LTC1748CFW#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC1748CFW#TRPBF is an 80Msps, 14-bit pipelined analog-to-digital converter (ADC) from Analog Devices. It operates on a single 5V supply with a power dissipation of 1.4W. The device features selectable differential input ranges of –1V or –1.6V and delivers a signal-to-noise ratio (SNR) of 76.3dB at 5MHz input in the 3.2V range. Key specifications include 90dB spurious-free dynamic range (SFDR), 0.15ps RMS jitter, and no missing codes. It utilizes a 48-lead plastic 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
• Ultralow aperture delay jitter of 0.15ps RMS for high-frequency undersampling
• Selectable input ranges: –1V (SENSE grounded) or –1.6V (SENSE to VDD)
• Digital output drivers support OVDD from 0.5V to 5V for direct DSP/FIFO interfacing

Analog To Digital Converters (ADC) Applications

• Telecommunications infrastructure
• Cellular base stations and receivers
• Spectrum analysis equipment
• Imaging systems requiring wide dynamic range

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'CFW' corresponds to the commercial temperature range (0°C to 70°C) as defined in the datasheet absolute maximum ratings. Confirm that the '#TRPBF' designation indicates tape and reel packaging. Ensure compatibility with the required 5V analog supply and appropriate bypass capacitor values (1µF ceramic) near the VDD pins.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 80Msps sample rate and 14-bit resolution are required for high-frequency signal digitization. The LTC1748 is suitable for applications demanding low jitter (<0.2ps) to preserve SNR at RF frequencies. Consider the pin-compatible family members (LTC1746, LTC1745, etc.) if lower sampling rates like 25Msps or 50Msps suffice for the design.

Analog To Digital Converters (ADC) Part Context

The LTC1748 belongs to a pin-compatible family of high-speed ADCs from Analog Devices. This family includes variants with different resolutions and speeds, such as the 12-bit LTC1747 (80Msps), 14-bit LTC1746 (25Msps), and 12-bit LTC1745 (25Msps). This common footprint allows designers to scale performance requirements without changing the PCB layout significantly.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include the LTC1748IFW (industrial temperature range) for wider operating conditions. For lower speed requirements, the LTC1746CFW (14-bit, 25Msps) or LTC1745CFW (12-bit, 25Msps) can be used. Cross-family replacement requires careful evaluation of interface timing and power consumption.