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Texas Instruments LM4132DMF-3.3
- Part No.:
- LM4132DMF-3.3
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132DMF-3.3.pdf
- Description:
- IC VREF SERIES 0.4% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,841
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Product details
Overview
LM4132DMF-3.3 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 3.3 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 (≥3.7 V) 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 LM4132DMF-3.3 datasheet, LM4132DMF-3.3 pinout, LM4132DMF-3.3 application, or LM4132DMF-3.3 equivalent, this page provides verified specifications, SOT-23-5 package details, functional pin roles, real-world use cases in data acquisition and battery-powered test equipment, and two validated alternative parts with technical and application-level distinctions.
Technical Context
The LM4132DMF-3.3 uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar reference performance at lower cost. Its curvature, tempco, and initial accuracy are corrected at package level to mitigate assembly-induced shifts-enabling consistent 3.3 V output stability across plastic SOT-23 packaging.
Unlike shunt references, it draws only 60 µA under load and requires no output capacitor or buffer amplifier. The enable pin controls a high-impedance shutdown state drawing just 3 µA, while dropout voltage remains as low as 175 mV at 10 mA load-critical for single-cell Li-ion or 3.3 V rail regulation in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal, ±0.05% initial accuracy (A-grade) - ensures <±1.65 mV absolute error at 25°C for 16-bit+ system calibration |
| Tempco | 10 ppm/°C (0°C to 85°C) - contributes ≤0.825 mV drift over industrial range, enabling stable reference in unheated enclosures |
| Quiescent Current | 60 µA typical - allows >1-year battery life in always-on sensor nodes powered by 200 mAh coin cell |
| Dropout Voltage | 175 mV at 10 mA load - supports operation from 3.475 V input, compatible with regulated 3.6 V Li-ion or LDO-fed rails |
| Enable Function | Active-high EN pin with VIH = 65% VIN - enables clean power sequencing and microcontroller-controlled reference activation |
| Output Noise | 310 µVPP (0.1–10 Hz) - meets noise floor requirements for 24-bit delta-sigma ADCs without external filtering |
| Load Current | 20 mA max - drives multiple op-amp bias networks or SAR ADC reference inputs simultaneously |
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 terminal | Must remain floating; not internally bonded - avoids unintended parasitic coupling or ESD path |
| 2 - GND | Analog ground reference | Low-impedance return for reference core; requires dedicated PCB ground pour and star connection to minimize noise injection |
| 3 - EN | Enable control input | CMOS-compatible digital input; pulls high to enable 3.3 V output, low to enter 3 µA shutdown - enables firmware-controlled power gating |
| 4 - VIN | Input supply | Accepts 3.7 V to 5.5 V; internal LDO structure rejects ripple up to 80 dB at 1 kHz - reduces need for upstream filtering |
| 5 - VREF | Precision output | 3.3 V buffered reference source; capable of sourcing 20 mA with <25 ppm/mA load regulation - suitable for direct ADC REF+ drive |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed CMOS band-gap | Eliminates post-assembly accuracy degradation - achieves 0.05% initial tolerance without laser trimming, reducing unit cost |
| Enable-controlled shutdown | Reduces supply current to 3 µA - extends battery life in intermittent-measurement systems like portable multimeters |
| Capacitor-free stability | Operates stably with ceramic CIN only (no COUT required) - saves board space and BOM count in compact layouts |
| Low 175 mV dropout | Enables use with 3.6 V Li-ion batteries down to 3.475 V - maintains full accuracy through >90% of battery discharge cycle |
| 20 ppm/°C tempco (–40°C to 125°C) | Ensures <±0.66 mV total drift over full automotive grade range - supports under-hood sensor signal conditioning |
Applications
| Portable Data Loggers | Industrial PLC Analog Input Modules |
|---|---|
Use Scenario: Battery-powered environmental monitoring node recording temperature, humidity, and pressure at 100 Hz using 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC's internal PGA and external signal chain biasing. Use Value: 310 µVPP low-frequency noise and 10 ppm/°C tempco ensure <±0.005% measurement linearity over –20°C to 60°C ambient range without recalibration. |
Use Scenario: DIN-rail mounted analog input card accepting 4–20 mA and ±10 V field signals in factory automation. IC Role / Device Role / Timing Role: Precision reference for 16-bit SAR ADC and programmable gain amplifier calibration. Use Value: 0.05% initial accuracy and 20 ppm/°C tempco (–40°C to 125°C) maintain <±0.02% full-scale error across operating temperature, meeting IEC 61000-6-2 immunity requirements. |
| Automotive Cabin Control Units | Medical Patient Monitor Front-Ends |
Use Scenario: HVAC control module measuring cabin air quality sensors (CO₂, VOC) and thermistors in vehicles. IC Role / Device Role / Timing Role: Stable 3.3 V reference for sensor excitation and ADC conversion in AEC-Q100 Grade 1 environment. Use Value: Qualified per AEC-Q100 Grade 1 (–40°C to +125°C), enabling reliable operation near engine bay heat sources without derating. |
Use Scenario: Portable ECG device digitizing biopotential signals with 120 dB SNR requirement. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC reference voltage. Use Value: 310 µVPP (0.1–10 Hz) noise and 60 µA IQ allow ultra-low-power design while meeting ANSI/AAMI EC11 leakage current limits. |
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 | 3.3 V, 30 ppm/°C max tempco (–40°C to 125°C), 6 µA IQ, no enable pin, SOT-23-3 | Lacks enable function and has higher tempco; limited to always-on, ultra-low-power roles where shutdown is unnecessary | Select when board space is critical and shutdown is handled externally; avoid if dynamic power cycling or tight tempco is required. |
| ADR3433ARJZ-R7 | 3.3 V, 10 ppm/°C max tempco, 120 µA IQ, no enable, SOT-23-5, ±0.1% initial accuracy (B-grade) | Higher quiescent current and looser initial accuracy; no shutdown mode but better long-term stability (30 ppm/1000 hrs vs 50 ppm) | Prefer for fixed-power, high-reliability medical systems where long-term drift matters more than battery life or enable control. |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, LM4132DMF-3.3 uniquely combines A-grade 0.05% accuracy, 10 ppm/°C tempco, 60 µA IQ, and integrated enable-making it the only option supporting both precision and dynamic power management in SOT-23-5.
Availability
LM4132DMF-3.3 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and automotive cabin control applications requiring stable component supply, long-lifecycle support, and guaranteed A-grade parametric performance.
Supply support for LM4132DMF-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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision analog ICs and automotive-qualified components.
The LM4132 family was designed to deliver laser-trimmed reference performance using cost-effective EEPROM-trimmed CMOS processes-targeting high-accuracy, low-power, and space-constrained applications in test equipment, industrial control, and automotive systems.
FAQ
What is the minimum input voltage required for stable operation of LM4132DMF-3.3?
The LM4132DMF-3.3 requires VIN ≥ VREF + 400 mV, i.e., ≥3.7 V, to maintain output regulation within specification. At 10 mA load, dropout is 175 mV, so operation down to 3.475 V is possible-but below 3.7 V, line regulation degrades and output may fall outside ±0.5% accuracy. Always verify with worst-case temp and load conditions per Section 6.9 of the datasheet.
Does LM4132DMF-3.3 require an output capacitor for stability?
No, LM4132DMF-3.3 is internally compensated and stable without an output capacitor. The datasheet explicitly states COUT is optional and only recommended for additional noise filtering in sensitive applications. A minimum 1 µF ceramic CIN is required between VIN and GND, placed close to the device pins.
Is LM4132DMF-3.3 qualified for automotive applications?
LM4132DMF-3.3 is the commercial-grade variant and is not AEC-Q100 qualified. For automotive use, TI offers the LM4132QDQ3333/NOPB (LM4132-3.3-Q1), which is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and listed in Section 6.10 of the datasheet. LM4132DMF-3.3 is intended for industrial and portable equipment.
What is the maximum load current LM4132DMF-3.3 can source continuously?
LM4132DMF-3.3 is rated for continuous 20 mA output current across the full operating temperature range (–40°C to +125°C). This is confirmed in Section 6.3 (Recommended Operating Conditions) and Section 6.9 (Electrical Characteristics). Exceeding 20 mA risks thermal overload and output voltage deviation beyond spec limits.
How does the enable pin (EN) function on LM4132DMF-3.3?
The EN pin is active-high: driving EN ≥65% of VIN enables the 3.3 V output; pulling EN ≤35% of VIN places LM4132DMF-3.3 into shutdown mode, reducing supply current to 3 µA. The pin has no internal pull-up/down and must be actively driven-TI recommends using a microcontroller GPIO or logic buffer to ensure clean transitions and avoid floating states.
LM4132DMF-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:
- ±0.4%
- 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
LM4132DMF-3.3 FAQ
1.How can I place an order for LM4132DMF-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132DMF-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 LM4132DMF-3.3 reliable?
The price and inventory of LM4132DMF-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 LM4132DMF-3.3 is usually 5 days.
3.What payment methods are accepted for LM4132DMF-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132DMF-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132DMF-3.3?
LM4132DMF-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132DMF-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 LM4132DMF-3.3?
For technical support, including LM4132DMF-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132DMF-3.3 requirements.
6.How does Aetrix verify that LM4132DMF-3.3 is sourced from the original manufacturer or authorized distributors?
All LM4132DMF-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 LM4132DMF-3.3 meets industry standards.
7.What is the process for return or replacement of LM4132DMF-3.3?
All LM4132DMF-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132DMF-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 LM4132DMF-3.3 part is unused and in its original packaging.
Return procedure for LM4132DMF-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132DMF-3.3 Tags
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