'Dual ADC' related articles 1

  1. 2007/01/16 AD15452 - 12-Bit, 65 MSPS, Dual ADC
FEATURES
12-bit, 65 MSPS dual ADC
Differential input with 100 Ω input impedance
Full-scale analog input: 296 mV p-p
170 MHz, 3 dB bandwidth
SNR (−9 dBFS): 64 dBFS (70 MHz AIN), 64 dBFS (140 MHz AIN)
SFDR (−9 dBFS): 77 dBFS (70 MHz AIN), 73 dBFS (140 MHz AIN)
435 mW per channel
Dual parallel output buses
Out-of-range indicators
Independent clocks
Duty cycle stabilizer
Twos complement or offset binary data format

APPLICATIONS
Antijam GPS receivers Wireless and wired broadband communications Communications test equipment

GENERAL DESCRIPTION
The AD15252 is a dual, 12-bit, 65 MSPS, analog-to-digital converter (ADC). It features a differential front-end amplification circuit followed by a sample-and-hold amplifier and multistage pipeline ADC. It is designed to operate with a 3.3 V analog supply and a 2.5 V/3.3 V digital supply. Each input is fully differential, ac-coupled, and terminated in 100 Ω input impedances. The full-scale differential signal input range is 296 mV p-p.
Two parallel, 12-bit digital output buses provide data flow from the ADCs. The digital output data is presented in either straight binary or twos complement format. Out-of-range (OTR) signals indicate an overflow condition, which can be used with the most significant bit to determine low or high overflow. Dual single-ended clock inputs control all internal conversion cycles. A duty cycle stabilizer allows wide variations in the clock duty cycle while maintaining excellent performance. The AD15252 is optimized for applications in antijam global positioning receivers and is well suited for communications applications.

AD15252BBC AD15252/PCB
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