LTC2389ILX-16

Overview

The LTC2389ILX-16 is a 16-bit, 2.5Msps Successive Approximation Register (SAR) Analog-to-Digital Converter manufactured by Analog Devices Inc. It operates from a single 5V supply and features pin-configurable analog input ranges, including fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V). The device integrates an internal 4.096V reference with 0.5% initial accuracy. Key performance metrics include a typical Signal-to-Noise Ratio (SNR) of 96 dB, Spurious-Free Dynamic Range (SFDR) of 117 dB, and Total Harmonic Distortion (THD) of -116 dB at 2kHz input. Power consumption is 162.5 mW at full speed.

Feature Summary

• 16-bit resolution with 2.5Msps sampling rate and no missing codes
• Pin-configurable analog inputs: Fully Differential, Pseudo-Differential Unipolar, and Bipolar
• Integrated 4.096V precision voltage reference with 0.5% initial accuracy
• Low power consumption of 162.5 mW with Nap and Sleep modes

Applications

• Industrial process control systems requiring high precision
• Medical instrumentation such as ultrasound and patient monitors
• Test and measurement equipment like oscilloscopes and data acquisition systems
• High-resolution vibration monitoring and acoustic sensing

Procurement Notes

Verify the specific suffix 'ILX' indicates the industrial temperature range (-40°C to +85°C) compared to the commercial 'CLX' variant. Confirm the package is LQFP-48. Check for moisture sensitivity level requirements during storage and handling. Ensure the internal reference meets system accuracy needs without external calibration.

Selection Notes

Select this component when 16-bit resolution and 2.5Msps throughput are required in a single-channel SAR ADC architecture. Choose the ILX grade for industrial temperature applications. Consider the integrated reference to reduce bill of materials if ±20ppm/°C drift is acceptable. Verify that the 5V single-supply operation aligns with the system power design.

Part Context

The LTC2389 series includes 16-bit and 18-bit variants. The LTC2389ILX-16 is the 16-bit version within the industrial temperature grade family. It shares the same core architecture and pinout with the LTC2389ILX-18 but offers lower resolution. This places it between lower-speed legacy ADCs and higher-performance delta-sigma converters in terms of bandwidth and complexity.

Replacement Considerations

Direct functional replacements within the same family include the LTC2389CLX-16#PBF (commercial grade) or LTC2389HSX-16#PBF (high-speed/high-temp). Cross-family replacements require checking interface compatibility and pinout alignment.