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Texas Instruments LM4128AMF-4.1/NOPB
- Part No.:
- LM4128AMF-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128AMF-4.1/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,467
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Product details
Overview
LM4128AMF-4.1/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 4.096 V output with ±0.1% initial accuracy (A-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 output current - ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4128AMF-4.1/NOPB datasheet, LM4128AMF-4.1/NOPB pinout, LM4128AMF-4.1/NOPB application, or LM4128AMF-4.1/NOPB equivalent, key selection criteria include initial accuracy at 4.096 V, dropout voltage ≤400 mV at 10 mA, stability with 10 µF capacitive loads, and operation across −40°C to +125°C junction temperature.
Technical Context
The LM4128AMF-4.1/NOPB uses an internal band-gap-derived reference core with active error correction to achieve low drift and high initial accuracy. Its enable-controlled architecture allows seamless integration into power-gated systems without external logic.
It operates as a series reference with VIN ≥ VREF + 400 mV (i.e., ≥4.496 V at 10 mA load), delivers stable output with COUT up to 10 µF, and maintains 0.1% accuracy over full −40°C to +125°C range - verified per A-grade specification limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal; matches common 12-bit DAC/ADC full-scale reference points for zero-code alignment. |
| Initial Accuracy | ±0.1% (A-grade); ensures ≤±4.1 mV absolute error at 25°C - sufficient for 12-bit system accuracy without calibration. |
| Tempco | 75 ppm/°C max; contributes ≤±0.375 mV drift over −40°C to +125°C - critical for uncalibrated industrial sensor front-ends. |
| Supply Current | 60 µA typical; enables multi-year battery life in always-on monitoring nodes with <1 µA average system quiescent draw. |
| Shutdown Current | 3–7 µA with EN = 0 V; reduces standby power by >90% vs active mode - essential for duty-cycled data loggers. |
| Dropout Voltage | 175–400 mV at 10 mA; allows operation from single Li-ion cell (3.0–4.2 V) when paired with LDO or buck converter. |
| Noise (0.1–10 Hz) | 350 µVPP; supports 16-bit SAR ADCs with <1 LSB noise contribution at 4.096 V reference scale. |
Pinout & Package
LM4128AMF-4.1/NOPB is housed in a 5-pin SOT-23 (DBV) package - RoHS-compliant, moisture-sensitive level 1, rated for −40°C to +125°C operation. Pin 1 is N/C (no connect), requiring floating connection per TI specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N/C) | No-connect terminal | Must remain unconnected; no internal bond wire - floating avoids parasitic coupling or ESD path. |
| 2 (GND) | Analog ground reference | Primary return path for reference core and output stage; requires low-impedance PCB plane tie to minimize PSRR degradation. |
| 3 (EN) | Active-high enable input | Drives internal regulator; VIH ≥65% VIN ensures reliable turn-on; VIL ≤35% VIN guarantees full shutdown. |
| 4 (VIN) | Input supply rail | Accepts 4.496–5.5 V (≥VREF + 400 mV); must be bypassed with ≥0.1 µF ceramic capacitor per layout guidelines. |
| 5 (VREF) | Precision reference output | Delivers regulated 4.096 V; stable with 0–10 µF capacitive loads; output impedance <1 Ω below 10 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Enable-controlled shutdown | Reduces supply current to ≤7 µA - enables firmware-controlled power cycling in energy-harvesting sensor nodes. |
| Capacitor-free stability | Operates stably with no output capacitor; eliminates BOM cost and board space for basic applications. |
| Low-noise 0.1–10 Hz output | 350 µVPP noise floor - preserves dynamic range in precision weigh-scale and medical ECG signal chains. |
| High load drive capability | 20 mA output current - directly drives ADC reference inputs, op-amp bias networks, and small DACs without buffer. |
| Wide temperature operation | Specified performance from −40°C to +125°C - suitable for under-hood automotive sensors and industrial PLC modules. |
Applications
| Portable Data Acquisition | Automotive Sensor Conditioning |
|---|---|
Use Scenario: Handheld multimeter sampling 16-bit sigma-delta ADC with 4.096 V reference scale. IC Role / Device Role / Timing Role: Primary voltage reference establishing full-scale input range and gain calibration point. Use Value: ±0.1% initial accuracy and 75 ppm/°C tempco ensure measurement repeatability across battery discharge and ambient temperature shifts. |
Use Scenario: Exhaust gas temperature sensor signal conditioning in engine control unit (ECU). IC Role / Device Role / Timing Role: Stable excitation reference for ratiometric bridge sensing and ADC reference for analog front-end. Use Value: −40°C to +125°C operation and 50 ppm long-term stability maintain calibration integrity over 15-year vehicle lifetime. |
| Medical Patient Monitor | Industrial Process Controller |
Use Scenario: Lead-I ECG amplifier using 4.096 V reference to set common-mode voltage and ADC input range. IC Role / Device Role / Timing Role: Low-noise analog reference source for biopotential signal chain integrity. Use Value: 350 µVPP (0.1–10 Hz) noise ensures <1 µV RMS baseline drift - meets IEC 60601-2-27 ECG accuracy requirements. |
Use Scenario: 4–20 mA transmitter with microcontroller-based DAC generating loop current via precision shunt reference. IC Role / Device Role / Timing Role: High-accuracy, low-drift reference for current-setting resistor bias and DAC output scaling. Use Value: 20 mA output drive capability eliminates external buffer; 400 mV dropout enables use with low-headroom LDOs in isolated field-side power domains. |
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, 100 ppm/°C tempco, 50 µA IQ, SOT-23-5 | Lacks enable pin; fixed 4.096 V only; lower accuracy grade but lower quiescent current | Select when enable functionality is unnecessary and 0.2% accuracy suffices for cost-sensitive designs. |
| ADR3440ARJZ-R7 | 4.096 V, ±0.1% initial accuracy, 30 ppm/°C tempco, 120 µA IQ, SOT-23-5 | Lower tempco and higher IQ; no enable pin; tighter long-term stability (20 ppm/1k hrs) | Select when ultra-low drift dominates over power budget, and shutdown control is handled externally. |
Compared with LM4128AMF-4.1/NOPB, REF3040AIDBZR trades enable control and A-grade accuracy for lower IQ, while ADR3440ARJZ-R7 improves tempco and aging at the cost of 2× supply current and no shutdown mode - making LM4128AMF-4.1/NOPB optimal for battery-powered, enable-driven precision systems.
Availability
LM4128AMF-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial process controllers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4128AMF-4.1/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 analog IC design and high-reliability manufacturing.
The LM4128 product line delivers micropower, high-accuracy series voltage references optimized for space-constrained, battery-operated, and wide-temperature industrial systems - emphasizing low dropout, enable control, and robust capacitive-load stability.
FAQ
What is the maximum input voltage for LM4128AMF-4.1/NOPB?
The LM4128AMF-4.1/NOPB supports a maximum input voltage of 5.5 V, as specified in its Absolute Maximum Ratings. Operation above this voltage risks permanent damage. For reliable regulation, VIN must be ≥4.496 V (VREF + 400 mV) at 10 mA load, and the recommended operating range is 4.496 V to 5.5 V.
Does LM4128AMF-4.1/NOPB require an input capacitor?
Yes - LM4128AMF-4.1/NOPB requires a minimum 0.1 µF ceramic input capacitor (CIN) for stable operation, as stated in TI's APPLICATION INFORMATION section. CIN must be ≥ COUT if an output capacitor is used; larger values (4.7–22 µF) further reduce startup overshoot and supply noise coupling.
What is the output voltage tolerance of LM4128AMF-4.1/NOPB over temperature?
LM4128AMF-4.1/NOPB (A-grade) maintains ±0.1% initial accuracy at 25°C and exhibits ≤75 ppm/°C temperature coefficient over −40°C to +125°C. This results in total output variation of ≤±0.13% across the full temperature range - verified by TI's "Box method" testing per Electrical Characteristics table.
Can LM4128AMF-4.1/NOPB drive a 10 µF capacitive load?
Yes - LM4128AMF-4.1/NOPB is explicitly characterized for stability with capacitive loads up to 10 µF, as confirmed in the datasheet's "Stable with Low ESR Ceramic Capacitors" feature and "APPLICATION INFORMATION" section. No external compensation is required.
Is LM4128AMF-4.1/NOPB qualified for automotive applications?
No - LM4128AMF-4.1/NOPB is not AEC-Q100 qualified. The automotive-grade variants are LM4128AQ/BQ/CQ/DQ (e.g., LM4128AQMF-4.1/NOPB), which undergo additional stress testing and are manufactured on an automotive-grade flow. LM4128AMF-4.1/NOPB is intended for industrial and commercial use.
LM4128AMF-4.1/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:
- ±0.1%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128AMF-4.1/NOPB FAQ
1.How can I place an order for LM4128AMF-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128AMF-4.1/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 LM4128AMF-4.1/NOPB reliable?
The price and inventory of LM4128AMF-4.1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128AMF-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128AMF-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128AMF-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128AMF-4.1/NOPB?
LM4128AMF-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128AMF-4.1/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 LM4128AMF-4.1/NOPB?
For technical support, including LM4128AMF-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128AMF-4.1/NOPB requirements.
6.How does Aetrix verify that LM4128AMF-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128AMF-4.1/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 LM4128AMF-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128AMF-4.1/NOPB?
All LM4128AMF-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128AMF-4.1/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 LM4128AMF-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4128AMF-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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