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| 型号： | XRD98L23UEVAL |
| 厂商： | Exar Corporation |
| 文件页数： | 1/32页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD XRD98L23ACU |
| 标准包装： | 1 |
| 系列： | * |
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EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
(510) 668-7000 FAX (510) 668-7017 www.exar.com
XRD98L23
8-Bit, High-speed Linear CIS/CCD Sensor
Signal Processor with Serial Control
November 2002-2
FEATURES
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 Compatibility
Internal Clamp for CIS or CCD AC Coupled
Configurations
3.3V Operation & I/O Compatibility
Serial Load Control Registers
Low Power CMOS: 75mW-typ
Low Cost 20-Lead Packages
USB Compliant
APPLICATIONS
Check Scanners
General Purpose CIS or CCD Imaging
Low Cost Data Acquisition
Simple and Direct Interface to Canon 600 DPI
Sensors
ORDERING INFORMATION
PackageType
TemperatureRange
PartNumber
20-Lead SOIC
0°C to +70°C
XRD98L23ACD
20-LeadSSOP
0°C to +70°C
XRD98L23ACU
GENERAL DESCRIPTION
The XRD98L23 is a complete 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 adjust-
ment of 1 to 10, and a typical 8-bit programmable input
referred offset calibration range of 480mV.
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.
Rev. 1.00
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