LTC2248CUH#PBF

Analog To Digital Converters (ADC) Overview

The LTC2248CUH#PBF is a 14-bit, 65Msps low-power analog-to-digital converter (ADC) from Analog Devices. It operates on a single 3V supply (2.7V to 3.4V) with typical power dissipation of 205mW. The device features a pipeline architecture with flexible differential or single-ended inputs ranging from ±0.5V to ±1V. Key AC performance metrics include a signal-to-noise ratio (SNR) of 74.3dB and a spurious-free dynamic range (SFDR) of 90dB at the Nyquist frequency. It includes an internal reference, clock duty cycle stabilizer, and shutdown/nap modes for power management.

Analog To Digital Converters (ADC) Feature Summary

• 14-bit resolution with 65Msps sampling rate
• Single 3V supply operation (2.7V to 3.4V)
• Low power consumption: 205mW typical
• High dynamic performance: 74.3dB SNR, 90dB SFDR
• Flexible input range: ±0.5V to ±1V p-p
• Integrated clock duty cycle stabilizer
• Shutdown and Nap modes for power reduction

Analog To Digital Converters (ADC) Applications

• Wireless and wired broadband communication systems
• Imaging systems requiring high dynamic range
• Ultrasound medical equipment
• Spectral analysis instruments
• Portable instrumentation devices

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific temperature grade 'C' indicates commercial operation (0°C to 70°C). Confirm the '#PBF' suffix denotes lead-free packaging compliant with RoHS standards. Ensure the QFN-32 package footprint matches the PCB layout requirements, particularly the exposed pad connection for thermal and electrical grounding.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 14-bit resolution and 65Msps speed are required within a low-power constraint. Compare against LTC2247 (40Msps) or LTC2246 (25Msps) if lower sample rates suffice for reduced power. Consider the LTC2248I variant if industrial temperature range (-40°C to 85°C) is necessary. Verify input drive capabilities match the system's source impedance for optimal SFDR.

Analog To Digital Converters (ADC) Part Context

The LTC2248 is part of a pin-compatible family including the LTC2247 and LTC2246, which offer lower sampling rates but share similar interfaces and power profiles. This family allows designers to scale performance without redesigning the PCB layout. The device utilizes a CMOS pipelined architecture optimized for digitizing high-frequency signals in communications and imaging applications.

Analog To Digital Converters (ADC) Replacement Considerations

Direct pin-compatible replacements within the same family include the LTC2247CUH#PBF (40Msps) and LTC2246CUH#PBF (25Msps) for lower speed/power needs. For higher speeds, consider the LTC2254IUH#PBF (105Msps) or LTC2255IUH#PBF (125Msps), though these may require different power management strategies.