LTC2258IUJ-14

Analog To Digital Converters (ADC) Overview

The LTC2258IUJ-14 is a 14-bit, 65Msps ultralow power analog-to-digital converter (ADC) from Analog Devices Inc. It utilizes a pipeline architecture and operates on a single 1.8V supply. Key electrical specifications include a signal-to-noise ratio (SNR) of 71.1dB and a spurious-free dynamic range (SFDR) of 88dB. The device features an 800MHz full-power bandwidth sample-and-hold circuit and supports selectable input ranges from 1VP-P to 2VP-P. Digital outputs are available in CMOS, DDR CMOS, or DDR LVDS formats. The component is housed in a 40-lead (6mm × 6mm) QFN package with an exposed ground pad.

Analog To Digital Converters (ADC) Feature Summary

• 14-Bit Resolution at 65Msps Sampling Rate
• Ultralow Power Consumption: 79mW Typical
• High Dynamic Performance: 71.1dB SNR, 88dB SFDR
• Selectable Input Ranges: 1VP-P to 2VP-P
• Flexible Digital Outputs: CMOS, DDR CMOS, or DDR LVDS

Analog To Digital Converters (ADC) Applications

• Communications Systems
• Cellular Base Stations
• Software Defined Radios
• Portable Medical Imaging
• Multi-Channel Data Acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix for temperature grade and packaging format. The 'I' designation indicates an industrial temperature range of –40°C to 85°C. Confirm whether the part number includes '#PBF' for lead-free tube packaging or '#TRPBF' for tape and reel delivery. Ensure compatibility with the required digital output interface mode before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this model for applications requiring high linearity and low power consumption at 65Msps. The internal reference simplifies design when using the SENSE pin configuration. Consider the digital output interface requirements; DDR modes reduce pin count but require careful timing analysis. Verify that the analog input common-mode voltage aligns with the VCM output capability of the ADC.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC2258-12/LTC2257-12/LTC2256-12 family of ultralow power 1.8V ADCs. While the datasheet primarily details the 12-bit variants, the 14-bit version shares the same core architecture, package, and power management features. It serves as a high-performance alternative to lower-speed models within the same product line.

Analog To Digital Converters (ADC) Replacement Considerations

LTC2258CUJ-14#PBF offers the same electrical specifications but with a commercial temperature range (0°C to 70°C). LTC2257IUJ-14#PBF provides a reduced sampling rate of 40Msps with identical pinout and power characteristics.