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Texas Instruments LM4132AMFX-2.0
- Part No.:
- LM4132AMFX-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132AMFX-2.0.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,727
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Product details
Overview
LM4132AMFX-2.0 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 2.048 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 current, 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-2.0 datasheet, LM4132AMFX-2.0 pinout, LM4132AMFX-2.0 application, or LM4132AMFX-2.0 equivalent, key selection criteria include initial voltage tolerance, tempco over automotive-grade temperature range (–40°C to +125°C), dropout voltage at 10 mA (175 mV typ), enable threshold compatibility with 3.3 V/5 V logic, and stability with low-ESR ceramic capacitors without requiring output buffering.
Technical Context
The LM4132AMFX-2.0 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision in cost-effective plastic packaging. Its internal topology eliminates need for external output capacitance while maintaining regulation under dynamic loads up to 20 mA.
It uses a dedicated enable input (EN) referenced to VIN to enter ultra-low-power shutdown (3 µA), with VIH = 65% VIN and VIL = 35% VIN-ensuring robust interfacing with standard digital I/O. Dropout is defined as the minimum VIN–VREF differential sustaining 0.5% output deviation, specified at 175 mV (typ) for 10 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.05% (A-grade initial accuracy; enables 12-bit DAC/ADC full-scale calibration) |
| Tempco | 10 ppm/°C (0°C to 85°C); 20 ppm/°C (–40°C to +125°C) - ensures <±25 ppm drift across automotive ambient range |
| Quiescent Current | 60 µA (typ) - supports >1-year battery life in always-on sensor nodes drawing <100 µA total |
| Dropout Voltage | 175 mV (typ) at 10 mA - allows operation from 2.223 V input, critical for single-cell Li-ion or coin-cell systems |
| Enable Threshold | VIL ≤35% VIN, VIH ≥65% VIN - compatible with 1.8 V, 3.3 V, and 5 V microcontroller GPIO without level-shifting |
| Output Noise | 190 µVPP (0.1 Hz to 10 Hz) - meets noise floor requirements for 16-bit SAR ADC reference inputs |
| Long-Term Stability | 50 ppm (1000 hrs) - supports calibration intervals exceeding 6 months in field-deployed test equipment |
Pinout & Package
LM4132AMFX-2.0 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, with pin 1 (N/C) unconnected and left floating per datasheet specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N/C) | No-connect | Internally unconnected; must remain floating-no PCB trace or pad required |
| 2 (GND) | Ground reference | Primary return path for reference output and supply current; requires low-impedance connection to system ground plane |
| 3 (EN) | Enable control input | Active-high logic input; drives device into 3 µA shutdown when pulled low below 35% VIN |
| 4 (VIN) | Input supply | Accepts 2.448 V to 5.5 V; supplies internal regulator and enables dropout operation down to VIN – VREF = 175 mV |
| 5 (VREF) | Precision output | 2.048 V reference source; capable of sourcing/sinking ±20 mA while maintaining regulation and noise performance |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed CMOS bandgap | Eliminates post-assembly accuracy shift-enables 0.05% initial tolerance without laser trimming |
| Enable-controlled shutdown | Reduces supply current from 60 µA to 3 µA, extending battery runtime by >95% during idle periods |
| No-output-capacitor operation | Stable with 0 µF COUT-reduces BOM count and PCB area vs. shunt references requiring 1–10 µF |
| Low-ESR ceramic capacitor support | Compatible with 0.1 µF X7R/X5R MLCCs-avoids costly tantalum or electrolytic alternatives |
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +125°C ambient operation-validates use in engine control, ADAS, and powertrain modules |
Applications
| Portable Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered handheld multimeter acquiring 16-bit voltage readings with <±0.1% total error budget. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC front-end, providing stable 2.048 V scale against varying battery voltage (2.8–4.2 V). Use Value: 10 ppm/°C tempco and 190 µVPP low-frequency noise ensure measurement repeatability across temperature and time without recalibration. | Use Scenario: Pressure sensor module in exhaust gas recirculation (EGR) valve, operating continuously at 125°C ambient. IC Role / Device Role / Timing Role: Precision bias source for op-amp signal conditioning chain feeding CAN FD transceiver analog input. Use Value: AEC-Q100 Grade 1 rating and 20 ppm/°C tempco over –40°C to +125°C guarantee stable offset compensation under thermal cycling stress. |
| Industrial PLC Analog Input Module | Medical Patient Monitor Front-End |
Use Scenario: 8-channel 24-bit delta-sigma ADC module in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Shared reference for all channels, enabling ratiometric measurements and eliminating channel-to-channel gain mismatch. Use Value: 50 ppm long-term stability over 1000 hours reduces annual calibration frequency and maintenance downtime. | Use Scenario: ECG amplifier stage in portable patient monitor requiring FDA-compliant signal integrity and low power. IC Role / Device Role / Timing Role: Reference for instrumentation amplifier and anti-alias filter, directly tied to ADC reference input. Use Value: 60 µA quiescent current and enable pin allow sleep-mode power reduction to <5 µA during non-acquisition periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3020AIDBZR | Fixed 2.048 V output, 50 ppm/°C max tempco (–40°C to +125°C), 50 µA IQ, no enable pin | Lacks shutdown control; requires external logic for power gating; lower accuracy grade than LM4132A | Select when enable functionality is unnecessary and tempco tolerance >10 ppm/°C is acceptable |
| ADR3420ARJZ-R7 | 2.048 V output, 10 ppm/°C max tempco, 120 µA IQ, no enable, SOT-23-5 pinout identical | Higher quiescent current limits battery life; no shutdown mode; same footprint but different EN pin assignment (pin 3 used for GND) | Select when TI supply chain constraints exist and higher IQ is tolerable for mains-powered systems |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, LM4132AMFX-2.0 uniquely combines A-grade 0.05% accuracy, 10 ppm/°C tempco, enable-controlled 3 µA shutdown, and automotive qualification-making it optimal for space-constrained, battery-aware, and safety-critical designs where precision and power control are co-prioritized.
Availability
LM4132AMFX-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, industrial PLC analog inputs, and medical monitoring devices requiring stable component supply with guaranteed long-term availability and traceable lot control.
Supply support for LM4132AMFX-2.0 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in precision analog ICs and automotive-qualified components.
The LM4132 family was designed for high-accuracy, low-power, and space-constrained applications-including battery-operated test equipment, automotive sensors, and industrial data acquisition-where traditional laser-trimmed references were cost-prohibitive.
FAQ
What is the maximum load current supported by LM4132AMFX-2.0?
The LM4132AMFX-2.0 supports up to 20 mA of continuous output current while maintaining output voltage regulation within specifications. This capability eliminates the need for external buffer amplifiers in most precision applications, including driving ADC reference inputs and op-amp bias networks. The device remains stable under dynamic load steps up to 20 mA without requiring an output capacitor.
Does LM4132AMFX-2.0 require an output capacitor for stability?
No, LM4132AMFX-2.0 is internally compensated and stable without an output capacitor. It is specifically characterized to operate reliably with 0 µF COUT, though a 0.1 µF low-ESR ceramic capacitor may be added to further reduce high-frequency noise. This simplifies layout and reduces BOM cost compared to references mandating 1–10 µF output capacitance.
What is the dropout voltage specification for LM4132AMFX-2.0 at 10 mA load?
The dropout voltage for LM4132AMFX-2.0 is 175 mV (typical) at 10 mA load, defined as the minimum VIN–VREF differential needed to maintain output voltage within 0.5% of nominal. At worst-case conditions (–40°C to +125°C), dropout is guaranteed ≤400 mV-enabling operation from as low as 2.448 V input in high-temperature environments.
Is LM4132AMFX-2.0 qualified for automotive applications?
Yes, LM4132AMFX-2.0 is AEC-Q100 Grade 1 qualified for automotive use, with full characterization across –40°C to +125°C ambient temperature. It meets HBM ESD Class 2 (±2000 V) and is suitable for engine bay, cabin, and ADAS subsystems where precision voltage referencing is required under harsh thermal and electrical conditions.
How does the enable pin (EN) function on LM4132AMFX-2.0?
The EN pin on LM4132AMFX-2.0 is an active-high input referenced to VIN. When pulled to ≥65% VIN, the device operates normally; when pulled to ≤35% VIN, it enters shutdown mode drawing only 3 µA (typ). This rail-referenced threshold eliminates need for external level-shifters when interfacing with 1.8 V, 3.3 V, or 5 V controllers.
LM4132AMFX-2.0 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 190µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.448V ~ 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-2.0 FAQ
1.How can I place an order for LM4132AMFX-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132AMFX-2.0 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-2.0 reliable?
The price and inventory of LM4132AMFX-2.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132AMFX-2.0 is usually 5 days.
3.What payment methods are accepted for LM4132AMFX-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132AMFX-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132AMFX-2.0?
LM4132AMFX-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132AMFX-2.0 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-2.0?
For technical support, including LM4132AMFX-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132AMFX-2.0 requirements.
6.How does Aetrix verify that LM4132AMFX-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4132AMFX-2.0 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-2.0 meets industry standards.
7.What is the process for return or replacement of LM4132AMFX-2.0?
All LM4132AMFX-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132AMFX-2.0, 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-2.0 part is unused and in its original packaging.
Return procedure for LM4132AMFX-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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