LTC2408IG#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC2408IG#TRPBF is an 8-channel, 24-bit micropower delta-sigma analog-to-digital converter (ADC) from Analog Devices Inc. Operating on a single supply of 2.7V to 5.5V, it features an integrated oscillator and delivers 4ppm integral nonlinearity (INL) with no missing codes. The device provides single-cycle digital filter settling time, ensuring the first conversion after channel switching is valid. It accepts reference voltages from 0.1V to VCC and supports an extended input range of –12.5% to 112.5% of VREF. Key electrical parameters include a typical supply current of 200µA in conversion mode, 0.3ppm RMS noise, and a minimum 110dB rejection at 50Hz or 60Hz. It communicates via a flexible 4-wire interface compatible with SPI and MICROWIRE protocols.

Analog To Digital Converters (ADC) Feature Summary

• 8-Channel Multiplexer: Integrated 8-channel analog multiplexer with break-before-make timing to prevent signal overlap during switching.
• High Precision: Delivers 24-bit resolution with no missing codes, 4ppm INL, and 0.3ppm RMS noise for high-accuracy measurements.
• No Latency Architecture: Single-cycle digital filter settling allows immediate valid data output upon channel change, simplifying multiplexed applications.
• Integrated Oscillator: On-chip oscillator eliminates external frequency-setting components while providing >110dB rejection at 50Hz/60Hz line frequencies.

Analog To Digital Converters (ADC) Applications

• Industrial Process Control
• Data Acquisition Systems
• Strain Gauge Transducers
• Gas Analyzers
• Direct Temperature Measurement

Analog To Digital Converters (ADC) Procurement Notes

Verify the suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the 'I' grade designation corresponds to the industrial temperature range of –40°C to 85°C. Ensure the specific lot date code meets project requirements as manufacturing dates vary by batch. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2408 over the LTC2404 if eight analog input channels are required, as the LTC2404 only supports four. Choose this component for applications demanding high resolution with minimal latency between channel switches. Ensure the system reference voltage falls within the 0.1V to VCC range. Verify that the host microcontroller supports the required 4-wire serial interface timing modes.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2404/LTC2408 family of micropower ADCs. The 'IG' suffix denotes the plastic SSOP package and industrial temperature rating. The '#TRPBF' suffix specifies the reel packaging and lead-free/compliant status. It serves as the 8-channel variant within the series, sharing identical performance characteristics with its 4-channel counterpart except for channel count.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2404CG#TRPBF is a pin-compatible alternative offering 4 channels instead of 8. For higher channel counts, consider the LTC2408's siblings in the mPower series. Direct replacements must match the 28-lead SSOP package and 24-bit sigma-delta architecture. Verify interface compatibility if substituting with other high-resolution ADCs.