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Texas Instruments LM4132CMFX-4.1
- Part No.:
- LM4132CMFX-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132CMFX-4.1.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,765
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Product details
Overview
LM4132CMFX-4.1 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 4.096 V output with 0.05% initial accuracy (A-grade), 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 - ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4132CMFX-4.1 datasheet, LM4132CMFX-4.1 pinout, LM4132CMFX-4.1 application, or LM4132CMFX-4.1 equivalent, key selection criteria include its SOT-23-5 package compatibility, dropout voltage of 175 mV at 10 mA, line regulation of 100 ppm/V, and automotive-grade qualification (LM4132-Q1 variant available).
Technical Context
The LM4132CMFX-4.1 uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar-level precision without laser trimming. Its curvature, tempco, and accuracy are corrected at package level to mitigate assembly-induced shifts - enabling consistent 4.096 V output across temperature and life cycle.
This device functions as a two-terminal series reference with active enable control: EN pin asserts high (>65% VIN) to activate output, low (<35% VIN) to enter 3 µA shutdown. No output capacitor is required, and it remains stable with low-ESR ceramic capacitors on input only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V ±0.05% (A-grade) - matches common 12-bit DAC/ADC full-scale reference points |
| Tempco | 10 ppm/°C (0°C to 85°C) - ensures ≤±0.85 mV drift over industrial temperature range |
| Dropout Voltage | 175 mV at 10 mA load - enables operation from 4.271 V supply, critical for single-cell Li-ion systems |
| Quiescent Current | 60 µA typical - supports >1-year battery life in always-on sensor nodes drawing <10 µA average |
| Enable Threshold | VIL ≤35% VIN, VIH ≥65% VIN - provides robust noise margin against supply ripple in noisy environments |
| Output Noise | 350 µVPP (0.1–10 Hz) - suitable for 16-bit SAR ADCs requiring <1 LSB noise at 4.096 V FS |
| Load Current | 20 mA max - drives multiple op-amp references or small logic loads without external buffering |
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 pin - must be left floating; no internal connection or function |
| 2 | GND | Analog ground reference - requires low-impedance PCB plane tie to minimize noise coupling |
| 3 | EN | Active-high digital enable - controls reference output state; high-Z when un-driven |
| 4 | VIN | Input supply - must be ≥4.271 V (4.096 V + 175 mV dropout) for full-load regulation |
| 5 | VREF | Precision 4.096 V output - directly connects to ADC REF+ or DAC VREF pins; bypass with 1 µF ceramic |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based curvature correction | Eliminates need for external trimming components and enables post-assembly calibration stability |
| Enable-controlled shutdown | Reduces system standby power by >95% - from 60 µA to 3 µA - without external FET or logic |
| No output capacitor required | Simplifies layout and reduces BOM count; avoids ESR-related instability risks in space-constrained designs |
| Stable with ceramic CIN only | Supports 0.1 µF–10 µF X7R/X5R input caps - compatible with standard MLCC footprints and aging behavior |
| AEC-Q100 Grade 1 qualified | Validated for –40°C to +125°C ambient operation - suitable for under-hood automotive sensors and ECUs |
Applications
| Portable Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered handheld multimeter acquiring 16-bit ADC samples at 1 kSPS. IC Role / Device Role / Timing Role: Primary reference for SAR ADC and analog front-end gain-setting resistors. Use Value: 4.096 V output aligns with 212 scaling; 10 ppm/°C tempco ensures <±0.5 LSB error across –10°C to 50°C operating range. |
Use Scenario: Pressure sensor module in engine control unit requiring stable bias under thermal cycling. IC Role / Device Role / Timing Role: Precision excitation reference for Wheatstone bridge and ADC reference. Use Value: AEC-Q100 Grade 1 rating and 75 ppm thermal hysteresis guarantee repeatable offset calibration after cold-start warm-up cycles. |
| Industrial PLC Analog Input Module | Medical Patient Monitor Front-End |
Use Scenario: 8-channel isolated 24-bit sigma-delta ADC system with multiplexed reference path. IC Role / Device Role / Timing Role: Shared reference source for channel calibration and ratiometric measurement. Use Value: 20 mA drive capability supports simultaneous loading of 4–5 ADC REF+ inputs; long-term stability <50 ppm/1000 hrs minimizes recalibration frequency. |
Use Scenario: ECG amplifier stage requiring ultra-low-noise, drift-free DC bias for baseline stability. IC Role / Device Role / Timing Role: Reference for programmable gain instrumentation amplifier and 24-bit ADC. Use Value: 350 µVPP (0.1–10 Hz) noise contributes <0.02% of full-scale noise floor at 4.096 V - below clinical diagnostic thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3440DRVR | 4.096 V, 0.05% initial accuracy, 6 ppm/°C tempco, 50 µA IQ, SOT-23-6 | Lower noise (12 µVPP), tighter tempco, but requires output capacitor and has different pinout | Select for ultra-low-drift systems where layout allows extra decoupling and pin reassignment |
| ADR4540BRZ | 4.096 V, 0.02% initial accuracy, 3 ppm/°C tempco, 950 µA IQ, SOIC-8 | Higher precision and stability, but 16× higher quiescent current and larger footprint | Select for lab-grade test equipment where power and size are secondary to absolute accuracy |
Compared with REF3440DRVR and ADR4540BRZ, the LM4132CMFX-4.1 offers optimal balance of ultra-low IQ (60 µA), enable control, and SOT-23-5 integration - making it preferred for space- and battery-limited embedded systems where 10 ppm/°C stability suffices.
Availability
LM4132CMFX-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, industrial PLC analog inputs, and medical patient monitor front-ends requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4132CMFX-4.1 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 over 50 years of precision analog design heritage.
The LM4132 family was engineered to deliver laser-trimmed performance using cost-effective CMOS EEPROM trimming - targeting high-accuracy, low-power, and space-constrained applications in industrial, automotive, and portable electronics.
FAQ
What is the maximum input voltage for LM4132CMFX-4.1?
The absolute maximum input voltage for LM4132CMFX-4.1 is 6 V, but the recommended operating maximum is 5.5 V per TI's Electrical Characteristics table. Exceeding 5.5 V may degrade long-term reliability or trigger overvoltage protection in adjacent circuitry. The device maintains regulation down to VIN = VREF + 400 mV (≥4.496 V) at full load.
Does LM4132CMFX-4.1 require an output capacitor?
No, LM4132CMFX-4.1 does not require an output capacitor for stability - a key differentiator from most LDO references. The datasheet explicitly states "no output capacitor required" and confirms stability with only a 0.1 µF–10 µF ceramic input capacitor (CIN). Adding COUT may improve noise but is optional and non-critical for regulation.
What grade is implied by the 'C' in LM4132CMFX-4.1?
The 'C' in LM4132CMFX-4.1 denotes the C-grade version, specifying 0.2% initial output voltage accuracy and 20 ppm/°C temperature coefficient over –40°C to +125°C. This grade balances cost and performance for industrial applications where A-grade (0.05%/10 ppm) is unnecessary but E-grade (0.5%/30 ppm) lacks sufficient stability.
Can LM4132CMFX-4.1 be used in automotive applications?
Yes - the LM4132-Q1 variant is AEC-Q100 Grade 1 qualified (–40°C to +125°C), and LM4132CMFX-4.1 shares identical electrical specs and SOT-23-5 packaging. While the 'C' suffix indicates commercial temperature range (–40°C to +125°C), TI validates both variants for automotive use when specified per Q1 requirements; consult TI's LM4132-Q1 datasheet for full qualification evidence.
What is the purpose of Pin 1 (N/C) on LM4132CMFX-4.1?
Pin 1 of LM4132CMFX-4.1 is a no-connect (N/C) terminal with no internal connection. It must be left electrically floating - neither tied to GND nor VIN. Routing copper or solder to this pad may induce parasitic coupling or mechanical stress, potentially affecting thermal performance or long-term reliability. Follow TI's DBV package layout guidelines strictly.
LM4132CMFX-4.1 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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 350µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.496V ~ 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
LM4132CMFX-4.1 FAQ
1.How can I place an order for LM4132CMFX-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132CMFX-4.1 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 LM4132CMFX-4.1 reliable?
The price and inventory of LM4132CMFX-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132CMFX-4.1 is usually 5 days.
3.What payment methods are accepted for LM4132CMFX-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132CMFX-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132CMFX-4.1?
LM4132CMFX-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132CMFX-4.1 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 LM4132CMFX-4.1?
For technical support, including LM4132CMFX-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132CMFX-4.1 requirements.
6.How does Aetrix verify that LM4132CMFX-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4132CMFX-4.1 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 LM4132CMFX-4.1 meets industry standards.
7.What is the process for return or replacement of LM4132CMFX-4.1?
All LM4132CMFX-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132CMFX-4.1, 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 LM4132CMFX-4.1 part is unused and in its original packaging.
Return procedure for LM4132CMFX-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132CMFX-4.1 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
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