Analog Devices Inc. LTC2411-1CMS#PBF

Overview

LTC2411-1CMS#PBF from Analog Devices (formerly Linear Technology) is a 24-bit micropower delta-sigma analog-to-digital converter with differential input and reference, integrated oscillator, 0.29ppm RMS noise, 2ppm INL, and simultaneous 50Hz/60Hz rejection-designed for high-accuracy sensor digitization in weight scales and industrial process control.

For engineers reviewing the LTC2411-1CMS#PBF datasheet, LTC2411-1CMS#PBF pinout, LTC2411-1CMS#PBF application, or LTC2411-1CMS#PBF equivalent, key selection criteria include its 49Hz–61.2Hz notch rejection profile, MSOP-10 package, 2.7V–5.5V single-supply operation, 4µA sleep current, and SPI-compatible 3-wire interface without latency.

Technical Context

The LTC2411-1CMS#PBF implements a decimating FIR filter with internal oscillator configured for simultaneous 50Hz/60Hz line-frequency rejection (49Hz–61.2Hz range), achieving ≥87dB normal-mode rejection and ≥140dB DC common-mode rejection. Its autocalibration engine performs offset and full-scale correction every conversion cycle.

It operates in three deterministic states-conversion, sleep, and data output-with no filter settling delay. The 32-bit serial output is clocked via SCK (bidirectional) under CS control, supporting both internal and external clock modes without register programming.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MS10), 3mm × 3mm, 0.5mm pitch, JEDEC MO-187 variant. Thermal resistance θ_JA = 120°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 24-bit delta-sigma ADC applications.

Compared with ADS124S08IPW and MAX11206ETL+, the LTC2411-1CMS#PBF delivers unique plug-and-play 50/60Hz rejection without configuration overhead or external components-making it optimal for cost-sensitive, single-channel, low-power industrial sensors where layout simplicity and firmware minimalism are critical.

Availability

LTC2411-1CMS#PBF is available at Aetrix Electronics and suitable for weight scales, gas analyzers, and industrial process control systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for LTC2411-1CMS#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 LTC2411-1CMS#PBF belongs to ADI's legacy Linear Technology precision delta-sigma ADC family, engineered specifically for low-power, high-accuracy direct sensor digitization in harsh electrical environments-emphasizing ease of use, self-calibration, and robust line-frequency immunity.

FAQ

What is the primary function of the FO pin on the LTC2411-1CMS#PBF?

The FO (Frequency Control) pin on the LTC2411-1CMS#PBF configures the device's digital filter notch behavior. When tied to GND, it enables simultaneous 49Hz–61.2Hz rejection-this is the defining feature distinguishing the LTC2411-1CMS#PBF from the standard LTC2411. The LTC2411-1CMS#PBF does not require external components to achieve this rejection, as the internal oscillator and FIR filter are pre-tuned for global AC line frequencies.

Does the LTC2411-1CMS#PBF require external calibration components or registers to achieve 50Hz/60Hz rejection?

No, the LTC2411-1CMS#PBF achieves simultaneous 50Hz/60Hz rejection autonomously when the FO pin is connected to GND-no external capacitors, crystals, or register writes are needed. Its integrated oscillator and fixed FIR filter architecture deliver ≥87dB normal-mode rejection across 49Hz–61.2Hz out-of-the-box, eliminating design complexity associated with configuring notch filters in software or hardware.

How does the LTC2411-1CMS#PBF handle reference and input common-mode voltages?

The LTC2411-1CMS#PBF independently supports reference common-mode voltage (V_REFCM) and input common-mode voltage (V_VINCM) anywhere from GND to VCC. This allows REF– to be set above GND (e.g., 1.25V) while IN– is grounded-or vice versa-enabling direct interfacing with floating bridges, isolated sensors, or ratiometric configurations without op-amp level shifters. The IC maintains ≥140dB DC common-mode rejection across this full range.

What is the significance of "no latency" in the LTC2411-1CMS#PBF datasheet?

"No latency" means the LTC2411-1CMS#PBF's digital filter settles in a single conversion cycle-every 32-bit output corresponds exactly to the analog input sampled during that cycle, with no pipeline delay or redundant samples. This enables deterministic timing for multiplexed sensor systems, real-time control loops, and applications where input step response must be preserved without post-processing alignment.

Can the LTC2411-1CMS#PBF operate with a 3.3V supply and still meet its specified noise and linearity performance?

Yes, the LTC2411-1CMS#PBF is fully specified from 2.7V to 5.5V, including all key parameters: 0.29ppm RMS noise, 2ppm INL, and ≥87dB 49Hz–61.2Hz rejection are guaranteed at 3.3V operation. Electrical characteristics tables confirm performance across the entire voltage range, and typical performance curves (e.g., Figure G09, G12) show negligible degradation at 3.3V versus 5V-making it ideal for modern low-voltage industrial and portable designs.