My Inquiry
My Account
Texas Instruments LM4128AQ1MFX2.0/NOPB
- Part No.:
- LM4128AQ1MFX2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128AQ1MFX2.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,724
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4128AQ1MFX2.0/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 temperature coefficient, and 60 µA supply current. It supports 20 mA output current, features an enable pin for 3 µA shutdown mode, and operates across −40°C to +125°C - ideal for automotive sensor signal conditioning and battery-powered instrumentation.
For engineers reviewing the LM4128AQ1MFX2.0/NOPB datasheet, LM4128AQ1MFX2.0/NOPB pinout, LM4128AQ1MFX2.0/NOPB application, or LM4128AQ1MFX2.0/NOPB equivalent, key selection criteria include its automotive-grade qualification, low dropout (≤400 mV at 10 mA), stability with up to 10 µF capacitive loads, and absence of required external stabilization capacitor.
Technical Context
The LM4128AQ1MFX2.0/NOPB uses an internal band-gap-derived reference architecture optimized for low quiescent current and high PSRR. Its enable input controls a precision bias network that reduces supply current to ≤7 µA in shutdown while maintaining fast turn-on time (typically 33.2 µs into 1 µF).
It operates as a series reference with VIN ≥ VREF + 400 mV (i.e., ≥2.448 V at 10 mA load), delivers stable output under load transients up to 20 mA, and maintains specified accuracy over full −40°C to +125°C junction temperature range without external compensation.
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 (≤±18.8 µV/°C drift over −40°C to +125°C) |
| Supply Current | 60 µA typical (enables >10-year battery life in 10 µA-systems) |
| Shutdown Current | 3–7 µA (EN = 0 V; enables ultra-low-power sleep modes) |
| Dropout Voltage | 175–400 mV at 10 mA (supports operation from single Li-ion or 3.3 V rail) |
| Load Regulation | 25–120 ppm/mA (≤±245 µV change over 0–20 mA load step) |
| Noise (0.1–10 Hz) | 190 µVPP (suitable for 16-bit ADC reference in precision DAQ) |
Pinout & Package
LM4128AQ1MFX2.0/NOPB is housed in a RoHS-compliant, lead-free 5-pin SOT-23 (DBV) package with 1.27 mm pitch, rated for −40°C to +125°C operation and MSL Level-1 reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected and floating; no internal connection |
| 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 bias network |
| 4 - VIN | Input supply | Accepts 2.448 V to 5.5 V; must exceed VREF by ≥400 mV for full-load regulation |
| 5 - VREF | Precision reference output | 2.048 V source capable of sourcing/sinking 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 requiring −40°C to +125°C operation and robust reliability |
| No external stabilization capacitor required | Internally compensated design eliminates need for CCOMP, reducing BOM count and board space |
| Stable with up to 10 µF capacitive loads | Enables direct driving of ADC reference inputs or LDO feedback networks without phase-margin risk |
| Indefinite short-circuit protection | Current-limited to 75 mA during output fault; recovers automatically upon fault removal |
| Low thermal hysteresis (75 ppm) | Ensures repeatable output voltage after thermal cycling between −40°C and +125°C |
Applications
| Automotive Sensor Signal Conditioning | Portable Precision Data Acquisition |
|---|---|
Use Scenario: Providing stable excitation and reference for MEMS pressure sensors and RTD interfaces in engine control units. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric ADC measurement and analog front-end biasing. Use Value: ±0.1% initial accuracy and 75 ppm/°C tempco maintain <0.05% total system gain error over automotive temperature range. |
Use Scenario: Reference source for handheld multimeters and portable oscilloscope front-ends powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power series reference enabling >500-hour runtime with 20 mA peak load capability. Use Value: 60 µA quiescent current and 3 µA shutdown mode extend battery life while supporting fast wake-up (<100 µs). |
| Industrial Process Transmitters | Battery-Powered Medical Sensors |
Use Scenario: 4–20 mA loop-powered transmitter requiring precise 2.048 V reference for DAC and sensor excitation. IC Role / Device Role / Timing Role: Primary reference for 12-bit DAC and bridge-sensor amplifier in isolated 2-wire systems. Use Value: Dropout ≤400 mV allows operation directly from loop-supplied 3.3 V rail with margin for line drop. |
Use Scenario: Reference for ECG/EEG analog front-ends in wearable patch monitors using rechargeable Li-Po cells. IC Role / Device Role / Timing Role: Low-noise (190 µVPP) reference for 16-bit delta-sigma ADC in biopotential acquisition. Use Value: 0.1 Hz–10 Hz noise performance meets IEC 60601-2-27 requirements for clinical-grade biosignal 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 |
|---|---|---|---|
| MAX6126AASA20+ | 2.048 V, ±0.06% initial accuracy, 3 ppm/°C tempco, 0.9 µA IQ, but 8-pin SOIC package | Higher precision and lower drift, but larger footprint and no enable pin | Select when ultra-low tempco and long-term stability outweigh size and power-control needs |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA IQ, SOT-23-5, no enable pin | Lower tempco than LM4128AQ1MFX2.0/NOPB but higher supply current and no shutdown mode | Select when tighter temperature drift is critical and system-level power gating replaces IC-level enable |
Compared with MAX6126AASA20+ and ADR3420ARJZ-R7, LM4128AQ1MFX2.0/NOPB uniquely combines AEC-Q100 Grade 1 qualification, integrated enable functionality, and SOT-23-5 packaging - making it optimal for space-constrained, automotive-qualified, and battery-gated designs where moderate tempco suffices.
Availability
LM4128AQ1MFX2.0/NOPB is available at Aetrix Electronics and suitable for automotive electronics, portable instrumentation, and industrial process control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4128AQ1MFX2.0/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, embedded processing, and power management technologies, with decades of expertise in precision reference design and automotive qualification.
The LM4128 product line delivers micropower, high-accuracy series voltage references for space-constrained, battery-operated, and automotive-grade systems demanding low dropout, wide temperature operation, and simplified layout.
FAQ
What is the maximum input voltage for LM4128AQ1MFX2.0/NOPB?
The LM4128AQ1MFX2.0/NOPB supports a maximum input voltage of 5.5 V, as specified in its Absolute Maximum Ratings. Operation above this level risks permanent damage. For reliable regulation, VIN must be ≥2.448 V (VREF + 400 mV) across all load and temperature conditions. The device is not designed for input voltages exceeding 5.5 V, even momentarily.
Does LM4128AQ1MFX2.0/NOPB require an external output capacitor?
No, LM4128AQ1MFX2.0/NOPB is internally compensated and stable without an output capacitor. However, adding a 1–10 µF ceramic capacitor (COUT) between VREF and GND improves load transient response and reduces output noise - especially beneficial in ADC reference and fast-switching applications. COUT is optional but recommended for dynamic loads.
What does the 'Q' suffix in LM4128AQ1MFX2.0/NOPB signify?
The 'Q' in LM4128AQ1MFX2.0/NOPB indicates AEC-Q100 Grade 1 qualification, meaning the device is manufactured on an automotive-grade flow and tested to operate reliably across −40°C to +125°C junction temperature. This includes stress testing for humidity, temperature cycling, and ESD per automotive standards - essential for under-hood and safety-critical applications.
How does the enable pin (EN) function on LM4128AQ1MFX2.0/NOPB?
The EN pin on LM4128AQ1MFX2.0/NOPB is an active-high digital control input. When pulled ≥65% of VIN, the device operates normally; when held ≤35% of VIN, it enters shutdown mode drawing only 3–7 µA. The pin has an internal ~2 µA pull-up, so tying EN to VIN enables continuous operation. Floating EN is acceptable but not recommended for deterministic behavior.
Is LM4128AQ1MFX2.0/NOPB compatible with ceramic input capacitors?
Yes, LM4128AQ1MFX2.0/NOPB is explicitly designed for use with low-ESR ceramic capacitors (X5R/X7R). A minimum 0.1 µF CIN is required between VIN and GND; larger values (4.7–22 µF) further reduce input noise and startup overshoot. TI confirms stability with ceramic dielectrics - no tantalum or electrolytic capacitors are needed or recommended.
LM4128AQ1MFX2.0/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
LM4128AQ1MFX2.0/NOPB FAQ
1.How can I place an order for LM4128AQ1MFX2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128AQ1MFX2.0/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 LM4128AQ1MFX2.0/NOPB reliable?
The price and inventory of LM4128AQ1MFX2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128AQ1MFX2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128AQ1MFX2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128AQ1MFX2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128AQ1MFX2.0/NOPB?
LM4128AQ1MFX2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128AQ1MFX2.0/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 LM4128AQ1MFX2.0/NOPB?
For technical support, including LM4128AQ1MFX2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128AQ1MFX2.0/NOPB requirements.
6.How does Aetrix verify that LM4128AQ1MFX2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128AQ1MFX2.0/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 LM4128AQ1MFX2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128AQ1MFX2.0/NOPB?
All LM4128AQ1MFX2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128AQ1MFX2.0/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 LM4128AQ1MFX2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128AQ1MFX2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128AQ1MFX2.0/NOPB Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
