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參數(shù)資料
| 型號： | HT82V24 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 16-Bit, 15MSPS, 3-Channel CCD/CIS Analog Signal Processor |
| 中文描述： | 16位，15MSPS，3通道防治荒漠化公約/獨(dú)聯(lián)體模擬信號處理器 |
| 文件頁數(shù)： | 9/21頁 |
| 文件大?。?/td> | 216K |
| 代理商： | HT82V24 |
HT82V24
Rev. 1.00
9
September 7, 2005
D8
D7
D6
D5
D4
D3
D2
D1
D0
Gain
(V/V)
Gain (dB)
Set to 0
Set to 0
Set to 0
MSB
LSB
1.0
1.039
.
.
.
5.57
6
0.0
0.33
.
.
.
14.9
15.6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
0
0
.
.
.
1
1
0
0
1
1
0
0
1
1
0*
1
0
1
PGA Gain Register Settings
Note: * Power-on default value
Offset Registers
There are three offset registers for use in individually programming the offset in the red, green, and blue channels. Bits
D8 through D0 control the offset range from 300mV to 300mV in 512 increments.
The coding for the offset registers is sign magnitude, with D8 as the sign bit. The following table shows the offset range
as a function of the bits D8 through D0.
D8
D7
D6
D5
D4
D3
D2
D1
D0
Offset
(mV)
MSB
LSB
0
0
0
1
1
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
1
0
0
.
.
.
1
0
0
.
.
.
1
0
0
1
0
0
1
0
0
1
0
0
1
0*
1
1
0
1
1
0
1.17
.
.
.
300
0
1.17
.
.
.
300
Note: * Power-on default value
PGA Gain Registers
There are three PGAregisters for use in individually pro-
gramming the gain in the red, green and blue channels.
Bits D8, D7 and D6 in each register must be set low, and
bits D5 through D0 control the gain range in 64 incre-
ments. See figure for a graph of the PGA gain versus
PGAregister code. The coding for the PGAregisters is a
straight binary, with an all zero words corresponding to
the minimum gain setting (1x) and an all one word corre-
sponding to the maximum gain setting (6x).
The HT82V24 uses one Programmable Gain Amplifier
(PGA) for each channel. Each PGA has a gain range
from 1x (0dB) to 6x (15.6dB), adjustable in 64 steps.
TheFigureshowsthePGAgainasafunctionofthePGA
register code. Although the gain curve is approximately
linear in dB, the gain in V/V varies in nonlinear propor-
tion with the register code, according to the following the
6
4.85x(63
+
equation: Gain=
1
G
63
)
-
Where G is the decimal value of the gain register con-
tents, and varies from 0 to 63.
/
2
1 2
& 2
2
/ 2
2
"
<
%
"
*
PGA Gain Transfer Function
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