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Texas Instruments LM4128DQ1MFX3.0/NOPB
- Part No.:
- LM4128DQ1MFX3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DQ1MFX3.0/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,965
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Product details
Overview
LM4128DQ1MFX3.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 3.0 V output with ±1.0% initial accuracy (Grade D), 100 ppm/°C max temperature coefficient, and 60 µA supply current. It features an enable pin for 3–7 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 LM4128DQ1MFX3.0/NOPB datasheet, LM4128DQ1MFX3.0/NOPB pinout, LM4128DQ1MFX3.0/NOPB application, or LM4128DQ1MFX3.0/NOPB equivalent, key selection criteria include dropout voltage (≤400 mV at 10 mA), stability with capacitive loads up to 10 µF, no external stabilizing capacitor requirement, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4128DQ1MFX3.0/NOPB uses a band-gap–derived reference core optimized for low quiescent current and high PSRR. Its enable-controlled architecture allows seamless integration into power-gated systems, with VIN range of 3.4 V to 5.5 V (VREF + 400 mV min) and guaranteed operation across −40°C to +125°C junction temperature.
It achieves stable regulation without external compensation, supporting ceramic COUT up to 10 µF while maintaining ≤0.5% output deviation. The N/C pin (Pin 1) must remain unconnected, and input capacitance ≥0.1 µF (CIN) is mandatory for stability - unlike shunt references, it draws only 60 µA under load and drops to ≤7 µA in shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±1.0% initial accuracy (Grade D) - ensures reliable ADC/DAC biasing in cost-sensitive industrial sensors |
| Temperature Coefficient | 100 ppm/°C max - limits drift to ±0.36 mV over −40°C to +125°C, suitable for non-critical precision applications |
| Supply Current | 60 µA typical - enables multi-year battery life in portable data loggers drawing <100 µA average current |
| Shutdown Current | 3–7 µA with EN = 0 V - allows deep-sleep modes in automotive ECUs without compromising wake-up latency |
| Dropout Voltage | ≤400 mV at 10 mA load - permits operation from single-cell Li-ion (3.0–4.2 V) or 3.3 V rails with margin |
| Load Regulation | 25–120 ppm/mA - maintains ≤0.36 mV error across 0–20 mA load, sufficient for driving op-amp bias networks |
| Noise (0.1–10 Hz) | 285 µVPP - compatible with 12-bit SAR ADCs requiring <1 LSB noise at 3 V full-scale |
Pinout & Package
LM4128DQ1MFX3.0/NOPB is housed in a 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 no-connect (N/C); all other pins are electrically active and require correct PCB routing per functional role.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N/C) | No-connect terminal | Must remain floating - solder mask opening required; no trace or pad connection permitted |
| 2 (GND) | Analog ground reference | Low-impedance return path for reference core; requires dedicated ground plane tie near device |
| 3 (EN) | Enable control input | Active-high logic: VIH ≥65% VIN, VIL ≤35% VIN - drives internal pass element; pull-up not required |
| 4 (VIN) | Input supply rail | Accepts 3.4–5.5 V; minimum headroom 400 mV above VREF ensures regulation integrity at full load |
| 5 (VREF) | Precision output terminal | 3.0 V reference source; requires local 0.1 µF ceramic bypass if COUT omitted; stable with 10 µF COUT |
Key Features
| Feature | Design Value |
|---|---|
| Grade D AEC-Q100 qualification | LM4128DQ variant meets Grade 1 automotive reliability standards (−40°C to +125°C), enabling use in engine control modules and ADAS sensors |
| No external stabilization capacitor | Eliminates need for output compensation network - reduces BOM count and layout area in space-constrained modules like tire pressure sensors |
| Indefinite short-circuit protection | Limits output current to 75 mA during fault - prevents thermal runaway when VREF is accidentally shorted in production test fixtures |
| Stable with 10 µF capacitive load | Enables direct drive of large decoupling caps on downstream LDOs or ADC analog supplies without oscillation risk |
| Low ESR ceramic capacitor support | Validated with X5R/X7R dielectrics - avoids aging-related drift issues common with tantalum or aluminum electrolytics in long-life equipment |
Applications
| Portable Data Acquisition | Automotive Sensor Interface |
|---|---|
Use Scenario: Battery-powered handheld multimeter sampling thermocouples and RTDs via 12-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for ADC conversion and op-amp signal conditioning stages. Use Value: 60 µA supply current extends alkaline battery life beyond 2 years; 100 ppm/°C tempco keeps measurement error <±0.5°C over operating range. |
Use Scenario: Front-end signal conditioning for exhaust gas oxygen (EGO) sensor in Tier 1 powertrain control unit. IC Role / Device Role / Timing Role: Supplies precision bias voltage to differential amplifier driving CAN transceiver analog front end. Use Value: AEC-Q100 Grade 1 rating ensures reliability at 125°C junction; enable pin synchronizes reference activation with MCU wake-up sequence. |
| Industrial Process Controller | Medical Vital Sign Monitor |
Use Scenario: 4–20 mA loop-powered transmitter measuring pressure in oil & gas pipeline monitoring system. IC Role / Device Role / Timing Role: Sets reference for DAC generating loop current and for internal ADC monitoring supply rail. Use Value: Dropout ≤400 mV allows operation from 3.3 V isolated DC-DC converter; 20 mA output drives DAC and sensing circuitry simultaneously. |
Use Scenario: Portable ECG module acquiring biopotential signals with 16-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Delivers low-noise 3.0 V reference for ADC reference input and analog front-end PGA gain-setting resistors. Use Value: 285 µVPP (0.1–10 Hz) noise contributes <0.05% of full-scale error; long-term stability ≤50 ppm/1000 hrs ensures calibration validity over 6-month service intervals. |
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 (Grade A), 50 ppm/°C, 50 µA IQ, SOT-23-5 - tighter accuracy/tempco but no enable pin | Preferred where higher precision is required and shutdown control is handled externally (e.g., via LDO EN) | Select REF3030AIDBZR for medical-grade accuracy; LM4128DQ1MFX3.0/NOPB for cost-sensitive automotive Grade 1 designs needing integrated enable |
| MAX6029AEUR+T | 3.0 V, ±0.1% initial accuracy, 30 ppm/°C, 65 µA IQ, SOT-23-5 - superior tempco and accuracy, but not AEC-Q100 qualified | Suitable for industrial test equipment where extended temp range is less critical than long-term drift | Choose MAX6029AEUR+T for lab-grade instrumentation; LM4128DQ1MFX3.0/NOPB for production automotive modules requiring certified reliability |
Compared with REF3030AIDBZR and MAX6029AEUR+T, the LM4128DQ1MFX3.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, integrated enable functionality, and cost-optimized Grade D accuracy - making it the only drop-in solution for automotive body electronics where functional safety compliance and power sequencing are mandatory.
Availability
LM4128DQ1MFX3.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable instrumentation, and industrial process controllers requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LM4128DQ1MFX3.0/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 product development.
The LM4128 family was engineered specifically for space-constrained, battery-operated, and automotive applications demanding low power, high reliability, and simplified layout - emphasizing ease of use through inherent stability and minimal external components.
FAQ
What is the maximum input voltage for LM4128DQ1MFX3.0/NOPB?
The LM4128DQ1MFX3.0/NOPB supports a maximum input voltage of 5.5 V across its operating temperature range. This limit is specified in the Absolute Maximum Ratings table and applies regardless of load or enable state. Exceeding 5.5 V risks permanent damage to the internal band-gap circuitry and is not recoverable. Always ensure VIN remains within 3.4 V to 5.5 V for proper regulation.
Does LM4128DQ1MFX3.0/NOPB require an external output capacitor?
No, the LM4128DQ1MFX3.0/NOPB is designed to operate stably without an external output capacitor. However, adding a 0.1–10 µF ceramic capacitor (COUT) between VREF and GND improves load transient response and reduces output noise. When used, COUT must be low-ESR X5R/X7R type and placed close to the device - the LM4128DQ1MFX3.0/NOPB remains stable even with 10 µF COUT.
What does the 'DQ' suffix in LM4128DQ1MFX3.0/NOPB indicate?
The 'DQ' suffix identifies the LM4128DQ1MFX3.0/NOPB as the automotive-grade variant with Grade D accuracy (±1.0% initial tolerance) and AEC-Q100 Grade 1 qualification. It is manufactured on TI's automotive flow and tested across −40°C to +125°C junction temperature. The 'Q' confirms automotive qualification; 'D' specifies the accuracy grade - distinct from LM4128AMF-3.0/NOPB (Grade A, ±0.1%).
Can LM4128DQ1MFX3.0/NOPB drive a 20 mA load continuously?
Yes, the LM4128DQ1MFX3.0/NOPB is rated for continuous 20 mA output current per Electrical Characteristics. At this load and TJ = 25°C, dropout remains ≤400 mV, and output voltage deviation stays within ±0.5% of 3.0 V. Thermal derating applies above 25°C ambient - at 125°C junction, maximum sustainable load is ~12 mA with adequate PCB copper pour to maintain safe operating area.
Is Pin 1 of LM4128DQ1MFX3.0/NOPB internally connected?
No, Pin 1 of LM4128DQ1MFX3.0/NOPB is a true no-connect (N/C) terminal. The datasheet explicitly states "No connect pin, leave floating" and warns against routing traces or applying solder to this pad. Connecting Pin 1 to any net - including GND or VIN - may cause unpredictable behavior or parametric shift due to internal parasitic coupling. PCB layout must omit solder mask and copper for Pin 1.
LM4128DQ1MFX3.0/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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128DQ1MFX3.0/NOPB FAQ
1.How can I place an order for LM4128DQ1MFX3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DQ1MFX3.0/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 LM4128DQ1MFX3.0/NOPB reliable?
The price and inventory of LM4128DQ1MFX3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128DQ1MFX3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DQ1MFX3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DQ1MFX3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DQ1MFX3.0/NOPB?
LM4128DQ1MFX3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DQ1MFX3.0/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 LM4128DQ1MFX3.0/NOPB?
For technical support, including LM4128DQ1MFX3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DQ1MFX3.0/NOPB requirements.
6.How does Aetrix verify that LM4128DQ1MFX3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DQ1MFX3.0/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 LM4128DQ1MFX3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DQ1MFX3.0/NOPB?
All LM4128DQ1MFX3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DQ1MFX3.0/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 LM4128DQ1MFX3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128DQ1MFX3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128DQ1MFX3.0/NOPB Tags
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