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Texas Instruments LM4132AMFX-2.5/NOPB
- Part No.:
- LM4132AMFX-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132AMFX-2.5/NOPB.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
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Product details
Overview
LM4132AMFX-2.5/NOPB 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, 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current. It features an enable pin for 3 µA shutdown mode, supports up to 20 mA load current, and operates with input voltages as low as VREF + 400 mV - enabling use in battery-powered instrumentation and high-resolution ADC/DAC biasing.
For engineers reviewing the LM4132AMFX-2.5/NOPB datasheet, LM4132AMFX-2.5/NOPB pinout, LM4132AMFX-2.5/NOPB application, or LM4132AMFX-2.5/NOPB equivalent, key selection criteria include initial accuracy grade (A), dropout voltage at 10 mA (175 mV), 0.1–10 Hz noise (240 µVPP), and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4132AMFX-2.5/NOPB implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision without laser trimming. Its internal circuitry eliminates the need for an output capacitor or buffer amplifier while maintaining stability with low-ESR ceramic capacitors.
This device operates as a series reference, drawing only 60 µA supply current and achieving 400 mV maximum dropout across –40°C to +125°C. The enable pin controls transition between active (60 µA) and shutdown (3 µA) modes, with VIH/VIL thresholds defined as 65%/35% of VIN - supporting direct interfacing with 3.3 V or 5 V logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.05% (A-grade initial accuracy at 25°C) |
| Tempco | 10 ppm/°C (0°C to 85°C); enables <100 ppm total drift over industrial range |
| Dropout Voltage | 175 mV at 10 mA load; allows operation from 2.675 V input in battery systems |
| Supply Current | 60 µA typical (active), 3 µA max (shutdown); extends battery life in portable equipment |
| Noise (0.1–10 Hz) | 240 µVPP; suitable for 16-bit+ data acquisition without external filtering |
| Load Current | 20 mA max; drives ADC references, op-amp bias networks, and DACs directly |
| Line Regulation | 50 ppm/V (VREF + 400 mV to 5.5 V); minimizes output shift during supply ripple |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected; no internal bond or function |
| 2 - GND | Analog ground reference | Primary return path for reference output and internal circuitry; requires low-impedance PCB connection |
| 3 - EN | Enable control input | Active-high logic input; ≥65% VIN activates, ≤35% VIN disables; supports microcontroller GPIO control |
| 4 - VIN | Input supply | Accepts 2.9 V to 5.5 V; minimum headroom = VREF + 400 mV for regulation |
| 5 - VREF | Precision output | 2.5 V reference source; capable of sourcing/sinking up to ±20 mA with <0.5% error |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed CMOS band-gap | Enables A-grade 0.05% accuracy and 10 ppm/°C tempco without laser trimming or post-assembly calibration |
| Capacitor-free stability | Operates stably with no output capacitor required - reduces BOM count and board area in compact designs |
| Low-dropout operation | 175 mV dropout at 10 mA enables use with single-cell Li-ion (3.0–3.6 V) or two-cell alkaline supplies |
| Enable-controlled shutdown | Reduces supply current to 3 µA max, ideal for duty-cycled sensors and intermittent measurement systems |
| Automotive-qualified option | LM4132-Q1 variant available; this LM4132AMFX-2.5/NOPB is commercial-grade but shares identical pinout and electrical behavior |
Applications
| Portable Data Loggers | Industrial PLC Analog Inputs |
|---|---|
|
Use Scenario: Battery-powered environmental sensor nodes measuring temperature, humidity, and pressure with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for ADC conversion and sensor excitation circuits. Use Value: 240 µVPP low-frequency noise and 10 ppm/°C tempco ensure <±0.01% full-scale error over –20°C to +70°C operating range. |
Use Scenario: Modular I/O modules in programmable logic controllers requiring precise analog signal conditioning. IC Role / Device Role / Timing Role: Supplies reference voltage for 24-bit delta-sigma ADC front-ends and isolated current-loop transmitters. Use Value: 20 mA drive capability eliminates external buffers; 60 µA quiescent current supports low-power standby modes. |
| Medical Patient Monitors | Test & Measurement Equipment |
|
Use Scenario: Portable ECG and pulse oximetry devices requiring high-accuracy biopotential signal digitization. IC Role / Device Role / Timing Role: Reference source for low-noise instrumentation amplifiers and anti-aliasing filter biasing. Use Value: 0.05% initial accuracy and 50 ppm/V line regulation maintain calibration integrity despite battery voltage sag. |
Use Scenario: Benchtop multimeters and automated test equipment performing DC voltage measurements with 100 µV resolution. IC Role / Device Role / Timing Role: Primary reference for internal DACs, calibration routines, and autoranging circuitry. Use Value: Long-term stability of 50 ppm/1000 hrs and thermal hysteresis of 75 ppm support traceable metrology-grade performance. |
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 tempco, 50 µA IQ, SOT-23-3, no enable pin | Lacks shutdown control; lower drive (10 mA); simpler layout but less flexible power management | Choose when minimal footprint and ultra-low IQ are prioritized over enable control and 20 mA drive |
| ADR3425ARJZ-R7 | 2.5 V, 10 ppm/°C, 120 µA IQ, SOT-23-5, no enable, higher noise (35 µVRMS) | Higher supply current and noise; optimized for low-drift rather than low-power operation | Prefer when long-term stability (<15 ppm/1000 hrs) and tighter tempco over full temperature range are critical |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4132AMFX-2.5/NOPB uniquely combines A-grade accuracy, enable functionality, 20 mA drive, and capacitor-free stability - making it optimal for portable, battery-sensitive, and high-channel-count systems where both precision and power-state control are required.
Availability
LM4132AMFX-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC analog inputs, and medical patient monitors requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4132AMFX-2.5/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 LM4132AMFX-2.5/NOPB belongs to TI's precision voltage reference product line, engineered for high-accuracy data acquisition, sensor signal chains, and battery-powered measurement systems demanding low drift, low noise, and low power.
FAQ
What is the maximum input voltage for the LM4132AMFX-2.5/NOPB?
The LM4132AMFX-2.5/NOPB supports a maximum input voltage of 5.5 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable regulation, VIN must remain within VREF + 400 mV (i.e., ≥2.9 V) and ≤5.5 V across all temperatures and load conditions.
Does the LM4132AMFX-2.5/NOPB require an output capacitor?
No, the LM4132AMFX-2.5/NOPB is designed to operate stably without an output capacitor - a key differentiator from many LDO references. The datasheet explicitly states COUT is optional, and typical applications omit it unless additional noise filtering is needed for specific system requirements.
What is the shutdown current of the LM4132AMFX-2.5/NOPB?
The LM4132AMFX-2.5/NOPB draws a maximum of 3 µA in shutdown mode when the EN pin is held at ≤35% of VIN. At –40°C to +125°C, the worst-case shutdown current remains ≤7 µA, enabling multi-year battery life in intermittently powered sensor nodes.
Is the LM4132AMFX-2.5/NOPB pin-compatible with automotive-grade variants?
Yes - the LM4132AMFX-2.5/NOPB shares identical SOT-23-5 pinout, electrical characteristics, and functional behavior with the LM4132Q1-2.5 variants. The only differences are qualification level (AEC-Q100 Grade 1 for Q1) and screening; no PCB redesign is needed when upgrading to automotive versions.
What load current can the LM4132AMFX-2.5/NOPB deliver while maintaining accuracy?
The LM4132AMFX-2.5/NOPB delivers up to 20 mA output current while maintaining its specified 0.5% output voltage accuracy. Load regulation is characterized at 25 ppm/mA (0–20 mA), meaning output deviation remains ≤500 µV under full load - sufficient for driving ADC references and op-amp bias networks directly.
LM4132AMFX-2.5/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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 20ppm/°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
LM4132AMFX-2.5/NOPB FAQ
1.How can I place an order for LM4132AMFX-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132AMFX-2.5/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 LM4132AMFX-2.5/NOPB reliable?
The price and inventory of LM4132AMFX-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132AMFX-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4132AMFX-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132AMFX-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132AMFX-2.5/NOPB?
LM4132AMFX-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132AMFX-2.5/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 LM4132AMFX-2.5/NOPB?
For technical support, including LM4132AMFX-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132AMFX-2.5/NOPB requirements.
6.How does Aetrix verify that LM4132AMFX-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4132AMFX-2.5/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 LM4132AMFX-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4132AMFX-2.5/NOPB?
All LM4132AMFX-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4132AMFX-2.5/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 LM4132AMFX-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4132AMFX-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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