Analog Devices Inc./Maxim Integrated LM4040BIM3-3.0+T

Overview

LM4040BIM3-3.0+T from Maxim Integrated is a precision 3.000V two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% initial accuracy, ±100ppm/°C temperature coefficient, and 60μA–15mA operating current range. It delivers stable reverse-breakdown voltage for analog-to-digital converter (ADC) reference, portable battery-powered instrumentation, and industrial sensor signal conditioning circuits.

For engineers reviewing the LM4040BIM3-3.0+T datasheet, LM4040BIM3-3.0+T pinout, LM4040BIM3-3.0+T application, or LM4040BIM3-3.0+T equivalent, key selection criteria include guaranteed -40°C to +85°C operation, no external capacitor requirement, low 45µVRMS wideband noise (10Hz–10kHz), and compatibility with capacitive loads in space-constrained designs.

Technical Context

The LM4040BIM3-3.0+T uses bandgap-based shunt regulation to maintain a precise 3.000V reverse breakdown voltage across its anode and cathode terminals. Its laser-trimmed internal resistor network ensures 0.2% initial tolerance at +25°C, with performance validated over full -40°C to +85°C industrial temperature range.

It operates without external stabilization capacitance and remains stable under any output capacitance load. Dynamic impedance is ≤0.8Ω at 1mA, enabling fast transient response and minimal voltage shift (<1.0mV) across 60μA–1mA current variation.

Key Specifications

Pinout & Package

LM4040BIM3-3.0+T is housed in a RoHS-compliant 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is internally unconnected (N.C.) and must be left floating or tied 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 ADR3430ARJZ-R7, the LM4040BIM3-3.0+T offers the optimal balance of fixed 3.000V accuracy, ultra-low 60μA operating current, SC70-3 size, and zero external component count - making it the preferred choice for space- and power-constrained shunt reference implementations.

Availability

LM4040BIM3-3.0+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor signal chains, medical wearables, and automotive body control modules requiring stable component supply and long-term parametric consistency.

Supply support for LM4040BIM3-3.0+T 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 and mixed-signal ICs for industrial, medical, and communications applications, with emphasis on high-performance, low-power solutions.

The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems where stability, small size, and zero external components are essential.

FAQ

What is the guaranteed operating temperature range for LM4040BIM3-3.0+T?

The LM4040BIM3-3.0+T is specified and guaranteed over -40°C to +85°C. This industrial temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official Maxim Integrated datasheet. The "I" suffix in the part number denotes this grade, distinguishing it from the extended-range "E" versions rated to +125°C.

Can LM4040BIM3-3.0+T be used without an external capacitor?

Yes, the LM4040BIM3-3.0+T does not require an external output capacitor and remains stable with any capacitive load. This is explicitly stated in the General Description and Applications Information sections of the datasheet, eliminating design risk and BOM cost associated with capacitor selection, aging, and PCB layout sensitivity.

What is the minimum shunt current required for LM4040BIM3-3.0+T to regulate properly?

The LM4040BIM3-3.0+T requires a minimum shunt current of 67μA across the full -40°C to +85°C temperature range, as specified in the Electrical Characteristics table for the 3.000V variant. At +25°C, typical minimum current is 45μA, but 67μA must be maintained under worst-case conditions to ensure regulation integrity.

How does the pin configuration of LM4040BIM3-3.0+T differ from standard 3-pin voltage references?

The LM4040BIM3-3.0+T has a nonstandard pinout: Pin 1 is Anode (+), Pin 2 is Cathode (–), and Pin 3 is No Connection (N.C.). Unlike most 3-pin references, Pin 3 must be left unconnected or tied to Pin 2 - it is not a voltage adjust or enable pin. This is clearly shown in the Pin Configuration diagram and Pin Description table on page 12 of the datasheet.

Is LM4040BIM3-3.0+T RoHS-compliant and lead-free?

Yes, the "+T" suffix in LM4040BIM3-3.0+T indicates a lead(Pb)-free and RoHS-compliant package, as explicitly noted in the Ordering Information table footnote. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for SC70-3 packaging and is compatible with standard reflow soldering profiles up to +260°C.