My Inquiry
My Account
Texas Instruments LM4128BQ1MF3.0/NOPB
- Part No.:
- LM4128BQ1MF3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128BQ1MF3.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4128BQ1MF3.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 3.0 V output with ±0.2% initial accuracy, 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 load current-ideal for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4128BQ1MF3.0/NOPB datasheet, LM4128BQ1MF3.0/NOPB pinout, LM4128BQ1MF3.0/NOPB application, or LM4128BQ1MF3.0/NOPB equivalent, key selection criteria include its automotive-grade AEC-Q100 Grade 1 qualification, low dropout (175–400 mV), stability with capacitive loads up to 10 µF, and absence of required external output capacitor.
Technical Context
The LM4128BQ1MF3.0/NOPB employs a band-gap-derived reference core optimized for micropower operation and thermal stability across −40°C to +125°C. Its enable input uses an internal 2 µA pull-up, allowing direct connection to VIN or external logic control without external biasing.
It operates with input voltage as low as VREF + 400 mV (i.e., ≥3.4 V at 10 mA load), maintains regulation under 0–20 mA load variation, and exhibits ≤75 ppm/°C tempco over full temperature range-ensured for B-grade devices per SNVS475E Rev E.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.2% initial accuracy (B-grade) - ensures 6 mV absolute tolerance at 25°C for 12-bit ADC reference scaling |
| Temperature Coefficient | 75 ppm/°C max - limits drift to ±9.0 mV over −40°C to +125°C, critical for automotive sensor signal conditioning |
| Supply Current | 60 µA typical - enables >1-year battery life in coin-cell–powered IoT sensors drawing <10 µA average system current |
| Shutdown Current | 3–7 µA with EN = 0 V - reduces standby power by >90% versus active mode, supporting duty-cycled measurement systems |
| Dropout Voltage | 175–400 mV at 10 mA - allows operation from single Li-ion cell (3.0–4.2 V) down to 3.175 V before regulation loss |
| Load Regulation | 25–120 ppm/mA - contributes ≤2.4 mV error across full 20 mA load range, suitable for precision DAC buffer applications |
| Noise (0.1–10 Hz) | 285 µVPP - supports 16-bit resolution in low-frequency data acquisition without additional filtering |
Pinout & Package
LM4128BQ1MF3.0/NOPB is housed in a 5-pin SOT-23 (DBV) package (package number R-PDSO-G5), measuring 2.9 mm × 1.6 mm × 1.15 mm, with gull-wing leads and RoHS-compliant matte tin (Sn) lead finish. Thermal resistance θJ-A = 220°C/W enables operation at full rated load within industrial temperature limits when mounted on standard FR-4 PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected and floating; no internal connection - avoids unintended parasitic coupling or ESD path |
| 2 - GND | Analog ground reference | Primary return path for reference core and enable circuitry; requires low-impedance connection to clean analog ground plane |
| 3 - EN | Enable control input | Active-high logic input; VIH ≥65% VIN, VIL ≤35% VIN - compatible with 1.8 V, 3.3 V, and 5 V microcontroller GPIOs |
| 4 - VIN | Positive supply input | Accepts 3.4 V to 5.5 V; must exceed VREF + 400 mV for regulation - enables direct use with LDO outputs or battery rails |
| 5 - VREF | Precision reference output | Low-impedance 3.0 V source capable of sourcing up to 20 mA; stable with 0–10 µF capacitive loads including ceramic X5R/X7R |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C) - qualified for engine control modules, ADAS sensors, and body electronics |
| Capacitor-free stability | No mandatory COUT; stable with 0–10 µF loads - eliminates BOM cost and layout area for output bypass in space-constrained modules |
| Low-noise architecture | 285 µVPP (0.1–10 Hz) - meets noise floor requirements for 16-bit SAR ADCs without post-regulation filtering |
| Indefinite short-circuit protection | 75 mA current limit - prevents damage during board test, connector mating, or transient faults without latch-off |
| Input capacitor requirement | CIN ≥ 0.1 µF ceramic (X5R/X7R); CIN ≥ COUT if used - ensures startup stability and PSRR >60 dB at 1 kHz |
Applications
| Portable Medical Sensors | Automotive Cabin Pressure Sensors |
|---|---|
Use Scenario: Battery-powered wearable ECG front-end with 16-bit ADC sampling at 1 kSPS. IC Role / Device Role / Timing Role: Primary voltage reference for ADC and analog front-end gain stages. Use Value: 60 µA quiescent current extends CR2032 battery life beyond 18 months; 285 µVPP noise avoids resolution loss in sub-µV biopotential signals. |
Use Scenario: HVAC pressure transducer in vehicle cabin control module operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Stable excitation reference for piezoresistive bridge and ADC reference. Use Value: AEC-Q100 Grade 1 rating and 75 ppm/°C tempco ensure <±10 mV total error over full automotive temperature range. |
| Industrial Data Loggers | Smart Meter Analog Front Ends |
Use Scenario: Solar-powered remote environmental monitor logging temperature, humidity, and gas concentration every 5 minutes. IC Role / Device Role / Timing Role: Precision reference for multi-channel 12-bit delta-sigma ADC and sensor excitation. Use Value: Enable pin allows synchronous shutdown between readings, reducing average current to <1 µA and enabling 5+ year deployment. |
Use Scenario: Electricity meter with metrology-grade ADC requiring stable 3.0 V reference under varying line voltage and temperature. IC Role / Device Role / Timing Role: Primary reference for energy measurement IC and anti-tampering analog comparators. Use Value: 0.2% initial accuracy and 50 ppm long-term stability (1000 hrs) support Class 0.5 meter certification without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126ASA30+ | 3.0 V, 0.06% initial accuracy, 3 ppm/°C tempco, 0.9 mA supply current, SO-8 package | Higher precision and lower drift, but 15× higher quiescent current and larger footprint - suited for lab-grade instruments, not portable devices | Select MAX6126ASA30+ only when ultra-low tempco and tighter initial tolerance outweigh battery life and board space constraints. |
| ADR3430ARJZ-R7 | 3.0 V, 0.1% initial accuracy, 10 ppm/°C tempco, 120 µA supply current, SOT-23-5 package | Lower tempco and better accuracy than LM4128BQ1MF3.0/NOPB, but higher supply current and no enable pin - lacks shutdown capability | Choose ADR3430ARJZ-R7 when continuous operation and superior drift performance are prioritized over power gating and automotive qualification. |
Compared with MAX6126ASA30+ and ADR3430ARJZ-R7, LM4128BQ1MF3.0/NOPB uniquely balances AEC-Q100 Grade 1 compliance, micropower operation (60 µA), integrated enable control, and SOT-23 footprint-making it the optimal choice for cost-sensitive, battery-operated automotive and industrial edge sensors where moderate accuracy suffices.
Availability
LM4128BQ1MF3.0/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin pressure sensors, industrial data loggers, and smart meter analog front ends requiring stable component supply with automotive-grade reliability and long-lifecycle support.
Supply support for LM4128BQ1MF3.0/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 headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and consumer markets since 1930.
The LM4128 family was developed as a micropower, automotive-qualified series voltage reference line targeting high-accuracy, low-drift, and enable-controlled operation in space-constrained, battery-sensitive applications.
FAQ
What is the guaranteed initial accuracy of LM4128BQ1MF3.0/NOPB over temperature?
The LM4128BQ1MF3.0/NOPB is a B-grade device with guaranteed ±0.2% initial accuracy at 25°C and specified performance over −40°C to +125°C junction temperature. Its maximum temperature coefficient is 75 ppm/°C, contributing ≤±9.0 mV drift across the full range - confirmed in Electrical Characteristics tables for LM4128B-3.0 in SNVS475E Rev E.
Does LM4128BQ1MF3.0/NOPB require an external output capacitor?
No, LM4128BQ1MF3.0/NOPB is stable without an external output capacitor and supports capacitive loads up to 10 µF. An optional COUT improves load transient response but is not required for stability - a key differentiator from older references that mandate minimum COUT. This is explicitly stated in the "APPLICATION INFORMATION" section of the datasheet.
What is the minimum input voltage required for LM4128BQ1MF3.0/NOPB to maintain regulation at 10 mA load?
LM4128BQ1MF3.0/NOPB requires VIN ≥ VREF + 400 mV for regulation at 10 mA, i.e., ≥3.4 V. Dropout voltage is specified as 175–400 mV over temperature and load - verified in the "Electrical Characteristics" table for LM4128-3.0, ensuring reliable operation from single-cell lithium or regulated 3.3 V rails with margin.
Is LM4128BQ1MF3.0/NOPB qualified for automotive applications?
Yes, LM4128BQ1MF3.0/NOPB is LM4128Q-series and AEC-Q100 Grade 1 qualified (−40°C to +125°C), manufactured on an automotive-grade flow. The "Q" suffix and explicit listing in the "FEATURES" section confirm its suitability for engine control units, ADAS subsystems, and body electronics per TI's production data.
How does the enable pin (EN) function on LM4128BQ1MF3.0/NOPB?
The EN pin on LM4128BQ1MF3.0/NOPB is active-high with VIH ≥65% VIN and VIL ≤35% VIN. When pulled low, it reduces supply current to 3–7 µA; when high or left floating (due to internal 2 µA pull-up), the device operates normally. This behavior is documented in the PIN DESCRIPTIONS and Electrical Characteristics sections of SNVS475E.
LM4128BQ1MF3.0/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:
- ±0.2%
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128BQ1MF3.0/NOPB FAQ
1.How can I place an order for LM4128BQ1MF3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128BQ1MF3.0/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 LM4128BQ1MF3.0/NOPB reliable?
The price and inventory of LM4128BQ1MF3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128BQ1MF3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128BQ1MF3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128BQ1MF3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128BQ1MF3.0/NOPB?
LM4128BQ1MF3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128BQ1MF3.0/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 LM4128BQ1MF3.0/NOPB?
For technical support, including LM4128BQ1MF3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128BQ1MF3.0/NOPB requirements.
6.How does Aetrix verify that LM4128BQ1MF3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128BQ1MF3.0/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 LM4128BQ1MF3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128BQ1MF3.0/NOPB?
All LM4128BQ1MF3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128BQ1MF3.0/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 LM4128BQ1MF3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128BQ1MF3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128BQ1MF3.0/NOPB Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
