Analog Devices Inc. LTC2404IG#TRPBF

Overview

LTC2404IG#TRPBF from Analog Devices (formerly Linear Technology) is a 4-channel, 24-bit micropower delta-sigma ADC with no-latency digital filtering, integrated oscillator, 4ppm INL, 0.3ppm 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 50Hz/60Hz notch rejection for precision industrial sensor interfacing.

For engineers reviewing the LTC2404IG#TRPBF datasheet, LTC2404IG#TRPBF pinout, LTC2404IG#TRPBF application, or LTC2404IG#TRPBF equivalent, key selection criteria include its guaranteed no-missing-codes resolution, live-zero extended input range, internal oscillator eliminating external timing components, SPI/MICROWIRE-compatible 4-wire interface, and –40°C to 85°C industrial temperature grade.

Technical Context

The LTC2404IG#TRPBF implements a decimating FIR filter synchronized to an on-chip oscillator, delivering true single-cycle settling with zero latency-ensuring the first conversion after channel change is valid. Its auto-calibrating architecture performs offset and full-scale correction every cycle, maintaining stability across temperature and supply voltage variations.

It uses a 28-lead SSOP package with dedicated multiplexer control pins (CSMUX, DIN, CLK), independent ADC control (CSADC, SDO, SCK), and configurable notch filtering via the FO pin-enabling 50Hz rejection (FO = VCC), 60Hz rejection (FO = GND), or user-defined rejection (FO = external clock at 2.56–307.2 kHz).

Key Specifications

Pinout & Package

Package: 28-lead plastic SSOP (G package), 5.6 mm × 10.2 mm, 0.635 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision, low-power sigma-delta ADC applications.

Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2404IG#TRPBF uniquely combines 4-channel integration, guaranteed no-latency conversion, extended input range, and oscillator-based notch filtering in a single 28-SSOP package-making it optimal for compact, low-power, multi-sensor industrial instrumentation where first-sample validity and system-level error absorption are mandatory.

Availability

LTC2404IG#TRPBF is available at Aetrix Electronics and suitable for weight scales, direct temperature measurement, gas analyzers, and strain gauge transducer systems requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.

Supply support for LTC2404IG#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 LTC2404IG#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, designed specifically for low-power, high-accuracy sensor interface applications demanding exceptional DC specifications, robust noise immunity, and simplified system integration.

FAQ

What is the operating temperature range of the LTC2404IG#TRPBF?

The LTC2404IG#TRPBF is rated for operation from –40°C to +85°C, making it suitable for industrial environments including factory automation, outdoor instrumentation, and automotive under-hood sensing. This I-grade specification is confirmed in the Absolute Maximum Ratings table and applies across all electrical parameters unless otherwise noted. The LTC2404IG#TRPBF maintains its 4ppm INL and 0.3ppm noise performance within this full range.

Does the LTC2404IG#TRPBF require external timing components?

No, the LTC2404IG#TRPBF integrates a precision internal oscillator that eliminates all external timing components-including crystals, resonators, or RC networks-for both conversion clocking and 50/60Hz notch filtering. The FO pin configures the oscillator's target rejection frequency (50Hz, 60Hz, or user-defined), and no external capacitors or resistors are needed to set frequency or stability. This is explicitly stated in the Features list and verified in the Oscillator section of the datasheet.

How many analog input channels does the LTC2404IG#TRPBF support?

The LTC2404IG#TRPBF supports exactly four analog input channels (CH0–CH3). Pins CH4 through CH7 are designated as "no connects" on this variant, as confirmed in the Pin Functions section and top-view package diagram. This distinguishes it from the pin-compatible LTC2408IG#TRPBF, which provides eight channels. Channel selection is performed via 4-bit serial address on DIN during CSMUX high state.

What is the meaning of "no latency" in the LTC2404IG#TRPBF specification?

"No latency" means the LTC2404IG#TRPBF delivers a valid conversion result for the newly selected channel immediately after the first conversion cycle-no discarded samples or filter settling delay is required. As stated in the datasheet: "The first conversion after the channel is changed is always valid." This is enabled by its single-cycle digital filter architecture and eliminates the need for software discard loops or timing overhead in multiplexed sensor systems.

Can the LTC2404IG#TRPBF operate with a 0.1V reference voltage?

Yes, the LTC2404IG#TRPBF supports reference voltages as low as 0.1V, as specified in the VREF parameter table and Applications Information section. At 0.1V reference, the extended input range becomes –12.5 mV to +112.5 mV, and RMS noise remains ~1.5 µV (0.3ppm of 0.1V = 0.3 µV, but thermal noise dominates). However, INL improves at lower VREF, and the device maintains full 24-bit no-missing-codes resolution across the entire 0.1V–VCC range.