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Texas Instruments LM4128CQ1MF2.0/NOPB
- Part No.:
- LM4128CQ1MF2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128CQ1MF2.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,103
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Product details
Overview
LM4128CQ1MF2.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 2.048 V output with ±0.5% 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 LM4128CQ1MF2.0/NOPB datasheet, LM4128CQ1MF2.0/NOPB pinout, LM4128CQ1MF2.0/NOPB application, or LM4128CQ1MF2.0/NOPB equivalent, key selection criteria include its grade-C initial accuracy, dropout voltage of 175–400 mV at 10 mA, stability with capacitive loads up to 10 µF, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4128CQ1MF2.0/NOPB implements a band-gap-based series voltage reference architecture with internal enable control logic and no external stabilization capacitor required. Its design ensures stability with low-ESR ceramic capacitors and tolerates input voltages from (VREF + 400 mV) to 5.5 V.
It delivers 2.048 V nominal output across −40°C to +125°C junction temperature, with guaranteed long-term stability of ≤50 ppm over 1000 hours and thermal hysteresis of ≤75 ppm - enabling high-accuracy ADC/DAC biasing in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit DAC/ADC full-scale calibration without trimming |
| Initial Accuracy | ±0.5% (Grade C); ensures ≤10.24 mV absolute error at room temperature |
| Tempco | 100 ppm/°C max; limits drift to ≤209 µV over −40°C to +125°C span |
| Supply Current | 60 µA typical; supports >1-year operation on coin-cell batteries in always-on sensing nodes |
| Shutdown Current | 3–7 µA with EN = 0 V; allows ultra-low-power duty-cycled measurement systems |
| Dropout Voltage | 175–400 mV at 10 mA; permits operation from single Li-ion or 3.3 V rail with margin |
| Load Drive | 20 mA max; sufficient to drive SAR ADC reference inputs and op-amp buffers directly |
Pinout & Package
LM4128CQ1MF2.0/NOPB uses the 5-pin SOT-23 (DBV) package - 2.9 mm × 1.6 mm × 1.15 mm body, gull-wing leads, RoHS-compliant matte tin lead finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected; floating - not tied to GND or any other node |
| 2 - GND | Analog ground reference | Primary return path for reference current; requires low-impedance PCB connection to system AGND |
| 3 - EN | Active-high enable input | Drives internal regulator when ≥65% of VIN; pulls down to disable (≤35% VIN) |
| 4 - VIN | Input supply rail | Accepts 2.448 V to 5.5 V; must exceed VREF by ≥400 mV for regulation |
| 5 - VREF | Precision output terminal | Delivers stable 2.048 V; requires ≥0.1 µF ceramic CIN; COUT optional but improves transient response |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive applications operating from −40°C to +125°C junction temperature |
| Capacitor-free stability | No mandatory output capacitor; stable with 0–10 µF capacitive loads - simplifies layout and reduces BOM count |
| Low-noise output | 190 µVPP (0.1–10 Hz); suitable for 16-bit+ data acquisition systems requiring clean reference rails |
| Indefinite short-circuit protection | Limits output current to 75 mA during fault; prevents damage during board-level ESD or wiring errors |
| Low thermal hysteresis | ≤75 ppm; minimizes calibration drift after thermal cycling in industrial field equipment |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitoring unit logging temperature, humidity, and pressure every 5 minutes. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for 16-bit sigma-delta ADC measuring sensor bridge outputs. Use Value: Grade-C accuracy and 100 ppm/°C tempco ensure <±0.1% total measurement error across automotive cabin temperature range. | Use Scenario: Occupant detection system using capacitive sensing in vehicle seats. IC Role / Device Role / Timing Role: Supplies excitation reference for analog front-end amplifiers and ADCs processing seat capacitance changes. Use Value: AEC-Q100 Grade 1 rating and −40°C to +125°C operation guarantee reliability under hood and cabin thermal stress. |
| Industrial PLC Analog Inputs | Medical Patient Monitor Front-End |
Use Scenario: Modular I/O card in programmable logic controller acquiring 4–20 mA loop signals via precision shunt resistor. IC Role / Device Role / Timing Role: Reference source for 24-bit delta-sigma ADC converting shunt voltage to digital current value. Use Value: 50 ppm long-term stability over 1000 hrs maintains calibration integrity between scheduled maintenance cycles. | Use Scenario: Portable ECG module digitizing biopotential signals with high common-mode rejection. IC Role / Device Role / Timing Role: Precision reference for instrumentation amplifier gain-setting and ADC conversion reference. Use Value: 190 µVPP low-frequency noise avoids baseline wander artifacts in sub-Hz physiological waveforms. |
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 (Grade A), 50 ppm/°C tempco, 50 µA IQ, SOT-23-5 | Higher accuracy and lower tempco; lacks enable pin and AEC-Q100 qualification | Preferred where higher precision is critical and automotive qualification is not required |
| MAX6029AEUR+T | 2.048 V, ±0.2% initial accuracy, 75 ppm/°C tempco, 35 µA IQ, SOT-23-5, no enable | Lower quiescent current; no shutdown mode; not AEC-Q100 qualified | Optimal for ultra-low-power portable medical devices where enable control is unnecessary |
Compared with LM4128CQ1MF2.0/NOPB, REF3020AIDBZR offers tighter accuracy and tempco but omits enable functionality and automotive qualification; MAX6029AEUR+T provides lower IQ but no shutdown capability - making LM4128CQ1MF2.0/NOPB uniquely suited for AEC-Q100-compliant systems requiring controlled power sequencing.
Availability
LM4128CQ1MF2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial PLC analog inputs requiring stable component supply with automotive-grade reliability and long-term parametric consistency.
Supply support for LM4128CQ1MF2.0/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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-qualified components.
The LM4128 product line delivers micropower, high-accuracy series voltage references optimized for space-constrained, battery-operated, and automotive applications demanding AEC-Q100 compliance and robust thermal performance.
FAQ
What is the maximum input voltage for LM4128CQ1MF2.0/NOPB?
The LM4128CQ1MF2.0/NOPB supports a maximum input voltage of 5.5 V. Operation above this level risks permanent damage. The minimum input is VREF + 400 mV (i.e., ≥2.448 V at 10 mA load), ensuring regulation integrity across the full temperature range. Absolute maximum ratings specify −0.3 V to 6 V on any pin, but sustained operation beyond 5.5 V violates functional specifications.
Does LM4128CQ1MF2.0/NOPB require an external output capacitor?
No, LM4128CQ1MF2.0/NOPB is stable without an external output capacitor and is certified to drive capacitive loads up to 10 µF. An output capacitor (COUT) is optional but recommended to improve load transient response - especially when switching between light and heavy loads. Input capacitor CIN (≥0.1 µF ceramic) is mandatory for stability.
What does the 'CQ' suffix indicate in LM4128CQ1MF2.0/NOPB?
The 'CQ' in LM4128CQ1MF2.0/NOPB denotes Grade C initial accuracy (±0.5%) and AEC-Q100 Grade 1 qualification. The 'Q' confirms automotive flow manufacturing; 'C' specifies the accuracy grade per the LM4128 family datasheet. This distinguishes it from LM4128AQ (±0.1%), LM4128BQ (±0.2%), and LM4128DQ (±1.0%).
How does the enable pin (EN) function on LM4128CQ1MF2.0/NOPB?
The EN pin on LM4128CQ1MF2.0/NOPB is active-high with VIH ≥65% of VIN and VIL ≤35% of VIN. When pulled high (≥65% VIN), the device regulates normally; when pulled low (≤35% VIN), it enters shutdown mode drawing only 3–7 µA. The pin has an internal ~2 µA pull-up, so tying EN to VIN enables continuous operation without external circuitry.
Is LM4128CQ1MF2.0/NOPB compatible with lead-free reflow processes?
Yes, LM4128CQ1MF2.0/NOPB is RoHS-compliant with matte tin (Sn) lead finish and rated MSL Level-1 (260°C peak reflow, unlimited floor life). It supports standard lead-free soldering profiles including vapor phase (60 sec at 215°C) and infrared (15 sec at 220°C), per TI's packaging documentation.
LM4128CQ1MF2.0/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:
- ±0.5%
- 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
LM4128CQ1MF2.0/NOPB FAQ
1.How can I place an order for LM4128CQ1MF2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128CQ1MF2.0/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 LM4128CQ1MF2.0/NOPB reliable?
The price and inventory of LM4128CQ1MF2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128CQ1MF2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128CQ1MF2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128CQ1MF2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128CQ1MF2.0/NOPB?
LM4128CQ1MF2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128CQ1MF2.0/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 LM4128CQ1MF2.0/NOPB?
For technical support, including LM4128CQ1MF2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128CQ1MF2.0/NOPB requirements.
6.How does Aetrix verify that LM4128CQ1MF2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128CQ1MF2.0/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 LM4128CQ1MF2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128CQ1MF2.0/NOPB?
All LM4128CQ1MF2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128CQ1MF2.0/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 LM4128CQ1MF2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128CQ1MF2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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