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Texas Instruments LM4132AMFX-3.3/NOPB
- Part No.:
- LM4132AMFX-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132AMFX-3.3/NOPB.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,837
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Product details
Overview
LM4132AMFX-3.3/NOPB from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 3.3 V output with 0.05% initial accuracy, 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 LM4132AMFX-3.3/NOPB datasheet, LM4132AMFX-3.3/NOPB pinout, LM4132AMFX-3.3/NOPB application, or LM4132AMFX-3.3/NOPB 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 compatibility with ceramic capacitors only.
Technical Context
The LM4132AMFX-3.3/NOPB 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.
Unlike shunt references, it draws only 60 µA under load and supports up to 20 mA output while maintaining 0.5% output accuracy down to a 175 mV input–output differential - making it suitable for battery-powered systems where supply headroom is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±0.05% (A-grade initial accuracy at 25°C) |
| Tempco | 10 ppm/°C (0°C to 85°C); enables <±0.83 mV drift over industrial range |
| Dropout Voltage | 175 mV at 10 mA load; allows operation from 3.475 V input in 3.3 V systems |
| Quiescent Current | 60 µA typical; reduces power loss in always-on precision monitoring circuits |
| Shutdown Current | 3 µA with EN = 0 V; enables ultra-low-power sleep modes in portable devices |
| Load Regulation | 25 ppm/mA (0–20 mA); ensures <±0.083 mV output shift across full load range |
| Noise (0.1–10 Hz) | 310 µVPP; supports 16-bit+ data acquisition 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, lead-free, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect | Internally unconnected; must remain floating per datasheet |
| 2 - GND | Ground reference | Primary return path for reference output and internal bias; requires low-impedance PCB connection |
| 3 - EN | Enable control input | Active-high logic: VIH ≥65% VIN enables output; VIL ≤35% VIN disables output |
| 4 - VIN | Input supply | Accepts 3.7 V to 5.5 V (VREF + 400 mV min); powers internal regulator and output stage |
| 5 - VREF | Precision output | 3.3 V reference source; capable of sourcing up to 20 mA with <0.5% error |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed curvature compensation | Eliminates assembly-induced voltage shift in plastic SOT-23 packaging, achieving laser-trimmed accuracy at CMOS cost |
| Enable pin with hysteresis | Prevents oscillation during slow-rising enable signals; tVIL/tVIH thresholds ensure clean turn-on/turn-off transitions |
| Capacitor-free stability | Stable with low-ESR ceramic capacitors only; no output capacitor required, reducing BOM count and board area |
| Low-noise 0.1–10 Hz output | 310 µVPP noise enables direct use in high-resolution SAR and delta-sigma ADC reference paths |
| Automotive qualification option | LM4132-Q1 variant available (AEC-Q100 Grade 1, –40°C to +125°C), though LM4132AMFX-3.3/NOPB is commercial-grade |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure with 16-bit ADCs over multi-year deployments. IC Role / Device Role / Timing Role: Provides stable 3.3 V reference for ADC conversion and microcontroller analog peripherals. Use Value: 60 µA quiescent current and 3 µA shutdown extend battery life; 10 ppm/°C tempco maintains measurement accuracy across seasonal ambient shifts. |
Use Scenario: Occupancy detection and air quality sensing modules mounted near vehicle dashboards or HVAC ducts. IC Role / Device Role / Timing Role: Supplies precision bias voltage to MEMS pressure transducers and NTC thermistor signal chains. Use Value: 175 mV dropout enables operation from degraded 3.7 V Li-ion cells; 0.05% initial accuracy ensures calibration validity over product lifetime. |
| 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 isolated sigma-delta ADCs and digital calibration routines. Use Value: 25 ppm/mA load regulation prevents gain error when driving multiplexer-switched sensor channels; 310 µVPP noise avoids quantization floor degradation. |
Use Scenario: Portable ECG and pulse oximetry units requiring clinical-grade signal fidelity and FDA-compliant long-term stability. IC Role / Device Role / Timing Role: References front-end instrumentation amplifiers and 24-bit delta-sigma ADCs in analog signal path. Use Value: 50 ppm long-term stability (1000 hrs) meets IEC 60601-1 reliability requirements; thermal hysteresis <75 ppm ensures repeatable readings after thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3333AIDBVR | 3.3 V, 0.1% initial accuracy, 10 ppm/°C, 3.9 µA IQ, SOT-23-5 - lower IQ but looser accuracy | Preferred for ultra-low-power IoT nodes where 0.1% accuracy suffices and shutdown not required | Select REF3333AIDBVR when system-level accuracy budget allows ±3.3 mV error and continuous operation dominates power budget |
| ADR3433ARJZ-R7 | 3.3 V, 0.1% initial accuracy, 10 ppm/°C, 120 µA IQ, SOT-23-5 - higher IQ, better PSRR | Better suited for noisy switch-mode supply environments due to 70 dB PSRR at 1 kHz | Select ADR3433ARJZ-R7 when VIN derives from DC/DC converters and PSRR >60 dB is required below 10 kHz |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, the LM4132AMFX-3.3/NOPB delivers tighter 0.05% accuracy and lower dropout (175 mV vs ≥250 mV), but requires explicit enable control and offers no PSRR specification - making it optimal for accuracy-critical, low-headroom, battery-fed systems with clean input rails.
Availability
LM4132AMFX-3.3/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC analog inputs, and medical patient monitoring requiring stable component supply with guaranteed long-term availability and traceable lot history.
Supply support for LM4132AMFX-3.3/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, embedded processing, and connectivity technologies, with decades of expertise in precision analog IC design and automotive-grade qualification.
The LM4132 family was engineered to deliver laser-trimmed voltage reference performance using cost-effective CMOS + EEPROM trimming - targeting high-accuracy data acquisition, test equipment, and safety-critical sensor interfaces where stability and low drift are non-negotiable.
FAQ
What is the maximum load current supported by the LM4132AMFX-3.3/NOPB?
The LM4132AMFX-3.3/NOPB supports up to 20 mA output current while maintaining output voltage accuracy within 0.5% of nominal 3.3 V. This capability eliminates the need for external buffer amplifiers in most precision applications, including driving ADC reference inputs and multiplexed sensor signal chains.
Does the LM4132AMFX-3.3/NOPB require an output capacitor for stability?
No, the LM4132AMFX-3.3/NOPB is internally compensated and stable with low-ESR ceramic capacitors only - and does not require an output capacitor. The datasheet explicitly states COUT is optional, simplifying layout and reducing bill-of-materials count compared to many competing references.
What is the minimum input voltage required for the LM4132AMFX-3.3/NOPB to regulate properly?
The LM4132AMFX-3.3/NOPB requires a minimum input voltage of VREF + 400 mV = 3.7 V under recommended operating conditions. At 10 mA load, its dropout voltage is specified at 175 mV, meaning it can maintain regulation down to 3.475 V - enabling operation from partially discharged lithium-ion cells.
How does the enable pin function on the LM4132AMFX-3.3/NOPB?
The EN pin on the LM4132AMFX-3.3/NOPB is an active-high digital control input. When pulled ≥65% of VIN, the device enables and delivers 3.3 V output; when ≤35% of VIN, it enters shutdown mode drawing only 3 µA. Hysteresis between VIH and VIL prevents chatter during slow-rising enable signals.
Is the LM4132AMFX-3.3/NOPB qualified for automotive applications?
No - the LM4132AMFX-3.3/NOPB is the commercial-grade version. For automotive use, TI offers the LM4132-Q1 series (e.g., LM4132C33QDBVRQ1), which is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient) and undergoes additional stress testing. The /NOPB suffix confirms lead-free commercial packaging, not automotive qualification.
LM4132AMFX-3.3/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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 310µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.7V ~ 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-3.3/NOPB FAQ
1.How can I place an order for LM4132AMFX-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132AMFX-3.3/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 LM4132AMFX-3.3/NOPB reliable?
The price and inventory of LM4132AMFX-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132AMFX-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM4132AMFX-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132AMFX-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132AMFX-3.3/NOPB?
LM4132AMFX-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132AMFX-3.3/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 LM4132AMFX-3.3/NOPB?
For technical support, including LM4132AMFX-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132AMFX-3.3/NOPB requirements.
6.How does Aetrix verify that LM4132AMFX-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4132AMFX-3.3/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 LM4132AMFX-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM4132AMFX-3.3/NOPB?
All LM4132AMFX-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4132AMFX-3.3/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 LM4132AMFX-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM4132AMFX-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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