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Texas Instruments LM4132BMFX-3.3
- Part No.:
- LM4132BMFX-3.3
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132BMFX-3.3.pdf
- Description:
- IC VREF SERIES 0.1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,663
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Product details
Overview
LM4132BMFX-3.3 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 3.3 V output with ±0.1% initial accuracy (B-grade), 10 ppm/°C temperature coefficient (0°C to 85°C), 60 µA quiescent current, and 20 mA output drive capability. It operates from VIN = VREF + 400 mV (≥3.7 V) up to 5.5 V and features an enable pin for 3 µA shutdown mode-ideal for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4132BMFX-3.3 datasheet, LM4132BMFX-3.3 pinout, LM4132BMFX-3.3 application, or LM4132BMFX-3.3 equivalent, key selection considerations include its SOT-23-5 package, dropout voltage of 175 mV at 10 mA, 310 µVPP 0.1–10 Hz output noise, line regulation of 85 ppm/V, and automotive-qualified variants (LM4132-Q1) for extended temperature operation.
Technical Context
The LM4132BMFX-3.3 uses EEPROM-trimmed CMOS bandgap architecture to achieve laser-trimmed bipolar-level precision without laser trimming-correcting curvature, tempco, and initial accuracy at package level to overcome plastic-package assembly shifts. Its internal LDO regulator topology eliminates need for output buffer or mandatory output capacitor.
It integrates an enable-controlled shutdown path reducing supply current to 3 µA, supports load currents up to 20 mA, and maintains output stability with low-ESR ceramic capacitors only on input (CIN required, COUT optional). Dropout is defined as the minimum VIN–VREF differential causing 0.5% output deviation under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal, ±0.1% initial accuracy (B-grade) - ensures high-precision ADC/DAC biasing without calibration. |
| Tempco | 10 ppm/°C (0°C to 85°C), 20 ppm/°C (–40°C to 125°C) - enables stable performance across industrial temperature ranges. |
| Quiescent Current | 60 µA typical - minimizes power draw in always-on sensor nodes and portable equipment. |
| Dropout Voltage | 175 mV at 10 mA load - allows operation from single-cell Li-ion (3.7 V min) or regulated 3.3 V rails with margin. |
| Output Noise | 310 µVPP (0.1–10 Hz) - suitable for 16-bit+ data converters where low-frequency drift must be minimized. |
| Enable Threshold | VIL ≤35% VIN, VIH ≥65% VIN - provides robust digital control interface compatible with 3.3 V and 5 V logic. |
| Line Regulation | 85 ppm/V (VREF + 400 mV to 5.5 V) - limits output variation due to supply ripple in noisy DC-DC environments. |
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 (MSL-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect | Internally unconnected; must remain floating-no PCB trace or pull-up/down. |
| 2 - GND | Ground reference | Primary return path for reference output and internal circuitry; requires low-impedance connection to system ground plane. |
| 3 - EN | Enable control input | Active-high digital input; drives device into 3 µA shutdown when low, full operation when high (≥65% VIN). |
| 4 - VIN | Input supply | Power input (3.7 V to 5.5 V); must be bypassed with ≥1 µF ceramic capacitor (CIN) close to pin. |
| 5 - VREF | Precision output | 3.3 V reference source; capable of sourcing up to 20 mA; no output capacitor required for stability. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed CMOS bandgap | Enables post-assembly correction of tempco and accuracy-eliminates laser trimming cost while matching bipolar precision. |
| Low-dropout operation | 175 mV dropout at 10 mA allows use with tightly regulated supplies or single-cell batteries without headroom penalty. |
| Enable-controlled shutdown | Reduces supply current to 3 µA, enabling ultra-low-power sleep modes in portable and remote sensing applications. |
| Capacitor-free output stability | Stable with no output capacitor required-reduces BOM count, PCB area, and startup settling time in space-constrained designs. |
| Low-ESR input capacitor support | Validated with standard 1 µF X7R ceramic capacitor-avoids costly tantalum or polymer alternatives. |
Applications
| Portable Data Acquisition | Automotive Sensor Conditioning |
|---|---|
Use Scenario: Handheld multimeter or IoT edge node acquiring analog sensor signals with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 3.3 V reference for ADC voltage scaling and DAC feedback loop. Use Value: ±0.1% initial accuracy and 10 ppm/°C tempco ensure <0.02% full-scale error over temperature-enabling single-point calibration. |
Use Scenario: Engine control unit (ECU) measuring throttle position or exhaust gas oxygen via ratiometric sensors. IC Role / Device Role / Timing Role: Supplies excitation reference for bridge-based sensors and ADC reference simultaneously. Use Value: 20 mA drive capability powers both sensor bridge (5–10 mA) and ADC reference (1–2 mA) from one rail-reducing component count. |
| Industrial Process Controller | Battery-Powered Medical Monitor |
Use Scenario: PLC analog I/O module converting 4–20 mA loop signals to digital with isolated ADC. IC Role / Device Role / Timing Role: Precision reference for isolated sigma-delta ADC and internal LDO biasing. Use Value: 310 µVPP low-frequency noise prevents 1 LSB errors in 18-bit measurements-critical for sub-mA loop resolution. |
Use Scenario: Wearable ECG patch operating from coin-cell battery with multi-day runtime. IC Role / Device Role / Timing Role: Reference for low-noise instrumentation amplifier and ADC during active measurement bursts. Use Value: 3 µA shutdown current extends battery life by >20× versus always-on references-enabling weeks of standby between readings. |
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, 6 µA IQ, 5 mA output, SOT-23-5 - lower power but lower accuracy and drive. | Best for ultra-low-power sensor nodes where 0.2% accuracy suffices and load <5 mA. | Select REF3333AIDBVR when minimizing quiescent current is critical and tempco/accuracy requirements are relaxed. |
| ADR3433ARJZ-R7 | 3.3 V, 0.1% initial accuracy, 10 ppm/°C, 120 µA IQ, 10 mA output, SOT-23-5 - higher IQ, lower drive than LM4132BMFX-3.3. | Suitable for precision op-amp biasing or low-current ADCs where 20 mA drive is unnecessary. | Choose ADR3433ARJZ-R7 if sourcing from Analog Devices' qualified supply chain is required and 20 mA drive is not needed. |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, the LM4132BMFX-3.3 uniquely balances 0.1% accuracy, 20 mA drive, and 60 µA IQ in a single SOT-23-5 package-making it optimal for mixed-signal systems requiring both precision and output strength without external buffers.
Availability
LM4132BMFX-3.3 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial process controllers requiring stable component supply with guaranteed long-term availability and consistent parametric performance across production lots.
Supply support for LM4132BMFX-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, embedded processing, and connectivity technologies, serving industrial, automotive, and communications markets since 1930.
The LM4132 family was designed as a cost-effective, high-precision alternative to laser-trimmed bipolar references-targeting space-constrained, battery-powered, and automotive-qualified applications demanding low dropout, low noise, and programmable enable control.
FAQ
What is the maximum load current supported by the LM4132BMFX-3.3?
The LM4132BMFX-3.3 delivers up to 20 mA of continuous output current while maintaining specified accuracy and regulation. This is confirmed in Section 6.3 (Recommended Operating Conditions) and Table 6.9 of the TI SNVS372G datasheet. Exceeding 20 mA may cause output voltage deviation beyond the 0.5% dropout threshold or thermal derating in SOT-23-5 packaging.
Does the LM4132BMFX-3.3 require an output capacitor for stability?
No, the LM4132BMFX-3.3 is internally compensated and stable without an output capacitor-unlike many competing references. The datasheet explicitly states "COUT is optional" in the Simplified Schematic (page 2) and confirms stability with low-ESR ceramic capacitors only on the input (CIN required). This reduces BOM cost and PCB area.
What is the dropout voltage specification for the LM4132BMFX-3.3 at 10 mA load?
The dropout voltage for the LM4132BMFX-3.3 is 175 mV at 10 mA load and 25°C, as specified in Table 6.9 (Electrical Characteristics LM4132-3.3). Over the full –40°C to +125°C range, dropout remains ≤400 mV-enabling reliable operation from 3.7 V input even in cold environments.
How does the enable pin (EN) function on the LM4132BMFX-3.3?
The EN pin on the LM4132BMFX-3.3 is an active-high digital control input. When pulled ≥65% of VIN, the device operates normally; when ≤35% of VIN, it enters shutdown mode drawing only 3 µA. This behavior is verified in Table 6.9 (VIL/VIH specs) and Figure 3 (Enable Threshold Voltage and Hysteresis).
Is the LM4132BMFX-3.3 qualified for automotive applications?
The LM4132BMFX-3.3 itself is not AEC-Q100 qualified; however, the pin-compatible LM4132-3.3-Q1 variant (e.g., LM4132C33QDBVR) is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and listed in the same datasheet. Engineers requiring automotive qualification should select the -Q1 suffix version-not the standard LM4132BMFX-3.3.
LM4132BMFX-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:
- ±0.1%
- 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
LM4132BMFX-3.3 FAQ
1.How can I place an order for LM4132BMFX-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132BMFX-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 LM4132BMFX-3.3 reliable?
The price and inventory of LM4132BMFX-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 LM4132BMFX-3.3 is usually 5 days.
3.What payment methods are accepted for LM4132BMFX-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132BMFX-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132BMFX-3.3?
LM4132BMFX-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132BMFX-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 LM4132BMFX-3.3?
For technical support, including LM4132BMFX-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132BMFX-3.3 requirements.
6.How does Aetrix verify that LM4132BMFX-3.3 is sourced from the original manufacturer or authorized distributors?
All LM4132BMFX-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 LM4132BMFX-3.3 meets industry standards.
7.What is the process for return or replacement of LM4132BMFX-3.3?
All LM4132BMFX-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132BMFX-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 LM4132BMFX-3.3 part is unused and in its original packaging.
Return procedure for LM4132BMFX-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132BMFX-3.3 Tags
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