參數(shù)資料
型號: TVP3010-170
廠商: Texas Instruments, Inc.
英文描述: Hardware Cursor, GAMMA Correction VIP(170MHz,高/寬光標,伽馬校正,視頻接口調(diào)色板)
中文描述: 硬件光標,伽瑪校正貴賓(170MHz的,高/寬光標,伽馬校正,視頻接口調(diào)色板)
文件頁數(shù): 48/100頁
文件大?。?/td> 571K
代理商: TVP3010-170
2–34
2.13 Analog Output Specifications
The DAC outputs are controlled by three current sources (only two for IOR and IOB) as shown in
Figure 2–13. The default condition is to have 0-IRE difference between blank and black levels, which is
shown in Figure 2–15. If a 7.5-IRE pedestal is desired, it can be selected by setting bit 4 of the general-control
register. This video output is shown in Figure 2–14.
SYNC
(IOG Only)
Blank
G0 – G7
15 pF
RL
AVDD
IOG
C
(stray+load)
Figure 2–13. Equivalent Circuit of the Current Output (IOG)
A resistor (R
SET
) is needed between the FS ADJUST terminal and GND to control the magnitude of the
full-scale video signal. The IRE relationships in Figures 2–14 and 2–15 are maintained regardless of the
full-scale output current.
The relationship between R
SET
and the full scale output current IOG is:
R
SET
(
) = K1
×
V
ref
(V)/IOG (mA)
The full-scale output current on IOR and IOB for a given R
SET
is:
IOR, IOB (mA) = K2
×
V
ref
(V)/R
SET
(
)
where K1 and K2 are defined as:
PEDESTAL
IOG
IOR, IOB
8-BIT OUTPUT
K1 = 11,294
6-BIT OUTPUT
K1 = 11,206
8-BIT OUTPUT
K2 = 8,067
6-BIT OUTPUT
K2 = 7,979
7.5 IRE
0 IRE
K1 = 10,684
K1 =10,600
K2 = 7,462
K2 = 7,374
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