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Texas Instruments LM4128DQ1MF3.3/NOPB
- Part No.:
- LM4128DQ1MF3.3/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DQ1MF3.3/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,801
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Product details
Overview
LM4128DQ1MF3.3/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 3.3 V output with ±0.1% initial accuracy (Grade A), 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 LM4128DQ1MF3.3/NOPB datasheet, LM4128DQ1MF3.3/NOPB pinout, LM4128DQ1MF3.3/NOPB application, or LM4128DQ1MF3.3/NOPB equivalent, key selection criteria include dropout voltage (≤400 mV at 10 mA), stability with capacitive loads up to 10 µF, and operation across −40°C to +125°C junction temperature.
Technical Context
The LM4128DQ1MF3.3/NOPB implements a band-gap–derived series reference architecture with internal enable control logic and no external stabilization capacitor required. Its design ensures stability with low-ESR ceramic capacitors (CIN ≥ 0.1 µF, COUT optional up to 10 µF) and maintains regulation under line variations (ΔVREF/ΔVIN ≤ 85 ppm/V) and load shifts (ΔVREF/ΔILOAD ≤ 120 ppm/mA).
It operates with VIN ≥ VREF + 400 mV (i.e., ≥3.7 V at 10 mA), delivers 310 µVPP (0.1–10 Hz) output noise, and provides indefinite short-circuit protection (75 mA limit). The device is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal, ±0.1% initial accuracy (Grade A) - enables 12-bit ADC biasing without trimming |
| Tempco | 75 ppm/°C max - ensures ≤±0.99 mV drift over −40°C to +125°C operating range |
| Supply Current | 60 µA typical - supports >1-year battery life in 10 µA-sleep IoT sensor nodes |
| Shutdown Current | 3 µA max when EN = 0 V - allows ultra-low-power duty-cycled reference activation |
| Dropout Voltage | 175–400 mV at 10 mA - permits operation from single-cell Li-ion (3.4 V min) or 3.3 V LDO rails |
| Load Capability | 20 mA max - drives SAR ADC reference inputs, op-amp bias networks, and DAC buffers directly |
| Noise (0.1–10 Hz) | 310 µVPP - meets <1 LSB error budget for 16-bit 3.3 V full-scale converters |
Pinout & Package
LM4128DQ1MF3.3/NOPB uses the 5-pin SOT-23 (DBV) package (Package Number DBV, R-PDSO-G5), with 1.6 mm × 2.9 mm footprint and 1.0 mm height. Pin 1 is N/C (no connect); pins are arranged top-view as: 1=N/C, 2=GND, 3=EN, 4=VIN, 5=VREF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (N/C) | No-connect terminal | Must be left floating - not bonded internally; PCB pad may be omitted or isolated |
| Pin 2 (GND) | Analog ground reference | Primary return path for reference current; requires low-impedance connection to clean AGND plane |
| Pin 3 (EN) | Digital enable input | Active-high control: VIH ≥ 65% VIN, VIL ≤ 35% VIN; internal 2 µA pull-up allows direct VIN tie if always enabled |
| Pin 4 (VIN) | Input supply rail | Accepts 3.7–5.5 V; must exceed VREF by ≥400 mV for regulation; bypass with ≥0.1 µF ceramic capacitor |
| Pin 5 (VREF) | Precision output terminal | 3.3 V reference source; stable with 0–10 µF capacitive loads; connects to ADC REF+, DAC VREF, or op-amp non-inverting input |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with zero output capacitance - eliminates BOM cost and layout area for COUT in space-constrained designs |
| Capacitive load drive | Guaranteed stability with up to 10 µF ceramic output capacitance - improves transient response for pulsed ADC sampling |
| Low dropout | 200 mV typical dropout at 10 mA - enables use after low-headroom LDOs or in energy-harvesting systems |
| AEC-Q100 Grade 1 | Qualified for automotive applications (−40°C to +125°C TJ) - supports engine control, ADAS sensor modules, and infotainment power domains |
| Thermal hysteresis | 75 ppm max - ensures repeatable output voltage after thermal cycling, critical for calibration-critical test equipment |
Applications
| Portable Data Acquisition | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Handheld multimeter measuring 0–3.3 V signals with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC full-scale calibration and offset nulling. Use Value: 310 µVPP low-frequency noise and 75 ppm/°C tempco ensure <±0.5 LSB total error across operating temperature. |
Use Scenario: Wireless pressure sensor node powered by coin cell, transmitting via BLE. IC Role / Device Role / Timing Role: Precision bias source for bridge amplifier and ADC reference during active measurement bursts. Use Value: 3 µA shutdown current extends battery life to >2 years; 60 µA active current enables fast wake-up and measurement. |
| Automotive Sensor Interface | Industrial Process Control |
|
Use Scenario: Engine coolant temperature sensor signal conditioning in powertrain ECU. IC Role / Device Role / Timing Role: Stable 3.3 V reference for ratiometric RTD-to-digital conversion circuitry. Use Value: AEC-Q100 Grade 1 qualification and −40°C to +125°C operation guarantee reliability in under-hood environments. |
Use Scenario: 4–20 mA loop-powered transmitter with HART modulation and local display. IC Role / Device Role / Timing Role: Reference for DAC generating analog output and for internal ADC monitoring supply rail. Use Value: 20 mA output drive capability powers both DAC and auxiliary circuits; 0.1% initial accuracy reduces factory calibration time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3033AIDBZR | 3.3 V, ±0.2% initial accuracy, 100 ppm/°C, 50 µA IQ, SOT-23-3 - no enable pin, 3-pin package | Lacks shutdown control; unsuitable for duty-cycled systems requiring microamp sleep states | Select when board space is constrained and continuous operation is acceptable |
| ADR3433ARJZ-R7 | 3.3 V, ±0.1% initial accuracy, 30 ppm/°C, 120 µA IQ, SOT-23-5 - lower tempco but higher quiescent current | Higher supply current reduces battery life in portable devices; superior tempco benefits high-accuracy lab equipment | Select when long-term stability and ultra-low drift outweigh power budget constraints |
Compared with REF3033AIDBZR and ADR3433ARJZ-R7, LM4128DQ1MF3.3/NOPB uniquely balances Grade-A accuracy, ultra-low shutdown current (3 µA), and automotive qualification - making it optimal for safety-aware, battery-limited embedded systems where enable control and thermal robustness are mandatory.
Availability
LM4128DQ1MF3.3/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor interfaces, and industrial process control systems requiring stable component supply with guaranteed long-term availability and AEC-Q100 compliance.
Supply support for LM4128DQ1MF3.3/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
LM4128DQ1MF3.3/NOPB belongs to TI's precision voltage reference product line, designed specifically for high-accuracy, low-power, and automotive-qualified applications where stability, small size, and enable-controlled power gating are essential.
FAQ
What is the minimum input voltage required for LM4128DQ1MF3.3/NOPB to regulate at 3.3 V?
The LM4128DQ1MF3.3/NOPB requires VIN ≥ VREF + 400 mV, i.e., ≥3.7 V at 10 mA load. At lighter loads, dropout decreases - e.g., 200 mV typical at 10 mA - but 3.7 V ensures guaranteed regulation across grade, temperature, and process variation. Below this, output voltage drops nonlinearly.
Does LM4128DQ1MF3.3/NOPB require an input capacitor, and what value is recommended?
Yes - a minimum 0.1 µF ceramic capacitor (X5R/X7R) is required between VIN and GND for stability. If COUT > 0, then CIN ≥ COUT. For best noise performance and startup overshoot suppression, 4.7–22 µF is recommended. Mount CIN within 2 mm of pins 4 and 2 to minimize parasitic inductance.
Can LM4128DQ1MF3.3/NOPB drive a 10 µF output capacitor, and how does it affect performance?
Yes - LM4128DQ1MF3.3/NOPB is explicitly characterized stable with up to 10 µF capacitive loads. Adding COUT improves load transient response (e.g., 0→10 mA step) but increases turn-on time (78.8 µs for 10 µF vs. 33.2 µs for 1 µF). COUT is optional and should be omitted if fast enable/disable cycling is required.
What is the thermal hysteresis specification for LM4128DQ1MF3.3/NOPB, and why does it matter?
LM4128DQ1MF3.3/NOPB has a maximum thermal hysteresis of 75 ppm - meaning its output voltage at 25°C may shift by ≤±0.2475 mV after cycling from −40°C to +125°C and back. This matters in calibration-critical systems (e.g., metrology equipment) where repeatability after environmental stress is mandatory for traceable measurements.
Is LM4128DQ1MF3.3/NOPB pin-compatible with other LM4128 variants like LM4128AMF-3.3/NOPB?
Yes - all LM4128xMF-x.x/NOPB variants share identical 5-pin SOT-23 (DBV) packaging and pinout (1=N/C, 2=GND, 3=EN, 4=VIN, 5=VREF). Grade (A/B/C/D), voltage option (1.8–4.096 V), and qualification (Q vs non-Q) do not affect mechanical or electrical pin compatibility. LM4128DQ1MF3.3/NOPB replaces LM4128AMF-3.3/NOPB in automotive designs requiring Grade 1 qualification.
LM4128DQ1MF3.3/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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 310µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.7V ~ 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
LM4128DQ1MF3.3/NOPB FAQ
1.How can I place an order for LM4128DQ1MF3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DQ1MF3.3/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 LM4128DQ1MF3.3/NOPB reliable?
The price and inventory of LM4128DQ1MF3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128DQ1MF3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DQ1MF3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DQ1MF3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DQ1MF3.3/NOPB?
LM4128DQ1MF3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DQ1MF3.3/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 LM4128DQ1MF3.3/NOPB?
For technical support, including LM4128DQ1MF3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DQ1MF3.3/NOPB requirements.
6.How does Aetrix verify that LM4128DQ1MF3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DQ1MF3.3/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 LM4128DQ1MF3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DQ1MF3.3/NOPB?
All LM4128DQ1MF3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DQ1MF3.3/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 LM4128DQ1MF3.3/NOPB part is unused and in its original packaging.
Return procedure for LM4128DQ1MF3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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