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Texas Instruments LM4132EMF-3.3
- Part No.:
- LM4132EMF-3.3
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132EMF-3.3.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,913
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Product details
Overview
LM4132EMF-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 (Grade A), 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 LM4132EMF-3.3 datasheet, LM4132EMF-3.3 pinout, LM4132EMF-3.3 application, or LM4132EMF-3.3 equivalent, key selection criteria include dropout voltage (175 mV at 10 mA), line regulation (85 ppm/V), load regulation (25 ppm/mA), thermal hysteresis (75 ppm), and SOT-23-5 package compatibility in space-constrained designs.
Technical Context
The LM4132EMF-3.3 uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar-level precision without laser trimming. Its curvature, tempco, and accuracy are corrected at package level to overcome assembly-induced shifts-enabling high accuracy despite plastic SOT-23 packaging.
It functions as a three-terminal series reference with active enable control, requiring only an input capacitor (CIN) and optionally an output capacitor (COUT). Unlike shunt references, it draws only 60 µA under load and avoids idle current waste, making it suitable for portable, low-power systems where supply headroom is limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V nominal, ±0.05% initial accuracy (Grade A) - ensures ADC/DAC reference stability within ±1.65 mV at 25°C |
| Tempco | 10 ppm/°C (0°C to 85°C) - contributes ≤0.825 mV drift over industrial temperature range |
| Dropout Voltage | 175 mV at 10 mA load - enables operation from 3.475 V input, critical for single-cell Li-ion or 3.3 V rail regulation |
| Quiescent Current | 60 µA typical - supports >1-year battery life in 10 µA-average-power IoT sensor nodes |
| Shutdown Current | 3 µA at EN = 0 V - reduces standby power by 20× versus active mode |
| Output Noise | 310 µVPP (0.1–10 Hz) - meets <1 LSB error for 16-bit 3.3 V full-scale SAR ADCs |
| Line Regulation | 85 ppm/V - induces ≤280 µV change per 1 V input variation, easing LDO pre-regulator design |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, surface-mount, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N/C | No-connect pin; must be left floating - no internal connection, avoids unintended coupling or leakage paths |
| 2 | GND | Analog ground reference - requires low-impedance PCB connection to minimize noise and offset errors |
| 3 | EN | Active-high enable input - drives high (>65% VIN) to activate; low (<35% VIN) to enter 3 µA shutdown |
| 4 | VIN | Input supply pin - accepts 3.475 V to 5.5 V; must be bypassed with ≥1 µF ceramic capacitor (CIN) |
| 5 | VREF | Precision 3.3 V output - capable of sourcing up to 20 mA; optional COUT improves transient response |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based curvature correction | Compensates die-package assembly shift in plastic SOT-23, enabling 0.05% accuracy unattainable with standard laser trimming |
| Enable-controlled shutdown | Reduces supply current from 60 µA to 3 µA - extends battery runtime in duty-cycled measurement systems |
| Capacitor-stable operation | Stable with low-ESR ceramic capacitors only; eliminates need for external buffer amplifier or tantalum output cap |
| Low dropout at full load | 175 mV dropout at 10 mA allows use with 3.475 V input - supports direct regulation from 3.6 V Li-ion cells |
| Automotive-grade option | LM4132-3.3-Q1 variant qualified to AEC-Q100 Grade 1 (–40°C to +125°C ambient) for under-hood applications |
Applications
| Portable Data Loggers | Industrial PLC Analog Inputs |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and pressure at 1-second intervals. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit SAR ADC, ensuring consistent full-scale definition across temperature and battery discharge. Use Value: 10 ppm/°C tempco and 310 µVPP low-frequency noise limit ADC quantization error to <0.5 LSB over –20°C to 70°C operating range. |
Use Scenario: Modular analog input card in programmable logic controller measuring 4–20 mA current loops and ±10 V signals. IC Role / Device Role / Timing Role: Precision reference for dual-slope or sigma-delta ADC front-end, referenced against isolated power rails. Use Value: 0.05% initial accuracy and 75 ppm thermal hysteresis ensure calibration validity over repeated thermal cycles in factory-floor environments. |
| Battery Management Systems | Medical Patient Monitors |
|
Use Scenario: Cell-voltage monitoring circuit in 3S lithium-ion pack, requiring accurate 3.3 V reference for ADC and comparator thresholds. IC Role / Device Role / Timing Role: Stable reference for voltage scaling and overvoltage protection comparators, enabled only during measurement bursts. Use Value: Enable pin reduces average current to <1 µA in sleep mode; 175 mV dropout permits operation down to 3.475 V input during deep discharge. |
Use Scenario: ECG signal conditioning module requiring ultra-low-noise, stable reference for gain-setting and ADC biasing. IC Role / Device Role / Timing Role: Low-noise 3.3 V reference for instrumentation amplifier common-mode setting and 24-bit delta-sigma ADC reference. Use Value: 310 µVPP (0.1–10 Hz) noise and 50 ppm long-term stability (1000 hrs) support clinical-grade baseline stability and repeatable diagnostics. |
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 (Grade A), 6 µA IQ, no enable pin, SOT-23-3 | Lacks enable control and has higher tempco; suited for always-on ultra-low-power apps where shutdown is unnecessary | Select when minimal quiescent current (6 µA) outweighs need for shutdown and tighter tempco |
| ADR3433ARJZ-R7 | 3.3 V, 10 ppm/°C max tempco, 120 µA IQ, no enable, SOT-23-5, ±0.1% initial accuracy | Higher supply current and looser initial accuracy; offers better PSRR (−80 dB @ 1 kHz) but no shutdown mode | Choose when superior power supply rejection is prioritized over low IQ and enable functionality |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, the LM4132EMF-3.3 uniquely combines 0.05% accuracy, 10 ppm/°C tempco, 60 µA IQ, and an enable pin in SOT-23-5-making it optimal for intermittently powered, high-accuracy systems where both precision and controllable power state are required.
Availability
LM4132EMF-3.3 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and battery management systems requiring stable component supply, guaranteed traceability, and long-term lifecycle support.
Supply support for LM4132EMF-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 company specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and signal chain solutions.
The LM4132 family was designed to deliver laser-trimmed reference performance using cost-effective, EEPROM-programmable CMOS technology-targeting high-accuracy, low-power, and space-constrained applications in industrial, medical, and portable equipment.
FAQ
What is the maximum load current supported by the LM4132EMF-3.3?
The LM4132EMF-3.3 supports up to 20 mA of continuous output current, verified across the full operating temperature range (–40°C to +125°C). This capability eliminates the need for external buffer amplifiers in most 12- to 16-bit data acquisition designs, directly driving ADC reference inputs, op-amp feedback networks, or low-power DACs without degradation in accuracy or stability.
Does the LM4132EMF-3.3 require an output capacitor for stability?
No, the LM4132EMF-3.3 is internally compensated and stable with or without an output capacitor. A 0.1 µF ceramic capacitor (COUT) may be added to improve transient response under dynamic load changes, but it is not required for loop stability-unlike many competing references that mandate minimum ESR or capacitance.
What is the purpose of Pin 1 (N/C) on the LM4132EMF-3.3?
Pin 1 of the LM4132EMF-3.3 is a no-connect (N/C) terminal with no internal connection. It must be left electrically floating-neither tied to GND nor VIN-to prevent parasitic coupling, leakage paths, or potential damage from ESD or voltage stress. This pin exists solely for mechanical symmetry in the SOT-23-5 package.
How does the enable pin (Pin 3) function on the LM4132EMF-3.3?
The enable pin (EN) on the LM4132EMF-3.3 is active-high with TTL-compatible thresholds: VIH ≥ 65% of VIN and VIL ≤ 35% of VIN. When pulled high, the device operates normally; when pulled low, it enters shutdown mode drawing only 3 µA. No external pull-up is required-EN can be driven directly from microcontroller GPIO or logic gates.
Is the LM4132EMF-3.3 suitable for automotive applications?
The LM4132EMF-3.3 is the commercial-grade version (non-Q1) and is not AEC-Q100 qualified. For automotive use, TI offers the LM4132-3.3-Q1 variant (e.g., LM4132Q3.3EDBVRQ1), which is qualified to AEC-Q100 Grade 1 (–40°C to +125°C ambient) and includes enhanced ESD robustness and process controls-LM4132EMF-3.3 itself is intended for industrial and portable equipment.
LM4132EMF-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:
- ±0.5%
- 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
LM4132EMF-3.3 FAQ
1.How can I place an order for LM4132EMF-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132EMF-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 LM4132EMF-3.3 reliable?
The price and inventory of LM4132EMF-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 LM4132EMF-3.3 is usually 5 days.
3.What payment methods are accepted for LM4132EMF-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132EMF-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132EMF-3.3?
LM4132EMF-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132EMF-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 LM4132EMF-3.3?
For technical support, including LM4132EMF-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132EMF-3.3 requirements.
6.How does Aetrix verify that LM4132EMF-3.3 is sourced from the original manufacturer or authorized distributors?
All LM4132EMF-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 LM4132EMF-3.3 meets industry standards.
7.What is the process for return or replacement of LM4132EMF-3.3?
All LM4132EMF-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132EMF-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 LM4132EMF-3.3 part is unused and in its original packaging.
Return procedure for LM4132EMF-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132EMF-3.3 Tags
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