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Texas Instruments LM4128DMF-3.0/NOPB
- Part No.:
- LM4128DMF-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DMF-3.0/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
LM4128DMF-3.0/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 (C grade), 100 ppm/°C max temperature coefficient, and 60 µA supply current. It supports up to 20 mA load current, features an enable pin for 3 µA shutdown mode, and operates from −40°C to +125°C - ideal for portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4128DMF-3.0/NOPB datasheet, LM4128DMF-3.0/NOPB pinout, LM4128DMF-3.0/NOPB application, or LM4128DMF-3.0/NOPB equivalent, key selection criteria include its 3.0 V fixed output, low dropout (≤400 mV at 10 mA), stability with capacitive loads up to 10 µF, and absence of required external output capacitor - enabling compact, low-power analog front-end designs.
Technical Context
The LM4128DMF-3.0/NOPB uses a band-gap–derived series reference architecture with internal enable control logic and thermal compensation. Its design eliminates need for external output stabilization while maintaining stability with 0–10 µF capacitive loads and low-ESR ceramic capacitors.
It operates across VIN = VREF + 400 mV to 5.5 V, delivers 3.0 V output with load regulation of ≤120 ppm/mA (0–20 mA), line regulation of ≤70 ppm/V, and exhibits 285 µVPP (0.1–10 Hz) output noise - confirming suitability for 12-bit to 14-bit ADC reference and precision regulator applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.5% initial accuracy (C grade) - ensures <±15 mV absolute error at 25°C for calibration-critical circuits |
| Tempco | 100 ppm/°C max (C grade) - limits drift to <±30 mV over −40°C to +125°C operating range |
| Supply Current | 60 µA typical - enables >1-year battery life in 10 µA-systems with periodic wake-up |
| Shutdown Current | 3–7 µA with EN = 0 V - reduces quiescent power by >90% during sleep cycles |
| Dropout Voltage | 175–400 mV at 10 mA - allows operation from single-cell Li-ion (3.0–4.2 V) or 3.3 V rail with margin |
| Load Current | Up to 20 mA - sufficient to drive ADC reference inputs, op-amp bias networks, and DAC buffers directly |
| Noise (0.1–10 Hz) | 285 µVPP - supports 14-bit effective resolution in precision measurement front-ends |
Pinout & Package
LM4128DMF-3.0/NOPB is housed in a 5-pin SOT-23 (DBV) surface-mount package (package drawing DBV, 2.9 mm × 1.6 mm × 1.15 mm). Pin 1 is N/C (no connect); pins are arranged top-view with pin 1 marked by dot or bevel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N/C) | No-connect terminal | Must remain unconnected and floating - no routing or soldering permitted |
| 2 (GND) | Analog ground reference | Primary return path for reference output and internal circuitry; requires low-impedance connection to system AGND |
| 3 (EN) | Enable control input | Active-high logic input; VIH ≥65% VIN, VIL ≤35% VIN - enables 3 µA shutdown when pulled low |
| 4 (VIN) | Input supply | Accepts 3.4 V to 5.5 V (≥VREF + 400 mV); must be bypassed with ≥0.1 µF ceramic capacitor (CIN) |
| 5 (VREF) | Precision reference output | 3.0 V regulated output; stable with 0–10 µF capacitive loads; optional COUT improves transient response |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0 V output | Eliminates external resistor network; guarantees monotonicity and avoids trimming errors in production |
| Enable pin with 3 µA shutdown | Reduces system standby power without requiring external MOSFET switches or LDO sequencing |
| Stable without output capacitor | Removes BOM cost and board space for COUT; simplifies layout for space-constrained portable designs |
| Low 100 ppm/°C tempco (C grade) | Meets industrial-grade drift requirements for sensor signal conditioning and closed-loop control feedback |
| Indefinite short-circuit protection | Withstands output-to-ground faults continuously at ≤75 mA - prevents latch-up or thermal damage |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental monitoring node acquiring temperature, humidity, and pressure data every 5 minutes. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for 14-bit SAR ADC and excitation for resistive bridge sensors. Use Value: 100 ppm/°C tempco and 285 µVPP noise ensure <±0.1% full-scale measurement accuracy across −25°C to +70°C field operating range. |
Use Scenario: 4–20 mA loop-powered transmitter with HART modulation in factory automation. IC Role / Device Role / Timing Role: Supplies precision reference for DAC-based current loop control and internal LDO biasing. Use Value: 60 µA supply current and enable pin allow microcontroller to power down reference between HART bursts, extending loop lifetime. |
| Medical Patient Monitors | Test & Measurement Equipment |
|
Use Scenario: Portable ECG front-end with lead-off detection and analog filtering prior to digitization. IC Role / Device Role / Timing Role: Sets common-mode voltage and ADC reference for biopotential amplifiers and anti-alias filters. Use Value: Low 285 µVPP noise and 120 ppm/mA load regulation prevent baseline wander and amplitude distortion in sub-µV signal paths. |
Use Scenario: Benchtop multimeter with auto-ranging and 16-bit ΣΔ ADC for DC voltage measurements. IC Role / Device Role / Timing Role: Serves as primary reference for internal calibration and DMM input scaling networks. Use Value: ±0.5% initial accuracy and 50 ppm long-term stability (1000 hrs) support 0.1% basic accuracy specification without field recalibration. |
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, 50 ppm/°C, 50 µA IQ, SOT-23-3 - no enable pin, 3-pin footprint | Lacks shutdown control; requires external switch for power gating; lower tempco but higher cost per unit | Select when ultra-low drift dominates over power control needs and PCB real estate permits redesign |
| MAX6033BAUT30+T | 3.0 V, 0.2% initial accuracy, 75 ppm/°C, 65 µA IQ, SOT-23-5 - includes enable, but 10 µA shutdown current | Higher shutdown current reduces battery savings; same pinout but different enable threshold (VIH = 1.4 V min) | Choose when compatibility with MAXIM-based legacy designs exists and 10 µA shutdown is acceptable |
Compared with REF3030AIDBZR and MAX6033BAUT30+T, LM4128DMF-3.0/NOPB offers the lowest shutdown current (3 µA) and guaranteed stability without COUT - critical for ultra-low-power and space-constrained applications where enable functionality and layout simplicity are prioritized over minimal tempco improvement.
Availability
LM4128DMF-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical patient monitors requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LM4128DMF-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, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs and industrial-grade reliability.
LM4128DMF-3.0/NOPB belongs to TI's precision micropower voltage reference product line, designed specifically for high-accuracy, low-quiescent-current applications in battery-operated and thermally demanding environments.
FAQ
What is the initial accuracy and grade designation of LM4128DMF-3.0/NOPB?
The LM4128DMF-3.0/NOPB is a C-grade device with ±0.5% initial output voltage accuracy at 25°C. This is confirmed in the Electrical Characteristics table for LM4128-3.0 under "LM4128C-3.0" row, where Min/Max limits are −0.5% and +0.5%. The "D" suffix in the part number denotes the C grade per TI's LM4128 family naming convention.
Does LM4128DMF-3.0/NOPB require an output capacitor (COUT) for stability?
No, LM4128DMF-3.0/NOPB is internally compensated and stable with 0 µF to 10 µF capacitive loads - including no output capacitor. The datasheet explicitly states "The LM4128 is designed to operate with or without an output capacitor" and confirms stability up to 10 µF. COUT is optional and used only to improve load transient response.
What is the minimum input voltage required for LM4128DMF-3.0/NOPB to regulate at 3.0 V?
The minimum input voltage for LM4128DMF-3.0/NOPB is VREF + 400 mV = 3.4 V under 10 mA load, per the Operating Ratings and Dropout Voltage specification. At lighter loads, dropout decreases (e.g., 175 mV at 10 mA, typ.), but 3.4 V is the guaranteed minimum for full 3.0 V regulation across temperature and process variation.
How does the enable pin (EN) function on LM4128DMF-3.0/NOPB?
The EN pin on LM4128DMF-3.0/NOPB is active-high with VIH ≥65% VIN and VIL ≤35% VIN. When pulled low (≤35% VIN), it places LM4128DMF-3.0/NOPB into shutdown mode drawing 3–7 µA. When tied to VIN or left open (relying on internal ~2 µA pull-up), LM4128DMF-3.0/NOPB operates normally. It is not compatible with fixed logic-level signals unless VIN is known and stable.
Is LM4128DMF-3.0/NOPB qualified for automotive applications?
No, LM4128DMF-3.0/NOPB is not automotive-qualified. Only variants with "Q" suffix (e.g., LM4128CQ-3.0) are AEC-Q100 Grade 1 qualified. The "NOPB" suffix indicates RoHS-compliant, commercial/industrial temperature grade (−40°C to +125°C), but lacks automotive qualification testing and flow.
LM4128DMF-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:
- ±1%
- 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
LM4128DMF-3.0/NOPB FAQ
1.How can I place an order for LM4128DMF-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DMF-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 LM4128DMF-3.0/NOPB reliable?
The price and inventory of LM4128DMF-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 LM4128DMF-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DMF-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DMF-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DMF-3.0/NOPB?
LM4128DMF-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DMF-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 LM4128DMF-3.0/NOPB?
For technical support, including LM4128DMF-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DMF-3.0/NOPB requirements.
6.How does Aetrix verify that LM4128DMF-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DMF-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 LM4128DMF-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DMF-3.0/NOPB?
All LM4128DMF-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DMF-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 LM4128DMF-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128DMF-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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