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Texas Instruments LM4132DMFX-3.3
- Part No.:
- LM4132DMFX-3.3
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132DMFX-3.3.pdf
- Description:
- IC VREF SERIES 0.4% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,841
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Product details
Overview
LM4132DMFX-3.3 from Texas Instruments is a precision low-dropout (LDO) 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 to 5.5 V, supports up to 20 mA load, and features an enable pin for 3 µA shutdown - ideal for battery-powered instrumentation and data acquisition systems.
For engineers reviewing the LM4132DMFX-3.3 datasheet, LM4132DMFX-3.3 pinout, LM4132DMFX-3.3 application, or LM4132DMFX-3.3 equivalent, key selection criteria include dropout voltage (175 mV at 10 mA), 0.1–10 Hz noise (310 µVPP), line regulation (85 ppm/V), thermal hysteresis (75 ppm), and SOT-23-5 package compatibility in space-constrained designs.
Technical Context
The LM4132DMFX-3.3 uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar-level precision without requiring external output capacitance or buffer amplifiers. Its curvature, tempco, and accuracy are corrected at package level to overcome assembly-induced shifts.
It implements a series-shunt topology with integrated enable control, supporting both active operation (60 µA IQ) and ultra-low-power shutdown (3 µA). The device maintains 0.5% output accuracy down to 175 mV input-to-output differential at 10 mA load across –40°C to 125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal; enables direct interface with 3.3-V ADCs, DACs, and microcontrollers requiring precise reference inputs. |
| Initial Accuracy | ±0.05% (A grade); ensures ≤1.65 mV absolute error at 25°C, critical for 16-bit+ data converters. |
| Tempco | 10 ppm/°C (0°C to 85°C); contributes ≤0.83 mV drift over industrial temperature range, supporting high-stability measurement systems. |
| Dropout Voltage | 175 mV at 10 mA load; allows operation from 3.475 V input, extending battery life in single-cell Li-ion or 3.6-V supply rails. |
| Supply Current | 60 µA typical; minimizes system power budget in always-on sensor nodes and portable test equipment. |
| Shutdown Current | 3 µA with EN = 0 V; enables deep-sleep modes in energy-harvesting or duty-cycled applications. |
| Output Noise | 310 µVPP (0.1–10 Hz); low enough for 16-bit SAR ADCs without additional filtering. |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body size, surface-mount, thermally enhanced for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected; floating; no internal connection or function. |
| 2 - GND | Analog ground reference | Primary return path for reference output and internal bias; requires low-impedance PCB connection to minimize noise coupling. |
| 3 - EN | Digital enable input | Active-high logic control: VIH ≥ 65% VIN enables output; VIL ≤ 35% VIN forces shutdown mode. |
| 4 - VIN | Input supply rail | Accepts 3.475 V to 5.5 V; must be decoupled with ≥1 µF ceramic capacitor (CIN) per datasheet layout guidelines. |
| 5 - VREF | Precision reference output | 3.3 V regulated output capable of sourcing up to 20 mA; stable without COUT but benefits from optional 1–10 nF bypass for transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed CMOS band-gap | Enables factory calibration of curvature, tempco, and accuracy post-assembly - eliminating plastic-package-induced drift seen in laser-trimmed parts. |
| Enable-controlled shutdown | Reduces supply current from 60 µA to 3 µA, enabling >20× power savings during idle periods in portable instrumentation. |
| No output capacitor required | Eliminates BOM cost and board area for COUT; simplifies layout while maintaining stability with low-ESR ceramics on VIN only. |
| 20-mA output drive capability | Directly powers ADC reference inputs, op-amp bias networks, or small DACs - avoids need for external buffers in most signal-chain designs. |
| Low 0.1–10 Hz noise | 310 µVPP supports high-resolution DC measurements in weigh scales, medical sensors, and precision process controllers. |
Applications
| Portable Data Loggers | Automotive Battery Monitoring Units |
|---|---|
|
Use Scenario: Continuous voltage logging of 12-V lead-acid or 48-V EV battery cells using 16-bit SAR ADCs powered by a 3.3-V LDO rail. IC Role / Device Role / Timing Role: Provides stable 3.3 V reference for ADC conversion, ensuring <±1 LSB error over temperature and lifetime. Use Value: 10 ppm/°C tempco and 75 ppm thermal hysteresis prevent calibration drift between cold-start and hot-soak conditions in under-hood environments. |
Use Scenario: High-accuracy cell voltage sensing in ASIL-B compliant battery management systems (BMS) with redundant monitoring paths. IC Role / Device Role / Timing Role: Precision reference for isolated sigma-delta ADCs measuring individual Li-ion cell voltages in multi-cell packs. Use Value: AEC-Q100 Grade 1 qualification (–40°C to +125°C) and 0.05% initial accuracy meet automotive functional safety requirements for voltage reference integrity. |
| Industrial PLC Analog Input Modules | Handheld Test & Calibration Equipment |
|
Use Scenario: 4–20 mA loop-powered analog input cards requiring ratiometric ADC references traceable to metrology-grade standards. IC Role / Device Role / Timing Role: Primary voltage reference for 24-bit delta-sigma ADCs used in current/voltage measurement front-ends. Use Value: 50 ppm long-term stability (1000 hrs) and low 310 µVPP noise ensure repeatability and resolution compliance with IEC 61000-4-30 Class A power quality analyzers. |
Use Scenario: Battery-operated multimeters and calibrators needing self-contained, low-drift reference sources for field verification. IC Role / Device Role / Timing Role: On-board reference generator for auto-ranging voltage measurement circuits and internal DAC-based calibration offsets. Use Value: 3 µA shutdown current extends alkaline battery life beyond 1 year in standby, while 175 mV dropout enables operation down to 3.475 V input. |
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, no enable pin, SOT-23-5 | Lacks shutdown control and has higher tempco; suited for ultra-low-power always-on sensors where enable is unnecessary | Select REF3333AIDBVR only if shutdown is not required and 30 ppm/°C drift is acceptable for the application's accuracy budget. |
| ADR3433ARJZ-R7 | Fixed 3.3 V, 10 ppm/°C max tempco, 120 µA IQ, no enable, SOT-23-5, ±0.1% initial accuracy | Higher quiescent current and lower accuracy than LM4132DMFX-3.3 A-grade; no shutdown mode | Choose ADR3433ARJZ-R7 when higher output drive (>20 mA) or tighter long-term stability (<30 ppm) is needed, accepting higher IQ and no enable. |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, the LM4132DMFX-3.3 uniquely combines A-grade 0.05% accuracy, 10 ppm/°C tempco, 60 µA IQ, and 3 µA shutdown - making it optimal for high-precision, battery-sensitive applications requiring dynamic power control.
Availability
LM4132DMFX-3.3 is available at Aetrix Electronics and suitable for portable instrumentation, automotive battery monitoring, industrial PLC analog input modules, and handheld test equipment requiring stable component supply with guaranteed long-term availability.
Supply support for LM4132DMFX-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 in cost-effective CMOS technology for high-accuracy data acquisition, test equipment, and safety-critical automotive systems.
FAQ
What is the maximum load current supported by the LM4132DMFX-3.3?
The LM4132DMFX-3.3 supports up to 20 mA of continuous output current while maintaining specified accuracy and dropout performance. This is confirmed in Section 6.3 (Recommended Operating Conditions) and Table 6.9 of the TI datasheet SNVS372G. Exceeding 20 mA may degrade output regulation or cause thermal shutdown depending on ambient conditions and PCB layout.
Does the LM4132DMFX-3.3 require an output capacitor (COUT) for stability?
No, the LM4132DMFX-3.3 is internally compensated and stable without an output capacitor. The datasheet explicitly states "does not require an output capacitor or buffer amplifier" (Section 3, Description). A 1–10 nF ceramic capacitor on VREF is optional and improves transient response but is not required for basic stability.
What is the minimum input voltage required for the LM4132DMFX-3.3 to maintain regulation?
The minimum input voltage is VREF + 400 mV = 3.7 V under worst-case conditions (–40°C to +125°C), per Section 6.3. At 10 mA load and 25°C, the dropout is 175 mV, so VIN ≥ 3.475 V suffices. However, design margin requires using 3.7 V as the practical minimum to guarantee regulation across full temperature and load range.
Is the LM4132DMFX-3.3 qualified for automotive applications?
No - the LM4132DMFX-3.3 is the commercial-grade version. Automotive qualification applies only to the LM4132-Q1 variants (e.g., LM4132Q33IDBVRQ1). The "DMFX" suffix denotes the standard industrial/commercial SOT-23-5 package with no AEC-Q100 certification. Use LM4132Q33IDBVRQ1 for automotive designs.
How does the enable pin (EN) function on the LM4132DMFX-3.3?
The EN pin is an active-high digital input: VIH ≥ 65% of VIN enables the reference output; VIL ≤ 35% of VIN places the device in 3 µA shutdown mode. The threshold is ratiometric to VIN, ensuring robust operation across varying input rails. Pin 1 (N/C) must remain unconnected, and Pin 2 (GND) must be tied directly to system ground.
LM4132DMFX-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
LM4132DMFX-3.3 FAQ
1.How can I place an order for LM4132DMFX-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132DMFX-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 LM4132DMFX-3.3 reliable?
The price and inventory of LM4132DMFX-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 LM4132DMFX-3.3 is usually 5 days.
3.What payment methods are accepted for LM4132DMFX-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132DMFX-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132DMFX-3.3?
LM4132DMFX-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132DMFX-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 LM4132DMFX-3.3?
For technical support, including LM4132DMFX-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132DMFX-3.3 requirements.
6.How does Aetrix verify that LM4132DMFX-3.3 is sourced from the original manufacturer or authorized distributors?
All LM4132DMFX-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 LM4132DMFX-3.3 meets industry standards.
7.What is the process for return or replacement of LM4132DMFX-3.3?
All LM4132DMFX-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132DMFX-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 LM4132DMFX-3.3 part is unused and in its original packaging.
Return procedure for LM4132DMFX-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132DMFX-3.3 Tags
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