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Texas Instruments LM4132DMFX-2.0
- Part No.:
- LM4132DMFX-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132DMFX-2.0.pdf
- Description:
- IC VREF SERIES 0.4% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,097
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Product details
Overview
LM4132DMFX-2.0 from Texas Instruments is a precision low-dropout 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 features an enable pin for 3 µA shutdown mode, supports up to 20 mA load current, and operates from VIN = VREF + 400 mV to 5.5 V - ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4132DMFX-2.0 datasheet, LM4132DMFX-2.0 pinout, LM4132DMFX-2.0 application, or LM4132DMFX-2.0 equivalent, key selection criteria include dropout voltage at 10 mA (175 mV), 0.1–10 Hz noise (190 µVPP), thermal hysteresis (75 ppm), long-term stability (50 ppm over 1000 hrs), and SOT-23-5 package compatibility with low-ESR ceramic capacitors.
Technical Context
The LM4132DMFX-2.0 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision without laser trimming. Its internal LDO regulator delivers regulated 2.048 V output independent of input ripple, with line regulation of 30 ppm/V and load regulation of 25 ppm/mA (0–20 mA).
It uses a dedicated enable input (pin 3) with VIH = 65% VIN and VIL = 35% VIN, supporting seamless power sequencing. The no-connect pin (pin 1) must remain floating, and CIN is mandatory while COUT is optional - eliminating need for external buffer amplifiers in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.05% - matches common 12-bit DAC/ADC full-scale reference points with minimal calibration overhead |
| Initial Accuracy | ±0.05% (Grade A) - enables single-point calibration in precision measurement systems |
| Tempco | 10 ppm/°C (0°C to 85°C) - ensures ≤0.85 mV drift across industrial temperature range |
| Dropout Voltage | 175 mV @ 10 mA - allows operation from 2.223 V supply, critical for Li-ion battery-powered devices |
| Quiescent Current | 60 µA - supports >1-year battery life in always-on sensor nodes at 20 µA system sleep current |
| Shutdown Current | 3 µA - reduces standby power by 95% vs active mode for duty-cycled applications |
| Output Noise | 190 µVPP (0.1–10 Hz) - avoids quantization error in 16-bit+ data acquisition systems |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm), surface-mount, RoHS-compliant. Pin 1 is no-connect and must be left floating; pin 2 is ground; pin 3 is enable input; pin 4 is input supply; pin 5 is reference output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect | Internally unconnected - must remain unattached on PCB to avoid parasitic coupling |
| 2 (GND) | Ground reference | Low-impedance return path for reference and enable circuits; requires solid thermal pad connection |
| 3 (EN) | Enable control input | Active-high logic interface; drives internal pass device - enables fast wake-up (<10 µs) from shutdown |
| 4 (VIN) | Input supply | Accepts 2.448 V to 5.5 V; minimum headroom defined by dropout spec - not rail-to-rail |
| 5 (VREF) | Precision output | Low-noise, low-impedance 2.048 V source; stable without output capacitor but benefits from 1 µF ceramic for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed tempco & curvature | Eliminates post-assembly calibration drift - achieves 10 ppm/°C over 0°C–85°C without external compensation |
| Enable-controlled shutdown | Reduces supply current from 60 µA to 3 µA - extends battery life in intermittent-sampling systems |
| Stable with low-ESR ceramics | Operates reliably with 0.1 µF–10 µF X7R/X5R capacitors - removes need for tantalum or electrolytic output caps |
| 20 mA output drive capability | Directly powers SAR ADC reference inputs and op-amp bias networks - avoids external buffers |
| Automotive-grade option (Q1) | LM4132-Q1 variant qualified to AEC-Q100 Grade 1 (–40°C to +125°C) - suitable for engine control and ADAS sensors |
Applications
| Portable Data Loggers | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 1-sample-per-minute intervals. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for 16-bit sigma-delta ADC, enabling ±0.01% measurement accuracy over –20°C to 60°C. Use Value: 3 µA shutdown current extends CR2032 battery life from 3 months to >2 years; 190 µVPP noise prevents LSB toggling in high-resolution conversion. | Use Scenario: Modular analog input card in a DIN-rail mounted PLC acquiring 4–20 mA loop signals with 14-bit resolution. IC Role / Device Role / Timing Role: Supplies precision reference to dual-slope integrator and multiplexed ADC front-end, rejecting supply ripple from shared 24 V DC bus. Use Value: 30 ppm/V line regulation maintains accuracy despite ±10% bus variation; 20 mA drive supports simultaneous excitation of multiple RTD bridges. |
| Medical Patient Monitors | Automotive Battery Management |
Use Scenario: ECG front-end module digitizing biopotential signals with 5 µV resolution and DC-coupled baseline stability. IC Role / Device Role / Timing Role: Reference source for instrumentation amplifier gain-setting and ADC conversion - directly impacts common-mode rejection and offset drift. Use Value: 75 ppm thermal hysteresis ensures repeatable calibration after patient-warmup cycles; 50 ppm long-term stability meets IEC 60601-1 2-year verification requirements. | Use Scenario: Cell voltage monitoring IC in 12S lithium-ion pack, measuring individual 3.6 V cells with ±1 mV accuracy across –40°C to 85°C. IC Role / Device Role / Timing Role: Precision reference for 12-bit SAR ADC sampling cell dividers - defines absolute voltage measurement traceability. Use Value: 10 ppm/°C tempco limits cell reading error to <0.5 mV over operating range; AEC-Q100 qualification ensures reliability in under-hood environments. |
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, 50 ppm/°C max tempco (–40°C to 125°C), 50 µA IQ, no enable pin | Lacks shutdown control; lower drive (10 mA); requires external bypass cap for stability | Select when ultra-low quiescent current dominates over enable functionality and load drive |
| ADR3420ARJZ-R7 | 2.048 V, 10 ppm/°C (–40°C to +125°C), 120 µA IQ, no enable, higher noise (300 µVPP) | Better wide-tempco spec but higher noise and no power gating - unsuitable for battery-cycled systems | Choose for extended temperature operation where shutdown is unnecessary and noise is less critical |
Compared with REF3020AIDBZR and ADR3420ARJZ-R7, the LM4132DMFX-2.0 uniquely combines Grade-A accuracy, enable-controlled shutdown, 20 mA drive, and low 0.1–10 Hz noise - making it optimal for portable, high-precision, and intermittently powered measurement systems.
Availability
LM4132DMFX-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC analog inputs, medical patient monitors, and automotive battery management requiring stable component supply and long-term parametric consistency.
Supply support for LM4132DMFX-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 headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and personal electronics markets.
The LM4132 family was developed to deliver laser-trimmed reference performance using cost-effective CMOS EEPROM trimming - targeting high-accuracy data acquisition, test equipment, and battery-powered precision systems.
FAQ
What is the maximum load current supported by the LM4132DMFX-2.0?
The LM4132DMFX-2.0 supports up to 20 mA of continuous output current while maintaining specified accuracy and regulation. This is confirmed in Section 6.3 (Recommended Operating Conditions) and electrical characteristics tables for LM4132-2.0 across all grades. Exceeding 20 mA may cause output voltage deviation beyond the 0.5% dropout threshold or thermal derating.
Does the LM4132DMFX-2.0 require an output capacitor for stability?
No, the LM4132DMFX-2.0 is internally compensated and stable without an output capacitor. The datasheet explicitly states COUT is optional, and the device remains stable with low-ESR ceramic capacitors from 0.1 µF to 10 µF if added for transient immunity. This eliminates risk of oscillation seen in some references requiring precise ESR ranges.
What is the function of Pin 1 (NC) on the LM4132DMFX-2.0?
Pin 1 of the LM4132DMFX-2.0 is a no-connect terminal - it is not bonded internally and must be left floating on the PCB. Connecting Pin 1 to any net (including ground or supply) may introduce leakage paths or parasitic coupling that degrades reference accuracy or noise performance, as specified in the Pin Functions table (Section 5).
How does the enable pin (EN) of the LM4132DMFX-2.0 operate?
The enable pin (Pin 3) of the LM4132DMFX-2.0 is an active-high digital control input. It asserts when voltage exceeds 65% of VIN and deasserts below 35% of VIN, placing the device in 3 µA shutdown mode. This behavior is characterized across –40°C to 125°C and enables precise power sequencing in multi-rail systems without external logic.
Is the LM4132DMFX-2.0 qualified for automotive applications?
The LM4132DMFX-2.0 is not the automotive-qualified variant; it is the commercial-grade part. For automotive use, TI offers the LM4132-Q1 series (e.g., LM4132QDBVR20), which is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient) and undergoes additional stress testing. The LM4132DMFX-2.0 is rated for –40°C to +125°C junction temperature but lacks automotive-specific qualification documentation.
LM4132DMFX-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:
- ±0.4%
- 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
LM4132DMFX-2.0 FAQ
1.How can I place an order for LM4132DMFX-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132DMFX-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 LM4132DMFX-2.0 reliable?
The price and inventory of LM4132DMFX-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 LM4132DMFX-2.0 is usually 5 days.
3.What payment methods are accepted for LM4132DMFX-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132DMFX-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132DMFX-2.0?
LM4132DMFX-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132DMFX-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 LM4132DMFX-2.0?
For technical support, including LM4132DMFX-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132DMFX-2.0 requirements.
6.How does Aetrix verify that LM4132DMFX-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4132DMFX-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 LM4132DMFX-2.0 meets industry standards.
7.What is the process for return or replacement of LM4132DMFX-2.0?
All LM4132DMFX-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132DMFX-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 LM4132DMFX-2.0 part is unused and in its original packaging.
Return procedure for LM4132DMFX-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132DMFX-2.0 Tags
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