Analog Devices Inc. LTC2404CG#TRPBF

Overview

LTC2404CG#TRPBF from Analog Devices (formerly Linear Technology) is a 4-channel, 24-bit micropower delta-sigma ADC with no-latency digital filtering, integrated oscillator, 4 ppm INL, 0.3 ppm RMS noise, and single-supply operation from 2.7V to 5.5V. It resolves analog inputs from –12.5% VREF to 112.5% VREF and supports 50/60 Hz notch rejection for precision weight scales and industrial sensor interfaces.

For engineers reviewing the LTC2404CG#TRPBF datasheet, LTC2404CG#TRPBF pinout, LTC2404CG#TRPBF application, or LTC2404CG#TRPBF equivalent, key selection criteria include guaranteed no-latency settling, live-zero extended input range, internal oscillator eliminating external timing components, SPI/MICROWIRE-compatible 4-wire interface, and 200 µA supply current in conversion mode.

Technical Context

The LTC2404CG#TRPBF implements a decimating FIR filter synchronized to an on-chip oscillator, enabling single-cycle digital filter settling - meaning the first conversion after channel change is always valid. Its delta-sigma architecture uses continuous auto-calibration of offset and full-scale every cycle, ensuring stability over temperature and supply voltage drift.

Channel selection is performed via 4-bit serial address on DIN during CSMUX high, with MUXOUT tied to ADCIN. The FO pin configures notch frequency (50 Hz at GND, 60 Hz at VCC) or accepts external clock (2.56–307.2 kHz) for user-defined rejection between 1 Hz and 120 Hz.

Key Specifications

Pinout & Package

Package: 28-lead plastic SSOP (G package), 5.6 mm × 10.2 mm, 0.635 mm pitch, RoHS-compliant, moisture sensitivity level 3.

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 LTC2404CG#TRPBF uniquely combines guaranteed no-latency settling, –12.5% to +112.5% VREF input range, and 110 dB 50/60 Hz rejection in a 4-channel, 200 µA solution - making it optimal for cost-sensitive, multiplexed industrial sensor nodes where first-sample validity and live-zero tolerance are non-negotiable.

Availability

LTC2404CG#TRPBF is available at Aetrix Electronics and suitable for weight scales, gas analyzers, strain gauge transducers, and direct temperature measurement systems requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for LTC2404CG#TRPBF 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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2404CG#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, designed specifically for low-power, high-accuracy sensor signal conditioning in space-constrained, noise-sensitive industrial instrumentation.

FAQ

What does "no latency" mean for the LTC2404CG#TRPBF?

"No latency" means the LTC2404CG#TRPBF delivers a valid conversion result immediately after the first sample following any channel change - no filter settling delay or discarded startup samples. This is achieved via its synchronized decimating FIR filter and internal oscillator, ensuring deterministic timing for real-time multiplexed sensor acquisition without software overhead.

Can the LTC2404CG#TRPBF operate with a 3.3 V supply and 2.5 V reference?

Yes, the LTC2404CG#TRPBF supports VCC from 2.7 V to 5.5 V and VREF from 0.1 V to VCC. With VCC = 3.3 V and VREF = 2.5 V, the input range becomes –0.3125 V to +2.8125 V, fully within absolute maximum ratings. Total unadjusted error remains ≤5 ppm, and RMS noise is ~0.3 ppm of 2.5 V (≈750 nV RMS).

How is channel selection implemented on the LTC2404CG#TRPBF?

Channel selection on the LTC2404CG#TRPBF is performed by shifting a 4-bit address into DIN while CSMUX is high, using CLK edges. The last four bits before CSMUX goes low determine the selected channel (CH0–CH3). CH4–CH7 are no-connect on this variant. No configuration registers or I²C/SPI commands are required - it's a hardware-addressed analog mux.

Does the LTC2404CG#TRPBF require external passive components for its oscillator?

No, the LTC2404CG#TRPBF includes a fully integrated, factory-trimmed oscillator. No external crystals, resonators, or capacitors are needed - the FO pin selects between internal 50 Hz/60 Hz modes or accepts an external clock (2.56–307.2 kHz). This eliminates timing component qualification and layout sensitivity.

What is the function of the MUXOUT pin on the LTC2404CG#TRPBF?

MUXOUT (Pin 7) is the analog output of the internal 4-channel multiplexer. It must be externally connected to ADCIN (Pin 4) to route the selected channel's signal to the ADC core. This separation allows optional signal conditioning (e.g., RC filtering or protection) between MUXOUT and ADCIN without affecting multiplexer performance.