器件名称: AD9020PCB
功能描述: 10-Bit 60 MSPS A/D Converter
文件大小: 204.18KB 共12页
简 介:a
FEATURES Monolithic 10-Bit/60 MSPS Converter TTL Outputs Bipolar ( 1.75 V) Analog Input 56 dB SNR @ 2.3 MHz Input Low (45 pF) Input Capacitance MIL-STD-883 Compliant Versions Available APPLICATIONS Digital Oscilloscopes Medical Imaging Professional Video Radar Warning/Guidance Systems Infrared Systems
ANALOG IN 8 9 OVERFLOW +V REF 12 +V SENSE 11 R/2 512
10-Bit 60 MSPS A/D Converter AD9020
FUNCTIONAL BLOCK DIAGRAM
MSB LSBS INVERT INVERT 61 59
R 385 C R/2 3/4 REF 7 R/2 384 O M D P R A C R R 257 A R/2 1/2 REF 1 T E R/2 R O L R 129 R/2 1/4 REF 63 R/2 R 128 C H E S R 2 R 1 R/2 –V SENSE 57 –VREF 56 ENCODE 14 G A I T C H O 256 R 1024 L 10 C T OVERFLOW O L D OVERFLOW A E 51 OVERFLOW 50 D9 (MSB) 49 D8 48 D7 47 D6 46 D5 23 D4 22 D3 21 D 2 20 D1 19 D0 (LSB)
GENERAL DESCRIPTION
The AD9020 A/D converter is a 10-bit monolithic converter capable of word rates of 60 MSPS and above. Innovative architecture using 512 input comparators instead of the traditional 1024 required by other flash converters reduces input capacitance and improves linearity. Encode and outputs are TTL-compatible, making the AD9020 an ideal candidate for use in low power systems. An overflow bit is provided to indicate analog input signals greater than +VSENSE. Voltage sense lines are provided to insure accurate driving of the ± VREF voltages applied to the units. Quarter-point taps on the resistor ladder help optimize the integral linearity of the unit. Either 68-pin ceramic leaded (gull wing) packages or ceramic……
