VEE DGND IN2B IN2A " />
參數(shù)資料
型號: AD8189ARUZ
廠商: Analog Devices Inc
文件頁數(shù): 10/24頁
文件大小: 0K
描述: IC MULTIPLEXER TRPL 2X1 24TSSOP
標準包裝: 62
功能: 多路復用器
電路: 3 x 2:1
電壓電源: 單電源
電壓 - 電源,單路/雙路(±): 3.5 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應商設(shè)備封裝: 24-TSSOP
包裝: 管件
AD8188/AD8189
Rev. 0 | Page 18 of 24
VEE
DGND
IN2B
IN2A
IN0A
IN0B
IN1A
DVCC
OE
VCC
SEL A/B
AD8188
5V
VREF
IN1B
TO A/D,
ETC.
+
+
+
10F
0.1F
OUT0
OUT1
OUT2
RGB
SOURCE A
R
G
B
RGB
SOURCE B
R
G
B
4.99k
5V
0.1F
4.99k
75
0.1F
4.99k
75
0.1F
4.99k
75
0.1F
4.99k
75
0.1F
4.99k
75
0.1F
4.99k
75
HI = ENABLE
LO = DISABLE
HI = A
LO = B
4.99k
5V
4.99k
5V
4.99k
5V
4.99k
5V
4.99k
5V
0
62
39
-0
53
Figure 54. AD8188 AC-Coupling Using Separate Voltage Dividers
VEE
DGND
IN2B
IN2A
IN0A
IN0B
IN1A
DVCC
OE
VCC
SEL A/B
AD8188
5V
VREF
IN1B
TO A/D,
ETC.
+
+
+
10F
0.1F
OUT0
OUT1
OUT2
RGB
SOURCE A
R
G
B
RGB
SOURCE B
R
G
B
0.1F
75
0.1F
75
0.1F
75
0.1F
75
0.1F
75
0.1F
75
HI = ENABLE
LO = DISABLE
HI = A
LO = B
100
0.1F
10F
5V
VMID
4.99k
VMID
4.99k
VMID
4.99k
VMID
4.99k
VMID
4.99k
VMID
4.99k
VMID
06
23
9-
0
54
Figure 55. AD8188 AC-Coupling Using a Single VMID Reference
The circuit in Figure 55 can increase the crosstalk between
inputs, because each input signal creates a small signal on VMID
due to its nonzero impedance. There are several means to
minimize this. First, make the impedance of the VMID divider
small. Small resistor values lower the dc resistance, and good
bypassing to ground minimizes the ac impedance. It is also
possible to use a voltage regulator or another system supply
voltage if it is the correct value. It should be close to the mid-
supply voltage of the AD8188.
The second technique for minimizing crosstalk is to use large
resistor values to connect from the inputs to VMID. The major factor
limiting the value of these resistors is offset caused by the input
bias current (IB) that must flow through these resistors to the
AD8188 inputs. The typical IB for an AD8188 input is 1.5 μA,
which causes an offset voltage of 1.5 mV per 1 kΩ of resistance.
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