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Texas Instruments LM4128AQ1MF3.0/NOPB
- Part No.:
- LM4128AQ1MF3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128AQ1MF3.0/NOPB.pdf
- Description:
- LM4128-Q1 SOT-23 PRECISION MICRO
- Quantity:
- Payment:
- Shipping:
Inventory:12,204
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Product details
Overview
LM4128AQ1MF3.0/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified, precision micropower series voltage reference in a 5-pin SOT-23 package, delivering 3.0 V output with ±0.1% initial accuracy, 75 ppm/°C max temperature coefficient, and 60 µA supply current. It enables stable 3.0 V reference generation in automotive sensor signal conditioning circuits where low dropout (400 mV at 10 mA) and shutdown capability (3 µA) are critical.
For engineers reviewing the LM4128AQ1MF3.0/NOPB datasheet, LM4128AQ1MF3.0/NOPB pinout, LM4128AQ1MF3.0/NOPB application, or LM4128AQ1MF3.0/NOPB equivalent, key selection criteria include its automotive-grade qualification, 3.0 V output tolerance over −40°C to +125°C, enable-controlled power gating, stability with up to 10 µF capacitive loads, and compatibility with low-ESR ceramic bypass capacitors.
Technical Context
The LM4128AQ1MF3.0/NOPB implements a band-gap-based series voltage reference architecture with internal enable logic and rail-to-rail input operation down to VREF + 400 mV. Its design eliminates need for external stabilization capacitors while maintaining stability across load currents from 0 to 20 mA and capacitive loads up to 10 µF.
It features a dedicated EN pin with 35%–65% VIN hysteresis thresholds, supports indefinite short-circuit protection (75 mA limit), and delivers 285 µVPP (0.1–10 Hz) output noise - confirmed for the 3.0 V variant per Electrical Characteristics table on page 6 of SNVS475E.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.1% initial accuracy (Grade A) - ensures ≤±3 mV absolute error at 25°C for high-resolution ADC biasing. |
| Tempco | 75 ppm/°C max - limits drift to ≤±225 ppm (≤±0.675 mV) over −40°C to +125°C junction range. |
| Supply Current | 60 µA typical - enables multi-year battery life in always-on automotive monitoring nodes. |
| Shutdown Current | 3 µA max - reduces quiescent power by >95% when disabled via EN pin. |
| Dropout Voltage | 400 mV max at 10 mA - allows operation from 3.4 V supply in 3.3 V system rails with margin. |
| Noise (0.1–10 Hz) | 285 µVPP - meets <1 LSB error requirement for 16-bit 3.0 V full-scale ADCs. |
| Load Current | 20 mA max - supports direct driving of op-amp reference inputs and small DACs without buffering. |
Pinout & Package
LM4128AQ1MF3.0/NOPB uses the 5-pin SOT-23 (DBV) package - compact surface-mount outline measuring 2.9 mm × 1.6 mm × 1.15 mm - optimized for space-constrained automotive PCBs and thermally isolated mounting near analog signal chains.
| 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 output and internal bias; requires low-impedance PCB plane tie. |
| 3 - EN | Enable control input | Active-high logic input; pulls up internally (~2 µA); drives device into 3 µA shutdown when <35% VIN. |
| 4 - VIN | Input supply | Accepts 3.4 V to 5.5 V (VREF + 400 mV min); supplies internal band-gap core and output stage. |
| 5 - VREF | Precision reference output | Stable 3.0 V source with load regulation ≤120 ppm/mA; stable with 0–10 µF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications operating from −40°C to +125°C junction temperature. |
| No external capacitor required | Internally compensated - stable with zero output capacitance, eliminating BOM cost and layout risk. |
| Capacitive load drive | Guaranteed stability with up to 10 µF ceramic output capacitance - improves transient response in noisy environments. |
| Low thermal hysteresis | 75 ppm max - minimizes voltage shift after thermal cycling, critical for calibration-critical systems. |
| Indefinite short-circuit protection | Self-limiting to 75 mA - prevents damage during ESD events or board-level faults without external fusing. |
Applications
| Automotive Sensor Signal Conditioning | Portable Data Acquisition |
|---|---|
Use Scenario: High-accuracy temperature and pressure sensor front-ends in engine control units requiring stable excitation and ADC reference under wide ambient swings. IC Role / Device Role / Timing Role: Provides 3.0 V precision reference for ratiometric sensor bridges and 16-bit SAR ADCs. Use Value: Enables <±0.1% total measurement error over lifetime, meeting ASIL-B functional safety requirements. |
Use Scenario: Battery-powered handheld multimeters and environmental monitors needing long runtime and consistent measurement repeatability. IC Role / Device Role / Timing Role: Supplies regulated 3.0 V reference for low-power microcontroller ADCs and analog front-end gain stages. Use Value: Delivers 60 µA supply current and 3 µA shutdown mode - extends single-CR2032 battery life beyond 5 years in sleep mode. |
| Industrial Process Transmitters | Medical Vital Sign Monitors |
Use Scenario: 4–20 mA loop-powered field transmitters deployed in chemical plants where long-term drift directly impacts regulatory compliance. IC Role / Device Role / Timing Role: Generates stable 3.0 V reference for DACs controlling current output and for sensor excitation. Use Value: 50 ppm long-term stability (1000 hrs) and 75 ppm/°C tempco ensure <0.25% calibration drift over 5-year service interval. |
Use Scenario: Portable ECG and pulse oximetry devices requiring clinical-grade accuracy and low-noise analog signal paths. IC Role / Device Role / Timing Role: Supplies ultra-low-noise 3.0 V reference for instrumentation amplifiers and high-resolution ADCs sampling bio-signals. Use Value: 285 µVPP (0.1–10 Hz) noise floor avoids contamination of sub-mV physiological waveforms. |
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, 100 ppm/°C max tempco, 50 µA IQ, SOT-23-5; not AEC-Q100 qualified. | Lacks automotive qualification and Grade A accuracy; suitable for industrial/commercial portable gear only. | Select when AEC-Q100 compliance is unnecessary and cost sensitivity outweighs long-term stability needs. |
| ADR3430ARJZ-R7 | 3.0 V, ±0.1% initial accuracy, 50 ppm/°C max tempco, 120 µA IQ, SOT-23-5; AEC-Q100 Grade 1 qualified. | Higher supply current and lower noise (15 µVPP) but narrower input range (up to 5.5 V, no dropout spec). | Prefer when ultra-low noise dominates over quiescent power; verify VIN headroom constraints in low-voltage systems. |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, LM4128AQ1MF3.0/NOPB uniquely balances AEC-Q100 Grade 1 qualification, 0.1% accuracy, 75 ppm/°C tempco, and 60 µA supply current - making it optimal for automotive and industrial battery-backed systems demanding both reliability and micropower operation.
Availability
LM4128AQ1MF3.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable data loggers, and industrial 4–20 mA transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4128AQ1MF3.0/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 analog ICs and automotive-grade components.
The LM4128Q series was designed specifically for automotive and high-reliability industrial applications requiring AEC-Q100 qualification, low drift, and micropower operation in compact SOT-23 packaging.
FAQ
What is the maximum input voltage for LM4128AQ1MF3.0/NOPB?
The maximum input voltage for LM4128AQ1MF3.0/NOPB is 5.5 V, as specified in the Operating Ratings section of the SNVS475E datasheet. Exceeding this voltage risks permanent damage. The device operates down to VREF + 400 mV (i.e., 3.4 V minimum at 10 mA load), enabling use in 3.3 V system rails with adequate headroom.
Does LM4128AQ1MF3.0/NOPB require an input capacitor?
Yes, LM4128AQ1MF3.0/NOPB requires an input capacitor (CIN). Per the APPLICATION INFORMATION section, CIN must be ≥0.1 µF if no output capacitor is used, and must satisfy CIN ≥COUT when COUT is present. A ceramic X5R/X7R capacitor placed close to the VIN and GND pins is mandatory for stable operation and noise reduction.
Is LM4128AQ1MF3.0/NOPB pin-compatible with other LM4128 variants?
Yes, all LM4128xMF-x.x/NOPB variants - including LM4128AQ1MF3.0/NOPB - share identical 5-pin SOT-23 (DBV) pinout and footprint. Pin functions (N/C, GND, EN, VIN, VREF) and mechanical dimensions are fully consistent across output voltages and grade suffixes, enabling drop-in replacement within the same voltage option group.
What is the output noise performance of LM4128AQ1MF3.0/NOPB?
LM4128AQ1MF3.0/NOPB delivers 285 µVPP integrated output noise over the 0.1 Hz to 10 Hz bandwidth, as measured and published in the LM4128-3.0 Electrical Characteristics table (page 6 of SNVS475E). This value is specific to the 3.0 V variant and supports high-precision measurement applications such as 16-bit data acquisition.
How does the enable pin (EN) function on LM4128AQ1MF3.0/NOPB?
The EN pin on LM4128AQ1MF3.0/NOPB is an active-high digital control input with internal ~2 µA pull-up. It enters shutdown mode (IQ ≤7 µA) when pulled below 35% of VIN and activates normal operation when driven above 65% of VIN. Leaving EN unconnected defaults to enabled state due to the internal pull-up, but external control is recommended for deterministic power sequencing.
LM4128AQ1MF3.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 75ppm/°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
LM4128AQ1MF3.0/NOPB FAQ
1.How can I place an order for LM4128AQ1MF3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128AQ1MF3.0/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 LM4128AQ1MF3.0/NOPB reliable?
The price and inventory of LM4128AQ1MF3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128AQ1MF3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128AQ1MF3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128AQ1MF3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128AQ1MF3.0/NOPB?
LM4128AQ1MF3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128AQ1MF3.0/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 LM4128AQ1MF3.0/NOPB?
For technical support, including LM4128AQ1MF3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128AQ1MF3.0/NOPB requirements.
6.How does Aetrix verify that LM4128AQ1MF3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128AQ1MF3.0/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 LM4128AQ1MF3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128AQ1MF3.0/NOPB?
All LM4128AQ1MF3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128AQ1MF3.0/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 LM4128AQ1MF3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128AQ1MF3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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