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XRD8775 Datasheet(PDF) 1 Page - Exar Corporation

Part No. XRD8775
Description  CMOS 8-Bit High Speed Analog-to-Digital Converter
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Maker  EXAR [Exar Corporation]
Homepage  http://www.exar.com

XRD8775 Datasheet(HTML) 1 Page - Exar Corporation

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EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
• (510) 668-7000 • FAX (510) 668-7017
Rev. 4.00
CMOS 8-Bit High Speed
Analog-to-Digital Converter
April 2002-4
· 8-Bit Resolution
· Up to 20MHz Sampling Rate
· Internal S/H Function
· Single Supply: 5V
· V
IN DC Range: 0V to VDD
· V
REF DC Range: 1V to VDD
· Low Power: 75mW typ. (excluding reference)
· Latch-Up Free
· ESD Protection: 2000V Minimum
· 3V Version: XRD87L75
· Small 20-Pin SOIC/SSOP Packages
· Digital Color Copiers
· Cellular Telephones
· CCD-Based Systems
· Hardware Scanners
· Video Capture Boards
The XRD8775 is an 8-bit Analog-to-Digital Converter in
a small 20-pin SOIC/SSOP package. Designed using
an advanced 5V CMOS process, this part offers excel-
lent performance, low power consumption and latch-up
free operation.
This device uses a two-step flash architecture to
maintain low power consumption at high conversion
rates. The input circuitry of the XRD8775 includes an
on-chip S/H function and allows the user to digitize
analog input signals between AGND and AV
DD. Careful
design and chip layout have achieved a low analog input
capacitance. This reduces “kickback” and eases the
requirements of the buffer/amplifier used to drive the
The designer can choose the internally generated
reference voltages by connecting V
RB to VRBS and VRT to
RTS , or provide external reference voltages to the VRB
and V
RT pins. The internal reference generates 0.6V at
RB and 2.6V at VRT. Providing external reference
voltages allows easy interface to any input signal range
between GND and V
DD. This also allows the system to
adjust these voltages to cancel zero scale and full
scale errors, or to change the input range as needed.
The device operates from a single +5V supply. Power
consumption is 75mW at F
S = 15MHz.
Specified for operation over the commercial / industrial
(-40 to +85°C) temperature range, the XRD8775 is
available in Surface Mount (SOIC), Shrink Small Out-
line (SSOP) and Plastic Dual-In-line (PDIP) Packages.

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