LTC1748IFW#PBF

Analog To Digital Converters (ADC) Overview

The LTC1748IFW#PBF is an 80Msps, 14-bit pipelined analog-to-digital converter (ADC) from Analog Devices Inc. It operates on a single 5V supply and dissipates approximately 1.4W of power. The device features selectable differential input ranges of –1V or –1.6V via the SENSE pin. Key performance metrics include a signal-to-noise ratio (SNR) of 76.3dB at 5MHz with a 3.2V range and 90dB spurious-free dynamic range (SFDR). It utilizes a 48-lead TSSOP package and supports digital interfaces compatible with 5V, 3V, 2V, and LVDS logic systems.

Analog To Digital Converters (ADC) Feature Summary

• 80Msps sampling rate with 14-bit resolution and no missing codes
• Selectable input ranges: –1V (SENSE grounded) or –1.6V (SENSE to VDD)
• Low aperture jitter of 0.15ps RMS for high-frequency undersampling
• Digital output supply (OVDD) adjustable from 0.5V to 5V for direct DSP interfacing

Analog To Digital Converters (ADC) Applications

• Telecommunications infrastructure
• Cellular base stations
• Spectrum analysis equipment
• Imaging systems

Analog To Digital Converters (ADC) Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and check for end-of-life notifications, as older ADC models may face obsolescence. Ensure the specific IFW suffix matches the required industrial temperature range (-40°C to 85°C) and TSSOP-48 package configuration for your design.

Analog To Digital Converters (ADC) Selection Notes

Select this model when an 80Msps sample rate is required for wideband signal digitization. Compare against the LTC1746 (25Msps) or LTC1744 (50Msps) if lower bandwidth suffices. Ensure the input drive circuitry can support the 50Ω source impedance requirement and that the 1.4W power dissipation fits within the thermal constraints of the TSSOP-48 package.

Analog To Digital Converters (ADC) Part Context

The LTC1748 belongs to a pin-compatible family of high-speed ADCs from Linear Technology (now Analog Devices). It shares the same footprint and pinout with the LTC1746, LTC1745, LTC1744, LTC1743, LTC1742, LTC1741, and LTC1747, allowing for easy migration between different sampling rates and resolutions within the same product line.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include the LTC1746IFW#PBF (25Msps), LTC1744IFW#PBF (50Msps), and LTC1742IFW#PBF (65Msps). Verify that the reduced sampling rates of these alternatives meet the Nyquist requirements of the target application.