Analog Devices Inc./Maxim Integrated LM4041DIX3-1.2

Overview

LM4041DIX3-1.2 from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SC70-3 package, featuring ±1.0% initial accuracy, 150ppm/°C max temperature coefficient, 60µA to 12mA operating current range, and 20µVRMS wideband noise (10Hz–10kHz). It delivers stable reference voltage for low-power analog signal conditioning in portable battery-powered systems.

For engineers reviewing the LM4041DIX3-1.2 datasheet, LM4041DIX3-1.2 pinout, LM4041DIX3-1.2 application, or LM4041DIX3-1.2 equivalent, key selection criteria include shunt current compliance, temperature drift over –40°C to +85°C, no-output-capacitor stability, SC70 footprint constraints, and grade-specific accuracy vs. cost trade-offs.

Technical Context

The LM4041DIX3-1.2 implements a bandgap-based shunt reference architecture with laser-trimmed resistors for factory calibration. Its internal BiCMOS process enables stable 1.225V reverse breakdown across 60µA–12mA cathode current without external stabilization capacitance.

It operates as a two-terminal device where pin 1 (+) and pin 2 (−) form the reference terminals, and pin 3 is NC (must float or tie to pin 2). Temperature performance is guaranteed over –40°C to +85°C with ±1.98% total overtemperature tolerance (±1.0% initial + 150ppm/°C × 65°C).

Key Specifications

Pinout & Package

LM4041DIX3-1.2 uses the 3-pin SC70-3 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3. Pin 3 must be left floating or connected to pin 2 per datasheet requirement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431ACDBVR and REF3012AIDBZR, the LM4041DIX3-1.2 offers the smallest footprint and simplest two-terminal interface for fixed 1.225V references, trading absolute accuracy and tempco for space savings and design simplicity in cost-sensitive portable systems.

Availability

LM4041DIX3-1.2 is available at Aetrix Electronics and suitable for portable medical sensors, notebook computer power monitoring, and industrial process transmitters requiring stable component supply with consistent SC70-3 packaging and traceable lot history.

Supply support for LM4041DIX3-1.2 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated systems where fixed 1.225V accuracy, low noise, and capacitor-free stability are critical.

FAQ

What is the guaranteed operating temperature range for LM4041DIX3-1.2?

The LM4041DIX3-1.2 is specified for continuous operation from –40°C to +85°C. All electrical parameters-including initial accuracy, temperature coefficient, and dynamic impedance-are guaranteed across this full industrial temperature range per the datasheet's Electrical Characteristics table and Absolute Maximum Ratings section.

Can LM4041DIX3-1.2 be used without an external output capacitor?

Yes, the LM4041DIX3-1.2 does not require an external output capacitor and remains stable with any capacitive load. This is confirmed in the General Description and Applications Information sections, which explicitly state "No Output Capacitors Required" and "Tolerates Capacitive Loads" as core features of the LM4041DIX3-1.2 design.

What is the function of pin 3 on LM4041DIX3-1.2?

Pin 3 of the LM4041DIX3-1.2 is labeled N.C. (No Connect) and must either be left floating or connected directly to pin 2 (cathode). The datasheet's Pin Description table and top-view diagram explicitly prohibit using pin 3 as an active terminal-its sole valid configurations are open-circuit or short-to-pin-2.

How does the 150ppm/°C temperature coefficient affect LM4041DIX3-1.2 accuracy over temperature?

The 150ppm/°C max temperature coefficient contributes up to ±1.98% additional error over the –40°C to +85°C range (±1.0% initial + 150ppm/°C × 65°C). This total overtemperature tolerance is documented in Note 2 of the Electrical Characteristics table and defines the worst-case deviation from nominal 1.225V across the full operating range.

Is LM4041DIX3-1.2 compatible with SOT23-3 PCB footprints?

No, the LM4041DIX3-1.2 uses the SC70-3 package (1.8mm × 1.8mm), which has different pad pitch and dimensions than SOT23-3 (2.9mm × 1.6mm). The datasheet explicitly states the SC70-3 is "50% smaller than comparable devices in SOT23 surface-mount packages," confirming mechanical incompatibility-separate PCB layout is required.