Diodes Incorporated LM4041DH5TA

Overview

LM4041DH5TA from Diodes Incorporated is a precision 1.225 V shunt voltage reference in SC70-5 package, rated at ±1% initial tolerance (D grade), 20 ppm/°C max temperature coefficient, and operating over -40°C to +125°C with 60 µA to 12 mA supply current. It serves as a stable, low-noise (20 µV_RMS) reference in space-constrained analog signal chains and battery-powered systems.

For engineers reviewing the LM4041DH5TA datasheet, LM4041DH5TA pinout, LM4041DH5TA application, or LM4041DH5TA equivalent, key selection criteria include output stability under capacitive load, minimum operating current (65 µA), dynamic impedance (<2 Ω at 1 mA), long-term drift (120 ppm/1000 hrs), and AEC-Q100 Grade 1 qualification for automotive-grade reliability.

Technical Context

The LM4041DH5TA implements a bandgap-based shunt topology with internal curvature compensation, enabling stable 1.225 V reference voltage across wide current (60 µA–12 mA) and temperature (-40°C to +125°C) ranges. Its design eliminates need for external output capacitance while maintaining <2 Ω dynamic impedance at 1 mA and 120 Hz.

Pin configuration reflects SC70-5 mechanical layout: Pin 1 = ANODE, Pin 2 = CATHODE (die-attached, must float or tie to Pin 1), Pin 3 = N/C, Pin 4 = N/C, Pin 5 = REF. This terminal mapping ensures correct biasing and avoids parasitic conduction paths in PCB layout.

Key Specifications

Pinout & Package

LM4041DH5TA uses the SC70-5 surface-mount package (2.0 mm × 1.25 mm × 0.9 mm), optimized for high-density PCB layouts. Die attachment to Pin 2 mandates that Pin 2 be left floating or connected to Pin 1 to prevent unintended conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4041DH5TA offers optimal balance of fixed 1.225 V output, SC70-5 size, AEC-Q100 Grade 1 rating, and micro-power operation-making it uniquely suited for space- and reliability-critical embedded sensing.

Availability

LM4041DH5TA is available at Aetrix Electronics and suitable for battery-powered medical sensors, precision industrial data loggers, and automotive cabin temperature modules requiring stable component supply with guaranteed long-term availability.

Supply support for LM4041DH5TA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The LM4041 series belongs to Diodes' precision analog portfolio, engineered specifically for low-power, high-stability voltage referencing in portable, automotive, and industrial systems where size, accuracy, and reliability are critical.

FAQ

What is the correct PCB layout for LM4041DH5TA's Pin 2?

Pin 2 is die-attached in the SC70-5 package and must be left electrically floating or connected directly to Pin 1 (ANODE) on the PCB. Failure to do so creates an unintended current path that degrades regulation accuracy and increases temperature sensitivity. No trace should route Pin 2 to any other net.

Can LM4041DH5TA drive a 10 nF capacitive load without oscillation?

Yes - the LM4041DH5TA is explicitly designed for unconditional stability with capacitive loads up to at least 1 µF, per Diodes' datasheet Figure 5 (Output Impedance vs. Frequency). A 10 nF load falls well within this margin and requires no series resistance or isolation.

Does LM4041DH5TA require a minimum cathode-to-anode voltage to regulate?

Yes - regulation begins when cathode-to-anode voltage exceeds 1.225 V by ≥10 mV, and stable operation requires reverse current ≥60 µA. Below this current, output voltage sags nonlinearly; the device does not regulate at zero-load or open-circuit conditions.

Is LM4041DH5TA compatible with lead-free reflow profiles?

Yes - the SC70-5 package is rated for standard JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260°C for 30 seconds. The device's maximum junction temperature (155°C) and thermal resistance (θ_JA = 420°C/W) are validated under these conditions.