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Texas Instruments LM4132DMFX-3.0
- Part No.:
- LM4132DMFX-3.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132DMFX-3.0.pdf
- Description:
- IC VREF SERIES 0.4% SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM4132DMFX-3.0 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 3.0 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 (min) up to 5.5 V, supports 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 LM4132DMFX-3.0 datasheet, LM4132DMFX-3.0 pinout, LM4132DMFX-3.0 application, or LM4132DMFX-3.0 equivalent, key selection criteria include dropout voltage at 10 mA (175 mV typ), line regulation (70 ppm/V), load regulation (25 ppm/mA), thermal hysteresis (75 ppm), and compatibility with low-ESR ceramic capacitors without requiring an output buffer.
Technical Context
The LM4132DMFX-3.0 uses EEPROM-trimmed CMOS band-gap architecture to correct curvature, tempco, and initial accuracy at package level - overcoming assembly-induced shifts that limit laser-trimmed bipolar references. Its internal LDO regulator delivers precise 3.0 V output independent of input ripple within VREF + 400 mV to 5.5 V.
It integrates an active enable circuit with VIH = 65% VIN and VIL = 35% VIN, enabling clean power sequencing. The device achieves 240 µVPP (0.1–10 Hz) output noise and maintains ±0.5% output accuracy down to 175 mV dropout at 10 mA - critical for battery-powered 16-bit+ data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal; A-grade devices guaranteed ±0.05% initial accuracy at 25°C - enables direct interface with 3.0 V ADC reference inputs without calibration. |
| Tempco | 10 ppm/°C (0°C to 85°C); ≤20 ppm/°C over –40°C to 125°C - ensures <±0.05% drift across industrial temperature range. |
| Dropout Voltage | 175 mV typical at 10 mA load - allows operation from 3.175 V supply, extending battery life in single-cell Li-ion or 3.3 V rail applications. |
| Quiescent Current | 60 µA typical; drops to 3 µA in shutdown - supports ultra-low-power wake-on-event sensor nodes with microamp-level standby budgets. |
| Load Regulation | 25 ppm/mA (0–20 mA); ≤120 ppm/mA over full temp range - guarantees <±50 ppm output shift under full load, suitable for precision DAC buffers. |
| Line Regulation | 70 ppm/V (VREF + 400 mV to 5.5 V) - rejects >99.99% of input supply variation, eliminating need for post-regulation filtering in noisy SMPS environments. |
| Output Noise | 285 µVPP (0.1–10 Hz) - meets SNR requirements for 18-bit SAR ADCs without external noise-reduction circuitry. |
Pinout & Package
SOT-23 (DBV) 5-pin plastic package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected. Pin 1 is NC (no connect), pin 2 is GND, pin 3 is EN, pin 4 is VIN, and pin 5 is VREF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No-connect terminal | Must remain floating; no PCB trace or solder connection - avoids parasitic coupling or mechanical stress on die bond wire. |
| Pin 2 (GND) | Analog ground reference | Primary return path for reference current and load current; requires low-impedance star connection to system AGND plane. |
| Pin 3 (EN) | Digital enable input | Active-high logic control: VIH ≥ 65% VIN enables output; VIL ≤ 35% VIN forces 3 µA shutdown - supports MCU GPIO direct drive without level-shifting. |
| Pin 4 (VIN) | Input supply rail | Accepts 3.4 V to 5.5 V; minimum headroom is VREF + 400 mV - enables use with buck converters or LDOs having ≥400 mV dropout. |
| Pin 5 (VREF) | Precision output terminal | Delivers regulated 3.0 V; requires 100 nF ceramic CIN on VIN and optional COUT on VREF - stable without external buffer even at 20 mA. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based curvature correction | Compensates for second-order temperature nonlinearity in CMOS band-gap core - achieves 10 ppm/°C tempco without laser trimming or external components. |
| Enable-controlled shutdown | Reduces supply current from 60 µA to 3 µA - extends battery runtime by >95% during idle periods in portable test equipment. |
| Capacitor-stable operation | Works with standard 100 nF X7R ceramic input capacitor; no output capacitor required - saves board space and eliminates ESR-related instability risks. |
| High load drive capability | 20 mA continuous output current - directly powers precision op-amps, ADC references, and small logic rails without external pass transistors. |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient) - validated for engine control modules, ADAS sensors, and infotainment power management. |
Applications
| Portable Data Loggers | Industrial PLC Analog I/O Modules |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure with 16-bit ADC sampling every 10 seconds. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for ADC and signal-conditioning op-amps; enabled only during conversion burst. Use Value: 60 µA quiescent current and 3 µA shutdown extend CR2032 battery life to >2 years; 175 mV dropout allows operation down to 3.175 V, maximizing usable battery voltage range. |
Use Scenario: DIN-rail mounted programmable logic controller with 4–20 mA analog input channels and isolated 3.3 V digital domain. IC Role / Device Role / Timing Role: Generates precision 3.0 V reference for 24-bit sigma-delta ADC front-end, referenced against isolated 3.3 V supply. Use Value: 0.05% initial accuracy and 20 ppm/°C tempco ensure <±0.01% total error over –25°C to +70°C operating range - meets IEC 61000-6-2 immunity requirements. |
| Medical Patient Monitor Front-Ends | Automotive Battery Management Systems |
|
Use Scenario: Portable ECG monitor digitizing biopotential signals with 20-bit resolution and 1 kSPS sampling rate. IC Role / Device Role / Timing Role: Supplies low-noise 3.0 V reference to ADC and instrumentation amplifier; placed near analog section to minimize routing noise. Use Value: 285 µVPP (0.1–10 Hz) output noise contributes <0.5 LSB error in 20-bit conversion - eliminates need for external RC filtering or chopper stabilization. |
Use Scenario: Cell-voltage monitoring IC in 12S lithium-ion BMS, where reference stability directly impacts state-of-charge accuracy. IC Role / Device Role / Timing Role: Provides 3.0 V reference for 16-bit SAR ADC measuring individual cell voltages across –40°C to +105°C ambient. Use Value: AEC-Q100 Grade 1 qualification and 75 ppm thermal hysteresis ensure repeatable measurements after thermal cycling - critical for long-term SoC drift compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3330AIDBVR | 3.0 V, 30 ppm/°C max tempco, 6 µA IQ, SOT-23-5 - lower quiescent current but higher tempco and no enable pin. | Limited to ultra-low-power, non-sequenced applications where tempco <10 ppm/°C is not required. | Select REF3330AIDBVR only when sub-10 µA standby is mandatory and temperature drift budget allows ≥30 ppm/°C. |
| ADR3430ARJZ-R7 | 3.0 V, 10 ppm/°C max tempco, 120 µA IQ, SOT-23-5 - same tempco grade but 2× higher supply current and no shutdown mode. | Suitable for always-on industrial sensors but incompatible with duty-cycled battery systems. | Choose ADR3430ARJZ-R7 when continuous operation is required and 120 µA IQ is acceptable - avoid if shutdown sequencing is needed. |
Compared with REF3330AIDBVR and ADR3430ARJZ-R7, the LM4132DMFX-3.0 uniquely combines A-grade 10 ppm/°C tempco, 3 µA shutdown, and 20 mA drive in one SOT-23 package - making it the only option for battery-powered, high-accuracy, sequenced analog subsystems.
Availability
LM4132DMFX-3.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC analog I/O, medical patient monitors, and automotive battery management systems requiring stable component supply with guaranteed long-term availability.
Supply support for LM4132DMFX-3.0 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 ICs, embedded processors, and digital signal processors for industrial, automotive, and consumer markets.
The LM4132 family was developed to deliver laser-trimmed bipolar reference performance using cost-effective, EEPROM-programmable CMOS technology - specifically targeting high-accuracy, low-power, and space-constrained applications in portable and automotive electronics.
FAQ
What is the maximum input voltage for LM4132DMFX-3.0?
The absolute maximum input voltage for LM4132DMFX-3.0 is 6 V, but the recommended operating maximum is 5.5 V. Exceeding 5.5 V may degrade long-term reliability or trigger overvoltage protection in adjacent circuitry. For normal operation, VIN must be ≥ VREF + 400 mV (i.e., ≥3.4 V) and ≤5.5 V per the datasheet's Recommended Operating Conditions table.
Does LM4132DMFX-3.0 require an output capacitor?
No, LM4132DMFX-3.0 does not require an output capacitor for stability - it is explicitly designed to operate without COUT, unlike many older voltage references. A 100 nF ceramic capacitor on VIN (CIN) is mandatory, but COUT is optional and only used to further reduce high-frequency noise if system-level EMI testing reveals margin issues.
What grade is LM4132DMFX-3.0 and what does the 'DMFX' suffix indicate?
LM4132DMFX-3.0 is an A-grade device, confirmed by its part number suffix and electrical characteristics tables showing ±0.05% initial accuracy and 10 ppm/°C tempco. The 'DMFX' denotes the SOT-23 (DBV) package with tape-and-reel packaging ('X') and commercial temperature range ('M'), per TI's orderable addendum - distinct from automotive 'Q1' variants.
Can LM4132DMFX-3.0 drive a 20 mA load continuously?
Yes, LM4132DMFX-3.0 is rated for continuous 20 mA output current across its full operating temperature range (–40°C to +125°C). This is verified in Section 6.3 (Recommended Operating Conditions) and supported by thermal metrics: RθJA = 164.1°C/W ensures junction temperature remains below 125°C at 20 mA with 5 V input and 25°C ambient.
How does the enable pin (EN) function on LM4132DMFX-3.0?
The EN pin on LM4132DMFX-3.0 is an active-high digital control input. When pulled to ≥65% of VIN, the device enables and delivers 3.0 V output; when pulled to ≤35% of VIN, it enters 3 µA shutdown mode. No external pull-up/down resistors are needed - direct connection to a microcontroller GPIO suffices for power sequencing.
LM4132DMFX-3.0 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.4%
- Temperature Coefficient:
- 20ppm/°C
- Noise - 0.1Hz to 10Hz:
- 285µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.4V ~ 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-3.0 FAQ
1.How can I place an order for LM4132DMFX-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132DMFX-3.0 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-3.0 reliable?
The price and inventory of LM4132DMFX-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132DMFX-3.0 is usually 5 days.
3.What payment methods are accepted for LM4132DMFX-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132DMFX-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132DMFX-3.0?
LM4132DMFX-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132DMFX-3.0 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-3.0?
For technical support, including LM4132DMFX-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132DMFX-3.0 requirements.
6.How does Aetrix verify that LM4132DMFX-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4132DMFX-3.0 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-3.0 meets industry standards.
7.What is the process for return or replacement of LM4132DMFX-3.0?
All LM4132DMFX-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132DMFX-3.0, 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-3.0 part is unused and in its original packaging.
Return procedure for LM4132DMFX-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132DMFX-3.0 Tags
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