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Texas Instruments LM4128BQ1MF1.8/NOPB
- Part No.:
- LM4128BQ1MF1.8/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128BQ1MF1.8/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,246
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Product details
Overview
LM4128BQ1MF1.8/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 package, delivering 1.8 V output with ±0.2% initial accuracy, 75 ppm/°C 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 battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4128BQ1MF1.8/NOPB datasheet, LM4128BQ1MF1.8/NOPB pinout, LM4128BQ1MF1.8/NOPB application, or LM4128BQ1MF1.8/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 400 mV dropout at 10 mA, stability with up to 10 µF capacitive loads, and automotive-grade thermal performance from −40°C to +125°C.
Technical Context
The LM4128BQ1MF1.8/NOPB uses an internal band-gap-derived reference architecture optimized for low quiescent current and high PSRR. Its enable-controlled startup sequence ensures controlled power-up in safety-critical automotive subsystems, while the no-external-capacitor-required design simplifies layout in space-constrained PCBs.
It operates across VIN = VREF + 400 mV to 5.5 V (≥2.2 V min input), maintains output regulation under 0–20 mA load variation, and exhibits 25–120 ppm/mA load regulation - enabling direct use in ADC biasing, sensor excitation, and precision regulator feedback paths without additional buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V nominal, ±0.2% initial accuracy (B grade) - ensures ≤±3.6 mV absolute error at 25°C for 12-bit ADC reference scaling |
| Tempco | 75 ppm/°C max - limits drift to ≤13.5 mV over −40°C to +125°C operating range |
| Supply Current | 60 µA typical - enables >1-year battery life in 10 µA-sleep IoT nodes with periodic reference activation |
| Shutdown Current | 3–7 µA with EN = 0 V - reduces standby power by 95% vs active mode |
| Dropout Voltage | 200–400 mV at 10 mA - allows operation from single-cell Li-ion (3.0–4.2 V) or 2.5 V logic rails with margin |
| Noise (0.1–10 Hz) | 170 µVPP - supports 16-bit SAR ADCs without added filtering |
| Load Drive | 20 mA max - sufficient to drive multiple op-amp inputs or DAC references simultaneously |
Pinout & Package
LM4128BQ1MF1.8/NOPB is housed in a 5-pin SOT-23 (DBV) package with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and exposed pad not connected internally. Pin 1 is N/C (no connect); pin 2 is GND; pin 3 is EN; pin 4 is VIN; pin 5 is VREF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (N/C) | No-connect terminal | Must be left floating - internal disconnect prevents parasitic coupling or ESD path disruption |
| Pin 2 (GND) | Analog ground reference | Primary return path for reference current and load current; requires low-impedance connection to system AGND plane |
| Pin 3 (EN) | Digital enable control | Active-high logic input; VIH ≥65% VIN, VIL ≤35% VIN - compatible with 1.8 V/3.3 V GPIO without level shifting |
| Pin 4 (VIN) | Input supply rail | Accepts 2.2 V to 5.5 V; must exceed VREF by ≥400 mV for regulation - decoupling capacitor (≥0.1 µF) required |
| Pin 5 (VREF) | Precision output node | 1.8 V reference source; stable with 0–10 µF capacitive loads; sensitive to PCB trace inductance - place bypass cap within 2 mm |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C) - validated for engine control, ADAS sensors, and body electronics |
| Capacitor-free stability | No external COUT required - eliminates BOM cost and layout risk while maintaining phase margin >45° with 10 µF load |
| Low-noise architecture | 170 µVPP (0.1–10 Hz) - enables direct interface to high-resolution delta-sigma ADCs without post-filtering |
| Indefinite short-circuit protection | 75 mA current limit - survives accidental VREF-to-GND shorts without latch-up or parametric shift |
| Thermal hysteresis | 75 ppm max - ensures repeatable 1.8 V output after thermal cycling between −40°C and +125°C |
Applications
| Automotive Sensor Signal Conditioning | Portable Medical Instrumentation |
|---|---|
Use Scenario: Supplying excitation voltage and ADC reference for MEMS pressure sensors in brake-by-wire modules. IC Role / Device Role / Timing Role: Precision 1.8 V reference for ratiometric sensor bridge biasing and 16-bit SAR ADC conversion. Use Value: Enables <±0.1% total measurement error over temperature, meeting ISO 26262 ASIL-B functional safety requirements. |
Use Scenario: Providing stable reference for ECG front-end amplifiers and analog-to-digital conversion in handheld patient monitors. IC Role / Device Role / Timing Role: Low-noise, micropower voltage reference for biopotential signal chain calibration. Use Value: Supports 100 dB SNR at 1 kHz with 170 µVPP noise, extending battery runtime beyond 72 hours per charge. |
| Industrial Data Acquisition Modules | Battery-Powered Test Equipment |
Use Scenario: Serving as master reference for multi-channel 24-bit delta-sigma ADCs in PLC analog input cards. IC Role / Device Role / Timing Role: Primary VREF source for simultaneous sampling of 8 thermocouple and RTD channels. Use Value: 75 ppm/°C tempco and 50 ppm long-term stability ensure <0.02% gain drift over 1 year in uncalibrated field deployments. |
Use Scenario: Powering precision voltage/current sources in handheld multimeters and calibrators. IC Role / Device Role / Timing Role: Stable 1.8 V reference for programmable gain amplifier (PGA) offset trimming and DMM ADC reference. Use Value: ±0.2% initial accuracy and 25 ppm/mA load regulation enable 0.05% basic accuracy without factory recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AUT18+T | 1.8 V, ±0.06% initial accuracy, 3 ppm/°C tempco, 0.9 µA IQ - higher precision but 3× cost and no enable pin | Used in metrology-grade lab equipment where ultra-low drift outweighs cost and feature trade-offs | Select when sub-10 ppm total error budget demands tighter spec; avoid if shutdown control or cost sensitivity applies |
| ADR3418ARJZ-R7 | 1.8 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA IQ - lower tempco but higher supply current and no AEC-Q100 rating | Preferred in industrial automation where extended tempco spec is critical but automotive qualification is unnecessary | Choose for non-automotive designs requiring better tempco than LM4128BQ1MF1.8/NOPB but accepting higher IQ and no EN pin |
Compared with MAX6126AUT18+T and ADR3418ARJZ-R7, LM4128BQ1MF1.8/NOPB uniquely balances AEC-Q100 compliance, enable functionality, micropower operation, and cost-effectiveness - making it optimal for volume automotive and portable industrial applications where moderate precision suffices.
Availability
LM4128BQ1MF1.8/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical devices, industrial data loggers, and battery-powered test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4128BQ1MF1.8/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 leader specializing in analog, embedded processing, and connectivity technologies, with over 50 years of innovation in precision analog ICs.
The LM4128 product line delivers automotive-qualified, micropower voltage references optimized for space-constrained, battery-sensitive systems requiring high accuracy and robust thermal performance - targeting ADAS, powertrain, and industrial sensing markets.
FAQ
What is the maximum input voltage for LM4128BQ1MF1.8/NOPB?
The absolute maximum input voltage for LM4128BQ1MF1.8/NOPB is 6 V, but the recommended operating maximum is 5.5 V. Exceeding 5.5 V risks exceeding absolute maximum ratings and may cause irreversible damage. For reliable operation, VIN must remain within VREF + 400 mV (≥2.2 V) to 5.5 V across the full −40°C to +125°C junction temperature range.
Does LM4128BQ1MF1.8/NOPB require an output capacitor?
No, LM4128BQ1MF1.8/NOPB does not require an output capacitor for stability - it is designed to remain stable with capacitive loads up to 10 µF. An optional COUT improves load transient response but increases turn-on time; CIN ≥0.1 µF is mandatory on VIN. The device's internal compensation eliminates need for external COUT in most applications.
Is LM4128BQ1MF1.8/NOPB qualified for automotive use?
Yes, LM4128BQ1MF1.8/NOPB is AEC-Q100 Grade 1 qualified (−40°C to +125°C), manufactured on an automotive-grade flow, and marked as LM4128BQ - confirming its suitability for engine bay, chassis, and ADAS applications where reliability under thermal stress and vibration is critical.
What is the shutdown current of LM4128BQ1MF1.8/NOPB?
LM4128BQ1MF1.8/NOPB draws 3–7 µA in shutdown mode when the EN pin is driven low (≤35% VIN). This ultra-low IQ enables >5-year battery life in always-on monitoring systems with periodic wake-up cycles, and is verified across the full operating temperature range.
Can LM4128BQ1MF1.8/NOPB drive a 10 µF capacitive load?
Yes, LM4128BQ1MF1.8/NOPB is explicitly characterized for stability with capacitive loads up to 10 µF. TI's datasheet confirms phase margin remains >45° under this condition, and typical turn-on time is 78.8 µs into 10 µF - making it suitable for driving ADC reference inputs, op-amp bias networks, and regulated LDO feedback nodes directly.
LM4128BQ1MF1.8/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:
- ±0.2%
- 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
LM4128BQ1MF1.8/NOPB FAQ
1.How can I place an order for LM4128BQ1MF1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128BQ1MF1.8/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 LM4128BQ1MF1.8/NOPB reliable?
The price and inventory of LM4128BQ1MF1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128BQ1MF1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128BQ1MF1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128BQ1MF1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128BQ1MF1.8/NOPB?
LM4128BQ1MF1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128BQ1MF1.8/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 LM4128BQ1MF1.8/NOPB?
For technical support, including LM4128BQ1MF1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128BQ1MF1.8/NOPB requirements.
6.How does Aetrix verify that LM4128BQ1MF1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128BQ1MF1.8/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 LM4128BQ1MF1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128BQ1MF1.8/NOPB?
All LM4128BQ1MF1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128BQ1MF1.8/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 LM4128BQ1MF1.8/NOPB part is unused and in its original packaging.
Return procedure for LM4128BQ1MF1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128BQ1MF1.8/NOPB Tags
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