Texas Instruments LM4132EMF-4.1

Overview

LM4132EMF-4.1 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 (Grade A), 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current - used in high-resolution ADC/DAC biasing, portable instrumentation, and automotive sensor signal conditioning.

For engineers reviewing the LM4132EMF-4.1 datasheet, LM4132EMF-4.1 pinout, LM4132EMF-4.1 application, or LM4132EMF-4.1 equivalent, key selection criteria include dropout voltage (175 mV at 10 mA), enable-controlled shutdown (3 µA), load regulation (25 ppm/mA), stability with ceramic capacitors, and SOT-23-5 packaging for space-constrained PCBs.

Technical Context

The LM4132EMF-4.1 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision without laser trimming. It operates as a 3-terminal series reference with enable control, requiring only an input capacitor (CIN) and optionally an output capacitor (COUT).

It functions across –40°C to +125°C ambient, supports up to 20 mA output current, and maintains regulation with VIN as low as VREF + 400 mV (≥4.496 V). Its internal circuitry eliminates need for external buffer amplifiers or minimum load requirements.

Key Specifications

Pinout & Package

SOT-23-5 package (2.90 mm × 1.60 mm body), surface-mount, lead-free, RoHS-compliant.

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 LM4132EMF-4.1 uniquely combines Grade A accuracy (±0.05%), 10 ppm/°C tempco, enable-controlled shutdown (3 µA), and AEC-Q100 qualification - making it optimal for automotive and high-precision portable instrumentation where accuracy, thermal stability, and power-state control are jointly critical.

Availability

LM4132EMF-4.1 is available at Aetrix Electronics and suitable for high-resolution data acquisition, automotive sensor interfaces, and portable instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LM4132EMF-4.1 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 analog ICs and automotive-grade components.

The LM4132 family was designed for high-accuracy, low-power, space-constrained applications demanding laser-trimmed performance at CMOS cost - targeting instrumentation, automotive sensors, and portable test equipment.

FAQ

What is the output voltage tolerance of the LM4132EMF-4.1 over temperature?

The LM4132EMF-4.1 delivers 4.096 V with ±0.05% initial accuracy at 25°C. Over –40°C to +125°C, its maximum temperature coefficient is 20 ppm/°C, contributing ≤±0.82 mV drift. Combined with initial error and long-term stability (50 ppm/1000 hrs), total output variation remains within ±0.1% across full operating range - verified per TI's Electrical Characteristics table for LM4132-4.1.

Does the LM4132EMF-4.1 require an output capacitor for stability?

No, the LM4132EMF-4.1 is internally compensated and stable without an output capacitor. A 0.1 µF to 10 µF ceramic capacitor (COUT) may be added to reduce high-frequency noise or improve transient response, but it is optional per TI's datasheet Section 8.2. Only the input capacitor (CIN) is mandatory for EMI suppression and supply decoupling.

Can the LM4132EMF-4.1 drive a 10 kΩ load directly?

Yes. With a 20 mA maximum output current rating and 4.096 V output, the LM4132EMF-4.1 can drive a minimum load resistance of 204.8 Ω (4.096 V / 20 mA). A 10 kΩ load draws only 409.6 µA - well within specification - and introduces negligible error due to its 25 ppm/mA load regulation (≤±0.01 mV shift).

What is the minimum input voltage required for the LM4132EMF-4.1 to maintain regulation?

The LM4132EMF-4.1 requires VIN ≥ VREF + 400 mV for full-load operation, i.e., ≥4.496 V. At 10 mA load, its typical dropout is 175 mV (4.271 V min), but the datasheet specifies 400 mV worst-case dropout over temperature. Therefore, design for VIN ≥4.496 V to ensure regulation across –40°C to +125°C and process variation.

Is the LM4132EMF-4.1 pin-compatible with other LM4132 variants?

Yes - all LM4132 variants (e.g., LM4132AMF-2.5, LM4132CMF-3.3) share identical SOT-23-5 pinout (Pin 1: N/C, Pin 2: GND, Pin 3: EN, Pin 4: VIN, Pin 5: VREF). The LM4132EMF-4.1 uses the same mechanical and electrical interface, enabling drop-in replacement across voltage options when board layout accommodates the specific output requirement.