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Texas Instruments LM4132AMFX-3.0
- Part No.:
- LM4132AMFX-3.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132AMFX-3.0.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,262
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Product details
Overview
LM4132AMFX-3.0 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 3.0 V output with 0.05% initial accuracy, 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current. It operates from VIN = VREF + 400 mV to 5.5 V, supports up to 20 mA load, and features an enable pin for 3 µA shutdown mode-ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4132AMFX-3.0 datasheet, LM4132AMFX-3.0 pinout, LM4132AMFX-3.0 application, or LM4132AMFX-3.0 equivalent, key selection criteria include its A-grade accuracy, SOT-23-5 package compatibility, dropout voltage ≤400 mV at 125°C, stability with ceramic capacitors, and automotive-qualified variants (LM4132-Q1) for harsh-environment designs.
Technical Context
The LM4132AMFX-3.0 uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar-level precision without laser trimming-correcting curvature, tempco, and initial accuracy at package level to overcome assembly-induced shifts. Its internal LDO regulator eliminates need for output buffer or mandatory COUT.
It implements a true series reference topology with enable-controlled shutdown, delivering 20 mA output while maintaining low 60 µA supply current and 400 mV max dropout across –40°C to +125°C. The EN pin accepts 35%–65% of VIN logic thresholds, enabling seamless integration into power-managed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±0.05% (A grade, 25°C); enables 12-bit+ ADC/DAC reference without calibration |
| Tempco | 10 ppm/°C (0°C to 85°C); ensures ≤±0.08% drift over industrial range |
| Dropout Voltage | ≤400 mV at 10 mA, –40°C to +125°C; allows operation from 3.4 V input in battery-powered systems |
| Quiescent Current | 60 µA (active), 3 µA (shutdown); extends runtime in always-on sensor nodes |
| Load Regulation | 25 ppm/mA (0–20 mA); maintains <±50 µV error under full load variation |
| Line Regulation | 70 ppm/V (VREF + 400 mV to 5.5 V); rejects supply ripple in noisy DC-DC outputs |
| Output Noise | 285 µVPP (0.1–10 Hz); suitable for precision weigh scales and medical front-ends |
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 | Internally unconnected; must be left floating per datasheet |
| 2 - GND | Ground reference | Primary return path for reference output and internal circuitry; requires low-impedance PCB connection |
| 3 - EN | Enable control input | Active-high logic: ≥65% VIN enables output; ≤35% VIN enters 3 µA shutdown |
| 4 - VIN | Input supply | Accepts 3.4 V to 5.5 V; supplies internal LDO and reference core |
| 5 - VREF | Precision output | 3.0 V regulated output; capable of sourcing 20 mA with <0.5% deviation |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based curvature correction | Compensates package-induced voltage shift post-assembly, enabling A-grade accuracy without laser trimming |
| Enable-controlled shutdown | Reduces supply current to 3 µA, enabling rapid power cycling in wake-up architectures |
| Capacitor-free stability | Operates stably with only required CIN (no mandatory COUT), simplifying layout and reducing BOM count |
| Low-noise 3.0 V output | 285 µVPP (0.1–10 Hz) supports high-resolution data acquisition without external filtering |
| Automotive qualification option | LM4132-3.0-Q1 variant meets AEC-Q100 Grade 1 (–40°C to +125°C ambient) |
Applications
| Portable Data Loggers | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered environmental sensors logging temperature, humidity, and pressure at 1-second intervals for 6+ months. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit SAR ADC, setting full-scale range and biasing signal-conditioning op-amps. Use Value: 60 µA quiescent current and 3 µA shutdown extend battery life; 10 ppm/°C tempco ensures <±0.02% measurement drift across field temperature ranges. |
Use Scenario: Modular I/O card in a DIN-rail PLC acquiring 4–20 mA loop signals with 0.1% system accuracy requirement. IC Role / Device Role / Timing Role: Precision reference for isolated ΣΔ ADC and DAC channels handling analog input/output scaling. Use Value: 0.05% initial accuracy and 25 ppm/mA load regulation eliminate per-channel calibration; SOT-23 footprint saves space on dense carrier boards. |
| Medical Patient Monitors | Automotive Battery Management Systems |
Use Scenario: ECG front-end module requiring sub-µV noise performance and long-term stability for diagnostic-grade waveform fidelity. IC Role / Device Role / Timing Role: Reference source for low-noise instrumentation amplifier gain-setting and ADC conversion. Use Value: 285 µVPP (0.1–10 Hz) noise and 50 ppm long-term stability (1000 hrs) meet IEC 60601-2-27 requirements without recalibration. |
Use Scenario: Cell voltage monitoring IC in 12S Li-ion BMS operating across –40°C to +105°C under hood conditions. IC Role / Device Role / Timing Role: Stable 3.0 V reference for multiplexed 12-bit ADC measuring individual cell voltages. Use Value: Guaranteed 400 mV dropout at 125°C junction enables use with degraded 3.6 V supply rails; AEC-Q100-qualified variants support functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0 V, 0.2% initial accuracy, 50 ppm/°C tempco, no enable pin, 50 µA IQ | Lacks shutdown mode; lower accuracy/tempco spec; SOT-23-3 package (no EN/GND separation) | Choose when cost sensitivity outweighs accuracy needs and enable control is unnecessary |
| ADR3430ARJZ-R7 | 3.0 V, 0.1% initial accuracy, 10 ppm/°C tempco, no enable pin, 120 µA IQ | Higher quiescent current; no shutdown; requires 1 µF COUT for stability | Prefer where ultra-low tempco is critical but system-level power budget permits higher IQ |
Compared with REF3030AIDBZR and ADR3430ARJZ-R7, the LM4132AMFX-3.0 uniquely combines A-grade accuracy, integrated enable, lowest dropout, and capacitor-free stability-making it optimal for space-constrained, battery-sensitive, and high-precision applications where dynamic power control and thermal stability are non-negotiable.
Availability
LM4132AMFX-3.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC analog inputs, medical patient monitors, and automotive battery management systems requiring stable component supply with guaranteed long-term availability.
Supply support for LM4132AMFX-3.0 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, embedded processing, and digital signal technologies, with decades of leadership in precision analog ICs.
The LM4132 family was designed to deliver laser-trimmed reference performance using cost-effective CMOS + EEPROM trimming-targeting high-accuracy data acquisition, test equipment, and automotive sensing applications where stability, low power, and small size are essential.
FAQ
What is the maximum input voltage for the LM4132AMFX-3.0?
The LM4132AMFX-3.0 supports a maximum input voltage of 5.5 V across its specified operating temperature range. This limit is defined in the Absolute Maximum Ratings table and applies regardless of load or ambient conditions. Exceeding 5.5 V risks permanent damage. For reliable operation, VIN should remain between VREF + 400 mV (3.4 V) and 5.5 V, with derating recommended above 85°C ambient.
Does the LM4132AMFX-3.0 require an output capacitor (COUT)?
No, the LM4132AMFX-3.0 is stable without an output capacitor and does not require COUT for basic operation. The datasheet explicitly states COUT is optional, and typical applications use only the mandatory CIN on VIN. Adding COUT may improve PSRR or transient response in specific noise-sensitive layouts but introduces no stability risk.
What is the function of Pin 1 (N/C) on the LM4132AMFX-3.0?
Pin 1 of the LM4132AMFX-3.0 is a no-connect (N/C) terminal-internally unconnected and electrically isolated. The datasheet mandates that this pin be left floating and not tied to any net, including ground or supply. Routing traces to or soldering this pin may compromise device reliability or violate qualification testing conditions.
How does the enable (EN) pin of the LM4132AMFX-3.0 behave under varying input voltages?
The LM4132AMFX-3.0 EN pin uses ratiometric thresholds: VIH ≥ 65% of VIN enables the output, and VIL ≤ 35% of VIN places the device in 3 µA shutdown. This design ensures robust enable control across the full 3.4–5.5 V input range without external level-shifting, supporting direct connection to microcontroller GPIOs powered from the same rail.
Is the LM4132AMFX-3.0 qualified for automotive applications?
The LM4132AMFX-3.0 itself is not automotive-qualified; however, the pin-compatible LM4132-3.0-Q1 variant is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient) and shares identical electrical specs except for extended temperature validation and enhanced ESD robustness. For automotive designs, LM4132-3.0-Q1 must be specified-LM4132AMFX-3.0 is intended for industrial and commercial use.
LM4132AMFX-3.0 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 285µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.4V ~ 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
LM4132AMFX-3.0 FAQ
1.How can I place an order for LM4132AMFX-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132AMFX-3.0 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 LM4132AMFX-3.0 reliable?
The price and inventory of LM4132AMFX-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132AMFX-3.0 is usually 5 days.
3.What payment methods are accepted for LM4132AMFX-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132AMFX-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132AMFX-3.0?
LM4132AMFX-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132AMFX-3.0 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 LM4132AMFX-3.0?
For technical support, including LM4132AMFX-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132AMFX-3.0 requirements.
6.How does Aetrix verify that LM4132AMFX-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4132AMFX-3.0 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 LM4132AMFX-3.0 meets industry standards.
7.What is the process for return or replacement of LM4132AMFX-3.0?
All LM4132AMFX-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132AMFX-3.0, 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 LM4132AMFX-3.0 part is unused and in its original packaging.
Return procedure for LM4132AMFX-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132AMFX-3.0 Tags
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