My Inquiry
My Account
Texas Instruments LM4128BQ1MF2.0/NOPB
- Part No.:
- LM4128BQ1MF2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128BQ1MF2.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4128BQ1MF2.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 (DBV) package, delivering 2.048 V output with ±0.2% initial accuracy, 75 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 LM4128BQ1MF2.0/NOPB datasheet, LM4128BQ1MF2.0/NOPB pinout, LM4128BQ1MF2.0/NOPB application, or LM4128BQ1MF2.0/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, low dropout (≤400 mV at 10 mA), stability with capacitive loads up to 10 µF, and absence of required external stabilization capacitor.
Technical Context
The LM4128BQ1MF2.0/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 bias network allows seamless transition between 60 µA active operation and 3–7 µA shutdown state without output perturbation.
Designed as a series reference, it eliminates idle current waste typical of shunt types and achieves stable regulation with input-to-output differential as low as 175 mV (typical) at 10 mA load - enabling use in low-headroom battery systems down to ~2.2 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; exact value enables precise 12-bit DAC/ADC full-scale alignment (e.g., 2.048 V = 1 LSB × 2¹¹) |
| Initial Accuracy | ±0.2% (B grade); ensures ≤±4.1 mV absolute error at 25°C without calibration |
| Tempco | 75 ppm/°C max; contributes ≤±15.8 µV/°C drift over −40°C to +125°C operating range |
| Supply Current | 60 µA typical; enables >1-year runtime on a 220 mAh coin cell at 10 µA system sleep current |
| Dropout Voltage | 175–400 mV at 10 mA; supports operation from single Li-ion (3.0–4.2 V) or two alkaline cells (2.4–3.2 V) |
| Enable Threshold | VIL ≤35% VIN, VIH ≥65% VIN; compatible with standard CMOS logic driving VIN directly |
| Noise (0.1–10 Hz) | 190 µVPP; suitable for 16-bit SAR ADCs requiring <1 LSB noise floor at 2.048 V reference |
Pinout & Package
LM4128BQ1MF2.0/NOPB is housed in a RoHS-compliant 5-pin SOT-23 (DBV) package with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and 1.0 mm height - optimized for space-constrained PCB layouts in automotive and portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected; floating per datasheet - no routing or soldering allowed |
| 2 - GND | Analog ground reference | Low-impedance return path for reference core and output stage; requires dedicated ground plane tie |
| 3 - EN | Active-high enable control | Pulled internally to VIN via ~2 µA current source; driven low (<35% VIN) to enter 3–7 µA shutdown |
| 4 - VIN | Positive supply input | Accepts 2.448 V to 5.5 V; must exceed VREF by ≥400 mV for full 20 mA load capability |
| 5 - VREF | Precision reference output | Delivers regulated 2.048 V; stable with 0–10 µF capacitive loads; COUT optional but improves transient response |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B AEC-Q100 qualification | LM4128BQ variant meets Grade 1 automotive reliability (−40°C to +125°C TJ) with production flow traceability |
| No external stabilization capacitor | Internal compensation eliminates need for CCOMP, reducing BOM count and layout area vs. legacy references |
| Capacitive load tolerance | Stable with 0–10 µF ceramic output capacitance - enables direct drive of ADC sample-and-hold inputs |
| Indefinite short-circuit protection | Self-limits output current to 75 mA during fault; recovers automatically when short removed - no latch-up |
| Low ESR ceramic capacitor support | Validated with X5R/X7R dielectrics; avoids instability risks associated with high-ESR tantalum or electrolytic caps |
Applications
| Instrumentation Signal Chain | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Precision analog front-end for handheld multimeters and portable data loggers. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit sigma-delta ADC and programmable gain amplifier calibration. Use Value: ±0.2% initial accuracy and 75 ppm/°C tempco ensure <0.01% total measurement error across 0–50°C ambient range without field recalibration. |
Use Scenario: Reference for pressure, temperature, and position sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Stable 2.048 V reference for ratiometric sensor excitation and ADC conversion in AEC-Q100-compliant modules. Use Value: AEC-Q100 Grade 1 qualification and −40°C to +125°C operation guarantee functional integrity under under-hood thermal cycling. |
| Portable Medical Monitoring | Battery-Powered IoT Node |
|
Use Scenario: Power-sensitive ECG and pulse oximeter analog subsystems requiring ultra-low-noise reference. IC Role / Device Role / Timing Role: Low-noise (190 µVPP) 2.048 V reference for high-resolution biopotential ADCs and analog filters. Use Value: 60 µA quiescent current extends battery life in wearable devices; enable pin allows synchronous shutdown during sensor sleep cycles. |
Use Scenario: Compact environmental sensor node powered by CR2032 or Li-SOCl₂ primary cells. IC Role / Device Role / Timing Role: Micropower voltage reference for ADC, RTC, and MCU VREF input in intermittent wake-up architectures. Use Value: 3–7 µA shutdown current minimizes annual self-discharge impact; 175 mV dropout enables operation until battery reaches ~2.2 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6126AASA20+ | 2.048 V, ±0.06% initial accuracy, 3 ppm/°C tempco, 0.9 µA supply current, 8-pin SOIC | Higher precision and lower drift, but larger package and no enable pin; suited for lab-grade test equipment | Select for metrology-grade accuracy where size and shutdown are secondary |
| ADR3420ARJZ-R7 | 2.048 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA supply current, 5-pin SOT-23 | Lower tempco and tighter accuracy than LM4128BQ, but higher quiescent current and no AEC-Q100 qualification | Select for industrial control where extended tempco performance outweighs automotive compliance needs |
Compared with MAX6126AASA20+ and ADR3420ARJZ-R7, LM4128BQ1MF2.0/NOPB uniquely balances AEC-Q100 Grade 1 qualification, enable functionality, and micropower operation in SOT-23 - making it optimal for cost-sensitive, safety-aware automotive and portable designs where moderate precision suffices.
Availability
LM4128BQ1MF2.0/NOPB is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable instrumentation, and battery-powered IoT nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4128BQ1MF2.0/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 IC design and automotive-grade manufacturing.
LM4128BQ1MF2.0/NOPB belongs to TI's precision voltage reference product line, engineered specifically for high-reliability automotive and industrial applications demanding low drift, micropower operation, and robust thermal performance.
FAQ
What is the maximum load current supported by LM4128BQ1MF2.0/NOPB?
The LM4128BQ1MF2.0/NOPB supports up to 20 mA output current while maintaining regulation within specified accuracy limits. At 10 mA load, dropout voltage remains ≤400 mV; performance degrades gradually beyond 20 mA due to internal current limiting, with short-circuit protection engaging at ~75 mA. This makes LM4128BQ1MF2.0/NOPB suitable for driving ADC references, op-amp bias networks, and small sensor excitation circuits.
Does LM4128BQ1MF2.0/NOPB require an input capacitor?
Yes - LM4128BQ1MF2.0/NOPB requires a minimum 0.1 µF ceramic input capacitor (CIN) for stable operation. The datasheet specifies CIN ≥ COUT when an output capacitor is used, and recommends X5R or X7R dielectrics mounted close to the device. Omitting CIN risks oscillation or degraded line regulation, especially under dynamic load conditions. LM4128BQ1MF2.0/NOPB does not require an external stabilization capacitor, unlike many legacy references.
Is LM4128BQ1MF2.0/NOPB qualified for automotive applications?
Yes - LM4128BQ1MF2.0/NOPB is an AEC-Q100 Grade 1 qualified device, manufactured on TI's automotive-grade flow and rated for junction temperatures from −40°C to +125°C. Its LM4128BQ suffix explicitly denotes automotive qualification, including enhanced process controls, lot traceability, and stress testing per AEC standards. This makes LM4128BQ1MF2.0/NOPB appropriate for engine control, body electronics, and ADAS sensor modules.
What is the shutdown current of LM4128BQ1MF2.0/NOPB?
LM4128BQ1MF2.0/NOPB draws 3–7 µA in shutdown mode when the EN pin is held low (<35% of VIN). This ultra-low standby current is enabled by an internal current-source pull-up (~2 µA) on EN, allowing direct connection to VIN for always-on operation or simple GPIO control for power gating. The 3–7 µA specification is guaranteed over −40°C to +125°C, supporting energy harvesting and long-life battery applications.
Can LM4128BQ1MF2.0/NOPB drive a 10 µF capacitive load?
Yes - LM4128BQ1MF2.0/NOPB is explicitly characterized for stability with capacitive loads up to 10 µF, including low-ESR ceramic types. Adding COUT improves load transient response when switching between light and heavy loads, though it increases turn-on time (e.g., ~78.8 µs to 90% with 10 µF). No series resistance or isolation is needed, and COUT is optional - the device remains stable without it, unlike many older references requiring careful compensation.
LM4128BQ1MF2.0/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:
- ±0.2%
- Temperature Coefficient:
- 75ppm/°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
LM4128BQ1MF2.0/NOPB FAQ
1.How can I place an order for LM4128BQ1MF2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128BQ1MF2.0/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 LM4128BQ1MF2.0/NOPB reliable?
The price and inventory of LM4128BQ1MF2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128BQ1MF2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128BQ1MF2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128BQ1MF2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128BQ1MF2.0/NOPB?
LM4128BQ1MF2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128BQ1MF2.0/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 LM4128BQ1MF2.0/NOPB?
For technical support, including LM4128BQ1MF2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128BQ1MF2.0/NOPB requirements.
6.How does Aetrix verify that LM4128BQ1MF2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128BQ1MF2.0/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 LM4128BQ1MF2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128BQ1MF2.0/NOPB?
All LM4128BQ1MF2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128BQ1MF2.0/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 LM4128BQ1MF2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128BQ1MF2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4128BQ1MF2.0/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…
