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Texas Instruments LM4128AQ1MF2.0/NOPB
- Part No.:
- LM4128AQ1MF2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128AQ1MF2.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,083
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Product details
Overview
LM4128AQ1MF2.0/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified, precision micropower series voltage reference in a 5-pin SOT-23 package, delivering 2.048 V output with ±0.1% initial accuracy, 75 ppm/°C max temperature coefficient, and 60 µA supply current. It enables low-power, high-stability analog signal conditioning in automotive sensor interfaces and battery-powered data acquisition systems.
For engineers reviewing the LM4128AQ1MF2.0/NOPB datasheet, LM4128AQ1MF2.0/NOPB pinout, LM4128AQ1MF2.0/NOPB application, or LM4128AQ1MF2.0/NOPB equivalent, key selection criteria include its automotive-grade qualification, enable-controlled shutdown (3 µA), 400 mV dropout at 10 mA, stability with up to 10 µF capacitive loads, and compatibility with low-ESR ceramic bypass capacitors.
Technical Context
The LM4128AQ1MF2.0/NOPB employs a band-gap–based series reference architecture with internal enable logic, supporting operation from VIN = VREF + 400 mV to 5.5 V. Its design eliminates need for external stabilization capacitors while maintaining stability across load currents up to 20 mA and capacitive loads up to 10 µF.
It features rail-to-rail enable functionality (VIH = 65% VIN, VIL = 35% VIN), indefinite short-circuit protection (75 mA limit), and thermal hysteresis of ≤75 ppm over −40°C to +125°C. The device meets AEC-Q100 Grade 1 requirements and is manufactured on an automotive-grade flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.1% (A-grade initial accuracy ensures <±2.05 mV error at 25°C) |
| Tempco | 75 ppm/°C max (≤±0.19 mV drift over −40°C to +125°C) |
| Supply Current | 60 µA typical (enables >10-year battery life in 10 µA-sleep systems) |
| Shutdown Current | 3–7 µA (EN = 0 V; reduces system standby power by >95% vs active mode) |
| Dropout Voltage | 175–400 mV at 10 mA (supports operation from 2.223 V input in low-voltage systems) |
| Load Regulation | 25–120 ppm/mA (≤±0.25 mV shift from 0 to 20 mA load) |
| Noise (0.1–10 Hz) | 190 µVPP (suitable for 16-bit ADC reference without external filtering) |
Pinout & Package
LM4128AQ1MF2.0/NOPB uses the 5-pin SOT-23 (DBV) package - compact, surface-mount, thermally enhanced for automotive environments. Pin 1 is NC (no connect); pins are arranged top-view with standard DBV pinout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | 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 connection |
| 3 (EN) | Enable control input | Active-high logic input; pulls up internally (~2 µA); drives device into 3–7 µA shutdown when low |
| 4 (VIN) | Input supply rail | Accepts 2.448 V to 5.5 V (VREF + 400 mV min); powers internal band-gap and output stage |
| 5 (VREF) | Precision reference output | 2.048 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 operating from −40°C to +125°C junction temperature |
| No external stabilization capacitor required | Stable with all load conditions up to 10 µF; simplifies layout and reduces BOM count |
| Low dropout (175 mV typ) | Enables use with single-cell Li-ion (3.0 V) or dual-cell alkaline (3.2 V) supplies |
| Indefinite short-circuit protection | Self-limits output current to 75 mA; recovers automatically after fault removal |
| Stable with low-ESR ceramic capacitors | Compatible with X5R/X7R MLCCs; avoids instability risks of tantalum or electrolytic types |
Applications
| Automotive Sensor Signal Conditioning | Portable Data Acquisition Front-End |
|---|---|
Use Scenario: High-accuracy temperature, pressure, and position sensing in engine control units and ADAS modules. IC Role / Device Role / Timing Role: Precision 2.048 V reference for 12-/16-bit SAR ADCs driving sensor signal chains. Use Value: ±0.1% initial accuracy and 75 ppm/°C tempco ensure <±0.5 LSB error over full automotive temperature range. |
Use Scenario: Battery-powered handheld meters and IoT edge nodes requiring long runtime and measurement repeatability. IC Role / Device Role / Timing Role: Low-quiescent-current reference enabling microamp-level sleep modes while preserving calibration integrity. Use Value: 60 µA active current and 3 µA shutdown current extend coin-cell life beyond 5 years in intermittent-read applications. |
| Industrial Process Controller Analog I/O | Medical Instrumentation Reference Subsystem |
Use Scenario: 4–20 mA transmitter modules and PLC analog input cards needing stable excitation and conversion references. IC Role / Device Role / Timing Role: Primary voltage reference for DACs, op-amp gain-setting, and RTD/thermocouple front-end biasing. Use Value: Load regulation ≤120 ppm/mA and line regulation ≤30 ppm/V minimize span error under varying field power conditions. |
Use Scenario: Portable ECG, pulse oximeter, and glucose meter designs demanding clinical-grade DC accuracy and low noise. IC Role / Device Role / Timing Role: Low-noise (190 µVPP, 0.1–10 Hz), drift-stable reference for high-resolution biopotential amplifiers and ADCs. Use Value: Long-term stability ≤50 ppm/1000 hrs and thermal hysteresis ≤75 ppm ensure calibration retention between patient sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, ±0.2% initial accuracy, 100 ppm/°C, 50 µA IQ, SOT-23-3 (no EN pin) | Lacks enable control and automotive qualification; lower accuracy grade | Choose for cost-sensitive, non-automotive, always-on applications where shutdown is unnecessary |
| MAX6029AESA20+ | 2.048 V, ±0.1% initial accuracy, 50 ppm/°C, 65 µA IQ, SO-8 package | SO-8 footprint; higher tempco spec but tighter distribution; no AEC-Q100 rating | Prefer when board space allows larger package and ultra-low tempco is prioritized over automotive compliance |
Compared with REF3020AIDBZR and MAX6029AESA20+, the LM4128AQ1MF2.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, integrated enable, and SOT-23-5 packaging-making it the only drop-in solution for space-constrained automotive analog front-ends requiring guaranteed shutdown capability and production traceability.
Availability
LM4128AQ1MF2.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical devices, and industrial process controllers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4128AQ1MF2.0/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
The LM4128 family was designed specifically for high-accuracy, low-power, automotive-qualified voltage referencing in safety-critical and space-constrained systems-emphasizing stability, enable control, and robustness across −40°C to +125°C.
FAQ
What is the maximum input voltage for LM4128AQ1MF2.0/NOPB?
The LM4128AQ1MF2.0/NOPB supports a maximum input voltage of 5.5 V across its full 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 may cause permanent damage. For reliable operation, VIN must also remain ≥ VREF + 400 mV (i.e., ≥2.448 V at 25°C) to maintain regulation.
Does LM4128AQ1MF2.0/NOPB require an input capacitor?
Yes - LM4128AQ1MF2.0/NOPB requires a minimum 0.1 µF ceramic input capacitor (CIN) connected between VIN and GND. Per TI's application guidance, CIN must be ≥ COUT if an output capacitor is used. Omitting CIN risks instability, startup overshoot, and degraded noise performance. X5R or X7R dielectrics are recommended for stable ESR across temperature.
Is LM4128AQ1MF2.0/NOPB pin-compatible with other LM4128 variants?
Yes - all LM4128xMF-x.x/NOPB variants (including LM4128AQ1MF2.0/NOPB) share identical 5-pin SOT-23 (DBV) packaging and pinout: Pin 1 (NC), Pin 2 (GND), Pin 3 (EN), Pin 4 (VIN), Pin 5 (VREF). Voltage option (e.g., 2.048 V vs 2.5 V) and grade (A/B/C/D) do not affect mechanical or electrical pin compatibility.
What is the typical turn-on time for LM4128AQ1MF2.0/NOPB?
The typical turn-on time for LM4128AQ1MF2.0/NOPB is 33.2 µs when driving a 1 µF capacitive load, and 78.8 µs with a 10 µF load - measured from EN rising to 90% of final 2.048 V output. Under cold-start or brown-out conditions (−40°C, low VIN), turn-on may extend up to 10 ms due to internal bias settling delays.
Can LM4128AQ1MF2.0/NOPB drive a 10 kΩ load continuously?
Yes - LM4128AQ1MF2.0/NOPB can continuously source up to 20 mA, corresponding to a minimum resistive load of 102.4 Ω at 2.048 V. A 10 kΩ load draws only 204.8 µA, well within specification. Output voltage deviation under this load remains ≤±0.025 mV (25 ppm/mA × 0.2048 mA), per load regulation specs.
LM4128AQ1MF2.0/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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- 190µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.448V ~ 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
LM4128AQ1MF2.0/NOPB FAQ
1.How can I place an order for LM4128AQ1MF2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128AQ1MF2.0/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 LM4128AQ1MF2.0/NOPB reliable?
The price and inventory of LM4128AQ1MF2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128AQ1MF2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128AQ1MF2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128AQ1MF2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128AQ1MF2.0/NOPB?
LM4128AQ1MF2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128AQ1MF2.0/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 LM4128AQ1MF2.0/NOPB?
For technical support, including LM4128AQ1MF2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128AQ1MF2.0/NOPB requirements.
6.How does Aetrix verify that LM4128AQ1MF2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128AQ1MF2.0/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 LM4128AQ1MF2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128AQ1MF2.0/NOPB?
All LM4128AQ1MF2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128AQ1MF2.0/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 LM4128AQ1MF2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128AQ1MF2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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