XRD98L23 Datasheet | Exar

FEATURES APPLICATIONS - - - - - - - - - - - - - 8-Bit Resolution, No Missing Codes One-channel 10MSPS Pixel Rate Dual-channel 5MSPS Pixel Rate Three-channel 3 MSPS Pixel Rate 6-bit Programmable Gain Amplifier 8-bit Programmable Offset Adjustment CIS or CCD patibility Internal Clamp for CIS or CCD AC Coupled Configurations 3.3V Operation & I/O patibility Serial Load Control Registers Low Power CMOS: 75m W-typ Low Cost 20-Lead Packages USB pliant - - - - Check Scanners General Purpose CIS or CCD Imaging Low Cost Data Acquisition Simple and Direct Interface to Canon 600 DPI Sensors GENERAL DESCRIPTION The XRD98L23 is a plete linear CIS or CCD sensor signal processor on a single monolithic chip. The XRD98L23 includes a high speed 8-bit resolution ADC, a 6-bit Programmable Gain Amplifier with gain adjustment of 1 to 10, and a typical 8-bit programmable input referred offset calibration range of 480m V. In the CCD configuration the input signal is AC coupled with an external capacitor. An internal clamp sets the black level. In the CIS configuration, the clamp switch can be disabled and the CIS output signal is DC coupled from the CIS sensor to the XRD98L23. The CIS signal is level shifted to VRB in order to use the full range of the ADC. In the CIS configuration the input can also be AC coupled similar to the CCD configuration. This enables CIS signals with large black levels to be internally clamped to a DC reference equal to the black level. The DC reference is internally subtracted from the input signal. The CIS configuration can also be used in other applications that do not require CDS function, such as low cost data acquisition. ORDERING INFORMATION Package Type 20-Lead SOIC 20-Lead SSOP Temperature Range 0°C to +70°C 0°C to +70°C Part Number XRD98L23ACD XRD98L23ACU Rev. 1.00 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 - (510) 668-7000 - FAX (510) 668-7017 - .exar. CIS REF Circuit AVDD RED CLAMP CIS REF Circuit Triple S/H & 3-1...