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Texas Instruments LM4128BQ1MF4.1/NOPB
- Part No.:
- LM4128BQ1MF4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128BQ1MF4.1/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
LM4128BQ1MF4.1/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 package, delivering 4.096 V output with ±0.2% initial accuracy (B-grade), 75 ppm/°C max temperature coefficient, and 60 µA supply current. It features an enable pin for 3 µA shutdown mode and supports up to 20 mA load current - ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4128BQ1MF4.1/NOPB datasheet, LM4128BQ1MF4.1/NOPB pinout, LM4128BQ1MF4.1/NOPB application, or LM4128BQ1MF4.1/NOPB equivalent, key selection criteria include dropout voltage (175–400 mV at 10 mA), 0.1–10 Hz noise (350 µVPP), long-term stability (50 ppm/1000 hrs), thermal hysteresis (75 ppm), and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4128BQ1MF4.1/NOPB uses an internal band-gap-derived reference core with active error correction, enabling stable 4.096 V output without external compensation. Its enable input controls a low-leakage internal switch that reduces quiescent current to 3–7 µA in shutdown while maintaining fast 33–79 µs turn-on time depending on capacitive load.
Designed for operation from VIN = VREF + 400 mV to 5.5 V, it delivers 20 mA output current with <120 ppm/mA load regulation and <100 ppm/V line regulation. The device is stable with ceramic output capacitors up to 10 µF and requires only a ≥0.1 µF input capacitor (CIN ≥ COUT).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; enables precise 12-bit ADC full-scale calibration without gain scaling. |
| Initial Accuracy | ±0.2% (B-grade); ensures ≤8.2 mV absolute error at 25°C for tight tolerance systems. |
| Tempco | 75 ppm/°C max; limits drift to ≤0.38 mV over −40°C to +125°C operating range. |
| Supply Current | 60 µA typical; supports >1-year battery life in 10 µA-sleep IoT sensor nodes. |
| Dropout Voltage | 175–400 mV at 10 mA; allows operation from 4.5 V supply in 5 V rail-constrained designs. |
| Output Noise | 350 µVPP (0.1–10 Hz); preserves ENOB in 16-bit SAR ADC front-ends. |
| Shutdown Current | 3–7 µA; enables power-gating during idle cycles without external FET control. |
Pinout & Package
LM4128BQ1MF4.1/NOPB is housed in a RoHS-compliant 5-pin SOT-23 (DBV) package with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and 1.1 mm height - optimized for space-constrained PCB layouts in automotive and portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N/C) | No-connect | Must be left floating; no internal connection - avoids unintended parasitic coupling. |
| 2 (GND) | Analog ground reference | Low-impedance return path for reference core; requires dedicated ground plane tie. |
| 3 (EN) | Enable control input | Active-high logic; VIH ≥65% VIN, VIL ≤35% VIN - compatible with 1.8–5 V MCU GPIO. |
| 4 (VIN) | Input supply | Accepts 4.496–5.5 V; must exceed VREF by ≥400 mV for specified dropout performance. |
| 5 (VREF) | Precision output | 4.096 V source with 20 mA sink/source capability; requires local 0.1 µF CIN and optional COUT. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C junction operation in automotive ECUs and ADAS sensors. |
| No external capacitor required | Stable with 0 pF COUT; eliminates BOM cost and layout area for basic applications. |
| Indefinite short-circuit protection | Self-limits output to 75 mA during fault - prevents thermal runaway without external fuse. |
| Low ESR ceramic capacitor compatibility | Works with X5R/X7R dielectrics; avoids instability risks associated with tantalum or electrolytic caps. |
| Thermal hysteresis ≤75 ppm | Ensures repeatable 4.096 V output after thermal cycling - critical for calibration-critical test gear. |
Applications
| Portable Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered handheld multimeter acquiring 16-bit ADC samples at 1 kSPS. IC Role / Device Role / Timing Role: Precision 4.096 V reference for SAR ADC VREF input and DAC bias generation. Use Value: ±0.2% initial accuracy and 75 ppm/°C tempco maintain <0.01% full-scale error across temperature, eliminating field recalibration. |
Use Scenario: Tire pressure monitoring system (TPMS) ECU measuring piezoresistive bridge output. IC Role / Device Role / Timing Role: Stable excitation reference for ratiometric bridge measurement and ADC reference. Use Value: AEC-Q100 Grade 1 rating and −40°C to +125°C operation ensure reliability in under-hood environments. |
| Industrial PLC Analog Input Module | Medical Patient Monitor Front-End |
|
Use Scenario: 4–20 mA loop-powered I/O module digitizing thermocouple and RTD signals. IC Role / Device Role / Timing Role: Low-drift reference for programmable gain instrumentation amplifier and 24-bit sigma-delta ADC. Use Value: 50 ppm long-term stability over 1000 hrs minimizes maintenance intervals in unattended factory deployments. |
Use Scenario: Portable ECG monitor digitizing microvolt-level biopotential signals with 12-bit resolution. IC Role / Device Role / Timing Role: Ultra-low-noise (350 µVPP) reference for analog front-end gain stages and ADC reference. Use Value: 0.1–10 Hz noise spec directly limits baseline wander and improves diagnostic 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 |
|---|---|---|---|
| REF3040AIDBZR | 4.096 V, ±0.2% initial accuracy, 50 ppm/°C, 50 µA IQ, SOT-23-5 - lower tempco but no enable pin. | Lacks shutdown mode; unsuitable for ultra-low-power duty-cycled systems requiring <10 µA sleep current. | Select when lowest possible drift dominates over power gating needs. |
| MAX6029AEUR+T | 4.096 V, ±0.2% initial accuracy, 75 ppm/°C, 65 µA IQ, SOT-23-5 - includes enable but higher noise (450 µVPP). | Higher 0.1–10 Hz noise degrades ENOB in high-resolution data acquisition paths. | Select when enable functionality is required and noise budget allows +100 µVPP margin. |
Compared with REF3040AIDBZR and MAX6029AEUR+T, LM4128BQ1MF4.1/NOPB uniquely balances AEC-Q100 Grade 1 qualification, enable-controlled 3 µA shutdown, and 350 µVPP noise - making it optimal for automotive and portable medical devices where safety, power efficiency, and signal integrity are jointly constrained.
Availability
LM4128BQ1MF4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, industrial PLC analog inputs, and medical patient monitors requiring stable component supply with automotive-grade reliability and traceable sourcing.
Supply support for LM4128BQ1MF4.1/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 and embedded processing technologies, with decades of expertise in precision reference design and automotive-grade qualification.
LM4128BQ1MF4.1/NOPB belongs to TI's precision micropower series voltage reference product line, engineered for high-accuracy, low-power, and AEC-Q100-compliant applications in automotive, industrial, and portable medical systems.
FAQ
What is the guaranteed initial accuracy of LM4128BQ1MF4.1/NOPB over temperature?
The LM4128BQ1MF4.1/NOPB is a B-grade device with guaranteed ±0.2% initial accuracy at 25°C. Over the full −40°C to +125°C junction temperature range, its total error - including tempco (75 ppm/°C), load regulation (≤120 ppm/mA), and line regulation (≤100 ppm/V) - remains within ±0.35% of 4.096 V, as confirmed in the SNVS475E datasheet Electrical Characteristics tables.
Does LM4128BQ1MF4.1/NOPB require an external output capacitor to remain stable?
No, LM4128BQ1MF4.1/NOPB is internally compensated and stable with 0 pF output capacitance. An optional COUT (up to 10 µF) may be added to improve load transient response, but it is not required for stability - unlike many older references that mandate minimum COUT. The mandatory CIN (≥0.1 µF) must always be present per the datasheet Application Information section.
What is the maximum load current supported by LM4128BQ1MF4.1/NOPB while maintaining specified accuracy?
LM4128BQ1MF4.1/NOPB supports up to 20 mA output current while maintaining its specified electrical characteristics, including ±0.2% initial accuracy and 75 ppm/°C tempco. At 20 mA, dropout voltage remains ≤400 mV, and load regulation contributes ≤120 ppm/mA - adding ≤2.4 ppm (0.01 mV) error to the 4.096 V output, well within the overall grade tolerance budget.
How does the enable pin (EN) function on LM4128BQ1MF4.1/NOPB?
The EN pin on LM4128BQ1MF4.1/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, or interfacing with 1.8–5 V microcontroller GPIOs without level-shifting.
Is LM4128BQ1MF4.1/NOPB qualified for automotive applications?
Yes, LM4128BQ1MF4.1/NOPB is LM4128Q-series and explicitly AEC-Q100 Grade 1 qualified (−40°C to +125°C TJ), manufactured on an automotive-grade flow. This is documented in the "FEATURES" section and "PACKAGE OPTION ADDENDUM" of the SNVS475E datasheet, confirming suitability for engine control units, ADAS sensors, and body electronics where automotive reliability standards apply.
LM4128BQ1MF4.1/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:
- ±0.2%
- 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
LM4128BQ1MF4.1/NOPB FAQ
1.How can I place an order for LM4128BQ1MF4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128BQ1MF4.1/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 LM4128BQ1MF4.1/NOPB reliable?
The price and inventory of LM4128BQ1MF4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128BQ1MF4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128BQ1MF4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128BQ1MF4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128BQ1MF4.1/NOPB?
LM4128BQ1MF4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128BQ1MF4.1/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 LM4128BQ1MF4.1/NOPB?
For technical support, including LM4128BQ1MF4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128BQ1MF4.1/NOPB requirements.
6.How does Aetrix verify that LM4128BQ1MF4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128BQ1MF4.1/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 LM4128BQ1MF4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128BQ1MF4.1/NOPB?
All LM4128BQ1MF4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128BQ1MF4.1/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 LM4128BQ1MF4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4128BQ1MF4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128BQ1MF4.1/NOPB Tags
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