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Texas Instruments LM4132CMFX-2.5
- Part No.:
- LM4132CMFX-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132CMFX-2.5.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,885
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Product details
Overview
LM4132CMFX-2.5 from Texas Instruments is a precision low-dropout 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 automotive sensor signal conditioning.
For engineers reviewing the LM4132CMFX-2.5 datasheet, LM4132CMFX-2.5 pinout, LM4132CMFX-2.5 application, or LM4132CMFX-2.5 equivalent, key selection criteria include dropout voltage (175 mV at 10 mA), enable-controlled shutdown (3 µA), load regulation (25 ppm/mA), and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4132CMFX-2.5 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision without laser trimming. It operates as a series reference with internal pass element, requiring only an input capacitor (CIN) and optionally an output capacitor (COUT) for stability.
Its enable pin supports active-high logic control (VIH ≥ 65% VIN), allowing seamless integration into power-managed systems. The device maintains regulation across –40°C to +125°C ambient, with thermal hysteresis limited to 75 ppm and long-term stability of 50 ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.05% (A-grade) - ensures <1.25 mV absolute error at 25°C for 16-bit+ data converters |
| Tempco | 10 ppm/°C (0°C to 85°C) - contributes ≤0.21 mV drift over industrial temperature range |
| Dropout Voltage | 175 mV at 10 mA load - enables operation from 2.675 V supply, critical for single-cell Li-ion or 3.3 V rail derivation |
| Quiescent Current | 60 µA - supports >1-year battery life in always-on sensor nodes drawing <10 µA average |
| Shutdown Current | 3 µA - reduces system standby power by >95% when EN = 0 V |
| Load Regulation | 25 ppm/mA - holds output within ±0.0625 mV across 0–20 mA load variation |
| Noise (0.1–10 Hz) | 240 µVPP - meets SNR requirements for 18-bit SAR ADCs without external filtering |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads. RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N/C | No-connect terminal - must remain unconnected and floating per datasheet |
| 2 | GND | Analog ground reference - requires low-impedance connection to clean system ground plane |
| 3 | EN | Active-high enable input - drives internal regulator; VIH ≥ 65% VIN required for turn-on |
| 4 | VIN | Input supply - accepts 2.9 V to 5.5 V (VREF + 400 mV min); bypass with ≥1 µF ceramic capacitor |
| 5 | VREF | Precision output - delivers regulated 2.5 V; stable with low-ESR ceramic capacitors (COUT optional) |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed curvature compensation | Eliminates need for laser trimming, achieving 0.05% accuracy while maintaining plastic-package cost structure |
| Enable-controlled shutdown mode | Reduces supply current to 3 µA, enabling rapid power cycling in duty-cycled measurement systems |
| 20 mA output drive capability | Directly sources ADC reference inputs, DAC bias networks, or op-amp references without buffer amplifiers |
| Stable with low-ESR ceramic capacitors | Supports compact, high-reliability designs using X7R/X5R MLCCs instead of bulkier tantalum or electrolytic types |
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient operation from –40°C to +125°C, including HBM ESD Level 2 (±2 kV) |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitoring units logging temperature, humidity, and pressure at 10-second intervals. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 16-bit sigma-delta ADCs measuring sensor bridge outputs. Use Value: 10 ppm/°C tempco and 240 µVPP low-frequency noise ensure <0.01% measurement repeatability across –20°C to +70°C operating range. |
Use Scenario: Occupant detection and air quality sensing modules inside vehicle dashboards and seats. IC Role / Device Role / Timing Role: Supplies precision bias voltage for MEMS accelerometer and CO₂ sensor signal chains. Use Value: AEC-Q100 Grade 1 qualification and 75 ppm thermal hysteresis guarantee calibration integrity after repeated thermal cycling in cabin environments. |
| Industrial PLC Analog Inputs | Medical Patient Monitoring |
Use Scenario: Modular I/O cards in programmable logic controllers acquiring 4–20 mA loop signals and thermocouple voltages. IC Role / Device Role / Timing Role: Serves as master reference for multi-channel 24-bit delta-sigma ADCs with simultaneous sampling. Use Value: 25 ppm/mA load regulation and 50 ppm long-term stability eliminate recalibration needs over 12-month maintenance cycles. |
Use Scenario: Portable ECG and pulse oximetry devices requiring FDA-cleared analog front-end accuracy. IC Role / Device Role / Timing Role: Generates low-noise reference for instrumentation amplifiers and anti-aliasing filters in biopotential acquisition paths. Use Value: 60 µA quiescent current and 3 µA shutdown mode extend single-charge battery life to >72 hours during continuous monitoring. |
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 (–40°C to +125°C), 50 µA IQ, no enable pin | Lacks shutdown control; lower drive strength (25 mA) but tighter tempco spec over full range | Choose REF3025AIDBZR when enable functionality is unnecessary and full-temperature-range tempco is prioritized over ultra-low IQ |
| ADR3425ARJZ-R7 | 2.5 V, 10 ppm/°C (0°C to 70°C), 120 µA IQ, no enable, SOT-23-5 | Higher quiescent current; tempco spec applies only to commercial range, not extended industrial | Choose ADR3425ARJZ-R7 where board space matches and higher IQ is acceptable for improved PSRR (−80 dB @ 1 kHz) |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4132CMFX-2.5 uniquely combines AEC-Q100 qualification, 3 µA shutdown, and 10 ppm/°C tempco over 0°C–85°C - making it optimal for automotive and battery-sensitive industrial designs requiring both precision and power control.
Availability
LM4132CMFX-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial PLC analog inputs requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4132CMFX-2.5 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 IC design and automotive-grade qualification.
The LM4132 family was engineered to deliver laser-trimmed performance in cost-effective CMOS processes for high-accuracy data acquisition, battery-powered instrumentation, and safety-critical automotive subsystems.
FAQ
What is the minimum input voltage required for LM4132CMFX-2.5 to maintain regulation?
The LM4132CMFX-2.5 requires VIN ≥ VREF + 400 mV, i.e., ≥2.9 V, to sustain regulation at full load. At 10 mA load, the typical dropout is 175 mV, meaning 2.675 V input suffices - but 2.9 V is the guaranteed minimum across temperature and process variation per datasheet Section 6.3.
Does LM4132CMFX-2.5 require an output capacitor for stability?
No - the LM4132CMFX-2.5 is internally compensated and stable with or without an output capacitor. A 0.1 µF ceramic COUT may be added to reduce high-frequency noise, but it is optional per datasheet Figure 26 and Section 8.2.
What grade does the 'C' in LM4132CMFX-2.5 indicate?
The 'C' denotes the C-grade variant: ±0.2% initial accuracy and 20 ppm/°C temperature coefficient over –40°C to +125°C. This differs from the A-grade (±0.05%, 10 ppm/°C) and is confirmed in Table 6.7 of the SNVS372G datasheet.
Can LM4132CMFX-2.5 drive a 20 kΩ load directly?
Yes - with a 2.5 V output and maximum 20 mA output current, the LM4132CMFX-2.5 can drive loads down to 125 Ω (2.5 V / 20 mA). A 20 kΩ load draws only 125 µA, well within specification and causing negligible error (<0.003 mV) due to its 25 ppm/mA load regulation.
Is LM4132CMFX-2.5 qualified for automotive use?
Yes - the LM4132CMFX-2.5 is part of the LM4132-Q1 family and qualified to AEC-Q100 Grade 1 (–40°C to +125°C ambient), with HBM ESD rating of ±2 kV, as stated in Section 1 of the SNVS372G datasheet.
LM4132CMFX-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4132CMFX-2.5 FAQ
1.How can I place an order for LM4132CMFX-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132CMFX-2.5 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 LM4132CMFX-2.5 reliable?
The price and inventory of LM4132CMFX-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132CMFX-2.5 is usually 5 days.
3.What payment methods are accepted for LM4132CMFX-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132CMFX-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132CMFX-2.5?
LM4132CMFX-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132CMFX-2.5 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 LM4132CMFX-2.5?
For technical support, including LM4132CMFX-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132CMFX-2.5 requirements.
6.How does Aetrix verify that LM4132CMFX-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4132CMFX-2.5 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 LM4132CMFX-2.5 meets industry standards.
7.What is the process for return or replacement of LM4132CMFX-2.5?
All LM4132CMFX-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132CMFX-2.5, 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 LM4132CMFX-2.5 part is unused and in its original packaging.
Return procedure for LM4132CMFX-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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