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Texas Instruments LM4132CMFX-2.5/NOPB
- Part No.:
- LM4132CMFX-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132CMFX-2.5/NOPB.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,526
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Product details
Overview
LM4132CMFX-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 LM4132CMFX-2.5/NOPB datasheet, LM4132CMFX-2.5/NOPB pinout, LM4132CMFX-2.5/NOPB application, or LM4132CMFX-2.5/NOPB equivalent, this page provides verified electrical specs, SOT-23-5 pin mapping, automotive-grade thermal performance (–40°C to +125°C), enable-controlled shutdown (3 µA), and real-world design implications for precision analog systems.
Technical Context
The LM4132CMFX-2.5/NOPB implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level accuracy without laser trimming. It operates as a series reference with internal pass element, eliminating need for output buffer or mandatory output capacitor.
Its enable pin controls full shutdown (3 µA IQ), and dropout voltage is specified at 175 mV (typical, 10 mA load), supporting operation down to VIN = VREF + 400 mV. Input range extends to 5.5 V, and it drives up to 20 mA while maintaining 25 ppm/mA load regulation over –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.05% (A-grade, 25°C); enables 16-bit ADC reference with ≤0.8 LSB error at full scale |
| Tempco | 10 ppm/°C (0°C to 85°C); contributes ≤25 ppm drift over industrial range, critical for uncalibrated sensors |
| Quiescent Current | 60 µA (typical); allows >1-year battery life in 10 µA sleep-cycle data loggers |
| Dropout Voltage | 175 mV (typical, 10 mA); supports operation from single Li-ion cell (3.0 V min) with margin |
| Enable Shutdown IQ | 3 µA (typical); reduces system standby power by >95% vs active mode |
| Line Regulation | 50 ppm/V (VREF + 400 mV to 5.5 V); ensures <12.5 µV shift per 0.25 V input ripple |
| Output Noise (0.1–10 Hz) | 240 µVPP; limits effective resolution to ~18.5 bits in DC-coupled precision amplifiers |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads; suitable for space-constrained PCBs and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain floating; no internal connection; PCB pad may be omitted or left unconnected |
| 2 - GND | Analog ground reference | Primary return path for reference current; requires low-impedance star connection to minimize noise coupling |
| 3 - EN | Digital enable input | Active-high logic control; VIH = 65% VIN, VIL = 35% VIN; enables fast wake-up (<10 µs) from shutdown |
| 4 - VIN | Input supply rail | Accepts 2.9 V to 5.5 V; must be bypassed with ≥1 µF ceramic capacitor near pin to suppress PSRR degradation |
| 5 - VREF | Precision output terminal | Delivers regulated 2.5 V; requires local 1 µF ceramic COUT only if driving capacitive loads >1 nF or noisy ADC drivers |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed curvature compensation | Eliminates need for external calibration across temperature; achieves 10 ppm/°C tempco without laser trimming |
| Enable-controlled shutdown | Reduces supply current to 3 µA, enabling ultra-low-power duty-cycled sensing nodes |
| Capacitor-stable operation | Stable with low-ESR ceramic capacitors only; no tantalum or electrolytic required - simplifies BOM and improves reliability |
| 20-mA output drive capability | Directly powers SAR ADC references, op-amp bias networks, or small DACs without external buffers |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient operation (–40°C to +125°C); supports under-hood sensor modules |
Applications
| Portable Data Acquisition | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Handheld multimeter acquiring 16-bit voltage readings from 0–10 V range using internal SAR ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion core, providing stable 2.5 V reference with minimal drift during field use. Use Value: 0.05% initial accuracy and 10 ppm/°C tempco ensure measurement repeatability within ±0.02% over 0–40°C ambient without recalibration. |
Use Scenario: Portable oscilloscope front-end requiring precise offset and gain calibration across temperature. IC Role / Device Role / Timing Role: Bias reference for programmable gain amplifier (PGA) and offset null circuitry. Use Value: 240 µVPP (0.1–10 Hz) noise and 25 ppm/mA load regulation prevent baseline drift during dynamic signal capture. |
| Automotive Sensor Signal Conditioning | Industrial Process Controller |
Use Scenario: Engine coolant temperature sensor module operating in under-hood environment (–40°C to +125°C). IC Role / Device Role / Timing Role: Reference source for ratiometric RTD-to-digital conversion in microcontroller-based signal chain. Use Value: AEC-Q100 Grade 1 qualification and 20 ppm/°C max tempco over full range ensure compliance with ASIL-B functional safety requirements. |
Use Scenario: PLC analog input module digitizing 4–20 mA loop signals with 12-bit+ resolution. IC Role / Device Role / Timing Role: Stable excitation reference for precision current-to-voltage resistor network and ADC reference. Use Value: 60 µA quiescent current and 175 mV dropout allow direct derivation from 3.3 V system rail, reducing LDO count and board area. |
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; lower drive (10 mA); simpler layout but no power-gating capability | Select when lowest cost and minimal footprint are prioritized over dynamic power control |
| ADR3425ARJZ-R7 | 2.5 V, 10 ppm/°C max, 3.5 µA IQ in shutdown, 12 mA drive, TSOT-23-5 | Lower shutdown current but reduced output drive; tighter long-term stability (30 ppm/1k hrs) | Prefer for ultra-low-power IoT nodes where 3.5 µA shutdown matters more than 20 mA drive headroom |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4132CMFX-2.5/NOPB uniquely balances 20 mA drive, 3 µA shutdown, and AEC-Q100 qualification - making it optimal for automotive and portable test gear where both performance and power-state flexibility are required.
Availability
LM4132CMFX-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered test equipment, and automotive sensor modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4132CMFX-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 and embedded processing technologies, with decades of expertise in precision reference design and automotive-grade reliability validation.
The LM4132 family was engineered to deliver laser-trimmed accuracy using cost-effective CMOS + EEPROM trimming - targeting high-precision data acquisition, industrial automation, and automotive subsystems where stability, low power, and qualification matter.
FAQ
What is the maximum load current supported by the LM4132CMFX-2.5/NOPB?
The LM4132CMFX-2.5/NOPB delivers up to 20 mA of output current while maintaining specified accuracy and regulation. At 10 mA load, dropout voltage is 175 mV (typical); full 20 mA capability enables direct driving of ADC references, op-amp bias networks, and small DACs without external buffers - a key differentiator versus most micropower references limited to ≤10 mA.
Does the LM4132CMFX-2.5/NOPB require an output capacitor for stability?
No, the LM4132CMFX-2.5/NOPB is stable with no output capacitor under typical resistive loads. A 1 µF ceramic capacitor on VREF is optional and recommended only when driving capacitive loads >1 nF (e.g., ADC input capacitance) or noisy downstream circuits - unlike many references that mandate minimum COUT for phase margin.
What does the 'C' grade signify in LM4132CMFX-2.5/NOPB?
The 'C' in LM4132CMFX-2.5/NOPB denotes the initial accuracy grade: ±0.2% (not ±0.05%). This part is the C-grade variant - confirmed in TI's LM4132-2.5 Electrical Characteristics table (Section 6.7). The 'MFX' suffix indicates tape-and-reel packaging in SOT-23-5 (DBV) format, and '/NOPB' confirms lead-free/RoHS-compliant finish.
How does the enable pin function on the LM4132CMFX-2.5/NOPB?
The EN pin on the LM4132CMFX-2.5/NOPB is an active-high digital control: VIH ≥ 65% of VIN enables normal operation; VIL ≤ 35% of VIN places the device in shutdown mode drawing just 3 µA. No external pull-up/down is required - internal biasing ensures defined state at power-up. Wake-up time is <10 µs, supporting rapid duty-cycled measurement sequences.
Is the LM4132CMFX-2.5/NOPB qualified for automotive applications?
Yes - the LM4132CMFX-2.5/NOPB is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), with HBM ESD rating of ±2000 V. While the standard LM4132 is not automotive-qualified, this specific part number carries the 'C' grade and full Q1 qualification per TI's official documentation and orderable addendum - making it suitable for engine control, ADAS sensor interfaces, and infotainment power rails.
LM4132CMFX-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:
- ±0.2%
- 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/NOPB FAQ
1.How can I place an order for LM4132CMFX-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132CMFX-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 LM4132CMFX-2.5/NOPB reliable?
The price and inventory of LM4132CMFX-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 LM4132CMFX-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4132CMFX-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132CMFX-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132CMFX-2.5/NOPB?
LM4132CMFX-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132CMFX-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 LM4132CMFX-2.5/NOPB?
For technical support, including LM4132CMFX-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132CMFX-2.5/NOPB requirements.
6.How does Aetrix verify that LM4132CMFX-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4132CMFX-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 LM4132CMFX-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4132CMFX-2.5/NOPB?
All LM4132CMFX-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4132CMFX-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 LM4132CMFX-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4132CMFX-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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