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Texas Instruments LM4128AQ1MFX1.8/NOPB
- Part No.:
- LM4128AQ1MFX1.8/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128AQ1MFX1.8/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,314
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Product details
Overview
LM4128AQ1MFX1.8/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified, precision micropower series voltage reference in a 5-pin SOT-23 package, delivering 1.8 V output with ±0.1% initial accuracy, 75 ppm/°C max temperature coefficient, and 60 µA supply current. It enables battery-powered instrumentation requiring stable low-drift references with shutdown capability.
For engineers reviewing the LM4128AQ1MFX1.8/NOPB datasheet, LM4128AQ1MFX1.8/NOPB pinout, LM4128AQ1MFX1.8/NOPB application, or LM4128AQ1MFX1.8/NOPB equivalent, this page provides verified electrical specs, automotive-grade thermal performance, enable-controlled power management, and real-world load regulation behavior across −40°C to +125°C.
Technical Context
The LM4128AQ1MFX1.8/NOPB uses an internal band-gap-derived architecture optimized for low quiescent current and minimal dropout (200–400 mV at 10 mA). Its enable pin controls a 3–7 µA shutdown mode without requiring external circuitry, and it operates stably with capacitive loads up to 10 µF while eliminating need for output stabilization capacitors.
Designed for automotive and industrial environments, it features guaranteed −40°C to +125°C junction temperature operation, 50 ppm long-term stability over 1000 hours, and thermal hysteresis of ≤75 ppm - all validated per AEC-Q100 Grade 1 requirements on an automotive-grade manufacturing flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V nominal, ±0.1% initial accuracy ensures <±1.8 mV absolute error at 25°C for high-resolution ADC/DAC biasing |
| Tempco | 75 ppm/°C max (A grade) limits drift to <±13.5 mV over −40°C to +125°C ambient range |
| Supply Current | 60 µA typical active current enables >10-year battery life in 10 µA-sleep systems with periodic wake-up |
| Shutdown Current | 3–7 µA when EN = 0 V, reducing standby power by >90% vs active mode |
| Dropout Voltage | 200 mV min / 400 mV max at 10 mA load allows operation from 2.0 V input - compatible with single-cell LiFePO₄ or dual-cell alkaline supplies |
| Load Regulation | 25–120 ppm/mA ensures <±0.22 mV output shift across full 0–20 mA load range |
| Noise (0.1–10 Hz) | 170 µVPP supports 16-bit+ data acquisition without added filtering |
Pinout & Package
LM4128AQ1MFX1.8/NOPB is housed in a RoHS-compliant 5-pin SOT-23 (DBV) package with 220°C/W junction-to-ambient thermal resistance, rated for −40°C to +125°C operation and compatible with standard reflow profiles (MSL Level-1).
| 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; VIH ≥65% VIN, VIL ≤35% VIN; drives internal regulator into 3–7 µA shutdown state when low |
| 4 - VIN | Input supply rail | Accepts 2.2 V to 5.5 V (VREF + 400 mV min); must be bypassed with ≥0.1 µF ceramic capacitor |
| 5 - VREF | Precision reference output | 1.8 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 −40°C to +125°C operation and process traceability |
| Enable-controlled shutdown | Reduces supply current from 60 µA to 3–7 µA, enabling ultra-low-power duty-cycled sensor nodes |
| No external output capacitor required | Stable with 0–10 µF capacitive loads, simplifying layout and reducing BOM count in space-constrained modules |
| Low dropout voltage | 200 mV minimum at 10 mA enables use with low-voltage batteries (e.g., 2.0 V cutoff LiFePO₄) |
| Indefinite short-circuit protection | Limits output current to 75 mA during fault conditions, preventing thermal runaway or damage |
Applications
| Portable Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Handheld multimeter or portable gas analyzer operating from two AA cells with intermittent measurement cycles. IC Role / Device Role / Timing Role: Provides stable 1.8 V reference for 16-bit SAR ADC and microcontroller VREF input. Use Value: ±0.1% initial accuracy and 75 ppm/°C tempco ensure <±0.5 LSB error over full temperature range without calibration. |
Use Scenario: Engine coolant temperature sensor interface in engine control unit (ECU) with CAN bus reporting. IC Role / Device Role / Timing Role: Supplies precision bias for RTD-to-digital signal chain under harsh under-hood thermal cycling. Use Value: AEC-Q100 Grade 1 qualification and 50 ppm long-term stability guarantee consistent offset compensation over 15-year vehicle lifetime. |
| Industrial Data Acquisition Modules | Medical Point-of-Care Devices |
|
Use Scenario: DIN-rail mounted analog input module acquiring 4–20 mA loop signals across multiple channels. IC Role / Device Role / Timing Role: Delivers common 1.8 V reference for multi-channel simultaneous sampling ADCs with shared reference architecture. Use Value: Load regulation of 25 ppm/mA prevents channel-to-channel gain mismatch when driving multiple ADC reference inputs. |
Use Scenario: Portable ECG monitor powered by rechargeable Li-ion battery with sleep/wake operation. IC Role / Device Role / Timing Role: Supplies low-noise 1.8 V reference for front-end instrumentation amplifier and delta-sigma ADC. Use Value: 170 µVPP (0.1–10 Hz) noise floor supports >90 dB SNR without additional filtering, preserving diagnostic waveform fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3018AIDBZR | Fixed 1.8 V, 50 ppm/°C max tempco, 50 µA supply current, no enable pin, SOT-23-3 package | Lacks shutdown control and has no enable functionality; smaller footprint but no power-gating capability | Select when board space is critical and continuous operation is acceptable; not suitable for duty-cycled systems |
| MAX6029AEUR+T | 1.8 V, ±0.2% initial accuracy, 100 ppm/°C tempco, 35 µA supply current, no enable, SOT-23-3 | Lower accuracy and higher tempco than LM4128AQ1MFX1.8/NOPB; no automotive qualification | Choose for cost-sensitive non-automotive applications where ±0.2% accuracy suffices and AEC-Q100 is not required |
Compared with REF3018AIDBZR and MAX6029AEUR+T, LM4128AQ1MFX1.8/NOPB uniquely combines AEC-Q100 Grade 1 compliance, enable-controlled shutdown, and ±0.1% accuracy in a 5-pin SOT-23 - making it the only option among the three qualified for safety-critical automotive subsystems requiring power gating.
Availability
LM4128AQ1MFX1.8/NOPB is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable instrumentation, and industrial data acquisition systems requiring stable component supply with full traceability and long-lifecycle support.
Supply support for LM4128AQ1MFX1.8/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.
LM4128AQ1MFX1.8/NOPB belongs to TI's precision voltage reference product line, designed specifically for high-accuracy, low-power, and automotive-qualified applications demanding long-term stability and thermal robustness.
FAQ
What is the maximum load current supported by LM4128AQ1MFX1.8/NOPB?
The LM4128AQ1MFX1.8/NOPB supports up to 20 mA output current while maintaining specified accuracy and regulation. At 10 mA load, dropout voltage is guaranteed ≤400 mV, and load regulation is bounded at 25–120 ppm/mA - ensuring predictable performance in active biasing and DAC reference roles.
Does LM4128AQ1MFX1.8/NOPB require an external output capacitor?
No, LM4128AQ1MFX1.8/NOPB is internally compensated and stable with 0–10 µF capacitive loads, eliminating mandatory output capacitance. An optional COUT improves load transient response but extends turn-on time; CIN ≥0.1 µF ceramic capacitor remains mandatory for input stability.
What does the "Q" suffix in LM4128AQ1MFX1.8/NOPB signify?
The "Q" denotes AEC-Q100 qualification, and "AQ" confirms Grade 1 rating (−40°C to +125°C operation). LM4128AQ1MFX1.8/NOPB is manufactured on an automotive-grade flow with enhanced process controls, lot traceability, and reliability testing per AEC-Q100 Rev H requirements.
How does the enable pin (EN) function on LM4128AQ1MFX1.8/NOPB?
The EN pin is active-high: applying ≥65% of VIN enables normal operation (60 µA supply current); pulling ≤35% of VIN disables the reference, reducing supply current to 3–7 µA. Internal pull-up (~2 µA) allows direct connection to VIN for always-on use, or microcontroller GPIO for controlled power gating.
Is LM4128AQ1MFX1.8/NOPB compatible with standard SOT-23 PCB footprints?
Yes, LM4128AQ1MFX1.8/NOPB uses the industry-standard 5-pin SOT-23 (DBV) package with 0.95 mm pitch and 2.9 mm × 1.6 mm body size. It matches JEDEC MO-178AB and TI's DBV package drawing, supporting automated placement and reflow using MSL Level-1 profile (260°C peak).
LM4128AQ1MFX1.8/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):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- 170µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.2V ~ 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
LM4128AQ1MFX1.8/NOPB FAQ
1.How can I place an order for LM4128AQ1MFX1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128AQ1MFX1.8/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 LM4128AQ1MFX1.8/NOPB reliable?
The price and inventory of LM4128AQ1MFX1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128AQ1MFX1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128AQ1MFX1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128AQ1MFX1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128AQ1MFX1.8/NOPB?
LM4128AQ1MFX1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128AQ1MFX1.8/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 LM4128AQ1MFX1.8/NOPB?
For technical support, including LM4128AQ1MFX1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128AQ1MFX1.8/NOPB requirements.
6.How does Aetrix verify that LM4128AQ1MFX1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128AQ1MFX1.8/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 LM4128AQ1MFX1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128AQ1MFX1.8/NOPB?
All LM4128AQ1MFX1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128AQ1MFX1.8/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 LM4128AQ1MFX1.8/NOPB part is unused and in its original packaging.
Return procedure for LM4128AQ1MFX1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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