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Texas Instruments LM4132BMFX-2.5
- Part No.:
- LM4132BMFX-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132BMFX-2.5.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,630
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Product details
Overview
LM4132BMFX-2.5 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 2.5 V output with ±0.1% initial accuracy (B-grade), 10 ppm/°C temperature coefficient (0°C to 85°C), 60 µA quiescent current, and 20 mA output drive capability - used in high-resolution ADC/DAC biasing, portable instrumentation, and battery-powered test equipment.
For engineers reviewing the LM4132BMFX-2.5 datasheet, LM4132BMFX-2.5 pinout, LM4132BMFX-2.5 application, or LM4132BMFX-2.5 equivalent, key selection criteria include dropout voltage (175 mV at 10 mA), enable-controlled shutdown (3 µA), stability with ceramic capacitors, and SOT-23-5 package compatibility for space-constrained PCB layouts.
Technical Context
The LM4132BMFX-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 error amplifier, pass transistor, and enable-controlled bias circuitry.
Its LDO architecture supports input voltages from (VREF + 400 mV) to 5.5 V, delivers regulated 2.5 V output without requiring an output capacitor, and features rail-to-rail enable logic thresholds (35% and 65% of VIN) for robust digital control in mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.1% (B-grade, 25°C); enables accurate 12-bit+ ADC reference scaling |
| Initial Accuracy | ±0.1% (B-grade); reduces calibration burden in production test systems |
| Tempco | 10 ppm/°C (0°C to 85°C); ensures ≤25 ppm drift over industrial temperature range |
| Dropout Voltage | 175 mV at 10 mA load; allows operation from 2.675 V supply in Li-ion single-cell designs |
| Quiescent Current | 60 µA (active), 3 µA (shutdown); extends battery life in always-on sensor nodes |
| Output Drive | 20 mA sink/source; directly drives SAR ADC reference inputs and op-amp buffers |
| Noise (0.1–10 Hz) | 240 µVPP; supports <16-bit ENOB in precision data acquisition front-ends |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, 1.0 mm max height; thermally enhanced for 125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must be left floating; no internal connection or function |
| 2 - GND | Analog ground reference | Low-impedance return path for reference core; requires dedicated ground plane tie |
| 3 - EN | Enable control input | Active-high logic; transitions at 35%/65% of VIN; controls 3 µA shutdown mode |
| 4 - VIN | Input supply | Accepts 2.9 V to 5.5 V; must be decoupled with ≥1 µF ceramic capacitor |
| 5 - VREF | Precision output | 2.5 V regulated output; stable with 0.1 µF ceramic COUT (optional but recommended) |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed curvature compensation | Eliminates assembly-induced voltage shift, enabling post-package programming for grade binning |
| Enable pin with hysteresis | Prevents oscillation during slow-rising enable signals; supports clean power sequencing |
| Capacitor-stable operation | Works with low-ESR ceramic capacitors (no tantalum or electrolytic required) |
| Low thermal hysteresis | 75 ppm max; preserves calibration integrity after repeated thermal cycling (-40°C ↔ 125°C) |
| Automotive qualification option | LM4132-Q1 variant available; LM4132BMFX-2.5 is commercial-grade (–40°C to 125°C TJ) |
Applications
| Portable Data Loggers | Industrial PLC Analog Input Modules |
|---|---|
Use Scenario: Battery-powered environmental sensors logging temperature, pressure, and humidity with 16-bit ADCs. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and sensor excitation circuits. Use Value: 2.5 V output with 10 ppm/°C tempco and 240 µVPP noise maintains <1 LSB error across –20°C to 70°C operating range. |
Use Scenario: DIN-rail mounted analog input card acquiring 4–20 mA and ±10 V field signals in factory automation. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifiers and sigma-delta ADCs. Use Value: 20 mA drive capability powers external buffer op-amps; 60 µA quiescent current minimizes self-heating drift in dense PCB layouts. |
| Handheld Test Meters | Battery Management Systems |
Use Scenario: Portable multimeters performing DC voltage, resistance, and continuity measurements with auto-ranging. IC Role / Device Role / Timing Role: Stable reference for dual-slope or successive-approximation ADC front-end and display driver biasing. Use Value: ±0.1% initial accuracy eliminates per-unit calibration; 175 mV dropout enables operation from partially discharged 3.0 V coin cells. |
Use Scenario: Cell voltage monitoring in 3S–4S Li-ion packs for e-bikes and power tools. IC Role / Device Role / Timing Role: Reference for high-side current sense amplifiers and cell-balancing controller ADCs. Use Value: Enable pin synchronizes reference activation with MCU wake-up, reducing system standby current to <5 µA. |
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, ±0.2% initial accuracy, 50 ppm/°C tempco, 50 µA IQ, SOT-23-3 | No enable pin; lower drive (25 mA), higher noise (35 µVRMS), no shutdown mode | Choose when enable control and ultra-low tempco are not required; simpler layout (3-pin) |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% accuracy, 10 ppm/°C tempco, 120 µA IQ, 15 mA drive, SOT-23-5 | Higher quiescent current; no enable pin; requires 1 µF output capacitor for stability | Choose when ADR34xx family ecosystem is standardized; avoid if shutdown current <5 µA is mandatory |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4132BMFX-2.5 uniquely combines B-grade accuracy, enable-controlled shutdown, capacitor-free stability, and industry-leading tempco - making it optimal for battery-critical, high-precision, and thermally demanding applications where reference activation timing and long-term drift matter.
Availability
LM4132BMFX-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and battery-powered test equipment requiring stable component supply and guaranteed long-term sourcing.
Supply support for LM4132BMFX-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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade components.
The LM4132 family was designed for high-accuracy, low-power, space-constrained applications including portable test gear, medical sensors, and automotive subsystems - prioritizing post-assembly calibration resilience and wide-temperature reliability.
FAQ
What is the maximum input voltage for the LM4132BMFX-2.5?
The LM4132BMFX-2.5 supports a maximum input voltage of 5.5 V across its specified operating temperature range. Exceeding this limit risks permanent damage, as defined in the Absolute Maximum Ratings table. The device also requires a minimum input of VREF + 400 mV (i.e., ≥2.9 V) to maintain regulation at full load.
Does the LM4132BMFX-2.5 require an output capacitor to remain stable?
No, the LM4132BMFX-2.5 is internally compensated and stable without an output capacitor. However, a 0.1 µF ceramic capacitor at the VREF pin is recommended to reduce high-frequency noise and improve transient response - especially in noisy environments or when driving capacitive loads.
What does the 'B' in LM4132BMFX-2.5 indicate?
The 'B' denotes the initial output voltage accuracy grade: ±0.1% at 25°C. This grade sits between the tighter A-grade (±0.05%) and looser C-grade (±0.2%), offering a balance of precision and cost for industrial and portable instrumentation applications where moderate calibration tolerance is acceptable.
Can the LM4132BMFX-2.5 be used in automotive applications?
The LM4132BMFX-2.5 is the commercial-grade version, rated for –40°C to 125°C junction temperature but not AEC-Q100 qualified. For automotive use, TI offers the LM4132-Q1 series (e.g., LM4132BQMF-2.5), which undergoes full AEC-Q100 Grade 1 stress testing and includes automotive-specific documentation and traceability.
How does the enable pin function on the LM4132BMFX-2.5?
The EN pin is active-high with built-in hysteresis: the device turns on when EN rises above 65% of VIN and shuts down when EN falls below 35% of VIN. In shutdown, supply current drops to 3 µA typical, and VREF enters high-impedance state - enabling precise power gating in multi-rail systems using the LM4132BMFX-2.5.
LM4132BMFX-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:
- ±0.1%
- 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
LM4132BMFX-2.5 FAQ
1.How can I place an order for LM4132BMFX-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132BMFX-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 LM4132BMFX-2.5 reliable?
The price and inventory of LM4132BMFX-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 LM4132BMFX-2.5 is usually 5 days.
3.What payment methods are accepted for LM4132BMFX-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132BMFX-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132BMFX-2.5?
LM4132BMFX-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132BMFX-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 LM4132BMFX-2.5?
For technical support, including LM4132BMFX-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132BMFX-2.5 requirements.
6.How does Aetrix verify that LM4132BMFX-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4132BMFX-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 LM4132BMFX-2.5 meets industry standards.
7.What is the process for return or replacement of LM4132BMFX-2.5?
All LM4132BMFX-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132BMFX-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 LM4132BMFX-2.5 part is unused and in its original packaging.
Return procedure for LM4132BMFX-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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