Analog Devices Inc. LTC2401CMS#PBF

Overview

LTC2401CMS#PBF from Analog Devices (formerly Linear Technology) is a 1-channel, 24-bit micropower delta-sigma ADC in MSOP-10 package, featuring no-latency digital filtering, 4ppm INL, 0.6ppm RMS noise, and single-cycle settling for multiplexed sensor interfaces. It operates from 2.7V to 5.5V, supports pseudo-differential bridge digitization, and is used in precision weight scales and direct temperature measurement systems.

For engineers reviewing the LTC2401CMS#PBF datasheet, LTC2401CMS#PBF pinout, LTC2401CMS#PBF application, or LTC2401CMS#PBF equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, confirmed alternative parts with documented differences, and supply-ready availability details - all grounded in the official LTC2401/LTC2402 datasheet Rev. D.

Technical Context

The LTC2401CMS#PBF implements a proprietary no-latency ∆Σ architecture with an integrated decimating FIR filter that settles in one conversion cycle, eliminating traditional group delay and enabling true time-aligned sampling in multiplexed sensor arrays. Its internal oscillator eliminates external timing components while delivering ≥110dB rejection at 50Hz or 60Hz ±2% via FO pin configuration.

It uses automatic per-conversion zero-scale and full-scale calibration to maintain stability against temperature drift, supply variation, and aging - achieving 0.5ppm offset error and 4ppm full-scale error over temperature. Input range extends from –12.5% VREF to +112.5% VREF (VREF = FSSET – ZSSET), accommodating sensor offset and overrange without external signal conditioning.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MS10), 3mm × 3mm × 1.1mm profile, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution sigma-delta ADC applications.

Compared with ADS124S08IPWR and MAX11200EEE+, the LTC2401CMS#PBF uniquely combines 5V operation, –12.5% to +112.5% input range, and ≥110dB 50/60Hz rejection in a 10-pin MSOP - making it the only drop-in option for legacy 5V industrial sensor nodes requiring zero hardware redesign.

Availability

LTC2401CMS#PBF is available at Aetrix Electronics and suitable for weight scales, direct temperature measurement systems, and gas analyzers requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long production lifecycles.

Supply support for LTC2401CMS#PBF 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

Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2401CMS#PBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy sensor digitization in environments where mains interference, thermal drift, and board space are critical constraints.

FAQ

What is the maximum recommended reference voltage for the LTC2401CMS#PBF?

The LTC2401CMS#PBF supports reference voltages from 0.1V to VCC. For optimal INL performance and noise floor, Analog Devices recommends using VREF between 2.5V and 5V. At VREF = 5V, the device achieves 4ppm INL and 0.6ppm RMS noise; using VREF < 1V increases relative INL error and does not improve effective resolution due to fixed front-end thermal noise.

Does the LTC2401CMS#PBF require external passive components for its internal oscillator?

No, the LTC2401CMS#PBF requires no external passive components for its internal oscillator. The oscillator is fully integrated and factory-trimmed; connecting FO to VCC or GND selects 50Hz or 60Hz notch filtering respectively, with no crystals, capacitors, or resistors needed - a key differentiator from competing 24-bit ADCs like the ADS124S08.

How does the LTC2401CMS#PBF handle input signals outside its nominal range?

The LTC2401CMS#PBF supports an extended input range of –12.5% VREF to +112.5% VREF. Inputs beyond this range are clamped: voltages below –12.5% VREF output the minimum code (00000H), and voltages above +112.5% VREF output the maximum code (FFFFFH). This prevents data loss during sensor overrange events without saturating the digital backend.

Can the LTC2401CMS#PBF interface directly with a standard SPI controller?

Yes, the LTC2401CMS#PBF supports standard 3-wire SPI and MICROWIRE protocols. When SCK is held high at power-up, it enters internal-clock mode (SCK becomes output); when SCK is low, it enters external-clock mode (SCK becomes input). No configuration registers are needed - data is read synchronously on SCK falling edges, with EOC bit available on first rising edge.

What is the purpose of the FSSET and ZSSET pins on the LTC2401CMS#PBF?

The FSSET and ZSSET pins define the full-scale and zero-scale reference points for the LTC2401CMS#PBF's input range. VREF equals FSSET minus ZSSET. Setting FSSET = 2.5V and ZSSET = 0V yields VREF = 2.5V and an input range of –0.3125V to +2.8125V. This ratiometric configuration enables direct connection to bridge sensors without external gain or level-shifting circuitry.