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Texas Instruments LM4128AQ1MFX3.0/NOPB
- Part No.:
- LM4128AQ1MFX3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128AQ1MFX3.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,680
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Product details
Overview
LM4128AQ1MFX3.0/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 battery-powered instrumentation, automotive sensor signal conditioning, and portable data acquisition where low dropout (400 mV at 10 mA), enable-controlled shutdown (3 µA), and stability with up to 10 µF capacitive loads are critical.
For engineers reviewing the LM4128AQ1MFX3.0/NOPB datasheet, LM4128AQ1MFX3.0/NOPB pinout, LM4128AQ1MFX3.0/NOPB application, or LM4128AQ1MFX3.0/NOPB equivalent, key selection considerations include its automotive-grade qualification, 3.0 V fixed output, enable pin interface, SOT-23 thermal performance, and compatibility with ceramic bypass capacitors without external stabilization.
Technical Context
The LM4128AQ1MFX3.0/NOPB implements a band-gap-based series voltage reference architecture with internal enable control logic and rail-to-rail input operation down to VREF + 400 mV. Its design eliminates need for external stabilization while maintaining stability with capacitive loads up to 10 µF and low-ESR ceramic capacitors.
It features a dedicated enable pin (EN) referenced to VIN, not ground, with VIH ≥ 65% VIN and VIL ≤ 35% VIN thresholds, and integrates indefinite short-circuit protection limiting output current to 75 mA. Junction temperature range is −40°C to +125°C, supporting automotive under-hood and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.1% initial accuracy over temperature ensures <±3 mV absolute error at 25°C for 12-bit ADC reference scaling |
| Temperature Coefficient | 75 ppm/°C max (A grade) - drift ≤ ±9.4 mV across −40°C to +125°C operating range |
| Supply Current | 60 µA typical - enables multi-year battery life in always-on sensor nodes drawing <100 µA total system current |
| Shutdown Current | 3 µA max when EN = 0 V - reduces quiescent power by >95% during system sleep modes |
| Dropout Voltage | 400 mV max at 10 mA load - supports operation from single-cell Li-ion (3.0–4.2 V) or 3.3 V rails with margin |
| Output Noise | 285 µVPP (0.1–10 Hz) - suitable for 16-bit SAR ADCs requiring <1 LSB noise at 3 V full-scale |
| Load Regulation | 25–120 ppm/mA - maintains <±0.36 mV output shift from 0 to 20 mA load, critical for precision DAC buffers |
Pinout & Package
LM4128AQ1MFX3.0/NOPB is housed in a RoHS-compliant, lead-free 5-pin SOT-23 (DBV) package with moisture sensitivity level 1 (260°C peak reflow). The package measures 2.9 mm × 1.6 mm × 1.15 mm and is optimized for thermal dissipation in high-density PCB layouts.
| 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 |
| 3 (EN) | Enable control input | Active-high logic input referenced to VIN; drives internal regulator on/off; VIH ≥ 65% VIN, VIL ≤ 35% VIN |
| 4 (VIN) | Input supply rail | Accepts 3.4 V to 5.5 V (VREF + 400 mV min); supplies internal band-gap and output stage |
| 5 (VREF) | Precision reference output | 3.0 V regulated output capable of sourcing up to 20 mA; stable with 0–10 µF capacitive loads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with guaranteed operation from −40°C to +125°C junction temperature |
| Enable pin with 3 µA shutdown | Reduces system standby power by enabling precise control of reference activation in multi-sensor modules |
| No external capacitor required | Eliminates BOM cost and layout area for stabilization capacitor while maintaining stability with 10 µF loads |
| Low 75 ppm/°C tempco (A grade) | Meets tight drift requirements for closed-loop motor control feedback and high-resolution data loggers |
| Stable with low-ESR ceramic capacitors | Supports use of compact, high-frequency X5R/X7R MLCCs without oscillation risk or ESR compensation networks |
Applications
| Automotive Sensor Signal Conditioning | Portable Data Acquisition Systems |
|---|---|
Use Scenario: Reference for analog front-end of tire pressure monitoring systems (TPMS) and engine coolant temperature sensors in vehicles. IC Role / Device Role / Timing Role: Provides stable 3.0 V excitation and ADC reference for ratiometric sensor measurements. Use Value: AEC-Q100 Grade 1 rating and −40°C to +125°C operation ensure reliability in under-hood environments; ±0.1% accuracy minimizes calibration drift over lifetime. | Use Scenario: Precision reference in handheld multimeters and portable oscilloscope probes. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference for 16-bit SAR ADCs and programmable gain amplifiers. Use Value: 285 µVPP (0.1–10 Hz) noise and 75 ppm/°C tempco enable sub-LSB measurement accuracy across temperature; 60 µA supply current extends battery runtime. |
| Industrial Process Control Transmitters | Battery-Powered Medical Devices |
Use Scenario: Reference voltage source in 4–20 mA loop-powered field transmitters for pressure and flow sensing. IC Role / Device Role / Timing Role: Generates accurate 3.0 V reference for DACs and current-sense amplifiers within strict 3.6 V supply constraints. Use Value: 400 mV dropout allows operation from minimal headroom supplies; enable pin supports low-power wake-up protocols compliant with HART communication standards. | Use Scenario: Reference for ECG front-end ADCs and glucose meter analog signal chains in wearable diagnostic devices. IC Role / Device Role / Timing Role: Delivers ultra-stable 3.0 V reference for biopotential amplification and digitization with minimal self-heating. Use Value: 50 ppm long-term stability (1000 hrs) and 75 µV thermal hysteresis ensure clinical-grade repeatability; RoHS/SN finish supports medical regulatory compliance. |
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 supply current, SOT-23-5 | Lower quiescent current but looser accuracy and higher tempco; not AEC-Q100 qualified | Select for cost-sensitive industrial designs where Grade A accuracy and automotive qualification are not required |
| ADR3430ARJZ-R7 | 3.0 V, ±0.1% initial accuracy, 10 ppm/°C max tempco, 120 µA supply current, SOT-23-5 | Superior tempco and noise (12 µVPP), but higher supply current and no enable pin | Select for lab-grade instrumentation needing ultra-low drift, where shutdown control is handled externally |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, LM4128AQ1MFX3.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, enable-controlled 3 µA shutdown, and 75 ppm/°C tempco in a single SOT-23-5 package-making it optimal for automotive and portable systems requiring both precision and power-state agility.
Availability
LM4128AQ1MFX3.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable test equipment, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4128AQ1MFX3.0/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.
LM4128AQ1MFX3.0/NOPB belongs to TI's precision voltage reference product line, designed specifically for space-constrained, low-power, high-accuracy applications in automotive, industrial, and portable electronics where reliability across extreme temperatures is mandatory.
FAQ
What is the maximum input voltage for LM4128AQ1MFX3.0/NOPB?
The maximum input voltage for LM4128AQ1MFX3.0/NOPB is 5.5 V, as specified in the Absolute Maximum Ratings and Operating Ratings sections of the datasheet. Operation above this voltage risks permanent damage. The device requires a minimum input of VREF + 400 mV (i.e., 3.4 V) for proper regulation at 10 mA load, making it compatible with standard 3.3 V and 5 V supply rails.
Does LM4128AQ1MFX3.0/NOPB require an input capacitor?
Yes, LM4128AQ1MFX3.0/NOPB requires an input capacitor (CIN) for stable operation. The datasheet specifies CIN ≥ COUT, and if no output capacitor is used, CIN must be at least 0.1 µF. A ceramic X5R or X7R capacitor placed close to the VIN and GND pins is recommended to suppress supply noise and improve transient response.
What is the function of Pin 1 (N/C) on LM4128AQ1MFX3.0/NOPB?
Pin 1 on LM4128AQ1MFX3.0/NOPB is a no-connect (N/C) terminal with no internal connection. It must be left floating and unconnected on the PCB. Routing traces or soldering to this pin may introduce parasitic coupling or mechanical stress that could affect output voltage stability or long-term reliability.
How does the enable pin (EN) of LM4128AQ1MFX3.0/NOPB operate?
The enable pin (Pin 3) of LM4128AQ1MFX3.0/NOPB is referenced to VIN, not ground. It activates the reference when pulled to ≥65% of VIN and disables it (entering 3 µA shutdown) when pulled to ≤35% of VIN. Leaving EN unconnected leverages an internal ~2 µA pull-up to VIN, keeping the device enabled by default. Driving EN directly from a microcontroller GPIO is valid only if the GPIO rail matches VIN.
Is LM4128AQ1MFX3.0/NOPB suitable for driving 20 mA loads continuously?
Yes, LM4128AQ1MFX3.0/NOPB is rated for continuous output currents up to 20 mA across its full operating temperature range (−40°C to +125°C), as confirmed in the Operating Ratings and Electrical Characteristics tables. At 20 mA, dropout remains ≤400 mV, and output voltage deviation due to load regulation is limited to 120 ppm/mA - ensuring stable 3.0 V operation in buffer and DAC reference applications.
LM4128AQ1MFX3.0/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:
- ±0.1%
- 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
LM4128AQ1MFX3.0/NOPB FAQ
1.How can I place an order for LM4128AQ1MFX3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128AQ1MFX3.0/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 LM4128AQ1MFX3.0/NOPB reliable?
The price and inventory of LM4128AQ1MFX3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128AQ1MFX3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128AQ1MFX3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128AQ1MFX3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128AQ1MFX3.0/NOPB?
LM4128AQ1MFX3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128AQ1MFX3.0/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 LM4128AQ1MFX3.0/NOPB?
For technical support, including LM4128AQ1MFX3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128AQ1MFX3.0/NOPB requirements.
6.How does Aetrix verify that LM4128AQ1MFX3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128AQ1MFX3.0/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 LM4128AQ1MFX3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128AQ1MFX3.0/NOPB?
All LM4128AQ1MFX3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128AQ1MFX3.0/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 LM4128AQ1MFX3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128AQ1MFX3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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