Texas Instruments LM4041BIDCKT

Overview

LM4041BIDCKT from Texas Instruments is a precision micropower shunt voltage reference in SC-70-5 package, delivering a fixed 1.225 V output with ±0.2% initial tolerance (B grade), 100 ppm/°C max temperature coefficient, 20 μV_RMS wideband noise, and stable operation from 45 μA to 12 mA cathode current. It serves as a low-drift, low-noise reference in high-accuracy analog signal chains and portable power monitors.

For engineers reviewing the LM4041BIDCKT datasheet, LM4041BIDCKT pinout, LM4041BIDCKT application, or LM4041BIDCKT equivalent, key selection criteria include its SC-70-5 footprint, adjustable/fixed configuration support, industrial temperature range (–40°C to +85°C), and compatibility with capacitive loads without external stabilization.

Technical Context

The LM4041BIDCKT implements a Zener-based shunt reference architecture trimmed via fuse and Zener-zap during wafer sort to achieve B-grade (±0.2%) output tolerance. Its feedback (FB) pin enables adjustable operation (1.225 V to 10 V) using an external resistor divider, while the fixed version uses internal trimming for 1.225 V nominal output.

It features low dynamic impedance (≤1.5 Ω at 1 mA), operates without mandatory output capacitance, and maintains stability across all capacitive loads. The SC-70-5 package includes dedicated FB, Cathode, Anode, and two NC pins - with Pin 2 (NC) requiring connection to Anode or floating per EMI mitigation guidance.

Key Specifications

Pinout & Package

LM4041BIDCKT is packaged in a 5-pin SC-70 (DCK) outline, measuring 2.0 mm × 1.25 mm × 0.9 mm, optimized for space-constrained PCB layouts. Pin 2 is a no-connect (NC) terminal that must be left floating or tied to Anode (Pin 1) per TI's EMI mitigation recommendation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM4041BIDCKT, LM4040BIM3-1.2 offers identical tolerance in a smaller 3-pin package but sacrifices adjustability and thermal stability, while MAX6002BAUT+T provides superior tempco at the cost of higher noise and non-interchangeable pin mapping - making LM4041BIDCKT optimal for compact, flexible, and thermally demanding shunt reference needs.

Availability

LM4041BIDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply, long-term calibration integrity, and industrial-temperature reliability.

Supply support for LM4041BIDCKT 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, embedded processing, and connectivity technologies, with decades of leadership in precision reference design.

The LM4041 product line delivers micropower shunt references optimized for accuracy, low noise, and ease of use in portable, industrial, and test equipment - eliminating external capacitors and supporting both fixed and adjustable configurations.

FAQ

What is the output voltage and tolerance of the LM4041BIDCKT?

The LM4041BIDCKT provides a fixed nominal output voltage of 1.225 V with a maximum initial tolerance of ±0.2% at 25°C (B grade). This tolerance is guaranteed over the full industrial temperature range (–40°C to +85°C), and the device maintains stability without requiring an output capacitor. The LM4041BIDCKT achieves this precision through on-wafer Zener-zap trimming.

Does the LM4041BIDCKT require an external output capacitor?

No, the LM4041BIDCKT does not require an external output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads, including zero capacitance. This eliminates the need for board space and BOM cost associated with bypass capacitors - a key advantage in ultra-compact and low-power designs where the LM4041BIDCKT is deployed.

Can the LM4041BIDCKT be used in adjustable mode?

Yes, the LM4041BIDCKT supports adjustable operation via its dedicated FB (Pin 5) terminal. When configured with an external resistor divider between Cathode and Anode, it can generate output voltages from 1.225 V to 10 V using the formula V_OUT = V_REF(1 + R2/R1). In fixed mode, it delivers 1.225 V without external components - offering design flexibility within the same LM4041BIDCKT footprint.

What is the operating current range of the LM4041BIDCKT?

The LM4041BIDCKT operates over a cathode current range of 45 μA (typical minimum) to 12 mA. Its micropower design enables reliable regulation down to sub-100 μA, making it ideal for battery-backed sensors and energy-harvesting systems. At the upper end, 12 mA supports robust performance in higher-current monitoring applications without derating.

What package type and pin count does the LM4041BIDCKT use?

The LM4041BIDCKT is housed in a 5-pin SC-70 (DCK) package measuring 2.0 mm × 1.25 mm. Its pinout comprises Anode (Pin 1), NC (Pin 2), Cathode (Pin 3), NC (Pin 4), and FB (Pin 5). Pin 2 must be left floating or tied to Anode per TI's EMI mitigation guidance - a requirement confirmed in the official LM4041 datasheet for the DCK variant.