Digital Oscilloscope With A High-speed Adc Circuit Chip

With the rapid development of semiconductor technology, integrated circuit has stepped into a new era of SOC.High-speed, low-power A/D converters are widely used as analog IP, especially in SOC for communication and video processing.This project is an 8-bit, monolithic analog-to-digital converter optimized for high speed and low power consumption.Small in size and easy to use, the product operates at a 250 MSPS conversion rate,with excellent linearity and dynamic performance over its full operating range.The HWD9480uses a 1.5 bit per stage architecture.The analog inputs drive an integrated high bandwidth track-and-hold circuit that samples the signal prior to quantization by the 8-bit core.For ease of use,the part includes an on-board reference and input logic that accepts TTL, CMOS, or LVPECL levels. The digital output logic levels are LVDS (ANSI 644 compatible).To minimize system cost and power dissipation, This project includes an internal reference and track-and-hold circuit.The user only provides a 3.3 V power supply and a differential encode clock.No external reference or driver components are required for many applications. A stable and accurate 1.0 V reference is built into the AD9480.Users can choose this internal reference or provide an externalreference for greater accuracy and flexibility.The digital outputs are LVDS, compatible with an option of twos complement or binary output format.The output data bits are provided in parallel fashion along with an LVDS output clock, which simplifies data capture。Fabricated on an advanced BiCMOS process. An LVDS data clock is available at DCO+ and DCO?. These clocks can facilitate latching off-chip, providing a low skew clocking solution.This project is available in a 44-lead surface-mount package (TQFP) specified over the industrial temperature range (-40°C to +85°C).In the end, the layout of the chip is designed in 0.35um CMOS process and the whole layout is realized by Full-custom.