LTC2449CUHF

Mfr. Part

LTC2449CUHF

Manufacturer

Linear Technology now part of Analog Devices

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Detailed Description

LTC2449CUHF is a high resolution 24‑bit no latency delta‑sigma analog to digital converter with an integrated input multiplexer

It supports up to 16 single‑ended or 8 differential channels, offers a flexible speed versus resolution tradeoff, and communicates through a simple SPI compatible serial interface

The device delivers very low noise conversion with strong 50 Hz and 60 Hz line noise rejection at low data rates and fast throughput at higher data rates, making it well suited for precision sensor measurement, data acquisition, and instrumentation

Operates from a single 2.7 V to 5.5 V supply and uses an external reference for full accuracy

Key Features

24‑bit no latency delta‑sigma ADC for true single cycle settling when switching channels

Up to 16 single‑ended or 8 differential input channels via on‑chip MUX

Programmable speed and resolution to optimize for noise or throughput

Strong 50 Hz and 60 Hz rejection at low output rates for industrial environments

SPI compatible 3‑wire or 4‑wire serial interface for easy MCU and DSP connection

Built‑in auto calibration and internal oscillator to simplify design

Wide supply range 2.7 V to 5.5 V with low power operation

Differential or pseudo‑differential measurements with external reference pins

Input overrange and status indicators to enhance system reliability

Key Advantages

High accuracy and very low noise reduce the need for external amplification and heavy filtering

No latency architecture allows fast scanning of multiple channels without digital filter delay

Flexible configuration adapts to many sensors and sampling needs in one design

Strong line frequency rejection improves performance in electrically noisy sites

Simple serial interface speeds firmware integration and lowers development time

Packaging

Type QFN with exposed thermal pad package code UHF from Linear Technology

Material RoHS compliant plastic mold compound with copper leadframe and matte tin plating

Body size UHF package class commonly used by Linear Technology for 38‑lead QFN devices see the datasheet package drawing for exact dimensions and tolerances

Pin configuration 38 leads including multiple analog inputs, reference pins REF+ and REF−, serial clock SCK, serial data in and out, chip select, and power and ground pins consult the pin table in the datasheet for exact pinout

Thermal characteristics exposed pad improves heat transfer and lowers thermal resistance recommended to solder the pad to a solid ground plane with thermal vias for best thermal and electrical performance exact theta values depend on PCB layout and copper

Electrical properties supply range typically 2.7 V to 5.5 V digital IO compatible with supply domain uses external precision reference for full‑scale range typical ESD protection per Analog Devices standards see absolute maximum ratings in the datasheet

Lifecycle

Status Active and in production at Analog Devices at the time of writing

Family equivalents and close alternatives within Analog Devices and Linear Technology

- LTC2448 similar 24‑bit no latency ADC with fewer channels

- LTC2444 and LTC2445 related multi‑channel 24‑bit no latency ADCs with varying channel counts and features

- AD7799 and AD7190 series precision 24‑bit sigma‑delta ADCs for high accuracy single or few channel designs

- AD7175 and AD7177 high performance 24‑bit sigma‑delta ADCs with fast settling and excellent noise performance

Cross vendor alternatives functionally comparable evaluate carefully for pinout and firmware differences

- Texas Instruments ADS1256 and ADS1262 high resolution sigma‑delta ADCs with multi‑channel options

- Microchip MCP3564 family 24‑bit delta‑sigma ADCs with low noise and fast data rates

If you need drop‑in pin compatibility or an exact functional alternative for LTC2449CUHF contact Y‑IC via our website and our sales and engineering teams will recommend the best substitute

Key Application Areas

Precision data acquisition and instrument front ends

Industrial process control and PLC analog input modules

Weigh scales load cells pressure and bridge sensors

Temperature measurement with RTDs and thermocouples

Portable and battery‑powered measurement equipment

Scientific and medical instrumentation

Energy metering and power quality monitoring

Environmental and structural data loggers

Datasheet

Our website hosts the most authoritative and up to date datasheet for LTC2449CUHF including the official package drawing UHF and all electrical specifications

We strongly recommend downloading the datasheet on this page to confirm pinout timing noise tables and layout guidelines

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