AD6640

a FEATURES 65 MSPS Minimum Sample Rate 80 dB Spurious-Free Dynamic Range IF-Sampling to 70 MHz 710 mW Power Dissipation Single +5 V Supply On-Chip T/H and Reference Twos Complement Output Format 3.3 V or 5 V CMOS-Compatible Output Levels APPLICATIONS Cellular/PCS Base Stations Multichannel, Multimode Receivers GPS Anti-Jamming Receivers Communications Receivers Phased Array Receivers PRODUCT DESCRIPTION AIN AIN VREF ENCODE ENCODE 12-Bit, 65 MSPS IF Sampling A/D Converter AD6640 FUNCTIONAL BLOCK DIAGRAM AVCC DVCC BUF TH1 TH2 TH3 A ADC +2.4V REFERENCE INTERNAL TIMING ADC 6 DAC AD6640 7 DIGITAL ERROR CORRECTION LOGIC MSB LSB D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 GND PRODUCT HIGHLIGHTS The AD6640 is a high speed, high performance, low power, monolithic 12-bit analog-to-digital converter. All necessary functions, including track-and-hold (T/H) and reference are included on-chip to provide a complete conversion solution. The AD6640 runs on a single +5 V supply and provides CMOScompatible digital outputs at 65 MSPS. Specifically designed to address the needs of multichannel, multimode receivers, the AD6640 maintains 80 dB spuriousfree dynamic range (SFDR) over a bandwidth of 25 MHz. Noise performance is also exceptional; typical signal-to-noise ratio is 68 dB. The AD6640 is built on Analog Devices’ high speed complementary bipolar process (XFCB) and uses an innovative multipass architecture. Units are packaged in a 44-terminal Plastic Thin Quad Flatpack (TQFP) specif...