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Texas Instruments LM4132EMFX-2.5/NOPB
- Part No.:
- LM4132EMFX-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132EMFX-2.5/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,407
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Product details
Overview
LM4132EMFX-2.5/NOPB from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 2.5 V output with 0.05% initial accuracy (A-grade), 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current - used in high-resolution ADC/DAC biasing, portable instrumentation, and battery-powered test equipment.
For engineers reviewing the LM4132EMFX-2.5/NOPB datasheet, LM4132EMFX-2.5/NOPB pinout, LM4132EMFX-2.5/NOPB application, or LM4132EMFX-2.5/NOPB equivalent, key selection considerations include dropout voltage (175 mV at 10 mA), enable-controlled shutdown (3 µA), load regulation (25 ppm/mA), and SOT-23-5 compatibility with ceramic capacitors only.
Technical Context
The LM4132EMFX-2.5/NOPB implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision without laser trimming. Its internal enable logic drives a high-impedance output stage that supports up to 20 mA sink/source while maintaining 0.5% output accuracy down to VIN = VREF + 175 mV.
This device operates across –40°C to +125°C ambient, meets AEC-Q100 Grade 1 for automotive use, and achieves 50 ppm long-term stability over 1000 hours - all within a 2.90 mm × 1.60 mm SOT-23-5 package with no required output capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.05% (A-grade initial accuracy at 25°C) |
| Tempco | 10 ppm/°C (0°C to 85°C), enabling <±0.25 mV drift over industrial range |
| Dropout Voltage | 175 mV at 10 mA load - allows operation from 2.675 V input in battery systems |
| Quiescent Current | 60 µA active, 3 µA in shutdown - extends runtime in always-on sensor nodes |
| Load Regulation | 25 ppm/mA (0–20 mA) - ensures <±50 µV shift under full load variation |
| Line Regulation | 50 ppm/V (VREF + 0.4 V to 5.5 V) - rejects supply ripple in noisy DC-DC outputs |
| Output Noise | 240 µVPP (0.1–10 Hz) - suitable for 16-bit+ data acquisition front-ends |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected; floating - no internal connection or function |
| 2 - GND | Analog ground reference | Primary return path for reference output and internal circuitry; requires low-impedance PCB tie to system AGND |
| 3 - EN | Active-high enable input | Drives internal pass element; VIH ≥ 65% VIN, VIL ≤ 35% VIN - compatible with 1.8 V/3.3 V logic |
| 4 - VIN | Input supply rail | Accepts 2.675 V to 5.5 V; supplies internal regulator and output stage; bypass with 1 µF ceramic |
| 5 - VREF | Precision reference output | 2.5 V source capable of sourcing/sinking 20 mA; stable without COUT but benefits from 1 µF local decoupling |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed curvature compensation | Eliminates need for external calibration; maintains 10 ppm/°C spec across temperature without laser trimming |
| Enable-controlled shutdown mode | Reduces supply current to 3 µA - enables ultra-low-power wake-up architectures in portable devices |
| Capacitor-free stability | Operates stably with low-ESR ceramic capacitors only; no tantalum or electrolytic required for phase margin |
| 20 mA output drive capability | Directly biases ADC references, op-amp gain-setting resistors, or DAC VREF pins without buffer amplifiers |
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient operation (–40°C to +125°C); HBM ESD rated ±2000 V |
Applications
| Portable Data Loggers | Automotive Battery Monitoring Units |
|---|---|
Use Scenario: Continuous 16-bit SAR ADC sampling in handheld environmental sensors powered by single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for ADC full-scale calibration and offset nulling. Use Value: Enables ±0.5 LSB INL performance over temperature due to 10 ppm/°C tempco and 240 µVPP low-frequency noise. |
Use Scenario: High-side current sensing and cell-voltage measurement in 12 V lead-acid or 48 V mild-hybrid battery packs. IC Role / Device Role / Timing Role: Supplies precision reference for isolated delta-sigma modulators and shunt amplifier gain stages. Use Value: Maintains <±0.25 mV output drift across –40°C to +125°C ambient, meeting ASIL-B functional safety margins. |
| Industrial PLC Analog Input Modules | Medical Patient Monitor Front-Ends |
Use Scenario: Multi-channel 24-bit ΣΔ ADC systems acquiring thermocouple, RTD, and 4–20 mA loop signals in factory-floor controllers. IC Role / Device Role / Timing Role: Serves as master reference for programmable gain instrumentation amplifiers and ADC reference buffers. Use Value: Delivers 50 ppm long-term stability over 1000 hrs, reducing recalibration frequency in maintenance-critical infrastructure. |
Use Scenario: Low-noise ECG/EEG signal conditioning where analog front-end SNR directly impacts diagnostic accuracy. IC Role / Device Role / Timing Role: Sets bias point and reference for ultra-low-noise instrumentation amplifiers and anti-alias filters. Use Value: 240 µVPP (0.1–10 Hz) noise floor avoids degrading sub-µV bio-potential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | Fixed 2.5 V, 50 ppm/°C max tempco, 50 µA IQ, no enable pin, SOT-23-3 | Lacks shutdown control and has higher tempco; limited to space-constrained, always-on designs | Choose when board area is critical and enable functionality is unnecessary |
| ADR3425ARJZ-R7 | 2.5 V, 10 ppm/°C, 120 µA IQ, no enable, SOT-23-5, ±0.1% initial accuracy | Higher quiescent current and looser initial accuracy; not AEC-Q100 qualified | Choose for non-automotive industrial use where lower cost outweighs shutdown and grade-A precision |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4132EMFX-2.5/NOPB uniquely combines A-grade 0.05% accuracy, 10 ppm/°C tempco, enable-driven 3 µA shutdown, and AEC-Q100 qualification - making it the only option supporting automotive-grade portable instrumentation with dynamic power management.
Availability
LM4132EMFX-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive battery monitoring, industrial PLC analog inputs, and medical patient monitor front-ends requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4132EMFX-2.5/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, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs and automotive-qualified components.
The LM4132 family was designed to deliver laser-trimmed reference performance using cost-effective CMOS + EEPROM trimming - targeting high-accuracy, low-power, and automotive-grade applications where traditional bipolar references are prohibitively expensive or power-hungry.
FAQ
What is the maximum load current supported by the LM4132EMFX-2.5/NOPB?
The LM4132EMFX-2.5/NOPB delivers up to 20 mA of output current while maintaining 0.5% output voltage accuracy. This capability eliminates the need for external buffer amplifiers when driving ADC references, DAC VREF pins, or precision resistor networks - a key advantage over shunt references and older LDO references that require output capacitance for stability.
Does the LM4132EMFX-2.5/NOPB require an output capacitor for stability?
No, the LM4132EMFX-2.5/NOPB is internally compensated and stable with low-ESR ceramic capacitors only - including configurations with no output capacitor. While a 1 µF ceramic capacitor on VREF improves transient response and PSRR, it is optional per the datasheet; this simplifies layout and reduces BOM count in space-constrained designs.
What is the minimum input voltage required for the LM4132EMFX-2.5/NOPB to regulate at 2.5 V?
The LM4132EMFX-2.5/NOPB requires a minimum input voltage of VREF + 175 mV (i.e., 2.675 V) at 10 mA load to maintain 0.5% output accuracy. Its low dropout design enables operation from partially discharged batteries or post-regulation rails where headroom is limited - critical for single-cell Li-ion and energy-harvesting systems.
Is the LM4132EMFX-2.5/NOPB qualified for automotive applications?
Yes, the LM4132EMFX-2.5/NOPB is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), with HBM ESD rating of ±2000 V. It is explicitly listed in TI's LM4132-Q1 product folder and meets automotive reliability and thermal stress requirements - making it suitable for battery monitors, ADAS sensor interfaces, and infotainment power management.
How does the enable pin (EN) function on the LM4132EMFX-2.5/NOPB?
The EN pin on the LM4132EMFX-2.5/NOPB is an active-high digital control input: logic high (≥65% VIN) enables the reference output; logic low (≤35% VIN) places the device in 3 µA shutdown mode. This feature supports dynamic power cycling in portable instruments and extends battery life in always-on monitoring systems without external FETs or sequencing logic.
LM4132EMFX-2.5/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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 240µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.9V ~ 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
LM4132EMFX-2.5/NOPB FAQ
1.How can I place an order for LM4132EMFX-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132EMFX-2.5/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 LM4132EMFX-2.5/NOPB reliable?
The price and inventory of LM4132EMFX-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132EMFX-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4132EMFX-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132EMFX-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132EMFX-2.5/NOPB?
LM4132EMFX-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132EMFX-2.5/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 LM4132EMFX-2.5/NOPB?
For technical support, including LM4132EMFX-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132EMFX-2.5/NOPB requirements.
6.How does Aetrix verify that LM4132EMFX-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4132EMFX-2.5/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 LM4132EMFX-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4132EMFX-2.5/NOPB?
All LM4132EMFX-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4132EMFX-2.5/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 LM4132EMFX-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4132EMFX-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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