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Texas Instruments LM4128AQ1MFX4.1/NOPB
- Part No.:
- LM4128AQ1MFX4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128AQ1MFX4.1/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,102
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Product details
Overview
LM4128AQ1MFX4.1/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified, precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 4.096 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 LM4128AQ1MFX4.1/NOPB datasheet, LM4128AQ1MFX4.1/NOPB pinout, LM4128AQ1MFX4.1/NOPB application, or LM4128AQ1MFX4.1/NOPB equivalent, key selection criteria include its automotive-grade qualification, enable-controlled shutdown (3–7 µA), 400 mV dropout at 10 mA, stability with up to 10 µF capacitive loads, and 0.1 Hz–10 Hz noise of 350 µVPP.
Technical Context
The LM4128AQ1MFX4.1/NOPB implements a band-gap-derived series reference architecture with internal enable logic and no external stabilization capacitor required. Its design ensures stability across load currents from 0 to 20 mA and input voltages from (VREF + 400 mV) to 5.5 V.
It features indefinite short-circuit protection (75 mA limit), thermal hysteresis of 75 ppm over −40°C to +125°C, and long-term stability of 50 ppm after 1000 hours - all verified under AEC-Q100 Grade 1 stress conditions for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V ±0.1% (A-grade initial tolerance; supports 12-bit DAC/ADC full-scale calibration) |
| Tempco | 75 ppm/°C max (ensures ≤±0.5 mV drift over −40°C to +125°C junction range) |
| Supply Current | 60 µA typical (enables >1-year battery life in 10 µA-sleep systems with periodic wake-up) |
| Shutdown Current | 3–7 µA (EN pin active-low; reduces system standby power by >90% vs active mode) |
| Dropout Voltage | 175–400 mV at 10 mA (allows operation from single-cell Li-ion or 3.3 V rail with margin) |
| Noise (0.1–10 Hz) | 350 µVPP (supports <16-bit ENOB in precision SAR ADC front-ends) |
| Load Regulation | 25–120 ppm/mA (maintains <±1 LSB error for 16-bit 4.096 V reference over 20 mA load swing) |
Pinout & Package
LM4128AQ1MFX4.1/NOPB uses the 5-pin SOT-23 (DBV) package (Package Number DBV, R-PDSO-G5), measuring 2.9 mm × 1.6 mm × 1.15 mm, with gull-wing leads and RoHS-compliant matte tin (SN) finish. Thermal resistance θJ-A = 220°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain floating; not internally bonded - PCB trace must be omitted or isolated |
| 2 - GND | Analog ground reference | Primary return path for reference current; requires low-impedance connection to clean AGND plane |
| 3 - EN | Enable control input | Active-high logic; VIH ≥65% VIN, VIL ≤35% VIN; drives internal pass element on/off |
| 4 - VIN | Input supply | Accepts 4.496 V to 5.5 V; must exceed VREF + 400 mV for regulation; bypass with ≥0.1 µF ceramic |
| 5 - VREF | Precision output | 4.096 V source; stable with 0–10 µF capacitive loads; COUT optional but improves transient response |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation in automotive ECUs, meeting stress test requirements for reliability |
| No external stabilization capacitor | Eliminates need for CSTAB; simplifies layout and reduces BOM count while maintaining stability with 10 µF loads |
| Low dropout (175 mV typ) | Enables direct regulation from 4.3 V sources (e.g., buck converter output), minimizing power loss and heat |
| Indefinite short-circuit protection | Self-limits output to 75 mA during fault; recovers automatically when short is removed - no latch-up or damage |
| Stable with low-ESR ceramics | Compatible with X5R/X7R MLCCs; avoids instability risks associated with tantalum or electrolytic capacitors |
Applications
| Automotive Sensor Signal Conditioning | Portable Data Logger Front-End |
|---|---|
|
Use Scenario: High-accuracy temperature and pressure sensor excitation and ADC biasing in engine control modules. IC Role / Device Role / Timing Role: Precision 4.096 V reference for 12-/16-bit SAR ADCs and ratiometric sensor bridges. Use Value: AEC-Q100 qualification ensures operation across automotive temperature extremes; ±0.1% initial accuracy eliminates field calibration. |
Use Scenario: Battery-powered environmental monitoring node acquiring voltage, current, and thermistor data. IC Role / Device Role / Timing Role: Low-quiescent-current reference enabling multi-year operation on coin cell or Li-SOCl₂ battery. Use Value: 60 µA supply current and 3–7 µA shutdown mode extend battery life; 350 µVPP noise preserves measurement resolution. |
| Industrial PLC Analog Input Module | Medical Patient Monitor Power Rails |
|
Use Scenario: Isolated 4–20 mA loop receiver and voltage-input channel in programmable logic controller backplane. IC Role / Device Role / Timing Role: Stable reference for precision instrumentation amplifiers and sigma-delta ADCs in noisy industrial environments. Use Value: 75 ppm/°C tempco and 75 ppm thermal hysteresis ensure consistent gain accuracy across ambient shifts and thermal cycling. |
Use Scenario: ECG/SpO₂ front-end powering precision op-amps and ADCs in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for biopotential signal chain requiring <10 µV offset stability. Use Value: 0.1 Hz–10 Hz noise of 350 µVPP and 50 ppm long-term stability meet IEC 60601-1 accuracy requirements for Class II devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AUT41#TG16 | 4.096 V, ±0.06% initial accuracy, 3 ppm/°C tempco, 0.9 µA quiescent current, SC70-5 package | Ultra-low drift and power ideal for ultra-long-life IoT sensors; lacks automotive qualification | Select for battery life >10 years and sub-ppm stability; avoid where AEC-Q100 compliance is mandatory |
| ADR3440ARJZ-R7 | 4.096 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA supply current, SOT-23-5 package | Higher tempco and supply current; qualified to AEC-Q100 Grade 3 (−40°C to +105°C), not Grade 1 | Select if Grade 3 automotive rating suffices and lower cost is prioritized; verify thermal derating for 125°C junction |
Compared with MAX6126AUT41#TG16 and ADR3440ARJZ-R7, LM4128AQ1MFX4.1/NOPB uniquely balances AEC-Q100 Grade 1 qualification, 60 µA supply current, and 75 ppm/°C tempco - making it optimal for cost-sensitive, high-reliability automotive and industrial applications where Grade 1 operation and moderate power/noise are jointly required.
Availability
LM4128AQ1MFX4.1/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable data loggers, industrial PLC analog inputs, and medical patient monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4128AQ1MFX4.1/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 ICs, with decades of automotive-grade product development and manufacturing expertise.
LM4128AQ1MFX4.1/NOPB belongs to TI's precision voltage reference product line, designed specifically for high-accuracy, low-power, and high-reliability applications in automotive, industrial, and medical systems where stable reference performance under thermal and supply variation is critical.
FAQ
What is the operating temperature range for LM4128AQ1MFX4.1/NOPB?
The LM4128AQ1MFX4.1/NOPB is AEC-Q100 Grade 1 qualified and specified for continuous operation across a junction temperature range of −40°C to +125°C. This rating is validated per automotive stress test standards and applies to the full set of electrical specifications including initial accuracy, tempco, and load regulation - ensuring reliable performance in under-hood and industrial control environments.
Does LM4128AQ1MFX4.1/NOPB require an input capacitor?
Yes, LM4128AQ1MFX4.1/NOPB requires an input capacitor (CIN). The datasheet specifies a minimum of 0.1 µF ceramic (X5R/X7R) when no output capacitor is used, and CIN ≥ COUT when COUT is present. This capacitor stabilizes the input supply and suppresses noise that could modulate the 4.096 V reference output - omission risks instability or increased output noise in LM4128AQ1MFX4.1/NOPB applications.
What is the maximum load current supported by LM4128AQ1MFX4.1/NOPB?
The LM4128AQ1MFX4.1/NOPB supports up to 20 mA of continuous output current while maintaining regulation within its specified accuracy limits. At 10 mA load, dropout voltage is guaranteed ≤400 mV; at light loads (<1 mA), it drops to 175 mV typical. Exceeding 20 mA may cause output voltage deviation beyond datasheet specs or trigger current limiting - always verify load current against thermal dissipation in the SOT-23 package.
How does the enable (EN) pin function on LM4128AQ1MFX4.1/NOPB?
The EN pin on LM4128AQ1MFX4.1/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 internal pull-up (~2 µA) allows direct connection to VIN for always-on operation. Floating EN is not recommended - tie to VIN or a controlled logic signal to ensure predictable LM4128AQ1MFX4.1/NOPB state.
Is LM4128AQ1MFX4.1/NOPB stable without an output capacitor?
Yes, LM4128AQ1MFX4.1/NOPB is explicitly designed to be stable with no output capacitor (COUT = 0). It remains stable with capacitive loads up to 10 µF, and adding COUT (typically 0.1–10 µF ceramic) improves load transient response - especially during rapid current steps - but is optional. Stability is maintained across all valid load conditions without external compensation, a key differentiator of the LM4128AQ1MFX4.1/NOPB architecture.
LM4128AQ1MFX4.1/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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- 350µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.496V ~ 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
LM4128AQ1MFX4.1/NOPB FAQ
1.How can I place an order for LM4128AQ1MFX4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128AQ1MFX4.1/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 LM4128AQ1MFX4.1/NOPB reliable?
The price and inventory of LM4128AQ1MFX4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128AQ1MFX4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128AQ1MFX4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128AQ1MFX4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128AQ1MFX4.1/NOPB?
LM4128AQ1MFX4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128AQ1MFX4.1/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 LM4128AQ1MFX4.1/NOPB?
For technical support, including LM4128AQ1MFX4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128AQ1MFX4.1/NOPB requirements.
6.How does Aetrix verify that LM4128AQ1MFX4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128AQ1MFX4.1/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 LM4128AQ1MFX4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128AQ1MFX4.1/NOPB?
All LM4128AQ1MFX4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128AQ1MFX4.1/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 LM4128AQ1MFX4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4128AQ1MFX4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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