LTC2389HLX-18

Overview

The LTC2389HLX-18 is a single-channel, 18-bit Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. It operates at a sampling rate of 2.5Msps and features a 48-pin LQFP package. The device supports pin-configurable analog input ranges, including fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V). It utilizes a single 5V supply and includes an internal voltage reference with 0.5% initial accuracy. Digital output is available via parallel or serial interfaces.

Feature Summary

• 18-bit resolution with 2.5Msps throughput
• Pin-configurable analog input ranges: ±4.096V, 0-4.096V, ±2.048V
• Internal 4.096V reference with 0.5% initial accuracy
• Low power consumption of 162.5mW at full speed

Applications

• High-resolution data acquisition systems
• Industrial process control instrumentation
• Medical equipment signal conditioning
• Test and measurement instruments

Procurement Notes

Verify the specific suffix 'HLX' against official Analog Devices documentation to confirm temperature range and packaging details. Ensure compatibility with the 48-LQFP footprint during PCB design. Confirm RoHS compliance status for the specific lot. Check for moisture sensitivity level requirements during storage and handling.

Selection Notes

Select this component when 18-bit precision and 2.5Msps speed are required in a single-channel configuration. The pin-configurable inputs simplify interface design for various signal types without external level shifting. Consider the internal reference accuracy if external precision references are not feasible. Evaluate power constraints as the device consumes 162.5mW at maximum sampling rate.

Part Context

The LTC2389 series comprises high-speed, low-power SAR ADCs. The -18 variant denotes 18-bit resolution. Other variants in the family include 16-bit versions like the LTC2389-16. The device is part of Analog Devices' general-purpose ADC portfolio, designed for applications requiring high linearity and flexibility in analog input configurations.

Replacement Considerations

Direct replacements within the same package and pinout include other LTC2389 variants such as LTC2389CLX-18 or LTC2389ILX-18, depending on the required industrial or extended temperature range. Verify that the substitute part maintains the same 48-LQFP footprint and electrical specifications.