LTC2170CUKG-14#PBF

Analog To Digital Converters (ADC) Overview

The LTC2170CUKG-14#PBF is a 4-channel, simultaneous sampling 14-bit analog-to-digital converter (ADC) operating at a maximum sampling rate of 25Msps. It features a pipeline architecture with serial LVDS outputs and an internal reference. Key electrical specifications include a typical Signal-to-Noise Ratio (SNR) of 72.8dBFS, Spurious Free Dynamic Range (SFDR) of 90dBFS, Integral Nonlinearity (INL) of ±1LSB, and Differential Nonlinearity (DNL) of ±0.3LSB. The device operates on a single 1.8V supply with total power dissipation of 162mW in 2-lane mode. It is housed in a 52-pin QFN package.

Analog To Digital Converters (ADC) Feature Summary

• Four-channel simultaneous sampling with 14-bit resolution
• Low jitter sample-and-hold acquisition delay of 0.15ps RMS
• Serial LVDS data outputs with selectable 1-lane or 2-lane modes
• Internal clock duty cycle stabilizer for high performance across various clock duty cycles

Analog To Digital Converters (ADC) Applications

• Communications systems
• Cellular base stations
• Software Defined Radios
• Portable medical imaging
• Multichannel data acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific speed grade matches the application requirement, as the LTC2170-14 is limited to 25Msps compared to higher-speed variants in the family. Confirm that the commercial temperature range (0°C to 70°C) aligns with the system environment. Ensure the 52-lead QFN footprint and exposed pad soldering requirements are accommodated in the PCB layout design.

Analog To Digital Converters (ADC) Selection Notes

Select this component when four synchronized channels are required at moderate speeds up to 25Msps. The internal reference simplifies design by eliminating external voltage references if the SENSE pin is configured correctly. Consider the 162mW power consumption against thermal constraints. Verify that the serial LVDS interface timing meets the downstream FPGA or processor capabilities.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC217x-14 series, which includes the LTC2172-14 (65Msps) and LTC2171-14 (40Msps). All three share identical pinouts, architectures, and AC performance characteristics, differing only in their maximum sampling frequencies. This allows for speed-based selection without changing the physical board layout.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2171CUKG-14#PBF and LTC2172CUKG-14#PBF are pin-compatible replacements offering higher sampling rates of 40Msps and 65Msps respectively. No functional changes are required for substitution within the same package type.