LTC2391ILX-16#PBF

Overview

The LTC2391ILX-16#PBF is a 16-bit, 250ksps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 5V supply and supports a ±4.096V fully differential input range. The device achieves a typical SNR of 94dB at fIN = 20kHz and guarantees no missing codes at 16 bits with a maximum INL of ±2LSB. It features an internal precision reference with ±20ppm/°C temperature coefficient, parallel and serial interface modes, and dissipates 95mW at full throughput. The component is housed in a 48-lead 7mm × 7mm plastic LQFP package.

Feature Summary

• 16-bit resolution with guaranteed no missing codes and ±2LSB max INL
• 250ksps throughput rate with no pipeline delay or cycle latency
• Single 5V supply operation with 1.8V to 5V I/O voltage compatibility
• Internal precision reference (4.096V) with ±20ppm/°C max tempco

Applications

• Medical Imaging
• High Speed Data Acquisition
• Digital Signal Processing
• Industrial Process Control
• Instrumentation

Procurement Notes

Verify the specific ordering suffix ILX corresponds to the 48-lead LQFP package and the -I grade for the –40°C to 85°C operating temperature range. Confirm that the #PBF suffix indicates lead-free finish and RoHS compliance as per manufacturer standards. Ensure the source documentation explicitly lists this part number to avoid confusion with QFN variants or different temperature grades.

Selection Notes

Select this component when a low noise, high-speed 16-bit ADC is required with a wide dynamic range. The ±4.096V differential input range makes it suitable for applications demanding maximum signal swing. Consider the internal reference specifications if external references are not desired, noting the 0.5% initial accuracy. Verify interface requirements, as the device supports both parallel and serial digital outputs via the SER/PAR pin.

Part Context

The LTC2391-16 is part of a family of low noise SAR ADCs that includes the LTC2392-16 (0.5MSPS) and LTC2393-16 (1MSPS). These devices share similar architectural features, including the single 5V supply operation and large differential input range. The ILX variant specifically denotes the LQFP package option within the LTC2391 product line, distinguishing it from the UK (QFN) package options.

Replacement Considerations

Public confirmed substitute part numbers: LTC2391CUK-16#PBF, LTC2391IUK-16#PBF.