参数资料
型号: AD8148ACPZ-R2
厂商: Analog Devices Inc
文件页数: 9/24页
文件大小: 0K
描述: IC DRIVER TRPL DIFF VID 24LFCSP
标准包装: 1
应用: 差分
输出类型: 差分
电路数: 3
-3db带宽: 900MHz
转换速率: 3000 V/µs
电流 - 电源: 62.5mA
电流 - 输出 / 通道: 87mA
电压 - 电源,单路/双路(±): 4.5 V ~ 11 V,±2.25 V ~ 5.5 V
安装类型: 表面贴装
封装/外壳: 24-VFQFN 裸露焊盘,CSP
供应商设备封装: 24-LFCSP-VQ(4x4)
包装: 标准包装
产品目录页面: 765 (CN2011-ZH PDF)
其它名称: AD8148ACPZ-R2DKR
Data Sheet
AD8146/AD8147/AD8148
Rev. B | Page 17 of 24
–OUT R
+OUT R
–OUT G
+OUT G
–OUT B
+OUT B
VOCM WEIGHTING EQUATIONS:
RED VOCM = K(VSYNC – HSYNC) + VMIDSUPPLY
GREEN VOCM = K(–2VSYNC) + VMIDSUPPLY
BLUE VOCM = K(VSYNC + HSYNC) + VMIDSUPPLY
+IN R
–IN R
VSYNC
HSYNC
SYNC LEVEL
+IN G
–IN G
+IN B
–IN B
R
1k
AD8147/AD8148
500
G
1k
500
VOCM
VOCM B
1k
500
OPD
×2
2
09327-
008
Figure 30. AD8147/AD8148 Sync-On Common-Mode Encoding Scheme
0
0.5
1.0
1.5
2.0
4.0
3.5
4.5
2.5
3.0
5.0
0.98
0.99
1.00
1.01
1.03
1.04
1.05
1.02
1.06
1.07
TIME (s)
HSYNC
VSYNC
2.0
2.1
2.2
2.3
2.4
2.9
2.8
3.0
2.5
2.6
2.7
3.1
R
G
B
V
OLTS
V
OLTS
09327-
009
Figure 31. AD8147 Sync-On Common-Mode Signals in Single 5 V Application
The transmitted common-mode sync signal magnitudes are
scaled by applying a dc voltage to the SYNC LEVEL input,
referenced to GND. The difference between the voltage applied
to the SYNC LEVEL input and GND sets the peak deviation of
the encoded sync signals about the midsupply, common-mode
voltage. For example, with the SYNC LEVEL input set at 500 mV,
the deviation of the encoded sync pulses about the nominal
midsupply, common-mode voltage is typically ±500 mV. The
equations in Figure 30 describe how the VSYNC and HSYNC signals
are encoded on each color’s midsupply common-mode signal.
In these equations, the weights of the VSYNC and HSYNC signals
are ±1 (+1 for high and 1 for low), and the constant K is equal
to the peak deviation of the encoded sync signals.
Figure 31 shows how the sync signals appear on each common-
mode voltage in a single 5 V supply application when the voltage
applied to the SYNC LEVEL input is 500 mV, which is the
typical setting for most applications.
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