Texas Instruments LM4132EMFX-4.1/NOPB

Overview

LM4132EMFX-4.1/NOPB from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 4.096 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 and supports up to 20 mA load current - ideal for high-resolution ADC/DAC biasing in portable instrumentation and automotive sensor modules.

For engineers reviewing the LM4132EMFX-4.1/NOPB datasheet, LM4132EMFX-4.1/NOPB pinout, LM4132EMFX-4.1/NOPB application, or LM4132EMFX-4.1/NOPB equivalent, key selection criteria include dropout voltage (175 mV at 10 mA), line regulation (100 ppm/V), long-term stability (50 ppm over 1000 hrs), and SOT-23-5 package compatibility with space-constrained PCB layouts.

Technical Context

The LM4132EMFX-4.1/NOPB 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 mitigate assembly-induced shifts - enabling consistent 4.096 V output across temperature (–40°C to +125°C) and load (0–20 mA).

This device operates as a series reference with VIN range from VREF + 400 mV (4.496 V) to 5.5 V, requires only a mandatory input capacitor (CIN), and functions stably with low-ESR ceramic capacitors - eliminating need for output buffer or COUT in most applications.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 1.0 mm max height, gull-wing leads. RoHS-compliant, lead-free, and qualified per AEC-Q100 Grade 1 (–40°C to +125°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with REF3340AIDBVR and ADR3440ARJZ-R7, the LM4132EMFX-4.1/NOPB uniquely combines A-grade 0.05% accuracy, 10 ppm/°C tempco, enable-controlled shutdown, and 20 mA drive in a standard SOT-23-5 - making it optimal for high-fidelity, power-aware, and thermally demanding applications.

Availability

LM4132EMFX-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial PLC analog inputs requiring stable component supply with guaranteed long-term parametric consistency and AEC-Q100 compliance.

Supply support for LM4132EMFX-4.1/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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and automotive-qualified components.

The LM4132 family was engineered to deliver laser-trimmed performance in cost-effective CMOS processes - targeting high-accuracy data acquisition, test equipment, and safety-critical automotive subsystems where stability, low drift, and small footprint are mandatory.

FAQ

What is the maximum input voltage for the LM4132EMFX-4.1/NOPB?

The LM4132EMFX-4.1/NOPB supports a maximum input voltage of 5.5 V across its specified operating temperature range. Exceeding this voltage may cause permanent damage, as defined in the Absolute Maximum Ratings table. The minimum input is VREF + 400 mV (4.496 V) to maintain regulation at 10 mA load - ensuring reliable operation from common 4.5 V or 5 V rails.

Does the LM4132EMFX-4.1/NOPB require an output capacitor (COUT)?

No, the LM4132EMFX-4.1/NOPB is designed to be stable without an output capacitor - a key differentiator from many competing references. While COUT is optional and can improve transient response under fast load steps, it is not required for stability. Only the input capacitor (CIN) is mandatory and must be ≥1 µF ceramic with low ESR.

What does the 'E' grade signify in LM4132EMFX-4.1/NOPB?

The 'E' in LM4132EMFX-4.1/NOPB denotes the device grade - specifically, the LM4132E-4.1 variant with 0.5% initial output voltage accuracy and 30 ppm/°C temperature coefficient (–40°C to +125°C). This contrasts with the 'A' grade (e.g., LM4132AMFX-4.1/NOPB), which offers 0.05% accuracy and 10 ppm/°C. The 'MFX' suffix indicates SOT-23-5 packaging and tape-and-reel delivery.

Can the LM4132EMFX-4.1/NOPB drive a 20 mA load continuously?

Yes, the LM4132EMFX-4.1/NOPB is rated for continuous 20 mA output current per the Recommended Operating Conditions table. At this load and 25°C, dropout remains 175 mV - meaning VIN must be ≥4.271 V. Thermal considerations apply: with RθJA = 164.1°C/W, power dissipation at 20 mA and 5 V input is ~62 mW, resulting in ~10°C junction rise above ambient - well within the 125°C TJMAX limit.

Is the LM4132EMFX-4.1/NOPB qualified for automotive applications?

Yes - the LM4132EMFX-4.1/NOPB is part of the LM4132-Q1 family and is AEC-Q100 qualified for Device Temperature Grade 1 (–40°C to +125°C ambient). It meets HBM ESD Class 2 (±2 kV) and is validated for automotive subsystems including cabin sensors, body control modules, and ADAS front-end signal conditioning where precision voltage referencing is mission-critical.