参数资料
型号: XRD9825EVAL
厂商: Exar Corporation
文件页数: 32/33页
文件大小: 0K
描述: EVAL BOARD FOR XRD9825
标准包装: 1
系列: *
XRD9825
8
Rev. 1.00
THEORY OF OPERATION
CIS Configuration (Contact Image Sensor)
The XRD9825 has two configurations for CIS applica-
tions. Each configuration is set by the control registers
accessed through the serial port.
Mode 1. DC Coupled
If the CIS does not have leading or trailing black pixels
as shown in Figure 2, then DC couple the CIS output to
the XRD9825 input.
Optically Shielded
Pixels
Valid Pixels
Figure 2. Typical Output CIS Mode
Adjust the offset of the CIS (-100 mV to 500 mV) by
setting the internal registers of the XRD9825 to set the
black pixel value when the LEDs of the CIS are off.
When the LEDs are on, use the XRD9825 Program-
mable Gain to maximize the ADCs dynamic range.
Figure 3, shows a typical application for a CIS with an
offset of -100mV to 500mV.
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XRD9826 制造商:EXAR 制造商全称:EXAR 功能描述:16-Bit Linear CIS/CCD Sensor Signal Processor with Serial Control
XRD9826ACD 制造商:EXAR 制造商全称:EXAR 功能描述:16-Bit Linear CIS/CCD Sensor Signal Processor with Serial Control
XRD9826ACD-F 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
XRD9826ACU 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
XRD9826ACU-F 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32