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Texas Instruments LM4128AMF-3.0/NOPB
- Part No.:
- LM4128AMF-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128AMF-3.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,750
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Product details
Overview
LM4128AMF-3.0/NOPB from Texas Instruments is a precision micropower series voltage reference in a 5-pin SOT-23 package, delivering a stable 3.0 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, supports up to 20 mA load current, and operates across −40°C to +125°C - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4128AMF-3.0/NOPB datasheet, LM4128AMF-3.0/NOPB pinout, LM4128AMF-3.0/NOPB application, or LM4128AMF-3.0/NOPB equivalent, key selection criteria include dropout voltage (≤400 mV at 10 mA), line regulation (70 ppm/V), load regulation (25–120 ppm/mA), low-noise performance (285 µVPP, 0.1–10 Hz), and stability with capacitive loads up to 10 µF without external compensation.
Technical Context
The LM4128AMF-3.0/NOPB uses an internal band-gap-derived reference core with active error correction to achieve tight initial accuracy and low thermal drift. Its enable-controlled architecture allows seamless integration into power-gated systems, while the series topology eliminates idle current waste typical of shunt references.
Designed for direct replacement of legacy references in space-constrained designs, it requires only a minimum 0.1 µF input ceramic capacitor (CIN ≥ COUT) and remains stable with output capacitance up to 10 µF - enabling robust transient response in battery-powered data acquisition front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.1% initial accuracy (A-grade) - ensures ≤3 mV absolute error at 25°C for 12-bit+ system calibration. |
| Temperature Coefficient | 75 ppm/°C max - limits drift to ±9.4 mV over −40°C to +125°C ambient, critical for industrial sensor signal chains. |
| Supply Current | 60 µA typical - enables multi-year operation from coin-cell batteries in wireless sensor nodes. |
| Shutdown Current | 3–7 µA with EN = 0 V - reduces standby power by >95% versus active mode, supporting ultra-low-power wake-on-event architectures. |
| Dropout Voltage | 175–400 mV at 10 mA load - allows operation from 3.175 V input, compatible with single Li-ion or 3.3 V LDO rails. |
| Output Noise | 285 µVPP (0.1–10 Hz) - meets noise floor requirements for 16-bit SAR ADCs without additional filtering. |
| Load Regulation | 25–120 ppm/mA - maintains <±0.36 mV output shift across full 20 mA load range, suitable for precision current sources. |
Pinout & Package
LM4128AMF-3.0/NOPB is housed in a RoHS-compliant 5-pin SOT-23 (DBV) package with 220°C/W junction-to-ambient thermal resistance, rated for −40°C to +125°C junction temperature. The no-connect (N/C) pin must remain floating per TI specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Internally unconnected; must be left floating - routing to ground or VIN violates device specification and may impair accuracy. |
| 2 - GND | Analog ground reference | Primary return path for reference core and enable circuitry; requires low-impedance connection to clean system AGND plane. |
| 3 - EN | Active-high enable control | Drives internal regulator when ≥65% of VIN; pulls to VIN or microcontroller GPIO - enables hardware-controlled power sequencing. |
| 4 - VIN | Input supply rail | Accepts 3.4 V to 5.5 V (VREF + 400 mV min); bypassed externally with ≥0.1 µF X5R/X7R ceramic capacitor placed adjacent to pin. |
| 5 - VREF | Precision 3.0 V output | Low-impedance buffered reference source; stable with 0–10 µF capacitive loads; drives ADC references, DAC bias, or op-amp feedback networks. |
Key Features
| Feature | Design Value |
|---|---|
| Enable pin with 3 µA shutdown | Reduces system quiescent current by >95%, enabling energy harvesting and battery longevity in always-on monitoring devices. |
| Stability without output capacitor | Eliminates mandatory COUT, simplifying BOM and layout - optional 1–10 µF COUT improves load transient response by >5×. |
| Low dropout (175 mV typ) | Permits operation from near-rail supplies (e.g., 3.3 V LDO output), minimizing headroom loss in compact power architectures. |
| 75 ppm/°C tempco (A-grade) | Ensures <±10 mV total drift over full industrial temperature range - sufficient for Class I instrumentation without software calibration. |
| Indefinite short-circuit protection | Limits fault current to 75 mA, preventing thermal runaway during board-level test or field overvoltage events. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensors logging temperature, humidity, and pressure at 1-second intervals for 5+ years. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for 16-bit sigma-delta ADC and analog front-end amplifiers. Use Value: 60 µA supply current and 3 µA shutdown extend CR2032 battery life beyond 60 months; 75 ppm/°C tempco avoids recalibration across seasonal ambient shifts. |
Use Scenario: 4–20 mA loop-powered transmitter in oil & gas field instrumentation exposed to −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Supplies excitation and reference voltage for bridge-based strain gauges and RTD interfaces. Use Value: −40°C to +125°C junction rating and 0.1% initial accuracy ensure compliance with IEC 61000-6-2 immunity requirements without derating. |
| Medical Patient Monitors | Automotive ADAS Calibration Modules |
Use Scenario: Portable ECG and pulse oximetry units requiring FDA-grade signal integrity and low power consumption. IC Role / Device Role / Timing Role: References high-resolution ADCs capturing biopotential waveforms with ≤2 µV RMS noise floor. Use Value: 285 µVPP (0.1–10 Hz) noise and 25 ppm/mA load regulation preserve diagnostic fidelity across varying electrode impedances. |
Use Scenario: In-vehicle camera calibration modules performing real-time lens distortion correction using FPGA-based algorithms. IC Role / Device Role / Timing Role: Supplies precise 3.0 V bias to image sensor analog signal chain and FPGA I/O banks. Use Value: AEC-Q100 Grade 1 qualification (via LM4128AQ family) and 125°C junction rating support under-hood deployment with no thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0 V, ±0.2% initial accuracy, 100 ppm/°C max, 50 µA supply current, SOT-23-3 package (no EN pin) | Lacks enable functionality and has looser accuracy/tempco; requires external shutdown circuitry for low-power modes | Select when board space is constrained and enable control is unnecessary; verify load regulation (50 ppm/mA) meets system tolerance. |
| ADR3430ARJZ-R7 | 3.0 V, ±0.1% initial accuracy, 50 ppm/°C max, 120 µA supply current, SOT-23-5 with EN pin | Lower tempco but higher quiescent current; specified for −40°C to +125°C with tighter long-term stability (30 ppm/1k hrs) | Prefer for metrology-grade applications where thermal drift dominates power budget; confirm PCB layout accommodates higher IQ dissipation. |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, LM4128AMF-3.0/NOPB uniquely balances ultra-low 60 µA supply current, integrated enable, and A-grade 0.1%/75 ppm performance in a standard SOT-23 footprint - making it optimal for portable, battery-sensitive systems requiring both precision and dynamic power control.
Availability
LM4128AMF-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, medical patient monitors, and automotive ADAS calibration modules requiring stable component supply across extended product lifecycles.
Supply support for LM4128AMF-3.0/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 and embedded processing technologies, with decades of expertise in precision analog ICs and industrial-grade reliability.
LM4128AMF-3.0/NOPB belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-power, and thermally stable operation in space-constrained, battery-operated, and harsh-environment applications.
FAQ
What is the maximum load current supported by LM4128AMF-3.0/NOPB?
The LM4128AMF-3.0/NOPB supports up to 20 mA of continuous output current while maintaining specified accuracy and regulation. At 10 mA load, its dropout voltage is guaranteed ≤400 mV; output voltage deviation remains within ±120 ppm/mA load regulation limits across the full operating temperature range. Exceeding 20 mA triggers internal current limiting, protecting the device but degrading reference stability.
Does LM4128AMF-3.0/NOPB require an output capacitor for stability?
No, LM4128AMF-3.0/NOPB is internally compensated and stable without an output capacitor - a key differentiator from many competing references. An optional 1–10 µF ceramic capacitor (COUT) may be added to improve load transient response, but it is not required for stability. Input capacitor CIN (≥0.1 µF) is mandatory and must be placed close to the VIN pin.
What is the function of Pin 1 (N/C) on LM4128AMF-3.0/NOPB?
Pin 1 of LM4128AMF-3.0/NOPB is a no-connect (N/C) terminal with no internal connection. It must be left electrically floating - connecting it to ground, VIN, or any other node violates TI's design specification and may introduce leakage paths or parasitic coupling that degrade output accuracy and long-term stability.
How does the enable pin (EN) of LM4128AMF-3.0/NOPB operate?
The EN pin of LM4128AMF-3.0/NOPB is an active-high digital control input. When pulled ≥65% of VIN (VIH), the device operates normally; when held ≤35% of VIN (VIL), 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 to a microcontroller GPIO for programmable power gating.
Is LM4128AMF-3.0/NOPB qualified for automotive applications?
LM4128AMF-3.0/NOPB itself is not AEC-Q100 qualified; however, the pin-compatible LM4128AQMF-3.0/NOPB variant is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on TI's automotive flow. For automotive ADAS or body electronics, LM4128AQMF-3.0/NOPB is the designated qualified version - identical in electrical specs but with enhanced process controls and traceability.
LM4128AMF-3.0/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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- 285µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.4V ~ 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-3.0/NOPB FAQ
1.How can I place an order for LM4128AMF-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128AMF-3.0/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 LM4128AMF-3.0/NOPB reliable?
The price and inventory of LM4128AMF-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128AMF-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128AMF-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128AMF-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128AMF-3.0/NOPB?
LM4128AMF-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128AMF-3.0/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 LM4128AMF-3.0/NOPB?
For technical support, including LM4128AMF-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128AMF-3.0/NOPB requirements.
6.How does Aetrix verify that LM4128AMF-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128AMF-3.0/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 LM4128AMF-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128AMF-3.0/NOPB?
All LM4128AMF-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128AMF-3.0/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 LM4128AMF-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128AMF-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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