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Texas Instruments LM4128BMF-2.0/NOPB
- Part No.:
- LM4128BMF-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128BMF-2.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,483
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Product details
Overview
LM4128BMF-2.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 package, delivering 2.048 V output with ±0.2% initial accuracy, 75 ppm/°C temperature coefficient, and 60 µA supply current. It operates from VIN ≥ 2.448 V (VREF + 400 mV) up to 5.5 V, supports 20 mA output current, and features an enable pin for 3–7 µA shutdown mode-ideal for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4128BMF-2.0/NOPB datasheet, LM4128BMF-2.0/NOPB pinout, LM4128BMF-2.0/NOPB application, or LM4128BMF-2.0/NOPB equivalent, key selection criteria include initial accuracy grade (B = ±0.2%), dropout voltage at 10 mA (175–400 mV), load regulation (25–120 ppm/mA), 0.1–10 Hz noise (190 µVPP), and compatibility with ceramic capacitive loads up to 10 µF without external compensation.
Technical Context
The LM4128BMF-2.0/NOPB uses an internal band-gap-derived reference core with active error correction to achieve low drift and high stability. Its enable architecture incorporates a 2 µA internal pull-up, allowing direct connection to VIN or external logic control, with VIH ≥ 65% VIN and VIL ≤ 35% VIN thresholds.
It eliminates need for external stabilization capacitors while maintaining stability with capacitive loads up to 10 µF, and achieves thermal hysteresis of 75 ppm over −40°C to +125°C. The device is specified for operation across the full automotive-grade junction temperature range and exhibits indefinite short-circuit protection limiting output current to 75 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit ADC full-scale alignment (e.g., 2.048 V = 1 LSB × 212) |
| Initial Accuracy | ±0.2% (Grade B); ensures ≤ ±4.1 mV absolute error at 25°C before calibration |
| Tempco | 75 ppm/°C max; contributes ≤ ±12.6 mV drift over −40°C to +125°C span |
| Supply Current | 60 µA typical; supports >1-year battery life in 10 µA-average-power systems |
| Dropout Voltage | 175–400 mV at 10 mA; allows operation from 2.448 V input, compatible with single Li-ion or 3×AA cells |
| Shutdown Current | 3–7 µA with EN = 0 V; reduces quiescent power by >90% during sleep modes |
| Load Regulation | 25–120 ppm/mA; maintains ≤ ±2.45 mV shift from 0 to 20 mA load change |
Pinout & Package
LM4128BMF-2.0/NOPB is housed in a RoHS-compliant 5-pin SOT-23 (DBV) package with 1.27 mm pitch, rated for −40°C to +125°C junction temperature and MSL Level-1 reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected and floating; no internal bond or circuit connection |
| 2 - GND | Analog ground reference | Primary return path for reference core and bias circuitry; requires low-impedance PCB plane |
| 3 - EN | Enable control input | Active-high logic input; drives internal pass element; VIH ≥ 65% VIN, VIL ≤ 35% VIN |
| 4 - VIN | Input supply rail | Accepts 2.448 V to 5.5 V; must be bypassed with ≥0.1 µF ceramic capacitor (CIN) |
| 5 - VREF | Precision output terminal | Delivers regulated 2.048 V; stable with COUT up to 10 µF; supports up to 20 mA sink/source |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B initial accuracy | ±0.2% tolerance enables mid-tier precision applications without calibration overhead |
| Capacitive-load stability | Operates stably with 0–10 µF output capacitance-eliminates need for external compensation network |
| Low-noise output | 190 µVPP (0.1–10 Hz) supports high-resolution SAR and delta-sigma ADCs without added filtering |
| Indefinite short-circuit protection | Self-limiting 75 mA output clamp prevents damage during test, fault, or layout error conditions |
| Wide temperature operation | Specified performance from −40°C to +125°C meets industrial and automotive under-hood requirements |
Applications
| Portable Data Acquisition | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Handheld multimeter measuring DC voltage with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for ADC full-scale calibration and ratiometric sensor excitation. Use Value: Enables ±0.2% absolute measurement accuracy across temperature without auto-zero or software correction. |
Use Scenario: Portable gas detector using electrochemical sensor with analog front-end. IC Role / Device Role / Timing Role: Supplies precision bias voltage for transimpedance amplifier and ADC reference. Use Value: Maintains <±10 ppm/°C effective system drift via 75 ppm/°C tempco and low thermal hysteresis. |
| Automotive Sensor Interface | Industrial Process Monitoring |
Use Scenario: Engine control unit reading temperature and pressure sensors in under-hood environment. IC Role / Device Role / Timing Role: Reference source for 12-bit ADC sampling multiple analog sensor channels. Use Value: Guaranteed operation at 125°C junction temperature with <±0.5% total error over lifetime. |
Use Scenario: PLC analog input module digitizing 4–20 mA loop signals with isolation. IC Role / Device Role / Timing Role: Local reference for isolated sigma-delta ADC on field-side board. Use Value: Delivers 60 µA quiescent current and 20 mA drive capability within tight 5 mm × 3 mm SOT-23 footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | 2.048 V, ±0.2% initial accuracy, 50 ppm/°C tempco, 50 µA IQ, SOT-23-3 (no EN pin) | Lacks enable function; requires external logic for shutdown; lower noise (110 µVPP) | Choose when lowest possible noise and smallest footprint (3-pin) are prioritized over enable control. |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA IQ, SOT-23-5 (EN pin) | Higher precision and stability, but doubles supply current; same pinout except pin 1 = NC → VIN | Choose when long-term stability (<15 ppm/1000 hrs) and ultra-low tempco outweigh micropower needs. |
Compared with LM4128BMF-2.0/NOPB, REF3020AIDBZR offers lower noise and smaller size but no enable control, while ADR3420ARJZ-R7 delivers superior accuracy and drift performance at higher quiescent current-making LM4128BMF-2.0/NOPB optimal for cost-sensitive, enable-driven micropower designs requiring Grade-B precision.
Availability
LM4128BMF-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and automotive sensor interfaces requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4128BMF-2.0/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 IC design and manufacturing.
The LM4128 product line delivers micropower, high-accuracy series voltage references for space-constrained, battery-operated, and wide-temperature industrial systems-designed to replace bulkier shunt references while minimizing system power and board area.
FAQ
What is the maximum input voltage for LM4128BMF-2.0/NOPB?
The LM4128BMF-2.0/NOPB supports a maximum input voltage of 5.5 V across its operating temperature range. Exceeding this limit risks permanent damage, as absolute maximum rating is 6 V. Input voltage must also remain ≥2.448 V (VREF + 400 mV) to maintain regulation at 10 mA load, per datasheet Section 6.3.
Does LM4128BMF-2.0/NOPB require an input capacitor?
Yes, LM4128BMF-2.0/NOPB requires a minimum 0.1 µF ceramic input capacitor (CIN) connected between VIN and GND. This capacitor is mandatory for stability and noise suppression; omitting it may cause oscillation or degraded transient response. CIN must be ≥ COUT if an output capacitor is used.
What is the output noise specification for LM4128BMF-2.0/NOPB?
LM4128BMF-2.0/NOPB delivers 190 µVPP (peak-to-peak) output noise over the 0.1 Hz to 10 Hz bandwidth, as specified in the Electrical Characteristics table for LM4128-2.0 devices. This low noise supports high-resolution ADCs without additional filtering stages.
Can LM4128BMF-2.0/NOPB drive a 10 µF capacitive load?
Yes, LM4128BMF-2.0/NOPB is explicitly characterized and guaranteed stable with capacitive loads up to 10 µF, per datasheet Section 1.2 and Figure 13. No external series resistor or compensation network is required-this is a key differentiator from many competing references.
What does the 'B' grade signify in LM4128BMF-2.0/NOPB?
The 'B' in LM4128BMF-2.0/NOPB denotes Grade B initial accuracy: ±0.2% at 25°C. This is confirmed in the Electrical Characteristics tables for LM4128-2.0, where LM4128B-2.0 shows −0.2% to +0.2% limits. Grade B balances cost and performance for applications needing better than Grade C (±0.5%) but not Grade A (±0.1%).
LM4128BMF-2.0/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:
- ±0.2%
- Temperature Coefficient:
- 75ppm/°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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128BMF-2.0/NOPB FAQ
1.How can I place an order for LM4128BMF-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128BMF-2.0/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 LM4128BMF-2.0/NOPB reliable?
The price and inventory of LM4128BMF-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128BMF-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128BMF-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128BMF-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128BMF-2.0/NOPB?
LM4128BMF-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128BMF-2.0/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 LM4128BMF-2.0/NOPB?
For technical support, including LM4128BMF-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128BMF-2.0/NOPB requirements.
6.How does Aetrix verify that LM4128BMF-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128BMF-2.0/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 LM4128BMF-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128BMF-2.0/NOPB?
All LM4128BMF-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128BMF-2.0/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 LM4128BMF-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128BMF-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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