Canon XRD9827REF

... the analog plus comp

EXAR Corporation 48720 Kato Road, Fremont, CA 94538 Phone (510)-668-7000, Fax (510)-668-7030

PRELIMINARY

CANON CVA-60216K 600DPI COLOR CIS

XRD9827

FIFO

SRAM

FIFO

SRAM

INTEL 486 Compatible

MACH435 CPLD

PARALLEL

PORT DB25

CONNECTOR

CIS CONTROL SIGNALS

8-BIT DATA

DATA

8-BIT DATA

6-BIT BUS NIBBLE

XRD9827 CONTROL SIGNALS

PARALLEL PORT CONTROL

CIS OUTPUT

CIS REFERENCE

VOLTAGE

Figure 1. Block Diagram of XRD9827REF

The XRD9827 is a complete linear CIS or CCD sensor signal processor on a single monolithic chip. The

XRD9827 includes a high speed 12-Bit ADC, a 6-Bit Programmable Gain Amplifier with gain adjustment

of 1 to 10 and an 8-Bit programmable input referred offset calibration range of 800 mV. The XRD9827

also provides the necessary biasing voltage for the CANON CIS, eliminating the use of external

components (two diodes and two resistors). See the XRD9827EVAL User Manual / PCB board for

evaluating the XRD9827 CIS / CCD signal processor chip. A simplified functional block diagram of

XRD9827 is shown below for your reference.