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Texas Instruments LM4132CQ1MFR2.5
- Part No.:
- LM4132CQ1MFR2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132CQ1MFR2.5.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,658
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Product details
Overview
LM4132CQ1MFR2.5 from Texas Instruments is a precision low-dropout (LDO) voltage reference IC delivering a stable 2.5 V output with ±0.2% initial accuracy, 20 ppm/°C temperature coefficient over –40°C to +125°C, and 60 µA quiescent current - enabling high-accuracy ADC/DAC biasing in automotive instrumentation and portable test equipment.
For engineers reviewing the LM4132CQ1MFR2.5 datasheet, LM4132CQ1MFR2.5 pinout, LM4132CQ1MFR2.5 application, or LM4132CQ1MFR2.5 equivalent, this AEC-Q100 Grade 1 qualified device supports design-in for safety-critical automotive sensors, battery-powered data loggers, and industrial control systems requiring stable 2.5 V reference under varying load and temperature conditions.
Technical Context
The LM4132CQ1MFR2.5 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, achieving laser-trimmed performance at lower cost. It operates as a series reference with enable-controlled shutdown mode (3 µA), eliminating need for external buffer amplifiers or mandatory output capacitors.
Its 400 mV dropout voltage (at 10 mA), 20 mA output drive capability, and stability with low-ESR ceramic capacitors make it suitable for space-constrained, low-power applications where input supply headroom is limited - such as 3.3 V rail-powered sensor signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal, ±0.2% initial accuracy (C grade) - ensures ≤5 mV absolute error at 25°C for 12-bit+ system calibration. |
| Tempco | 20 ppm/°C (–40°C to +125°C) - contributes ≤1.25 mV drift across full automotive temperature range. |
| Quiescent Current | 60 µA typical - enables >1-year battery life in 10 µA sleep-mode portable instruments. |
| Dropout Voltage | 175 mV at 10 mA load - allows operation from 2.675 V input, compatible with single-cell LiFePO₄ or boosted 2.5 V rails. |
| Enable Threshold | VIL ≤35% VIN, VIH ≥65% VIN - ensures robust logic-level compatibility with 1.8 V/3.3 V microcontrollers. |
| Output Noise | 240 µVPP (0.1–10 Hz) - supports 16-bit SAR ADCs without additional filtering in precision measurement front-ends. |
| Load Drive | 20 mA max - directly powers op-amp buffers, ADC reference inputs, and small analog subsystems. |
Pinout & Package
SOT-23 (DBV) 5-pin plastic package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect | Must be left floating; no internal connection - avoids unintended parasitic coupling or solder bridging. |
| 2 - GND | Analog ground reference | Primary return path for reference output and internal band-gap circuitry; requires low-impedance PCB connection. |
| 3 - EN | Active-high enable input | Drives internal pass element; pulls to VIN for operation, to GND for 3 µA shutdown - supports MCU-controlled power gating. |
| 4 - VIN | Input supply | Accepts 2.9 V to 5.5 V (VREF + 400 mV min); must be bypassed with ≥1 µF ceramic capacitor per layout guidelines. |
| 5 - VREF | Precision reference output | Delivers regulated 2.5 V; capable of sourcing up to 20 mA; requires local 0.1 µF ceramic decoupling for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation and HBM ESD Level 2 (±2 kV), enabling use in engine control modules and ADAS sensors. |
| EEPROM-trimmed curvature compensation | Eliminates need for laser trimming, reducing cost while maintaining <20 ppm/°C tempco across full temperature range. |
| Enable-controlled shutdown | Reduces supply current to 3 µA - critical for duty-cycled data acquisition systems requiring ultra-low standby power. |
| Capacitor-stable operation | Stable with low-ESR ceramic capacitors only (no tantalum or electrolytic required), simplifying BOM and improving long-term reliability. |
| 20 mA output drive | Directly drives ADC reference pins, op-amp gain-setting networks, and small analog loads - removes need for external buffers. |
Applications
| Automotive Engine Control Unit (ECU) | Portable Digital Multimeter (DMM) |
|---|---|
Use Scenario: High-precision analog front-end for oxygen sensor and knock sensor signal conditioning in harsh under-hood environments. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 16-bit ADC sampling and sensor excitation circuits. Use Value: 20 ppm/°C tempco and AEC-Q100 qualification ensure ≤1 LSB error drift over –40°C to +125°C, meeting ASAM MCD-2 MC functional safety requirements. |
Use Scenario: Battery-powered handheld DMM requiring multi-range voltage/current measurement with 0.1% basic accuracy. IC Role / Device Role / Timing Role: Serves as primary reference for dual-slope and sigma-delta ADCs across DCV, ACV, and resistance ranges. Use Value: 60 µA quiescent current and 3 µA shutdown extend alkaline battery life to >500 hours in continuous-use mode. |
| Industrial PLC Analog Input Module | Medical Patient Monitor Front-End |
Use Scenario: 4–20 mA loop-powered I/O module processing thermocouple and RTD signals in factory automation cabinets. IC Role / Device Role / Timing Role: Supplies precise 2.5 V bias to instrumentation amplifiers and cold-junction compensation circuits. Use Value: ±0.2% initial accuracy and 75 ppm thermal hysteresis ensure repeatability across repeated power cycles and ambient shifts. |
Use Scenario: Low-noise ECG/EEG signal chain in portable patient monitors where baseline stability affects diagnostic accuracy. IC Role / Device Role / Timing Role: Reference source for 24-bit delta-sigma ADCs digitizing biopotential signals below 100 µV. Use Value: 240 µVPP (0.1–10 Hz) noise floor enables ≥100 dB SNR without post-processing averaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4128CIMF-2.5/NOPB | Fixed 2.5 V output, 0.2% initial accuracy, but no enable pin and higher 100 µA quiescent current. | Lacks shutdown mode - unsuitable for battery-powered or duty-cycled systems requiring ultra-low standby power. | Select when enable functionality is unnecessary and board space permits larger SOT-23-3 footprint. |
| MAX6126AASA25+ | 2.5 V, 0.1% initial accuracy, 3 ppm/°C tempco, but requires external 1 µF output capacitor and has no enable pin. | Superior tempco and accuracy, yet incompatible with capacitor-free designs and lacks power-gating capability. | Choose for metrology-grade applications where 3 ppm/°C stability outweighs need for enable control and capacitor simplicity. |
Compared with LM4132CQ1MFR2.5, LM4128CIMF-2.5/NOPB trades enable functionality for simpler biasing, while MAX6126AASA25+ delivers tighter specs at the cost of added external components and loss of shutdown control - making LM4132CQ1MFR2.5 optimal for automotive and portable systems balancing accuracy, power control, and layout simplicity.
Availability
LM4132CQ1MFR2.5 is available at Aetrix Electronics and suitable for automotive engine control units, portable test equipment, and industrial PLC analog input modules requiring stable component supply with AEC-Q100 compliance and long-term parametric consistency.
Supply support for LM4132CQ1MFR2.5 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-qualified components.
The LM4132 family was designed specifically for high-accuracy, low-power reference needs in automotive, industrial, and portable instrumentation - combining EEPROM-based trimming with LDO architecture to replace costly laser-trimmed solutions.
FAQ
What is the operating temperature range for the LM4132CQ1MFR2.5?
The LM4132CQ1MFR2.5 is AEC-Q100 Grade 1 qualified, supporting continuous operation from –40°C to +125°C ambient temperature. Its electrical characteristics - including 20 ppm/°C tempco and ±0.2% initial accuracy - are specified across this full range, making it suitable for under-hood automotive applications and industrial environments with wide thermal swings.
Does the LM4132CQ1MFR2.5 require an output capacitor?
No, the LM4132CQ1MFR2.5 is stable without an output capacitor and does not require a buffer amplifier. A 0.1 µF ceramic capacitor is recommended at the VREF pin for noise reduction, but it is optional for stability. This simplifies layout and improves reliability compared to references mandating large output capacitance.
What is the minimum input voltage required for the LM4132CQ1MFR2.5 to maintain regulation?
The LM4132CQ1MFR2.5 requires a minimum input voltage of VREF + 400 mV = 2.9 V to maintain regulation at full load. At 10 mA load, its dropout voltage is 175 mV, meaning it regulates down to 2.675 V input - enabling use with marginally boosted or aging battery supplies in portable systems.
How does the enable pin function on the LM4132CQ1MFR2.5?
The EN pin is active-high: driving it ≥65% of VIN enables the reference output; pulling it ≤35% of VIN places LM4132CQ1MFR2.5 into shutdown mode with 3 µA supply current. This allows precise power sequencing and MCU-controlled wake-up in battery-sensitive applications without external FETs or level shifters.
Is the LM4132CQ1MFR2.5 pin-compatible with other LM4132 variants?
Yes, all LM4132 variants - including LM4132CQ1MFR2.5, LM4132CIMF-2.5, and LM4132AQ1MF-2.5 - share identical SOT-23-5 (DBV) pinout and footprint. Differences lie only in grade (A–E), automotive qualification (Q1), and output voltage option - allowing drop-in substitution within the same voltage and qualification tier.
LM4132CQ1MFR2.5 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:
- ±0.2%
- 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
LM4132CQ1MFR2.5 FAQ
1.How can I place an order for LM4132CQ1MFR2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132CQ1MFR2.5 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 LM4132CQ1MFR2.5 reliable?
The price and inventory of LM4132CQ1MFR2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132CQ1MFR2.5 is usually 5 days.
3.What payment methods are accepted for LM4132CQ1MFR2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132CQ1MFR2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132CQ1MFR2.5?
LM4132CQ1MFR2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132CQ1MFR2.5 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 LM4132CQ1MFR2.5?
For technical support, including LM4132CQ1MFR2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132CQ1MFR2.5 requirements.
6.How does Aetrix verify that LM4132CQ1MFR2.5 is sourced from the original manufacturer or authorized distributors?
All LM4132CQ1MFR2.5 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 LM4132CQ1MFR2.5 meets industry standards.
7.What is the process for return or replacement of LM4132CQ1MFR2.5?
All LM4132CQ1MFR2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132CQ1MFR2.5, 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 LM4132CQ1MFR2.5 part is unused and in its original packaging.
Return procedure for LM4132CQ1MFR2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132CQ1MFR2.5 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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AZ431LBNTR-G1
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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