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Texas Instruments LM4132EMFX-3.3/NOPB
- Part No.:
- LM4132EMFX-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132EMFX-3.3/NOPB.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,660
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Product details
Overview
LM4132EMFX-3.3/NOPB 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), 60 µA supply current, and 20 mA output drive capability. It operates from VIN = VREF + 400 mV up to 5.5 V and supports shutdown via an enable pin, making it suitable for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4132EMFX-3.3/NOPB datasheet, LM4132EMFX-3.3/NOPB pinout, LM4132EMFX-3.3/NOPB application, or LM4132EMFX-3.3/NOPB equivalent, key selection criteria include dropout voltage at 10 mA (175 mV typ), load regulation (25 ppm/mA), 0.1–10 Hz noise (310 µVPP), thermal hysteresis (75 ppm), and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4132EMFX-3.3/NOPB uses EEPROM-trimmed CMOS bandgap architecture to achieve laser-trimmed bipolar-level precision without requiring external output capacitance or buffer amplifiers. Its curvature correction and tempco compensation are programmed at package level to counteract assembly-induced shifts.
This device implements a series topology with integrated enable logic, supporting 3 µA shutdown mode and operating across –40°C to +125°C ambient. It delivers 20 mA output while maintaining 0.5% output accuracy down to a 175 mV (typ) input-to-output differential at 10 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±0.05% (A-grade), enabling direct interface with 3.3 V ADC reference inputs without gain calibration |
| Tempco | 10 ppm/°C (0°C to 85°C), ensuring ≤±0.825 mV drift over industrial temperature range for <12-bit system accuracy |
| Dropout Voltage | 175 mV (typ) at 10 mA, allowing operation from 3.475 V input - critical for single-cell Li-ion or regulated 3.6 V rails |
| Supply Current | 60 µA (typ), reducing quiescent power to 0.18 mW at 3 V - essential for battery-powered multimeters and data loggers |
| Noise (0.1–10 Hz) | 310 µVPP, limiting added uncertainty to <0.01% FS in 16-bit SAR ADC systems with 3.3 V full-scale range |
| Enable Threshold | VIL = 35% VIN, VIH = 65% VIN - compatible with standard CMOS logic driving from same rail without level shifters |
| Load Regulation | 25 ppm/mA, contributing ≤±50 ppm error over 0–20 mA load variation - sufficient for driving multiple op-amp references |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain floating; no internal connection - avoids unintended parasitic paths or ESD coupling |
| 2 - GND | Analog ground reference | Primary return path for reference current and output load; requires low-impedance connection to clean AGND plane |
| 3 - EN | Digital enable input | Active-high control: drives device into 3 µA shutdown when pulled low; threshold defined relative to VIN |
| 4 - VIN | Input supply | Accepts 3.7 V to 5.5 V; must be ≥ VREF + 400 mV for regulation - decoupling capacitor required per datasheet |
| 5 - VREF | Precision output | 3.3 V reference source capable of sourcing 20 mA; stable with low-ESR ceramic capacitors only - no tantalum needed |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based curvature correction | Compensates die-package assembly shift in final test, eliminating need for post-packaging laser trimming and enabling A-grade spec in plastic SOT-23 |
| Zero-output-capacitor operation | Stable without COUT - reduces BOM count and board area vs. shunt references requiring minimum 1 µF |
| 20 mA output drive | Directly powers multiple downstream devices (e.g., ADC REF pins, op-amp bias networks) without external buffers |
| Low 3 µA shutdown current | Extends battery life in portable equipment during sleep modes - e.g., adds only 0.0108 C per 100 hrs at 3 V |
| Automotive qualification option | LM4132-Q1 variant meets AEC-Q100 Grade 1 (–40°C to +125°C) - LM4132EMFX-3.3/NOPB is commercial-grade but shares core design |
Applications
| Portable Multimeter Front-End | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: High-precision DC voltage measurement using 16-bit SAR ADC with ratiometric sensing. IC Role / Device Role / Timing Role: Provides stable 3.3 V reference for ADC VREF pin and signal-chain biasing. Use Value: 10 ppm/°C tempco and 310 µVPP noise ensure <±0.02% reading error over –20°C to +70°C operating range without recalibration. |
Use Scenario: Isolated 4–20 mA loop-powered sensor interface with local ADC digitization. IC Role / Device Role / Timing Role: Supplies accurate 3.3 V reference to sigma-delta ADC and analog front-end op-amps. Use Value: 20 mA drive capability powers entire signal chain; 175 mV dropout enables operation from 3.475 V isolated supply derived from loop energy. |
| Battery-Powered Data Logger | Medical Patient Monitor Signal Chain |
Use Scenario: Long-duration environmental logging using coin-cell or Li-SOCl₂ primary battery. IC Role / Device Role / Timing Role: Reference source for low-power microcontroller ADC and sensor excitation circuitry. Use Value: 60 µA active current and 3 µA shutdown minimize average power; 0.05% initial accuracy eliminates factory calibration step. |
Use Scenario: ECG/EEG front-end with programmable gain amplifier and 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-noise 3.3 V reference for ADC and PGA bias networks in analog signal path. Use Value: 310 µVPP (0.1–10 Hz) noise contributes <0.005% FS error - below clinical-grade resolution requirements for 5 µV bio-potential signals. |
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 output, SOT-23-5 | Lower power but lower drive and higher tempco; unsuitable for >10 mA loads or wide-temp industrial use | Select for ultra-low-power sensor nodes where 5 mA drive suffices and tempco tolerance >30 ppm/°C is acceptable |
| ADR3433ARJZ-R7 | 3.3 V, 10 ppm/°C max (–40°C to +125°C), 120 µA IQ, 15 mA output, SOT-23-5 | Higher quiescent current and lower output drive than LM4132EMFX-3.3/NOPB; tighter tempco over full range | Select when full –40°C to +125°C tempco guarantee is mandatory and 15 mA drive meets system needs |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, the LM4132EMFX-3.3/NOPB uniquely balances 20 mA drive, 10 ppm/°C (0°C–85°C) tempco, and 60 µA supply current in a cost-effective SOT-23-5 package - making it optimal for portable test gear and industrial DAQ requiring both precision and robust load capability.
Availability
LM4132EMFX-3.3/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and battery-powered data acquisition systems requiring stable component supply with guaranteed long-term parametric consistency.
Supply support for LM4132EMFX-3.3/NOPB 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 broad industrial portfolio coverage.
The LM4132 family was designed to deliver laser-trimmed bipolar reference performance using cost-effective CMOS EEPROM-trimming - targeting high-accuracy data conversion, test equipment, and automotive-qualified systems needing low dropout and low noise.
FAQ
What is the maximum load current supported by the LM4132EMFX-3.3/NOPB?
The LM4132EMFX-3.3/NOPB supports up to 20 mA of continuous output current while maintaining 0.5% output voltage accuracy. This is confirmed in Section 6.3 (Recommended Operating Conditions) and Table 6.9 of the official TI datasheet SNVS372G. Exceeding 20 mA may cause output droop beyond specification limits and is not recommended for reliable operation of the LM4132EMFX-3.3/NOPB.
Does the LM4132EMFX-3.3/NOPB require an output capacitor for stability?
No, the LM4132EMFX-3.3/NOPB is explicitly designed to operate stably without an output capacitor - a key differentiator from most shunt and many series references. The datasheet states "stable with low-ESR ceramic capacitors" and clarifies that COUT is optional. However, a minimum 1 µF input capacitor (CIN) on VIN is mandatory per Figure 1 and Section 8.2. This applies directly to the LM4132EMFX-3.3/NOPB configuration.
What is the dropout voltage specification for the LM4132EMFX-3.3/NOPB at 10 mA load?
The dropout voltage for the LM4132EMFX-3.3/NOPB is specified as 175 mV (typical) and 400 mV (max) at 10 mA load, per Table 6.9 (Electrical Characteristics LM4132-3.3). Dropout is defined as the minimum VIN − VREF differential at which output drops by 0.5% from nominal. This allows the LM4132EMFX-3.3/NOPB to regulate from as low as 3.475 V input under typical conditions.
Is the LM4132EMFX-3.3/NOPB qualified for automotive applications?
No - the LM4132EMFX-3.3/NOPB is the commercial-grade version. Automotive qualification is available only in the LM4132-Q1 family (e.g., LM4132Q33IDBVRQ1), which meets AEC-Q100 Grade 1 (–40°C to +125°C ambient) and includes additional stress testing. The LM4132EMFX-3.3/NOPB shares identical electrical specs and pinout but lacks automotive certification documentation and screening, so it is not approved for automotive use cases.
What does the 'E' grade designation mean in LM4132EMFX-3.3/NOPB?
The 'E' in LM4132EMFX-3.3/NOPB indicates the device is manufactured to the E-grade specification: ±0.5% initial output voltage accuracy and 30 ppm/°C max temperature coefficient over –40°C to +125°C. This contrasts with the A-grade (±0.05%, 10 ppm/°C) offered in other variants. The 'E' grade provides cost-optimized performance for applications where moderate precision suffices - a defining characteristic of this specific LM4132EMFX-3.3/NOPB unit.
LM4132EMFX-3.3/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 30ppm/°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
LM4132EMFX-3.3/NOPB FAQ
1.How can I place an order for LM4132EMFX-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132EMFX-3.3/NOPB 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 LM4132EMFX-3.3/NOPB reliable?
The price and inventory of LM4132EMFX-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132EMFX-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM4132EMFX-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132EMFX-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132EMFX-3.3/NOPB?
LM4132EMFX-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132EMFX-3.3/NOPB 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 LM4132EMFX-3.3/NOPB?
For technical support, including LM4132EMFX-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132EMFX-3.3/NOPB requirements.
6.How does Aetrix verify that LM4132EMFX-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4132EMFX-3.3/NOPB 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 LM4132EMFX-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM4132EMFX-3.3/NOPB?
All LM4132EMFX-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4132EMFX-3.3/NOPB, 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 LM4132EMFX-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM4132EMFX-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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