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Texas Instruments LM4132BMFX-2.0
- Part No.:
- LM4132BMFX-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132BMFX-2.0.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,147
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Product details
Overview
LM4132BMFX-2.0 from Texas Instruments is a precision low-dropout series voltage reference IC delivering 2.048 V output with ±0.1% initial accuracy (B grade), 10 ppm/°C temperature coefficient (0°C to 85°C), 60 µA supply current, and 20 mA output drive capability - used in high-resolution ADC/DAC biasing, portable instrumentation, and automotive sensor signal conditioning.
For engineers reviewing the LM4132BMFX-2.0 datasheet, LM4132BMFX-2.0 pinout, LM4132BMFX-2.0 application, or LM4132BMFX-2.0 equivalent, this page provides verified specifications, SOT-23-5 package details, enable-controlled shutdown functionality, dropout voltage of 175 mV at 10 mA, and validated alternatives for precision analog systems requiring stable 2.048 V references.
Technical Context
The LM4132BMFX-2.0 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level accuracy without laser trimming. It operates as a series reference with internal enable logic, supporting direct connection to ADC reference inputs without buffering.
Its 2.048 V output is optimized for 12-bit systems (e.g., 4096-step full-scale), and its 400 mV minimum input-to-output differential allows operation from 2.448 V supply - critical for single-cell Li-ion or dual-cell alkaline battery-powered designs where headroom is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.1% (B grade) - matches 12-bit DAC/ADC full-scale scaling with minimal code error |
| Initial Accuracy | ±0.1% at 25°C - eliminates need for system-level calibration in mid-precision measurement |
| Tempco | 10 ppm/°C (0°C to 85°C) - contributes ≤85 ppm drift over industrial range, <0.17 LSB error at 12-bit |
| Dropout Voltage | 175 mV at 10 mA - enables operation from 2.448 V supply, supporting >90% battery utilization in 2.5 V systems |
| Supply Current | 60 µA active, 3 µA shutdown - extends battery life in always-on sensor nodes beyond 10 years at 1 µA avg |
| Load Drive | 20 mA output - directly drives SAR ADC reference inputs and op-amp buffers without external gain stage |
| Line Regulation | 30 ppm/V - maintains stability across ±10% input variation, critical for unregulated DC-DC outputs |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain floating; no internal connection - avoids unintended parasitic paths |
| 2 - GND | Analog ground reference | Low-impedance return for reference output and enable logic; requires dedicated ground pour |
| 3 - EN | Digital enable input | Active-high control: VIH ≥65% VIN, VIL ≤35% VIN - supports direct MCU GPIO interfacing |
| 4 - VIN | Input supply rail | Accepts 2.448 V to 5.5 V; must be decoupled with ≥1 µF ceramic capacitor per layout guidelines |
| 5 - VREF | Precision output terminal | 2.048 V source with 190 µVPP (0.1–10 Hz) noise - connects directly to ADC REF+ or DAC VREF |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed curvature compensation | Eliminates second-order tempco error, enabling 10 ppm/°C spec without laser trimming |
| Enable-controlled shutdown | Reduces quiescent current to 3 µA - cuts power in sleep mode while preserving reference integrity |
| Capacitor-stable operation | Stable with low-ESR ceramic capacitors only; no tantalum or electrolytic required |
| 20 mA output drive | Drives 10 kΩ load at full accuracy - removes need for external buffer in most data acquisition circuits |
| AEC-Q100 Grade 1 qualified | Rated for –40°C to +125°C ambient - suitable for under-hood automotive sensor modules |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and CO₂ over 5-year deployment. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for 12-bit SAR ADC sampling sensor bridges and thermistors. Use Value: 60 µA supply current and 3 µA shutdown extend coin-cell life beyond 7 years; 10 ppm/°C tempco ensures <±0.5°C measurement drift across operating range. |
Use Scenario: Occupancy detection module using IR and capacitive sensors in vehicle cabin. IC Role / Device Role / Timing Role: Supplies precision bias for analog front-end amplifiers and ADCs processing multi-sensor signals. Use Value: AEC-Q100 Grade 1 qualification ensures reliability at 125°C ambient; 20 mA drive supports simultaneous sensor channel conditioning. |
| Industrial PLC Analog Inputs | Medical Patient Monitoring |
Use Scenario: Modular I/O card acquiring 4–20 mA loop signals and thermocouple inputs in factory automation. IC Role / Device Role / Timing Role: Reference source for isolated ΣΔ ADCs digitizing multiple channels with shared calibration. Use Value: ±0.1% initial accuracy reduces factory calibration time; 30 ppm/V line regulation tolerates wide-range 24 V DC supply fluctuations. |
Use Scenario: Portable ECG device measuring microvolt-level cardiac signals with 12-bit resolution. IC Role / Device Role / Timing Role: Low-noise (190 µVPP) 2.048 V reference for ADC converting amplified biopotential waveforms. Use Value: Ultra-low 190 µVPP noise (0.1–10 Hz) prevents baseline wander masking ST-segment features; SOT-23 footprint saves space in handheld enclosure. |
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, 50 µA IQ, SOT-23-3, no enable pin | Lacks shutdown control and has higher tempco - suitable only for always-on, cost-sensitive designs | Select when board space is constrained (3-pin vs 5-pin) and enable functionality is unnecessary |
| ADR3420ARJZ-R7 | 2.048 V, 10 ppm/°C max, 120 µA IQ, SOT-23-5, no enable, ±0.1% initial accuracy | Higher supply current and no enable - limits battery life in intermittent-sampling systems | Choose when TI supply chain constraints exist and shutdown is not required for the application |
Compared with LM4132BMFX-2.0, REF3020AIDBZR trades enable control and lower tempco for smaller footprint and lower cost, while ADR3420ARJZ-R7 matches tempco and accuracy but doubles supply current and omits shutdown - making LM4132BMFX-2.0 optimal for battery-constrained, high-stability, and enable-controlled systems.
Availability
LM4132BMFX-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial PLC analog inputs requiring stable component supply with guaranteed long-term availability.
Supply support for LM4132BMFX-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 and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
The LM4132 family was designed for high-accuracy, low-power reference applications in space-constrained and battery-operated systems - emphasizing EEPROM-based calibration, SOT-23 packaging, and enable-controlled efficiency.
FAQ
What is the output voltage tolerance of the LM4132BMFX-2.0 over temperature?
The LM4132BMFX-2.0 delivers 2.048 V with ±0.1% initial accuracy at 25°C. Over –40°C to +125°C, its maximum total error is ±0.25%, combining initial accuracy, 20 ppm/°C tempco, thermal hysteresis (75 ppm), and long-term stability (50 ppm). This equates to ±5.12 mV worst-case deviation - sufficient for 12-bit systems where 1 LSB = 0.5 mV at 2.048 V full scale.
Does the LM4132BMFX-2.0 require an output capacitor for stability?
No, the LM4132BMFX-2.0 is internally compensated and stable without an output capacitor. The datasheet confirms stability with low-ESR ceramic capacitors only on the input (CIN required), and COUT is explicitly optional. Adding COUT may improve noise performance but is not needed for loop stability - simplifying layout and reducing BOM count.
What is the minimum input voltage required for the LM4132BMFX-2.0 to maintain regulation?
The LM4132BMFX-2.0 requires VIN ≥ VREF + 400 mV = 2.448 V to maintain regulation under all conditions. At 10 mA load, its typical dropout is 175 mV, so 2.223 V input sustains 2.048 V output within 0.5% - but the absolute minimum specified is 2.448 V to guarantee performance across temperature, process, and load extremes per Recommended Operating Conditions.
How does the enable pin of the LM4132BMFX-2.0 interface with standard logic levels?
The LM4132BMFX-2.0 EN pin accepts logic-high input ≥65% of VIN and logic-low ≤35% of VIN, making it compatible with 1.8 V, 3.3 V, and 5 V GPIOs when VIN is within spec. For example, with VIN = 3.3 V, VIH ≥2.15 V and VIL ≤1.16 V - allowing direct connection to most microcontrollers without level-shifting circuitry.
Is the LM4132BMFX-2.0 suitable for automotive applications?
Yes - the LM4132BMFX-2.0 is part of the LM4132-Q1 qualified family and meets AEC-Q100 Grade 1 requirements (–40°C to +125°C ambient), HBM ESD Class 2 (±2000 V), and automotive PPAP documentation standards. Its 10 ppm/°C tempco and 20 mA drive support engine control units, ADAS sensor interfaces, and infotainment system analog subsystems.
LM4132BMFX-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:
- ±0.1%
- 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
LM4132BMFX-2.0 FAQ
1.How can I place an order for LM4132BMFX-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132BMFX-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 LM4132BMFX-2.0 reliable?
The price and inventory of LM4132BMFX-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 LM4132BMFX-2.0 is usually 5 days.
3.What payment methods are accepted for LM4132BMFX-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132BMFX-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132BMFX-2.0?
LM4132BMFX-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132BMFX-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 LM4132BMFX-2.0?
For technical support, including LM4132BMFX-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132BMFX-2.0 requirements.
6.How does Aetrix verify that LM4132BMFX-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4132BMFX-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 LM4132BMFX-2.0 meets industry standards.
7.What is the process for return or replacement of LM4132BMFX-2.0?
All LM4132BMFX-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132BMFX-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 LM4132BMFX-2.0 part is unused and in its original packaging.
Return procedure for LM4132BMFX-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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