參數(shù)資料
型號: 935272702518
廠商: NXP SEMICONDUCTORS
元件分類: ADC
英文描述: 3-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP144
封裝: 20 X 20 MM, 1.40 MM HEIGHT, LEAD FREE, PLASTIC, SOT-486-1, LQFP-144
文件頁數(shù): 20/61頁
文件大小: 326K
代理商: 935272702518
2004 May 18
27
Philips Semiconductors
Product specication
Triple 8-bit video ADC up to 270 Msps
TDA8754
9.5
Fine registers (R, G and B)
Fine gain control is done with 3 bits allowing 8 intermediate values between two values of consecutive coarse gain.
Table 19 Fine gain registers (02h, 05h, 08h) bit allocation
Table 20 Fine gain registers (02h, 05h, 08h) bit description
Table 21 Fine gain control bits (example for coarse register value 32)
69
1000101
0.706
1.416
70
1000110
0.698
1.432
::
:
95
1011111
0.500
2.000
REGISTER
76543210
FINER (02h)
FR2
FR1
FR0
FINEG (05h)
FG2
FG1
FG0
FINEB (08h)
FB2
FB1
FB0
Default
X
0
BIT
SYMBOL
DESCRIPTION
FINER (address: 02h)
7 to 3
not used
2 to 0
FR[2:0]
ne gain of the AGC for R channel
FINEG (address: 05h)
7 to 3
not used
2 to 0
FG[2:0]
ne gain of the AGC for G channel
FINEB (address: 08h)
7 to 3
not used
2 to 0
FB[2:0]
ne gain of the AGC for B channel
DECIMAL VALUE
FR2
FR1
FR0
FINE STEPS OF GAIN ADC
FG2
FG1
FG0
FB2
FB1
FB0
0
1.000
1
0
1
1.001
2
0
1
0
1.002
3
0
1
1.003
4
0
1.004
DECIMAL
VALUE
CR6
CR5
CR4
CR3
CR2
CR1
CR0
Vi TO BE FULL-SCALE
GAIN ADC
CG6
CG5
CG4
CG3
CG2
CG1
CG0
CB6
CB5
CB4
CB3
CB2
CB1
CB0
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