ADI AD6645ASVZ-105

The AD6645 is a high speed, high performance, monolithic 14-bit analog-to-digital converter (ADC). All necessary functions, including track-and-hold (T/H) and reference, are included on the chip to provide a complete conversion solution. The AD6645 provides CMOS-compatible digital outputs. It is the fourth generation in a wideband ADC family. Designed for multichannel, multimode receivers, the AD6645 maintains 100 dB multitone, spurious-free dynamic range (SFDR) through the second Nyquist band. This breakthrough performance eases the burden placed on multimode digital receivers (software radios) that are typically limited by the ADC. Noise performance is exceptional; typical signal-to-noise ratio (SNR) is 74.5 dB through the first Nyquist band. The AD6645 is built on the extra fast complementary bipolar (XFCB) process and uses an innovative, multipass circuit architecture. Units are available in a 52-lead exposed pad (TQFP_EP) package specified from -40°C to +85°C at 80 MSPS and -10°C to +85°C at 105 MSPS.

• SNR = 75 dB, fIN 15 MHz, up to 105 MSPS
• SNR = 72 dB, fIN 200 MHz, up to 105 MSPS
• SFD R = 89 dBc, fIN 70 MHz, up to 105 MSPS
• 100 dBFS multitone SFDR
• IF sampling to 200 MHz
• Sampling jitter: 0.1 ps
• 1.5 W power dissipation
• Differential analog inputs
• Pin compatible to AD6644
• Twos complement digital output format
• 3.3 V CMOS compatible
• Data-ready for output latching

• Multichannel, multimode receivers
• Base station infrastructures
• AMPS, IS-136, CDMA, GSM, W-CDMA
• Single channel digital receivers
• Antenna array processing
• Communications instrumentation
• Radars, infrared imaging
• Instrumentation