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Texas Instruments LM4128BQ1MF3.3/NOPB
- Part No.:
- LM4128BQ1MF3.3/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128BQ1MF3.3/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:210
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Product details
Overview
LM4128BQ1MF3.3/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 3.3 V output with ±0.2% initial accuracy, 75 ppm/°C max temperature coefficient, and 60 µA supply current. It features an enable pin for 3 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 LM4128BQ1MF3.3/NOPB datasheet, LM4128BQ1MF3.3/NOPB pinout, LM4128BQ1MF3.3/NOPB application, or LM4128BQ1MF3.3/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, dropout voltage of 175–400 mV at 10 mA, stability with capacitive loads up to 10 µF, and absence of required external output capacitor.
Technical Context
The LM4128BQ1MF3.3/NOPB uses a band-gap-derived reference core optimized for low quiescent current and high PSRR. Its enable logic accepts input levels referenced to VIN (VIH ≥65% VIN, VIL ≤35% VIN), and internal pull-up allows floating EN connection when active operation is required.
It achieves stable regulation without COUT but benefits from optional 0.1–10 µF ceramic output capacitance for improved transient response. Input stabilization requires ≥0.1 µF ceramic CIN, scalable with COUT per CIN ≥ COUT rule, and supports input voltages from (VREF + 400 mV) to 5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal, ±0.2% initial accuracy (B grade) - ensures ADC/DAC reference error ≤6.6 mV at room temperature |
| Temperature Coefficient | 75 ppm/°C max - limits drift to ±9.9 mV over −40°C to +125°C operating range |
| Supply Current | 60 µA typical - enables >1-year battery life in 10 µA system sleep modes |
| Shutdown Current | 3–7 µA with EN = 0 V - reduces standby power in intermittently active sensors |
| Dropout Voltage | 175–400 mV at 10 mA load - permits operation from single-cell Li-ion (3.0 V min) or 3.3 V rail with margin |
| Output Noise (0.1–10 Hz) | 310 µVPP - suitable for 16-bit SAR ADCs requiring <1 LSB noise at 3.3 V full-scale |
| Load Regulation | 25–120 ppm/mA - maintains <0.4 mV error across 0–20 mA load variation |
Pinout & Package
LM4128BQ1MF3.3/NOPB is housed in a 5-pin SOT-23 (DBV) package with 0.95 mm pitch, JEDEC MO-178AA compliant, and RoHS-compliant matte tin lead finish. Thermal resistance θJ-A = 220°C/W enables operation at full 125°C junction temperature with minimal PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N/C) | No-connect terminal | Must remain unconnected and floating; no internal bond wire or circuit connection |
| 2 (GND) | Analog ground reference | Primary return path for reference core and bias circuits; requires low-impedance PCB connection |
| 3 (EN) | Enable control input | Active-high logic input; internal 2 µA pull-up allows direct tie-to-VIN for always-on use |
| 4 (VIN) | Input supply rail | Accepts 3.7–5.5 V; must exceed VREF by ≥400 mV for specified dropout performance |
| 5 (VREF) | Precision output terminal | Delivers regulated 3.3 V; stable with 0–10 µF capacitive loads; no mandatory COUT required |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B AEC-Q100 qualification | Qualified to Grade 1 (−40°C to +125°C) for automotive ECUs and ADAS sensor modules |
| Capacitor-free stability | Operates stably without output capacitor - eliminates BOM cost and layout area for basic applications |
| Low-noise band-gap core | 310 µVPP (0.1–10 Hz) enables direct interface to 16-bit precision data converters |
| Indefinite short-circuit protection | Limits output current to 75 mA during fault - prevents thermal runaway and enables robust field deployment |
| Wide input voltage range | Supports 3.7–5.5 V inputs - compatible with single-cell Li-ion, USB-powered, and industrial 3.3/5 V rails |
Applications
| Portable Battery-Powered Test Equipment | Automotive Engine Control Sensors |
|---|---|
Use Scenario: Handheld multimeter with 16-bit ADC sampling analog sensor signals in field environments. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and analog front-end gain calibration. Use Value: ±0.2% initial accuracy and 75 ppm/°C tempco ensure measurement repeatability across temperature swings without recalibration. |
Use Scenario: Oxygen sensor signal conditioning module in engine control unit under hood temperature extremes. IC Role / Device Role / Timing Role: Stable 3.3 V reference for op-amp biasing and ADC reference in closed-loop fuel injection control. Use Value: AEC-Q100 Grade 1 rating and −40°C to +125°C operation guarantee reliability during cold starts and thermal soak cycles. |
| Industrial Data Acquisition Systems | Medical Patient Monitoring Devices |
Use Scenario: 8-channel isolated analog input module acquiring thermocouple and RTD signals in factory automation. IC Role / Device Role / Timing Role: Per-channel reference source for sigma-delta ADCs in modular I/O systems. Use Value: 60 µA supply current and enable pin allow channel-level power gating to meet overall system power budgets. |
Use Scenario: Portable ECG monitor requiring low-noise, long-term stable reference for biopotential amplification. IC Role / Device Role / Timing Role: Reference for precision instrumentation amplifier and 24-bit delta-sigma ADC. Use Value: 310 µVPP (0.1–10 Hz) noise and 50 ppm long-term stability over 1000 hrs support clinical-grade signal 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 |
|---|---|---|---|
| MAX6126AUT33+T | 3.3 V, ±0.1% initial accuracy, 3 ppm/°C tempco, 0.9 µA quiescent current, SOT-23-6 | Ultra-low drift and current suit ultra-long-life IoT sensors; higher cost and different pinout | Select when sub-ppm/°C stability and nanoamp shutdown are mandatory; verify PCB layout compatibility |
| ADR3433ARJZ-R7 | 3.3 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA supply current, SOT-23-5 | Lower tempco improves wide-temperature accuracy; higher IQ limits battery life vs LM4128BQ1MF3.3/NOPB | Prefer for industrial PLCs where temperature range dominates power budget; same footprint simplifies migration |
Compared with MAX6126AUT33+T and ADR3433ARJZ-R7, LM4128BQ1MF3.3/NOPB offers optimal balance of AEC-Q100 compliance, 60 µA supply current, and 75 ppm/°C tempco - making it the most cost-effective choice for automotive and industrial applications requiring Grade 1 qualification without ultra-low-drift premium.
Availability
LM4128BQ1MF3.3/NOPB is available at Aetrix Electronics and suitable for portable test equipment, automotive engine control units, industrial data acquisition systems, and medical patient monitoring devices requiring stable component supply across extended temperature ranges and automotive-grade reliability.
Supply support for LM4128BQ1MF3.3/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 connectivity technologies, with decades of expertise in precision analog IC design and automotive-grade qualification.
LM4128BQ1MF3.3/NOPB belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-power, and temperature-stable operation in safety-critical automotive and industrial systems.
FAQ
What is the maximum load current supported by LM4128BQ1MF3.3/NOPB?
The LM4128BQ1MF3.3/NOPB supports up to 20 mA output current while maintaining specified accuracy and regulation. At 10 mA load, dropout voltage remains ≤400 mV, and load regulation is bounded at 25–120 ppm/mA. Exceeding 20 mA triggers current limiting, with short-circuit protection clamping output at 75 mA indefinitely.
Does LM4128BQ1MF3.3/NOPB require an external output capacitor (COUT)?
No, LM4128BQ1MF3.3/NOPB is designed to operate stably without an external output capacitor. A COUT is optional and improves load transient response - especially when switching between light and heavy loads - but introduces longer turn-on time. If used, COUT must be ≤10 µF and low-ESR ceramic (X5R/X7R).
What does the 'Q' suffix in LM4128BQ1MF3.3/NOPB indicate?
The 'Q' denotes AEC-Q100 qualification. LM4128BQ1MF3.3/NOPB is certified to Grade 1 (−40°C to +125°C junction temperature), including stress testing for automotive reliability. The 'B' specifies initial accuracy of ±0.2%, '1' indicates tape-and-reel packaging, 'MF' is the SOT-23 (DBV) package code, and '/NOPB' confirms lead-free/RoHS compliance.
How does the enable pin (EN) function on LM4128BQ1MF3.3/NOPB?
The EN pin is active-high with VIH ≥65% VIN and VIL ≤35% VIN. An internal 2 µA pull-up allows leaving EN unconnected for always-on operation. When pulled low (≤35% VIN), LM4128BQ1MF3.3/NOPB enters shutdown mode drawing only 3–7 µA. Driving EN directly from a microcontroller GPIO is fully compatible.
What is the thermal hysteresis specification for LM4128BQ1MF3.3/NOPB?
LM4128BQ1MF3.3/NOPB exhibits 75 ppm thermal hysteresis over −40°C to +125°C cycling, equivalent to ±0.25 mV change in 3.3 V output at 25°C after temperature excursion. This value is measured per the "box method" and ensures repeatable reference performance in systems experiencing repeated thermal cycles.
LM4128BQ1MF3.3/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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- 310µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.7V ~ 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
LM4128BQ1MF3.3/NOPB FAQ
1.How can I place an order for LM4128BQ1MF3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128BQ1MF3.3/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 LM4128BQ1MF3.3/NOPB reliable?
The price and inventory of LM4128BQ1MF3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128BQ1MF3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128BQ1MF3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128BQ1MF3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128BQ1MF3.3/NOPB?
LM4128BQ1MF3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128BQ1MF3.3/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 LM4128BQ1MF3.3/NOPB?
For technical support, including LM4128BQ1MF3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128BQ1MF3.3/NOPB requirements.
6.How does Aetrix verify that LM4128BQ1MF3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128BQ1MF3.3/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 LM4128BQ1MF3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128BQ1MF3.3/NOPB?
All LM4128BQ1MF3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128BQ1MF3.3/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 LM4128BQ1MF3.3/NOPB part is unused and in its original packaging.
Return procedure for LM4128BQ1MF3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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