14 Bit ADC Converter 40-QFN Analog Devices ADI LTC2261IUJ-14#PBF

The LTC2261IUJ-14#PBF is a high-performance 14-bit analog-to-digital converter (ADC) designed by Analog Devices (formerly Linear Technology). Optimized for high-speed signal processing, it combines precision, low power consumption, and flexibility, making it suitable for demanding applications in communications, medical devices, and industrial systems.

• High-Speed Conversion
  • Achieves 125 MSPS sampling rate with a 5-cycle pipeline architecture
  • Features 73.4 dB SNR and 85 dB SFDR
  • Ultra-low 0.17 ps RMS jitter supports undersampling
• Flexible Input Configuration
  • Accepts differential or single-ended analog inputs with selectable ranges: 1.0 VP-P or 2.0 VP-P
  • Supports various input signaling standards
  • Optional clock duty cycle stabilizer
• Digital Output Options
  • Configurable output modes via SPI interface
  • LVDS outputs feature adjustable current and integrated termination
  • Supports multiple data formats
• Low Power & Efficient Operation
  • Consumes 127 mW at full speed
  • Power-saving features include shutdown control
• Precision & Stability
  • Integral nonlinearity (INL) of ±1 LSB
  • Internal voltage reference with low drift
• SPI Configuration
  • 3-wire SPI interface enables dynamic control
  • On-chip registers allow real-time adjustments

• Wireless Communications - Cellular base stations, SDRs, RF test equipment
• Medical Imaging - Portable ultrasound, MRI/CT scanners
• Industrial & Instrumentation - Data acquisition, NDT, aerospace
• High-Speed Instrumentation - Oscilloscopes, optical communication
• Automotive & Defense - ADAS, military radios

• Resolution: 14 bits
• Sampling Rate: 125 MSPS
• SNR: 73.4 dB
• SFDR: 85 dB
• Input Range: 1.0 VP-P or 2.0 VP-P (differential)
• Power Supply: 1.7-1.9 V (analog), 1.1-1.9 V (digital)
• Package: 40-pin QFN (6 mm × 6 mm)
• Temperature Range: -40°C to +85°C (industrial grade)

• Use low-jitter clocks to maximize ADC performance
• Pair with fully differential amplifiers like the LTC6409 for optimal noise suppression
• Ensure proper grounding and decoupling in high-speed layouts