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Texas Instruments LM4132CMF-3.3
- Part No.:
- LM4132CMF-3.3
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132CMF-3.3.pdf
- Description:
- IC VREF SERIES 0.2% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,721
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Product details
Overview
LM4132CMF-3.3 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 3.3 V output with 0.2% 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-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4132CMF-3.3 datasheet, LM4132CMF-3.3 pinout, LM4132CMF-3.3 application, or LM4132CMF-3.3 equivalent, this page provides verified specifications, SOT-23 package layout, automotive-grade alternatives, real-world use cases in data acquisition and battery-powered systems, and supply-chain support for production ramp-up.
Technical Context
The LM4132CMF-3.3 uses EEPROM-trimmed CMOS band-gap architecture to correct curvature, tempco, and accuracy at package level - overcoming plastic-package assembly shifts that limit laser-trimmed bipolar references. Its internal LDO regulator eliminates need for output buffer or mandatory COUT.
It implements a 5-pin SOT-23 configuration with dedicated EN control, ground-referenced output, and input supply rail. Dropout is specified at 175 mV (typical, 10 mA load), and line/load regulation are 85 ppm/V and 25 ppm/mA respectively - enabling stable operation across wide input and load variations in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±0.2% (C grade, 25°C); enables precise 12-bit+ ADC reference without calibration |
| Tempco | 10 ppm/°C (0°C to 85°C); ensures ≤±0.83 mV drift over industrial range |
| Quiescent Current | 60 µA (typ); supports >1-year battery life in 10 µA-sleep systems |
| Shutdown Current | 3 µA (EN = 0 V); allows deep-sleep power gating in portable equipment |
| Max Load Current | 20 mA; drives SAR ADC reference inputs and op-amp bias networks directly |
| Dropout Voltage | 175 mV (typ, 10 mA); permits operation from 3.475 V input - compatible with single-cell LiFePO₄ |
| Noise (0.1–10 Hz) | 310 µVPP; meets <1 LSB noise budget for 16-bit 3.3 V full-scale converters |
Pinout & Package
SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, surface-mount, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N/C | No-connect terminal; must remain floating - not internally bonded |
| 2 | GND | Analog ground reference; requires low-impedance PCB connection to minimize noise coupling |
| 3 | EN | Active-high enable input; asserts VREF when ≥65% of VIN, disables to 3 µA when ≤35% of VIN |
| 4 | VIN | Input supply rail; minimum 3.475 V (3.3 V + 175 mV dropout) required for regulation |
| 5 | VREF | Stable 3.3 V reference output; capable of sourcing 20 mA with <0.5% error under full load |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed CMOS band-gap | Enables post-assembly correction of tempco and accuracy - eliminates laser-trimming yield loss in plastic packages |
| Enable-controlled shutdown | Reduces system standby power by >95% vs active mode; supports microcontroller-gated reference activation |
| Capacitor-stable design | Operates without mandatory output capacitor; compatible with low-ESR ceramic caps only on input (CIN required) |
| AEC-Q100 Grade 1 qualified | Validated for –40°C to +125°C ambient operation - suitable for under-hood automotive sensors and ECUs |
| Low-noise 0.1–10 Hz output | 310 µVPP enables direct interface to precision 16-bit delta-sigma ADCs without external filtering |
Applications
| Portable Data Logger | Automotive Cabin Sensor Node |
|---|---|
Use Scenario: Battery-powered environmental monitor logging temperature/humidity at 100 Hz using 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC VREF pin and analog front-end op-amp biasing. Use Value: 310 µVPP noise and 10 ppm/°C tempco ensure <±0.01% measurement error across –20°C to +70°C operating range. |
Use Scenario: Occupant detection system with capacitive sensing and local MCU in vehicle dashboard. IC Role / Device Role / Timing Role: Stable 3.3 V reference for analog signal conditioning and ADC conversion in AEC-Q100-compliant subsystem. Use Value: Grade 1 qualification and 20 mA drive capability allow direct replacement of discrete Zener+op-amp reference circuits. |
| Industrial PLC Analog Input Module | Medical Patient Monitor Front-End |
Use Scenario: 8-channel 24-bit isolated analog input card for factory automation with cold-junction compensation. IC Role / Device Role / Timing Role: Precision reference for multiplexed ADC and thermocouple amplifier gain-setting resistors. Use Value: 0.2% initial accuracy and 50 ppm long-term stability eliminate field recalibration for 5-year service intervals. |
Use Scenario: Portable ECG device acquiring biopotential signals with 100 dB SNR requirement. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier and ADC reference in battery-operated wearable. Use Value: 60 µA quiescent current extends 2000 mAh battery life to >72 hours continuous operation. |
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 | Fixed 3.3 V, 30 ppm/°C max tempco (–40°C to +125°C), 6 µA IQ, 5 mA max load | Lower power but lower drive strength; unsuitable for >5 mA reference loads or high-temp industrial use | Select for ultra-low-power sensor nodes where load <5 mA and tempco <30 ppm/°C is acceptable |
| LM4040C33IDCKR | Shunt reference, 3.3 V, 0.5% initial accuracy, no enable pin, 15 ppm/°C, 60 µA min cathode current | Requires external bias resistor; less efficient in battery systems due to idle current; no shutdown mode | Select when board space allows resistor-based biasing and system-level enable control is unavailable |
Compared with REF3333AIDBVR and LM4040C33IDCKR, the LM4132CMF-3.3 uniquely combines 20 mA drive, enable-controlled shutdown, and 10 ppm/°C tempco in SOT-23 - making it optimal for space-constrained, high-accuracy, medium-load applications where dynamic power control is critical.
Availability
LM4132CMF-3.3 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin electronics, and industrial PLC analog input modules requiring stable component supply with guaranteed long-term availability.
Supply support for LM4132CMF-3.3 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, space-critical applications including data acquisition, test equipment, and automotive sensor interfaces - leveraging EEPROM trimming to achieve laser-grade performance in cost-effective CMOS packaging.
FAQ
What is the maximum input voltage for the LM4132CMF-3.3?
The LM4132CMF-3.3 supports a maximum input voltage of 5.5 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable regulation, VIN must be ≥ VREF + 400 mV (i.e., ≥3.475 V), with recommended operation between 3.5 V and 5.5 V to maintain 0.5% output accuracy across load and temperature.
Does the LM4132CMF-3.3 require an output capacitor?
No, the LM4132CMF-3.3 does not require an output capacitor for stability - unlike many LDO references. The datasheet explicitly states COUT is optional. However, a 0.1 µF ceramic capacitor may be added to reduce high-frequency noise. Input capacitor CIN (≥1 µF ceramic) is mandatory to suppress supply transients and ensure transient response integrity.
What does the 'C' grade signify in LM4132CMF-3.3?
The 'C' in LM4132CMF-3.3 denotes the accuracy grade: initial output voltage tolerance of ±0.2% at 25°C, and temperature coefficient of 20 ppm/°C over –40°C to +125°C (or 10 ppm/°C over 0°C to +85°C). This grade balances cost and performance for industrial and automotive applications where tighter tolerances than 'D' or 'E' grades are needed but 'A' grade precision is unnecessary.
Can the LM4132CMF-3.3 drive a 10 kΩ load directly?
Yes - the LM4132CMF-3.3 can drive a 10 kΩ load (330 µA at 3.3 V) with negligible error. Its 20 mA max output current far exceeds this requirement. At 330 µA load, output deviation remains within ±0.005% due to its 25 ppm/mA load regulation - well within the ±0.2% initial accuracy window. No buffering is needed for typical ADC reference or op-amp bias applications.
Is LM4132CMF-3.3 pin-compatible with LM4132AMF-3.3?
Yes, LM4132CMF-3.3 and LM4132AMF-3.3 share identical SOT-23 (DBV) 5-pin pinout, package dimensions, and terminal functions. The only difference is initial accuracy (±0.2% vs ±0.05%) and tempco specification - both devices use the same die and package, allowing drop-in replacement where tighter tolerances are not required.
LM4132CMF-3.3 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.2%
- 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
LM4132CMF-3.3 FAQ
1.How can I place an order for LM4132CMF-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132CMF-3.3 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 LM4132CMF-3.3 reliable?
The price and inventory of LM4132CMF-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132CMF-3.3 is usually 5 days.
3.What payment methods are accepted for LM4132CMF-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132CMF-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132CMF-3.3?
LM4132CMF-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132CMF-3.3 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 LM4132CMF-3.3?
For technical support, including LM4132CMF-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132CMF-3.3 requirements.
6.How does Aetrix verify that LM4132CMF-3.3 is sourced from the original manufacturer or authorized distributors?
All LM4132CMF-3.3 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 LM4132CMF-3.3 meets industry standards.
7.What is the process for return or replacement of LM4132CMF-3.3?
All LM4132CMF-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132CMF-3.3, 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 LM4132CMF-3.3 part is unused and in its original packaging.
Return procedure for LM4132CMF-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132CMF-3.3 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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