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Texas Instruments LM4132CQ1MFT2.5
- Part No.:
- LM4132CQ1MFT2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132CQ1MFT2.5.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,546
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Product details
Overview
LM4132CQ1MFT2.5 from Texas Instruments is a precision low-dropout (LDO) voltage reference IC in SOT-23-5 package, delivering a stable 2.5 V output with ±0.2% initial accuracy and 20 ppm/°C temperature coefficient over –40°C to +125°C. It features an enable pin for 3 µA shutdown mode, supports up to 20 mA load current, and operates from VIN = VREF + 400 mV to 5.5 V - ideal for automotive sensor signal conditioning and high-accuracy ADC biasing.
For engineers reviewing the LM4132CQ1MFT2.5 datasheet, LM4132CQ1MFT2.5 pinout, LM4132CQ1MFT2.5 application, or LM4132CQ1MFT2.5 equivalent, this page delivers verified electrical specs, automotive-grade thermal performance, SOT-23-5 terminal mapping, real-world use cases in battery-powered instrumentation, and two validated alternative parts with documented functional trade-offs.
Technical Context
The LM4132CQ1MFT2.5 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision without laser trimming. Its internal LDO regulator topology eliminates need for output buffer or mandatory output capacitor, unlike shunt references.
It integrates an active enable input (EN) that controls both quiescent current (60 µA active / 3 µA shutdown) and output regulation state, with VIH/VIL thresholds defined as 65%/35% of VIN - supporting direct interface with microcontroller GPIOs across its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.2% at 25°C - ensures ≤5 mV absolute error in 12-bit ADC reference paths |
| Tempco | 20 ppm/°C (–40°C to +125°C) - contributes ≤1.25 mV drift over full automotive ambient range |
| Dropout Voltage | 175 mV at 10 mA load - enables operation from 2.675 V supply in low-voltage battery systems |
| Supply Current | 60 µA typical - supports >10-year battery life in always-on sensor nodes drawing <100 µA total |
| Load Regulation | 25 ppm/mA - maintains ≤0.0625 mV change per mA load shift, critical for dynamic current-sense circuits |
| Output Noise | 240 µVPP (0.1–10 Hz) - suitable for 16-bit SAR ADCs requiring sub-LSB reference stability |
| Enable Threshold | VIL = 35% VIN, VIH = 65% VIN - ensures robust logic-level compatibility with 3.3 V and 5 V MCUs |
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, and pin 5 is VREF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No-connect | Must be left floating; no internal connection - avoids unintended parasitic coupling |
| Pin 2 (GND) | Analog ground reference | Primary return path for reference output and internal band-gap core; requires low-impedance PCB tie to system AGND |
| Pin 3 (EN) | Digital enable input | Active-high control: drives output into regulation when ≥65% VIN; pulls output high-impedance when <35% VIN |
| Pin 4 (VIN) | Input supply | Accepts 2.9 V to 5.5 V; supplies internal LDO and band-gap circuitry; bypass capacitor (CIN) required |
| Pin 5 (VREF) | Precision output | 2.5 V reference source capable of sourcing/sinking ±20 mA; stable with ceramic capacitors ≥1 µF |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive powertrain and chassis module requirements |
| EEPROM-trimmed curvature compensation | Eliminates need for external calibration - achieves 20 ppm/°C tempco without laser trimming or post-assembly adjustment |
| Low-quiescent-current shutdown | 3 µA max IQ in EN = low state - extends battery runtime in wake-on-event sensor systems |
| Capacitor-stable operation | Stable with low-ESR ceramic capacitors only - removes need for tantalum or electrolytic output caps, reducing BOM cost and footprint |
| High output drive capability | 20 mA continuous sink/source - directly drives ADC reference inputs, op-amp bias networks, and DAC buffers without external gain stages |
Applications
| Automotive Engine Control Unit (ECU) Sensor Biasing | Portable Precision Data Logger |
|---|---|
Use Scenario: Providing stable excitation voltage to RTD and strain gauge bridges in engine coolant temperature and manifold pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference supplying 2.5 V bias to Wheatstone bridge front-end amplifiers. Use Value: ±0.2% initial accuracy and 20 ppm/°C tempco ensure <0.1% total measurement error over full engine operating range. |
Use Scenario: Serving as reference for 16-bit SAR ADC in handheld environmental monitoring equipment powered by Li-ion battery. IC Role / Device Role / Timing Role: Low-noise, low-power reference enabling high-resolution analog-to-digital conversion during intermittent sampling. Use Value: 240 µVPP (0.1–10 Hz) noise and 60 µA supply current maximize SNR and extend battery life beyond 12 months. |
| Industrial PLC Analog Input Module | Medical Patient Monitor Front-End |
Use Scenario: Calibrating multi-channel 24-bit delta-sigma ADCs in programmable logic controller I/O cards. IC Role / Device Role / Timing Role: Primary reference source for ratiometric scaling of isolated current-loop (4–20 mA) and voltage (±10 V) inputs. Use Value: Load regulation of 25 ppm/mA prevents channel-to-channel gain mismatch when multiple ADCs share single reference rail. |
Use Scenario: Supplying reference voltage to ECG amplifier and respiration ADC in Class II medical devices. IC Role / Device Role / Timing Role: Safety-critical analog reference ensuring accurate biopotential amplitude measurement under varying supply conditions. Use Value: AEC-Q100 Grade 1 qualification and long-term stability of 50 ppm/1000 hrs support IEC 60601-1 compliance and 5-year device calibration intervals. |
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, ±0.06% initial accuracy, 3 ppm/°C tempco, 0.9 µA shutdown current, SO-8 package | Higher precision and lower noise, but larger footprint and no enable pin - suited for lab-grade test equipment, not space-constrained automotive modules | Select when ultra-low tempco and noise outweigh size and control-pin requirements |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% initial accuracy, 10 ppm/°C tempco, 3.8 µA shutdown, SOT-23-5, no AEC-Q100 qualification | Same package and enable functionality, but unqualified for automotive - acceptable for industrial control where ambient ≤105°C | Select for cost-sensitive industrial designs where Grade 1 automotive qualification is unnecessary |
Compared with MAX6126AASA25+ and ADR3425ARJZ-R7, the LM4132CQ1MFT2.5 uniquely balances AEC-Q100 Grade 1 compliance, SOT-23-5 footprint, integrated enable control, and 20 ppm/°C tempco - making it the only option qualified for under-hood automotive use without sacrificing board space or system-level power management.
Availability
LM4132CQ1MFT2.5 is available at Aetrix Electronics and suitable for automotive engine control units, portable data acquisition systems, industrial PLC analog input modules, and medical patient monitor front-ends requiring stable component supply with guaranteed long-term availability.
Supply support for LM4132CQ1MFT2.5 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade 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-qualified applications where reliability and thermal stability are critical.
FAQ
What is the maximum load current supported by the LM4132CQ1MFT2.5?
The LM4132CQ1MFT2.5 supports up to 20 mA of continuous output current while maintaining specified accuracy and regulation. This capability allows it to directly drive ADC reference inputs, op-amp bias networks, and small-signal transducers without external buffering - a key advantage over traditional shunt references that require idle current under no-load conditions.
Does the LM4132CQ1MFT2.5 require an output capacitor for stability?
No, the LM4132CQ1MFT2.5 is stable with or without an output capacitor and does not require a minimum ESR. It is specifically characterized to operate stably with low-ESR ceramic capacitors (≥1 µF), eliminating dependency on tantalum or electrolytic types - simplifying layout and improving reliability in automotive and portable applications.
What is the dropout voltage specification for the LM4132CQ1MFT2.5 at 10 mA load?
The dropout voltage for the LM4132CQ1MFT2.5 is 175 mV at 10 mA load and 25°C, rising to a maximum of 400 mV across –40°C to +125°C. This low dropout enables reliable operation from supplies as low as 2.675 V, making it suitable for single-cell Li-ion or coin-cell–powered systems where headroom is constrained.
Is the LM4132CQ1MFT2.5 qualified for automotive applications?
Yes, the LM4132CQ1MFT2.5 is AEC-Q100 Grade 1 qualified, with device-level testing confirming operation from –40°C to +125°C ambient temperature and HBM ESD rating of ±2000 V. This qualification validates its suitability for engine control, transmission, and chassis modules where extended temperature range and robustness are mandatory.
How does the enable pin (EN) function on the LM4132CQ1MFT2.5?
The EN pin on the LM4132CQ1MFT2.5 is an active-high digital control input: when pulled ≥65% of VIN, the device enters normal regulation mode (60 µA IQ); when pulled ≤35% of VIN, it enters shutdown mode (3 µA IQ) and places VREF in high-impedance state. This enables precise power sequencing and ultra-low-power sleep states in battery-operated systems.
LM4132CQ1MFT2.5 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
LM4132CQ1MFT2.5 FAQ
1.How can I place an order for LM4132CQ1MFT2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132CQ1MFT2.5 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 LM4132CQ1MFT2.5 reliable?
The price and inventory of LM4132CQ1MFT2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132CQ1MFT2.5 is usually 5 days.
3.What payment methods are accepted for LM4132CQ1MFT2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132CQ1MFT2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132CQ1MFT2.5?
LM4132CQ1MFT2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132CQ1MFT2.5 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 LM4132CQ1MFT2.5?
For technical support, including LM4132CQ1MFT2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132CQ1MFT2.5 requirements.
6.How does Aetrix verify that LM4132CQ1MFT2.5 is sourced from the original manufacturer or authorized distributors?
All LM4132CQ1MFT2.5 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 LM4132CQ1MFT2.5 meets industry standards.
7.What is the process for return or replacement of LM4132CQ1MFT2.5?
All LM4132CQ1MFT2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132CQ1MFT2.5, 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 LM4132CQ1MFT2.5 part is unused and in its original packaging.
Return procedure for LM4132CQ1MFT2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132CQ1MFT2.5 Tags
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TL431AIDBZR
Texas Instruments
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LM4040D20IDBZR
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LM4040DIM3X-2.5/NOPB
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