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Texas Instruments LM4132EMFX-2.5
- Part No.:
- LM4132EMFX-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132EMFX-2.5.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,140
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Product details
Overview
LM4132EMFX-2.5 from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 2.5 V output with ±0.05% initial accuracy (Grade A), 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current - enabling high-accuracy ADC/DAC biasing in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4132EMFX-2.5 datasheet, LM4132EMFX-2.5 pinout, LM4132EMFX-2.5 application, or LM4132EMFX-2.5 equivalent, key selection considerations include its SOT-23-5 package, enable-controlled 3 µA shutdown mode, 20 mA output drive capability, dropout voltage as low as 175 mV at 10 mA, and stability with low-ESR ceramic capacitors without requiring an output buffer.
Technical Context
The LM4132EMFX-2.5 implements a CMOS band-gap architecture with EEPROM-based curvature, tempco, and accuracy correction - overcoming plastic-package assembly shifts that limit laser-trimmed bipolar references. It operates as a series reference, eliminating idle load current waste inherent in shunt topologies.
Its enable pin supports active-high logic control (VIH ≥ 65% VIN), allowing precise power sequencing in multi-rail systems. The device maintains regulation over input voltages from (VREF + 400 mV) = 2.9 V up to 5.5 V and sustains 2.5 V output across –40°C to +125°C ambient with ≤20 ppm/°C tempco (Grade A, full range).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.05% (Grade A, 25°C); enables 16-bit ADC reference with <±0.8 LSB error at 2.5 V full scale |
| Tempco | 10 ppm/°C (0°C to 85°C); contributes ≤±0.21 mV drift over industrial temperature range |
| Quiescent Current | 60 µA typical; allows >1-year battery life in 10 µA sleep-mode systems using coin cells |
| Dropout Voltage | 175 mV at 10 mA load; supports operation from single 3.3 V rail with 0.825 V headroom margin |
| Output Noise (0.1–10 Hz) | 240 µVPP; meets noise budget for 14-bit precision measurement front-ends |
| Enable Threshold | VIL ≤ 35% VIN, VIH ≥ 65% VIN; ensures robust logic-level compatibility with 1.8 V/3.3 V microcontrollers |
| Load Drive | 20 mA max; directly powers SAR ADC reference inputs and op-amp bias networks without external buffers |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected; no internal connection or function |
| 2 - GND | Analog ground reference | Primary return path for reference output and internal band-gap core; requires low-impedance PCB plane |
| 3 - EN | Enable control input | Active-high digital input; pulls output to high-impedance state when low, reducing supply current to 3 µA |
| 4 - VIN | Input supply | Accepts 2.9 V to 5.5 V; must be decoupled with ≥1 µF ceramic capacitor (CIN) close to pin |
| 5 - VREF | Precision reference output | 2.5 V regulated output; capable of sourcing up to 20 mA; stable with optional COUT (0.1 µF ceramic) |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed accuracy | 0.05% initial tolerance achieved via post-assembly calibration - eliminates laser-trimming yield loss in plastic packages |
| Low-tempco curvature correction | 10 ppm/°C (0°C–85°C) enabled by on-die EEPROM compensation of band-gap nonlinearity |
| Ultra-low quiescent current | 60 µA operating / 3 µA shutdown - extends runtime in energy-constrained IoT sensor nodes |
| Capacitor-free stability | Stable with only input capacitor (CIN); no mandatory output capacitor reduces BOM count and board area |
| High output drive | 20 mA source capability - eliminates need for external buffer op-amps in DAC reference applications |
| Automotive qualification option | LM4132-Q1 variant available AEC-Q100 Grade 1 (–40°C to +125°C) - not applicable to LM4132EMFX-2.5 |
Applications
| Portable Data Loggers | Industrial PLC Analog Input Modules |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 1-second intervals. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for 16-bit sigma-delta ADC converting sensor signals. Use Value: 10 ppm/°C tempco and 240 µVPP low-frequency noise ensure <±0.02% measurement accuracy across –20°C to +70°C field operation. |
Use Scenario: DIN-rail mounted programmable logic controller acquiring 4–20 mA current loop signals from factory floor transmitters. IC Role / Device Role / Timing Role: Supplies precision reference for isolated 24-bit ADC measuring loop voltage drop across precision shunt resistor. Use Value: 0.05% initial accuracy and 50 ppm long-term stability (1000 hrs) maintain calibration integrity over 12-month maintenance cycles. |
| Medical Patient Monitoring Devices | Test & Measurement Equipment |
|
Use Scenario: Portable ECG monitor digitizing biopotential signals with low-noise front-end amplifiers and high-resolution ADC. IC Role / Device Role / Timing Role: Delivers clean 2.5 V reference to ADC and analog signal chain bias networks. Use Value: 240 µVPP (0.1–10 Hz) noise and 20 mA drive eliminate external filtering/buffering, reducing component count and layout complexity. |
Use Scenario: Benchtop multimeter performing 6½-digit DC voltage measurements with auto-ranging and calibration routines. IC Role / Device Role / Timing Role: Serves as primary reference for internal DAC-based calibration and ADC offset/gain correction. Use Value: Thermal hysteresis of 75 ppm and ±0.05% accuracy support traceable metrology-grade calibration without frequent re-zeroing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | Fixed 2.5 V, 50 ppm/°C max tempco, 50 µA IQ, SOT-23-3, no enable pin | Lacks shutdown control and has higher tempco; suited for space-constrained, always-on reference needs | Select when enable functionality is unnecessary and lower quiescent current is prioritized over tempco |
| ADR3425ARJZ-R7 | 2.5 V, 10 ppm/°C max tempco, 120 µA IQ, SOT-23-5, no enable pin | Higher supply current and no enable; offers better PSRR (−80 dB @ 1 kHz) but no shutdown mode | Prefer for noise-sensitive applications where PSRR matters more than power savings or sequencing control |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4132EMFX-2.5 uniquely combines Grade A accuracy, ultra-low tempco, enable control, and 20 mA drive in a 5-pin SOT-23 - making it optimal for battery-powered, high-precision systems requiring dynamic power management and direct load driving.
Availability
LM4132EMFX-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and medical monitoring systems requiring stable component supply, tight initial accuracy, and long-term calibration retention.
Supply support for LM4132EMFX-2.5 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 reference performance using cost-effective CMOS+EEPROM trimming - targeting high-accuracy, low-power, and space-constrained applications in test equipment, medical devices, and portable instrumentation.
FAQ
What is the maximum load current supported by the LM4132EMFX-2.5?
The LM4132EMFX-2.5 supports up to 20 mA of continuous output current while maintaining regulation within specifications. This allows direct driving of ADC reference inputs, op-amp bias networks, or small logic loads without external buffering - verified across –40°C to +125°C ambient temperature and input voltages from 2.9 V to 5.5 V. Exceeding 20 mA may cause output voltage deviation beyond the 0.5% accuracy band.
Does the LM4132EMFX-2.5 require an output capacitor for stability?
No, the LM4132EMFX-2.5 is internally compensated and stable with no output capacitor required. A 0.1 µF ceramic capacitor (COUT) may be added externally to further reduce high-frequency noise, but it is optional. Only the input capacitor (CIN ≥ 1 µF ceramic) is mandatory for proper transient response and input supply rejection.
What is the dropout voltage specification for the LM4132EMFX-2.5 at 10 mA load?
The dropout voltage for the LM4132EMFX-2.5 is 175 mV (typical) at 10 mA load and 25°C, defined as the minimum VIN–VREF differential needed to maintain output regulation within 0.5% of nominal 2.5 V. Over temperature (–40°C to +125°C), the maximum dropout is specified as 400 mV - enabling reliable operation from a 3.3 V rail down to ~2.9 V input.
How does the enable pin of the LM4132EMFX-2.5 function?
The EN pin on the LM4132EMFX-2.5 is an active-high digital control input. When pulled high to ≥65% of VIN, the device operates normally; when pulled low to ≤35% of VIN, it enters shutdown mode drawing only 3 µA (typical). The pin has no internal pull-up/down and must be driven actively - compatible with standard GPIO outputs from 1.8 V or 3.3 V microcontrollers.
Is the LM4132EMFX-2.5 qualified for automotive applications?
No, the LM4132EMFX-2.5 is not automotive-qualified. It belongs to the commercial-grade LM4132 series. For automotive use, TI offers the LM4132-Q1 variant (e.g., LM4132QEMFX-2.5), which is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient) and undergoes additional stress testing - but this qualification does not extend to the standard LM4132EMFX-2.5 part number.
LM4132EMFX-2.5 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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 240µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.9V ~ 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-2.5 FAQ
1.How can I place an order for LM4132EMFX-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132EMFX-2.5 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-2.5 reliable?
The price and inventory of LM4132EMFX-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132EMFX-2.5 is usually 5 days.
3.What payment methods are accepted for LM4132EMFX-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132EMFX-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132EMFX-2.5?
LM4132EMFX-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132EMFX-2.5 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-2.5?
For technical support, including LM4132EMFX-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132EMFX-2.5 requirements.
6.How does Aetrix verify that LM4132EMFX-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4132EMFX-2.5 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-2.5 meets industry standards.
7.What is the process for return or replacement of LM4132EMFX-2.5?
All LM4132EMFX-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132EMFX-2.5, 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-2.5 part is unused and in its original packaging.
Return procedure for LM4132EMFX-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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