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參數(shù)資料
| 型號： | XRD9818ACG |
| 廠商： | EXAR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | 3-CHANNEL 16-BIT LINEAR CCD/CIS SENSOR SIGNAL PROCESSOR |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| 封裝： | 4.40 MM, TSSOP-28 |
| 文件頁數(shù)： | 17/28頁 |
| 文件大?。?/td> | 496K |
| 代理商： | XRD9818ACG |
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XRD9818
3-CHANNEL 16-BIT LINEAR CCD/CIS SENSOR SIGNAL PROCESSOR
REV. 1.0.1
17
4.1.2
4.1.2.1
In CCD mode a clamp is required to level shift the CCD output signal into XRD9818’s input common mode
range. The clamp circuitry ensures that the signals present at the analog inputs fall within the operating range
of those pins. The clamp operation takes place while BSAMP is active. When BSAMP is active, SW1 is closed
connecting the C/R DAC to the analog input pin. This establishes the C/R DAC voltage on the external
coupling cap. When SW1 is opened, the C/R DAC voltage is stored on the external coupling cap. This clamping
operation will occur while BSAMP is active. The C/R DAC clamp voltage is programmable. This gives the
system designer added flexibility to make adjustments for different sensor signal swing and reset pulse
characteristics.
Clamp/Reference (C/R) DAC
Clamp Operation in CCD Mode
The XRD9818 has 2 clamp modes available for used in CCD applications, Line Clamp and Pixel Clamp.
Line Clamp mode only performs the clamp when the LCLMP pin is active. The control timing,
φ
CL
, for SW1 is
generated by the “ANDing” of the external timing signals LCLMP & BSAMP and is shown in Figure 6.
F
IGURE
5. CCD
MODE
I
NPUT
C
LAMP
(
ALL
THREE
CHANNELS
ARE
IDENTICAL
)
F
IGURE
6. L
INE
C
LAMP
M
ODE
T
IMING
φ
R
φ
R
φ
CL
C/R DAC
to PGA
CMN-
RED+
CL[2]
CL[1]
CL[0]
C1
C2
Clamp/Reference DAC
SW1
SW2
RED+
SW3
0.1uf
CCD
ouput
C
IN
C
REF
1nf
CCD
IN
ADCLK
BSAMP
VSAMP
φ
CL
LCLMP
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XRD9818ACG-F | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| XRD9818ACGTR | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| XRD9818ACGTR-F | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| XRD9818EVAL | 功能描述:數(shù)據(jù)轉換 IC 開發(fā)工具 XRD9818 EVAL BOARD RoHS:否 制造商:Texas Instruments 產品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| XRD9820 | 制造商:EXAR 制造商全稱:EXAR 功能描述:3-Channel, 10/12-Bit Linear CCd and CIS Sensor signal Processors |
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