AD942AR

GENERAL DESCRIPTION

The AD9434is a 12-bit monolithic sampling analog-to-digital converter (ADC) optimized for high performance, low power, and ease of use. The part operates at up to a 500 MSPS conversion rate and is optimized for outstanding dynamic performance in wideband carrier and broadband systems. All necessary functions, including a sample-and-hold and voltage reference, are included on the chip to provide a complete signal conversion solution. The VREF pin can be used to monitor the internal reference or provide an external voltage reference (external reference mode must be enabled through the SPI port).

FEATURES

SNR = 65 dBFS at fIN up to 250 MHz at 500 MSPS
ENOB of 10.5 bits at fIN up to 250 MHz at 500 MSPS (−1.0 dBFS)
SFDR = 78 dBc at fIN up to 250 MHz at 500 MSPS (−1.0 dBFS)
Integrated input buffer
Excellent linearity
DNL = ±0.5 LSB typical
INL = ±0.6 LSB typical
LVDS at 500 MSPS (ANSI-644 levels)
1 GHz full power analog bandwidth
On-chip reference, no external decoupling required
Low power dissipation
690 mW at 500 MSPS—LVDS SDR mode
660 mW at 500 MSPS—LVDS DDR mode
Programmable (nominal) input voltage range
1.18 V p-p to 1.6 V p-p, 1.5 V p-p nominal
1.8 V analog and digital supply operation
Selectable output data format (offset binary, twos
complement, Gray code)
Clock duty cycle stabilizer
Integrated data clock output with programmable clock and
data alignment

APPLICATIONS

Wireless and wired broadband communications
Cable reverse path
Communications test equipment
Radar and satellite subsystems
Power amplifier linearization