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参数资料
| 型号： | AD9849AKSTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 20/32页 |
| 文件大小： | 0K |
| 描述： | IC CCD SIGNAL PROC 12BIT 48LQFP |
| 标准包装： | 1 |
| 类型： | CCD 信号处理器，12 位 |
| 输入类型： | 逻辑 |
| 输出类型： | 逻辑 |
| 接口： | 3 线串口 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 托盘 |
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REV. A
AD9848/AD9849
–27–
PxGA
The PxGA provides separate gain adjustment for the individual
color pixels. A programmable gain amplifier with four separate
values, the PxGA has the capability to “multiplex” its gain value on
a pixel-to-pixel basis (see Figure 17). This allows lower output
color pixels to be gained up to match higher output color pixels.
Also, the PxGA may be used to adjust the colors for white balance,
reducing the amount of digital processing that is needed. The
four different gain values are switched according to the “Color
Steering” circuitry. Seven different color steering modes for
different types of CCD color filter arrays are programmed in the
AD9848/AD9849 AFE Register, ctlmode, at Address 0x06 (see
Figures 16a to 16g for timing examples). For example, Mosaic
Separate steering mode accommodates the popular “Bayer”
arrangement of Red, Green, and Blue filters (see Figures 18a
and 18b).
COLOR
STEERING
CONTROL
4:1
MUX
3
GAIN0
GAIN1
GAIN2
GAIN3
PxGA
PxGA STEERING
MODE
SELECTION
2
6
VD
HD
PxGA GAIN
REGISTERS
CONTROL
REGISTER
BITS D0–D2
SHP/SHD
VGA
CDS
Figure 17. PxGA Block Diagram
RGr
Gb
B
Gb
B
RGr
Gb
B
Gb
B
GAIN0, GAIN1, GAIN0, GAIN1...
LINE0
GAIN2, GAIN3, GAIN2, GAIN3...
LINE1
GAIN0, GAIN1, GAIN0, GAIN1...
LINE2
CCD: PROGRESSIVE BAYER
MOSAIC SEPARATE COLOR
STEERING MODE
Figure 18a. CCD Color Filter Example: Progressive Scan
RGr
R
Gr
RGr
R
Gr
GAIN0, GAIN1, GAIN0, GAIN1...
LINE0
GAIN0, GAIN1, GAIN0, GAIN1...
LINE1
GAIN0, GAIN1, GAIN0, GAIN1...
LINE2
CCD: INTERLACED BAYER
EVEN FIELD
VD SELECTED COLOR
STEERING MODE
Gb
B
Gb
B
Gb
B
Gb
B
Gb
B
Gb
B
Gb
B
Gb
B
GAIN2, GAIN3, GAIN2, GAIN3...
LINE0
GAIN2, GAIN3, GAIN2, GAIN3...
LINE1
GAIN2, GAIN3, GAIN2, GAIN3...
LINE2
ODD FIELD
Figure 18b. CCD Color Filter Example: Interlaced
The same Bayer pattern can also be interlaced, and the VD selected
mode should be used with this type of CCD (see Figure 18b).
The Color Steering performs the proper multiplexing of the R, G,
and B gain values (loaded into the PxGA gain registers) and is
synchronized by the user with vertical (VD) and horizontal (HD)
sync pulses. For more detailed information, see the PxGA Timing
section. The PxGA gain for each of the four channels is variable
from –2 dB to +10 dB, controlled in 64 steps through the serial
interface. The PxGA gain curve is shown in Figure 19.
PxGA GAIN REGISTER CODE
10
32
PxGA
GAIN
–
dB
40
48
58
0
8
16
24
31
8
6
4
2
0
–2
(011111)
(100000)
Figure 19. PxGA Gain Curve
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9849AKSTZRL | 功能描述:IC CCD SIGNAL PROC 12BIT 48LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| AD9849KST | 制造商:Rochester Electronics LLC 功能描述:12 BIT 25 MSPS 5V AFE & T - Tape and Reel 制造商:Analog Devices 功能描述: |
| AD9849KSTRL | 制造商:Analog Devices 功能描述:12 BIT 25 MSPS 5V AFE & T - Tape and Reel |
| AD9850 | 制造商:AD 制造商全称:Analog Devices 功能描述:CMOS, 125 MHz Complete DDS Synthesizer |
| AD9850/CGPCB | 制造商:Analog Devices 功能描述:NCO/DDS, CMOS, 125MHZ COMPLETE DDS SYNTHESIZER - Bulk |
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