AD6645-80/PCBZ

AD6645-80/PCBZ FEATURES

SNR = 75 dB, fIN 15 MHz, up to 105 MSPSSNR = 72 dB, fIN 200 MHz, up to 105 MSPSSFDR = 89 dBc, fIN 70 MHz, up to 105 MSPS100 dBFS multitone SFDRIF sampling to 200 MHzSampling jitter: 0.1 ps1.5 W power dissipationDifferential analog inputsPin compatible to AD6644Twos complement digital output format3.3 V CMOS compatibleData-ready for output latching

AD6645-80/PCBZ GENERAL DESCRIPTION

The AD6645 is a high speed, high performance, monolithic 14-bitanalog-to-digital converter (ADC). All necessary functions,including track-and-hold (T/H) and reference, are included on thechip to provide a complete conversion solution. The AD6645provides CMOS-compatible digital outputs. It is the fourthgeneration in a wideband ADC family, preceded by the AD9042(12-bit, 41 MSPS), the AD6640 (12-bit, 65 MSPS, IF sampling),and the AD6644 (14-bit, 40 MSPS/65 MSPS).Designed for multichannel, multimode receivers, the AD6645 ispart of the Analog Devices, Inc., SoftCell® transceiver chipset.The AD6645 maintains 100 dB multitone, spurious-free dynamicrange (SFDR) through the second Nyquist band. This breakthroughperformance eases the burden placed on multimode digitalreceivers (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 Analog Devices extra fastcomplementary bipolar (XFCB) process and uses an innovative,multipass circuit architecture. Units are available in a 52-leadexposed pad (TQFP_EP) package specified from −40°C to+85°C at 80 MSPS and −10°C to +85°C at 105 MSPS.

AD6645-80/PCBZ APPLICATIONS

Multichannel, multimode receiversBase station infrastructuresAMPS, IS-136, CDMA, GSM, W-CDMASingle channel digital receiversAntenna array processingCommunications instrumentationRadars, infrared imagingInstrumentation