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Texas Instruments LM4132AQ1MFR2.5
- Part No.:
- LM4132AQ1MFR2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132AQ1MFR2.5.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,981
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Product details
Overview
LM4132AQ1MFR2.5 from Texas Instruments is an automotive-grade precision low-dropout voltage reference IC delivering a stable 2.5 V output with ±0.05% initial accuracy, 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current. It features an enable pin for 3 µA shutdown mode and supports up to 20 mA load current in SOT-23-5 packaging - ideal for high-accuracy ADC/DAC biasing in automotive instrumentation and battery-powered test equipment.
For engineers reviewing the LM4132AQ1MFR2.5 datasheet, LM4132AQ1MFR2.5 pinout, LM4132AQ1MFR2.5 application, or LM4132AQ1MFR2.5 equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, automotive-qualified operating limits, and confirmed alternative options for precision voltage reference selection.
Technical Context
The LM4132AQ1MFR2.5 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level performance without laser trimming. Its internal LDO structure delivers regulated 2.5 V output with dropout as low as 175 mV at 10 mA load and no mandatory output capacitor requirement.
It operates across –40°C to +125°C ambient temperature, qualified per AEC-Q100 Grade 1, and integrates an enable input with 35% VIN low threshold and 65% VIN high threshold - supporting controlled power sequencing in automotive ECUs and industrial sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.05% (A-grade initial accuracy) - ensures ≤1.25 mV absolute error at 25°C for 16-bit ADC reference stability |
| Tempco | 10 ppm/°C (0°C to 85°C) - contributes ≤0.21 mV drift over industrial temperature range, critical for precision sensor signal chains |
| Quiescent Current | 60 µA typical - enables >1-year battery life in 10 µA-systems with periodic wake-up sampling |
| Shutdown Current | 3 µA max at EN = 0 V - reduces standby power by 95% vs active mode, essential for always-on automotive modules |
| Dropout Voltage | 175 mV at 10 mA load - allows operation from 2.675 V supply, compatible with single-cell LiFePO₄ or boosted coin cells |
| Line Regulation | 50 ppm/V (2.9 V to 5.5 V input) - maintains <125 µV output shift across full input range, minimizing supply-induced errors |
| Output Noise | 240 µVPP (0.1–10 Hz) - supports 18-bit effective resolution in low-frequency data acquisition systems |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected. Pin 1 is NC (no connect); pin 2 is GND; pin 3 is EN; pin 4 is VIN; pin 5 is VREF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No-connect terminal | Must remain floating - no PCB trace or thermal pad connection; internal die bond wire stub only |
| Pin 2 (GND) | Analog ground reference | Primary return path for reference output and internal band-gap core; requires dedicated low-impedance plane |
| Pin 3 (EN) | Digital enable input | Active-high logic control: drives internal pass device; VIH ≥ 65% VIN ensures robust noise margin in noisy automotive environments |
| Pin 4 (VIN) | Input supply rail | Accepts 2.9 V to 5.5 V; minimum headroom = VREF + 400 mV - defines lowest usable battery voltage before regulation loss |
| Pin 5 (VREF) | Precision output terminal | Delivers 2.5 V ±0.05%; capable of sourcing 20 mA - eliminates need for external buffer in moderate-load applications |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in automotive ECUs, including thermal cycling and HBM ±2 kV ESD robustness |
| EEPROM-trimmed curvature compensation | Eliminates need for external calibration; achieves 10 ppm/°C tempco without laser trimming or post-assembly adjustment |
| Capacitor-free stability | Operates reliably with only 1 µF ceramic CIN; removes COUT dependency - reduces BOM count and PCB area in space-constrained modules |
| Low dropout with high output current | 175 mV dropout at 10 mA enables use with low-voltage rails while sustaining 20 mA drive - suitable for powering SAR ADC references and op-amp bias networks |
| Enable-controlled shutdown | Reduces IQ to 3 µA, cutting system standby power by orders of magnitude - critical for ISO 16750-compliant sleep-mode compliance |
Applications
| Automotive Instrument Cluster Reference | Portable Data Logger ADC Bias |
|---|---|
Use Scenario: High-resolution analog front-end in digital instrument clusters requiring stable voltage reference for fuel level, speed, and temperature sensing. IC Role / Device Role / Timing Role: Primary 2.5 V reference for 16-bit SAR ADCs digitizing analog sensor signals under varying engine bay temperatures. Use Value: 10 ppm/°C tempco and AEC-Q100 qualification ensure ≤2.5 mV total drift over –40°C to +125°C, maintaining display accuracy across vehicle lifetime. |
Use Scenario: Battery-powered environmental monitoring logger capturing temperature, humidity, and pressure with 18-bit resolution. IC Role / Device Role / Timing Role: Precision reference for low-power sigma-delta ADC, enabled only during measurement cycles to conserve energy. Use Value: 3 µA shutdown current extends 2×AA battery life to >2 years at 1-sample-per-minute duty cycle, while 240 µVPP noise preserves effective resolution. |
| Industrial PLC Analog Input Module | Medical Patient Monitor Sensor Interface |
Use Scenario: DIN-rail mounted programmable logic controller with isolated 4–20 mA and thermocouple inputs requiring calibrated voltage references. IC Role / Device Role / Timing Role: Local 2.5 V reference for isolated ADCs on each channel, eliminating shared-reference crosstalk in multi-channel designs. Use Value: ±0.05% initial accuracy and 50 ppm/V line regulation reduce calibration frequency from quarterly to annual, lowering maintenance cost. |
Use Scenario: Portable ECG and SpO₂ monitor requiring ultra-low-noise, low-drift reference for biopotential amplification and digitization. IC Role / Device Role / Timing Role: Reference source for instrumentation amplifier gain-setting and ADC conversion, directly impacting diagnostic signal fidelity. Use Value: 240 µVPP (0.1–10 Hz) noise and 75 ppm thermal hysteresis prevent baseline wander and artifact misinterpretation in clinical 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 |
|---|---|---|---|
| MAX6126AASA25+ | 2.5 V, ±0.02% initial accuracy, 3 ppm/°C tempco, 1.2 mA quiescent current, SO-8 package | Higher accuracy and lower tempco but 20× higher IQ - unsuitable for battery operation; requires output capacitor | Select when ultimate long-term stability and ultra-low drift outweigh power and board space constraints |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 120 µA IQ, SOT-23-5, non-automotive grade | Lacks AEC-Q100 qualification and enable pin; same footprint but no shutdown capability | Select for cost-sensitive industrial applications where automotive qualification and low-power shutdown are not required |
Compared with MAX6126AASA25+ and ADR3425ARJZ-R7, the LM4132AQ1MFR2.5 uniquely balances automotive qualification, sub-100 µA operation, integrated enable control, and SOT-23-5 footprint - making it the only option meeting all three requirements simultaneously in space- and power-constrained automotive subsystems.
Availability
LM4132AQ1MFR2.5 is available at Aetrix Electronics and suitable for automotive instrumentation, portable test equipment, and industrial PLC analog input modules requiring stable component supply with guaranteed AEC-Q100 compliance and long-term parametric consistency.
Supply support for LM4132AQ1MFR2.5 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 ICs and automotive electronics.
The LM4132 family was designed specifically for high-accuracy, low-power voltage reference needs in automotive and industrial systems - emphasizing AEC-Q100 reliability, EEPROM-based trimming for plastic-package stability, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM4132AQ1MFR2.5?
The absolute maximum input voltage for LM4132AQ1MFR2.5 is 6 V, but the recommended operating maximum is 5.5 V. Exceeding 5.5 V may degrade long-term reliability or trigger internal protection circuits. The device requires a minimum input of VREF + 400 mV (i.e., ≥2.9 V) to maintain regulation at full load, as specified in the Recommended Operating Conditions table.
Does LM4132AQ1MFR2.5 require an output capacitor for stability?
No, LM4132AQ1MFR2.5 is internally compensated and stable without an output capacitor. The datasheet explicitly states COUT is optional, and typical applications use only the required 1 µF ceramic CIN on VIN. Adding COUT may improve PSRR at high frequencies but is not necessary for basic regulation stability or transient response.
What does the 'Q1' suffix indicate in LM4132AQ1MFR2.5?
The 'Q1' suffix denotes AEC-Q100 qualification for automotive applications, specifically Grade 1 (–40°C to +125°C ambient). This includes stress testing for temperature cycling, HBM ESD (±2 kV), and other automotive reliability requirements - distinguishing it from commercial-grade LM4132 variants like LM4132AMF2.5.
Can LM4132AQ1MFR2.5 drive a 10 kΩ load directly?
Yes. With a 2.5 V output and maximum 20 mA output current, LM4132AQ1MFR2.5 can directly drive a 10 kΩ load (drawing 250 µA) while maintaining regulation within specification. Load regulation is specified at ≤25 ppm/mA, so 250 µA load introduces <6.25 ppm (0.156 µV) error - well within its ±0.05% accuracy window.
Is the NC pin (Pin 1) safe to connect to ground or leave unconnected?
Pin 1 is a true no-connect (NC) terminal and must be left floating - neither grounded nor tied to any net. TI's datasheet specifies "No connect pin, leave floating", and internal characterization confirms no electrical connection to die. Connecting it risks unintended current paths or parasitic coupling that could affect reference accuracy or noise performance.
LM4132AQ1MFR2.5 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:
- ±0.05%
- Temperature Coefficient:
- 20ppm/°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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4132AQ1MFR2.5 FAQ
1.How can I place an order for LM4132AQ1MFR2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132AQ1MFR2.5 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 LM4132AQ1MFR2.5 reliable?
The price and inventory of LM4132AQ1MFR2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132AQ1MFR2.5 is usually 5 days.
3.What payment methods are accepted for LM4132AQ1MFR2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132AQ1MFR2.5 transactions.
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4.How is shipping managed for LM4132AQ1MFR2.5?
LM4132AQ1MFR2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132AQ1MFR2.5 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 LM4132AQ1MFR2.5?
For technical support, including LM4132AQ1MFR2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132AQ1MFR2.5 requirements.
6.How does Aetrix verify that LM4132AQ1MFR2.5 is sourced from the original manufacturer or authorized distributors?
All LM4132AQ1MFR2.5 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 LM4132AQ1MFR2.5 meets industry standards.
7.What is the process for return or replacement of LM4132AQ1MFR2.5?
All LM4132AQ1MFR2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132AQ1MFR2.5, 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 LM4132AQ1MFR2.5 part is unused and in its original packaging.
Return procedure for LM4132AQ1MFR2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132AQ1MFR2.5 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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