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Texas Instruments LM4128DQ1MF2.0/NOPB
- Part No.:
- LM4128DQ1MF2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DQ1MF2.0/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,484
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Product details
Overview
LM4128DQ1MF2.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 2.048 V output with ±1.0% initial accuracy, 100 ppm/°C 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 LM4128DQ1MF2.0/NOPB datasheet, LM4128DQ1MF2.0/NOPB pinout, LM4128DQ1MF2.0/NOPB application, or LM4128DQ1MF2.0/NOPB equivalent, key selection criteria include its grade-D accuracy tolerance, dropout voltage of 400 mV at 10 mA, stability with 10 µF capacitive loads, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4128DQ1MF2.0/NOPB is a band-gap-based series voltage reference with internal enable logic and no external stabilization capacitor required. Its architecture ensures stability with low-ESR ceramic capacitors up to 10 µF on the output and mandates ≥0.1 µF input capacitance.
It operates across VIN = VREF + 400 mV to 5.5 V, delivers 2.048 V nominal output, and maintains regulation under load currents from 0 to 20 mA while exhibiting 25–120 ppm/mA load regulation and ≤100 ppm/V line regulation - critical for high-resolution ADC biasing and precision regulator feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit DAC/ADC full-scale alignment without trimming |
| Initial Accuracy | ±1.0% (Grade D); ensures worst-case error ≤20.5 mV at room temperature |
| Tempco | 100 ppm/°C max; contributes ≤247 µV drift over −40°C to +125°C operating range |
| Supply Current | 60 µA typical; supports >1-year battery life in 10 µA-system sleep modes |
| Shutdown Current | 3–7 µA with EN = 0 V; allows ultra-low-power periodic wake-up architectures |
| Dropout Voltage | 400 mV at 10 mA; permits operation from single-cell Li-ion (3.0 V min) or 3.3 V rails |
| Noise (0.1–10 Hz) | 190 µVPP; suitable for 16-bit SAR ADC reference without additional filtering |
Pinout & Package
LM4128DQ1MF2.0/NOPB uses a 5-pin SOT-23 (DBV) package - RoHS-compliant, moisture sensitivity level 1, rated for −40°C to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N/C) | No-connect | Must remain unconnected; floating - not tied to GND or any other node |
| 2 (GND) | Ground reference | Primary return path for reference output and internal circuitry; requires low-impedance PCB connection |
| 3 (EN) | Enable control input | Active-high logic; VIH ≥65% VIN, VIL ≤35% VIN; internal 2 µA pull-up allows direct tie-to-VIN for always-on operation |
| 4 (VIN) | Input supply | Accepts 2.448 V to 5.5 V; must exceed VREF by ≥400 mV for regulation at full load |
| 5 (VREF) | Precision output | 2.048 V source with ±1.0% accuracy; drives resistive or capacitive loads up to 20 mA / 10 µF |
Key Features
| Feature | Design Value |
|---|---|
| Grade-D AEC-Q100 qualification | Validated for automotive Grade 1 (−40°C to +125°C), supporting engine control and ADAS sensor modules |
| Capacitor-free stability | Stable without COUT; eliminates BOM cost and layout area while maintaining phase margin >45° with 10 µF load |
| Low dropout operation | 400 mV dropout at 10 mA enables use with low-headroom supplies like buck converters or aging batteries |
| Indefinite short-circuit protection | Current-limited to 75 mA during output fault; prevents thermal runaway and enables safe recovery |
| Thermal hysteresis | 75 ppm max; ensures ≤153 µV repeatability error after thermal cycling - critical for calibration-critical test equipment |
Applications
| Portable Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Handheld multimeter or portable data logger powered by two AA cells (2.4–3.2 V). IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for 12-bit SAR ADC converting analog sensor outputs. Use Value: Enables full-scale resolution matching without trimming; ±1.0% accuracy ensures <0.5% measurement uncertainty at room temperature. | Use Scenario: Engine coolant temperature (ECT) sensor interface in powertrain control module. IC Role / Device Role / Timing Role: Supplies excitation and reference voltage for ratiometric RTD bridge measurement. Use Value: AEC-Q100 Grade 1 rating guarantees operation across full automotive temperature range; 100 ppm/°C tempco limits gain error drift in cold-cranking conditions. |
| Industrial Process Controller I/O Module | Medical Patient Monitoring Front-End |
Use Scenario: 4–20 mA loop-powered transmitter with local analog sensing. IC Role / Device Role / Timing Role: Precision reference for DAC generating loop current setpoint and for ADC monitoring supply rail. Use Value: 60 µA quiescent current minimizes burden on loop power; 20 mA output drive supports active filter and buffer stages. | Use Scenario: ECG front-end with 24-bit delta-sigma ADC requiring low-noise reference. IC Role / Device Role / Timing Role: Low-noise 2.048 V reference for ADC reference input and PGA gain-setting network. Use Value: 190 µVPP (0.1–10 Hz) noise avoids degrading effective number of bits (ENOB); SOT-23 footprint saves space in compact wearable design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AASA20+ | 2.048 V, ±0.06% initial accuracy, 3 ppm/°C tempco, 75 µA IQ, SO-8 package | Higher precision and lower drift; requires larger PCB area and higher cost | Select when system-level accuracy demands <0.1% total error over temperature and time |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial accuracy, 30 ppm/°C tempco, 120 µA IQ, SOT-23-5 package | Same footprint but higher supply current and better tempco; not AEC-Q100 qualified | Select for industrial non-automotive designs where 30 ppm/°C drift is acceptable and AEC-Q100 not required |
Compared with MAX6126AASA20+, LM4128DQ1MF2.0/NOPB trades precision and drift performance for automotive qualification and lower cost; compared with ADR3420ARJZ-R7, it offers AEC-Q100 compliance and lower IQ but higher tempco - making it optimal for cost-sensitive, temperature-rugged automotive subsystems.
Availability
LM4128DQ1MF2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor interfaces, and industrial I/O modules requiring stable component supply with long-term lifecycle support.
Supply support for LM4128DQ1MF2.0/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 connectivity technologies, with decades of expertise in precision analog ICs.
The LM4128 product line delivers micropower, high-accuracy series voltage references optimized for space-constrained, battery-operated, and automotive-grade systems demanding robust thermal and long-term stability.
FAQ
What is the guaranteed initial accuracy of LM4128DQ1MF2.0/NOPB over temperature?
The LM4128DQ1MF2.0/NOPB is a Grade-D device with guaranteed ±1.0% initial accuracy at 25°C, and this tolerance applies across the full −40°C to +125°C operating junction temperature range per TI's SNVS475E datasheet. No additional derating is specified; the ±1.0% limit is ensured via production test and statistical correlation.
Does LM4128DQ1MF2.0/NOPB require an external output capacitor to remain stable?
No - LM4128DQ1MF2.0/NOPB is internally compensated and stable with or without an output capacitor. It remains stable driving capacitive loads up to 10 µF, though adding COUT (e.g., 1 µF ceramic) improves load transient response. An input capacitor (≥0.1 µF) is mandatory for stable operation.
What does the "Q" suffix in LM4128DQ1MF2.0/NOPB indicate?
"Q" denotes AEC-Q100 qualification. LM4128DQ1MF2.0/NOPB is manufactured on an automotive-grade flow and certified to AEC-Q100 Grade 1 standards (−40°C to +125°C), including stress testing for reliability in automotive environments - distinct from commercial-grade LM4128xMF2.0/NOPB variants.
Can LM4128DQ1MF2.0/NOPB be used with a 2.5 V input supply?
No - LM4128DQ1MF2.0/NOPB requires VIN ≥ VREF + 400 mV = 2.448 V minimum for regulation. At 2.5 V input, it operates within specification and delivers full 20 mA load capability. Below 2.448 V, output regulation is not guaranteed and VREF drops nonlinearly.
What is the maximum continuous output current for LM4128DQ1MF2.0/NOPB?
LM4128DQ1MF2.0/NOPB is rated for up to 20 mA continuous output current under all operating conditions (−40°C to +125°C, VIN ≤5.5 V). Short-circuit current is limited to 75 mA, enabling safe operation into fault conditions without damage.
LM4128DQ1MF2.0/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:
- ±1%
- Temperature Coefficient:
- 100ppm/°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
LM4128DQ1MF2.0/NOPB FAQ
1.How can I place an order for LM4128DQ1MF2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DQ1MF2.0/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 LM4128DQ1MF2.0/NOPB reliable?
The price and inventory of LM4128DQ1MF2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128DQ1MF2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DQ1MF2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DQ1MF2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DQ1MF2.0/NOPB?
LM4128DQ1MF2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DQ1MF2.0/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 LM4128DQ1MF2.0/NOPB?
For technical support, including LM4128DQ1MF2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DQ1MF2.0/NOPB requirements.
6.How does Aetrix verify that LM4128DQ1MF2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DQ1MF2.0/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 LM4128DQ1MF2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DQ1MF2.0/NOPB?
All LM4128DQ1MF2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DQ1MF2.0/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 LM4128DQ1MF2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128DQ1MF2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128DQ1MF2.0/NOPB Tags
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