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參數資料
| 型號： | TLV987CPFB |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP48 |
| 封裝： | PLASTIC, TQFP-48 |
| 文件頁數： | 8/21頁 |
| 文件大小： | 285K |
| 代理商： | TLV987CPFB |
TLV987
3-V 10-BIT 27 MSPS AREA CCD SENSOR
SIGNAL PROCESSOR
SLAS211A – MARCH 1999 – REVISED SEPTEMBER 1999
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
The number of black pixels in each line and the number of lines are programmable. The number of black pixels
per line that can be averaged is equal to 2N, where N can be 0, 1, 2, 3, 4, 5, and 6. In addition, if the MP bit is
set to 1, then the number of black pixels that are averaged per line will be 3
2N. The number of lines is equal
to 2L, where L can be 0, 1, 2, 3, 4, 5, 6, 7, and 8.
The auto-calibration feature can be bypassed if the user prefers to directly program the offset DAC registers.
Switching from auto-calibration mode to direct programming mode requires two register writes. First, the control
bits for the offset DACs in the control register need to be changed, then the desired offset value for the register
is loaded into the offset DAC registers for proper error correction. If the total offset including optical black level
is less than
±255 ADC LSBs, only the FDAC needs to be programmed. When switching from the direct
programming mode to the auto-calibration mode, the previous DAC register values are used as starting offsets
rather than default DAC register values.
A detailed block diagram for internal automatic optical black and offset correction is shown in Figure 5. The
timing diagram in Figure 6 illustrates the operation of the calibration system. In the example, the TLV987 is
programmed to average four black pixels (N = 2) per line for two lines (L = 1).
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TLV987PFB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V 10-BIT 27 MSPS AREA CCD SENSOR SIGNAL PROCESSOR |
| TLV990 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V, 10-BIT, 28-MSPS AREA CCD AND VIDEO SIGNAL PROCESSOR |
| TLV990-13 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V, 10-BIT, 13-MSPS AREA CCD ANALOG FRONT END |
| TLV990-13PFB | 功能描述:視頻模擬/數字化轉換器集成電路 CCD Sig Processor/ Digitizer Designed RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉換器數量:1 ADC 輸入端數量:4 轉換速率:3 Gbps 分辨率:8 bit 結構: 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
| TLV990-13PFBG4 | 功能描述:視頻模擬/數字化轉換器集成電路 CCD Sig Processor/ Digitizer Designed RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉換器數量:1 ADC 輸入端數量:4 轉換速率:3 Gbps 分辨率:8 bit 結構: 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
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