LTC2391CLX-16

Overview

The LTC2391CLX-16 is a low-noise, high-speed 16-bit Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. It operates from a single 5V supply and supports sampling rates up to 250ksps. The device features a large ±4.096V fully differential input range, enabling maximum dynamic range in data acquisition systems. Key performance metrics include a typical Signal-to-Noise Ratio (SNR) of 94dB and a Spurious-Free Dynamic Range (SFDR) of 104dB at a 20kHz input frequency. It integrates an internal reference with 0.5% initial accuracy and offers flexible parallel or serial digital output interfaces.

Feature Summary

• 16-bit resolution with 250ksps sampling rate
• Single 5V power supply operation
• ±4.096V fully differential input range
• Internal precision voltage reference (4.096V)
• Configurable parallel or serial digital interface

Applications

• High-performance data acquisition systems requiring wide dynamic range
• Industrial process control and automation
• Medical instrumentation
• Test and measurement equipment

Procurement Notes

Verify the specific suffix 'CLX' indicates the tape-and-reel packaging variant when ordering. Confirm that the required operating temperature range aligns with the commercial grade specifications associated with this part number. Ensure compatibility with the 5V analog supply and appropriate digital logic levels for the selected interface mode.

Selection Notes

Select the LTC2391CLX-16 when a sampling rate of 250ksps is sufficient for the application, as higher speed variants like the LTC2393-16 offer faster conversion times. This component is suitable for designs requiring a fully differential input stage without external front-end amplification. Consider the integrated internal reference if system cost and board space are constrained, though external references may be needed for ultra-high precision requirements.

Part Context

This component belongs to the LTC2391-16 family of low-noise SAR ADCs. It shares architectural similarities with the LTC2392-16 (500ksps) and LTC2393-16 (1Msps), differing primarily in maximum sampling speed. The CLX suffix denotes the surface-mount LQFP-48 package configuration optimized for automated assembly.

Replacement Considerations

The LTC2392CLX-16 and LTC2393CLX-16 are pin-compatible upgrades offering higher sampling speeds (500ksps and 1Msps respectively). For lower speed requirements, verify if slower variants meet timing constraints while maintaining the same package and interface compatibility.