and higher initial accuracy is prioritized over AEC-Q100 compliance |
| MAX6033BAUT30+T | 3.0 V, ±0.5% initial accuracy, 75 ppm/°C max tempco, 35 µA IQ, SOT-23-5 with EN, but non-automotive grade | Same pinout and enable functionality, but not AEC-Q100 qualified; lower supply current | Prefer for industrial or consumer designs where automotive qualification is not required and ultra-low IQ is critical |
Compared with REF3030AIDBZR and MAX6033BAUT30+T, the LM4128CQ1MFX3.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, integrated enable, and grade-C accuracy in a production-validated automotive flow - making it the only drop-in option for safety-critical vehicle subsystems requiring both functional safety and power-gating capability.
Availability
LM4128CQ1MFX3.0/NOPB is available at Aetrix Electronics and suitable for instrumentation signal chains, battery-powered sensors, and automotive sensor modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4128CQ1MFX3.0/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 manufacturing.
The LM4128 family was developed specifically for space-constrained, low-power, high-stability applications in automotive, industrial, and portable instrumentation - emphasizing grade-tiered accuracy, wide temperature operation, and simplified system integration.
FAQ
What is the operating temperature range for the LM4128CQ1MFX3.0/NOPB?
The LM4128CQ1MFX3.0/NOPB is rated for −40°C to +125°C junction temperature, meeting AEC-Q100 Grade 1 requirements. This range is fully validated across all electrical specifications including initial accuracy, tempco, and load regulation - ensuring reliable performance in under-hood automotive environments and industrial control cabinets.
Does the LM4128CQ1MFX3.0/NOPB require an external output capacitor?
No, the LM4128CQ1MFX3.0/NOPB is designed to operate stably without an output capacitor and remains stable with capacitive loads up to 10 µF. An input capacitor (≥0.1 µF ceramic) is mandatory, but COUT is optional - used only to improve transient response in high-dynamic-load applications.
What is the minimum input voltage required for regulation with the LM4128CQ1MFX3.0/NOPB?
The LM4128CQ1MFX3.0/NOPB requires VIN ≥ VREF + 400 mV (i.e., ≥3.4 V) for full-load regulation at 10 mA. Dropout voltage is specified as 175–400 mV depending on load and temperature - enabling use with tightly regulated 3.3 V supplies when load current is reduced.
How does the enable pin function on the LM4128CQ1MFX3.0/NOPB?
The EN pin on the LM4128CQ1MFX3.0/NOPB is active-high with internal ~2 µA pull-up. It enters shutdown (3–7 µA IQ) when pulled below 35% VIN and enables normal operation when driven above 65% VIN. The pin must never exceed VIN, and floating EN defaults to enabled due to internal pull-up.
Is the LM4128CQ1MFX3.0/NOPB pin-compatible with other LM4128 variants?
Yes, all LM4128xMFXx.x/NOPB variants - including LM4128AMF-3.0/NOPB and LM4128BQ1MFX3.0/NOPB - share identical 5-pin SOT-23 (DBV) packaging and pinout. Only the grade (A/B/C/D) and voltage option differ; no PCB redesign is needed when upgrading accuracy or tempco within the same 3.0 V version.
LM4128CQ1MFX3.0/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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 285µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.4V ~ 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
LM4128CQ1MFX3.0/NOPB FAQ
1.How can I place an order for LM4128CQ1MFX3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128CQ1MFX3.0/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 LM4128CQ1MFX3.0/NOPB reliable?
The price and inventory of LM4128CQ1MFX3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128CQ1MFX3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128CQ1MFX3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128CQ1MFX3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128CQ1MFX3.0/NOPB?
LM4128CQ1MFX3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128CQ1MFX3.0/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 LM4128CQ1MFX3.0/NOPB?
For technical support, including LM4128CQ1MFX3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128CQ1MFX3.0/NOPB requirements.
6.How does Aetrix verify that LM4128CQ1MFX3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128CQ1MFX3.0/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 LM4128CQ1MFX3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128CQ1MFX3.0/NOPB?
All LM4128CQ1MFX3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128CQ1MFX3.0/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 LM4128CQ1MFX3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128CQ1MFX3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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