XRD87L85 Datasheet | Exar

FEATURES - 8-Bit Resolution - Up to 10 MHz Sampling Rate - Internal S/H Function - Single Supply: 3.3V - VIN DC Range: 0V to VDD - VREF DC Range: 1V to VDD - Low Power: 25m W typ. (excluding reference) - Latch-Up Free - ESD Protection: 2000V Minimum - 20-Pin Package Available: XRD87L75 APPLICATIONS - Digital Color Copiers - Cellular Telephones - CCDs and Scanners - Video Capture Boards GENERAL DESCRIPTION The XRD87L85 is an 8-bit Analog-to-Digital Converter. Designed using an advanced 3.3V CMOS process, this part offers excellent 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 XRD87L85 includes an on-chip S/H function which allows the user to digitize analog input signals between AGND and AVDD. 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 XRD87L85. The designer can choose the internally generated reference voltages by connecting VRB to VRBS and VRT to VRTS, or provide external reference voltages to the VRB and VRT pins. The internal reference generates 0.4V at VRB and 1.72V at VRT. Providing external reference voltages allows easy interface to any input signal range between AGND and AVDD. 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 +3.3V supply. Power consumption is 25m W at FS = 6MHz. Specified for operation over the mercial/industrial (- 40 to +85°C) temperature range, the XRD87L85 is available in Plastic Dual-in-line (PDIP), Surface Mount (SOIC) and Small Outline (SOP) packages in EIAJ and JEDEC. SIMPLIFIED BLOCK AND TIMING DIAGRAM Rev. 1.00 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 - (510) 668-7000 - FAX (510) 668-7017 ORDERING INFORMATION Pac...