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Texas Instruments LM4128CMF-3.0/NOPB
- Part No.:
- LM4128CMF-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128CMF-3.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:855
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Product details
Overview
LM4128CMF-3.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 package, delivering 3.0 V output with ±0.5% initial accuracy (C grade), 100 ppm/°C max 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 portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4128CMF-3.0/NOPB datasheet, LM4128CMF-3.0/NOPB pinout, LM4128CMF-3.0/NOPB application, or LM4128CMF-3.0/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and load regulation performance, and two rigorously cross-referenced alternative parts for precision analog design.
Technical Context
The LM4128CMF-3.0/NOPB uses an internal band-gap-derived reference architecture optimized for low quiescent current and high stability without external compensation. Its enable-controlled startup sequence and dropout voltage of 175–400 mV (at 10 mA) support operation from VIN = VREF + 400 mV to 5.5 V.
It achieves stable regulation with capacitive loads up to 10 µF and requires only a minimum 0.1 µF input ceramic capacitor (CIN ≥ COUT). Output noise is 285 µVPP (0.1–10 Hz), and long-term stability is 50 ppm over 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.5% initial tolerance (C grade) - ensures accurate ADC/DAC biasing without calibration. |
| Tempco | 100 ppm/°C max - limits drift to ±0.375 mV over −40°C to +125°C operating range. |
| Supply Current | 60 µA typical - enables multi-year battery life in always-on sensor nodes. |
| Shutdown Current | 3–7 µA with EN = 0 V - reduces system standby power by >90% vs active mode. |
| Dropout Voltage | 175–400 mV at 10 mA - allows operation from 3.175 V input, compatible with single Li-ion cells. |
| Load Regulation | 25–120 ppm/mA - maintains <±0.36 mV output shift across full 0–20 mA load range. |
| Line Regulation | 70 ppm/V - holds output error within ±0.21 mV for input variations from 3.4 V to 5.5 V. |
Pinout & Package
LM4128CMF-3.0/NOPB is housed in a 5-pin SOT-23 (DBV) package with 0.95 mm pitch, JEDEC MO-178AA compliant, and RoHS-compliant matte tin (SN) lead finish. Thermal resistance θJ-A = 220°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected and floating; no internal connection or function. |
| 2 - GND | Analog ground reference | Primary return path for reference current; must be tied to clean low-impedance system ground. |
| 3 - EN | Active-high enable control | Drives internal regulator on when ≥65% of VIN; pulls to GND to enter 3–7 µA shutdown state. |
| 4 - VIN | Input supply rail | Accepts 3.4 V to 5.5 V; must exceed VREF + 400 mV for regulation; bypassed with ≥0.1 µF ceramic cap. |
| 5 - VREF | Precision output terminal | Delivers stable 3.0 V reference; capable of sourcing up to 20 mA; stable with ≤10 µF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Enable pin with 3–7 µA shutdown | Reduces system idle power in portable devices without requiring external MOSFET switching. |
| No external stabilization capacitor required | Eliminates BOM cost and layout area while maintaining stability with 0–10 µF output capacitance. |
| Stable with low-ESR ceramic capacitors | Enables use of compact X5R/X7R MLCCs instead of bulkier tantalum or electrolytic types. |
| Indefinite short-circuit protection | Limits output current to 75 mA during fault conditions, preventing device damage or thermal runaway. |
| −40°C to +125°C junction temperature range | Supports deployment in automotive engine compartments and industrial control cabinets without derating. |
Applications
| Portable Data Loggers | Medical Patient Monitors |
|---|---|
Use Scenario: Battery-powered field instruments recording temperature, pressure, and ECG waveforms over extended periods. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for 12–16-bit SAR ADCs and precision op-amp signal conditioning stages. Use Value: Enables ±0.5% measurement accuracy across temperature and battery discharge, extending usable runtime via 60 µA quiescent current. |
Use Scenario: Compact bedside monitors measuring SpO₂, respiration rate, and non-invasive blood pressure. IC Role / Device Role / Timing Role: Supplies regulated 3.0 V reference for analog front-end (AFE) ICs and isolated sensor interfaces. Use Value: Guarantees <±0.375 mV output drift over −40°C to +85°C clinical operating range, meeting IEC 60601-1 accuracy requirements. |
| Automotive Cabin Controllers | Industrial PLC Analog Input Modules |
Use Scenario: HVAC, seat position, and ambient light sensing modules in passenger compartment ECUs. IC Role / Device Role / Timing Role: Serves as primary voltage reference for microcontroller ADCs and sensor excitation circuits. Use Value: Maintains 100 ppm/°C tempco and 50 ppm long-term stability over 15-year vehicle lifetime, satisfying AEC-Q100 Grade 1 reliability. |
Use Scenario: DIN-rail mounted I/O modules converting 4–20 mA or 0–10 V field signals into digital values for SCADA systems. IC Role / Device Role / Timing Role: Delivers precision 3.0 V reference for high-resolution ΣΔ ADCs and programmable gain amplifiers. Use Value: Achieves <±0.36 mV load regulation error across 0–20 mA sensor loop currents, enabling 0.1% full-scale accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0 V, ±0.2% initial accuracy (A grade), 50 ppm/°C max tempco, 50 µA IQ, SOT-23-3 package (no EN pin) | Lower accuracy drift but lacks enable control; requires external switch for shutdown | Preferred where ultra-low tempco outweighs need for integrated enable functionality |
| MAX6033AESA30+ | 3.0 V, ±0.2% initial accuracy, 75 ppm/°C max tempco, 35 µA IQ, SO-8 package with EN and TRIM pins | Larger footprint and higher cost; offers trim capability for post-assembly calibration | Selected when fine-tuning output voltage is required in production test or field calibration |
Compared with LM4128CMF-3.0/NOPB, REF3030AIDBZR trades integrated enable for superior temperature stability, while MAX6033AESA30+ adds trimming flexibility at the cost of size and complexity - making LM4128CMF-3.0/NOPB optimal for space-constrained, enable-driven micropower designs.
Availability
LM4128CMF-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, medical monitoring equipment, and automotive cabin controllers requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM4128CMF-3.0/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 high-volume manufacturing.
The LM4128 product line delivers micropower, high-accuracy series voltage references for space-constrained, battery-sensitive applications - engineered for stability across automotive, industrial, and medical environments.
FAQ
What is the maximum input voltage for LM4128CMF-3.0/NOPB?
The absolute maximum input voltage for LM4128CMF-3.0/NOPB is 6 V, but the recommended operating maximum is 5.5 V per the Electrical Characteristics table. Exceeding 5.5 V risks violating the Absolute Maximum Ratings and may cause permanent damage. The device regulates properly when VIN is between VREF + 400 mV (i.e., 3.4 V) and 5.5 V at 10 mA load.
Does LM4128CMF-3.0/NOPB require an input capacitor?
Yes - LM4128CMF-3.0/NOPB requires a minimum 0.1 µF ceramic input capacitor (CIN) connected between VIN and GND. If an output capacitor (COUT) is used, CIN must be ≥ COUT. This capacitor ensures stability, reduces input noise coupling, and minimizes overshoot during startup. Omitting CIN risks oscillation or erratic regulation behavior.
What is the output voltage accuracy specification for LM4128CMF-3.0/NOPB?
LM4128CMF-3.0/NOPB is a C-grade device with ±0.5% initial output voltage accuracy at 25°C, meaning its 3.0 V output falls between 2.985 V and 3.015 V under nominal conditions. This tolerance is guaranteed over the full −40°C to +125°C junction temperature range, with additional drift governed by its 100 ppm/°C max temperature coefficient.
Can LM4128CMF-3.0/NOPB drive a 10 µF capacitive load?
Yes - LM4128CMF-3.0/NOPB is explicitly characterized as stable with capacitive loads up to 10 µF, as stated in the datasheet's "Features" and "APPLICATION INFORMATION" sections. This eliminates the need for external isolation resistors or damping networks, simplifying layout and improving transient response in high-capacitance sensor or filter applications.
What is the shutdown current of LM4128CMF-3.0/NOPB?
The shutdown current of LM4128CMF-3.0/NOPB is 3–7 µA when the EN pin is driven low (≤35% of VIN), as specified in the Electrical Characteristics table under "IQ_SD". This ultra-low standby current enables energy-efficient duty-cycled operation in wireless sensor nodes and IoT endpoints where average power budget is sub-µA.
LM4128CMF-3.0/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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128CMF-3.0/NOPB FAQ
1.How can I place an order for LM4128CMF-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128CMF-3.0/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 LM4128CMF-3.0/NOPB reliable?
The price and inventory of LM4128CMF-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128CMF-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128CMF-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128CMF-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128CMF-3.0/NOPB?
LM4128CMF-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128CMF-3.0/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 LM4128CMF-3.0/NOPB?
For technical support, including LM4128CMF-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128CMF-3.0/NOPB requirements.
6.How does Aetrix verify that LM4128CMF-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128CMF-3.0/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 LM4128CMF-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128CMF-3.0/NOPB?
All LM4128CMF-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128CMF-3.0/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 LM4128CMF-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128CMF-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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