AD8188ARUZ Analog Devices Inc, AD8188ARUZ Datasheet - Page 18

• Manufacturer Part Number: AD8188ARUZ
• Description: IC,ANALOG MUX,TRIPLE,2-CHANNEL,TSSOP,24PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Type: Analog Multiplexerr

Specifications of AD8188ARUZ

• Function: Multiplexer
• Circuit: 3 x 2:1
• On-state Resistance: 350 mOhm
• Voltage Supply Source: Single Supply
• Voltage - Supply, Single/dual (±): 3.5 V ~ 5.5 V
• Current - Supply: 15mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP (0.173", 4.40mm Width)
• Package: 24TSSOP
• Multiplexer Architecture: 2:1
• Maximum Turn-off Time: 17(Typ)@5V ns
• Maximum Turn-on Time: 4(Typ)@5V ns
• Power Supply Type: Single
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD8188/AD8189
The circuit in Figure 55 can increase the crosstalk between
inputs, because each input signal creates a small signal on V
due to its nonzero impedance. There are several means to
minimize this. First, make the impedance of the V
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.
SOURCE A
SOURCE B
SOURCE A
SOURCE B
RGB
RGB
RGB
RGB
R
G
B
R
G
B
R
G
B
R
G
B
100Ω
100Ω
5V
75Ω
75Ω
75Ω
0.1µF
Figure 54. AD8188 AC-Coupling Using Separate Voltage Dividers
Figure 55. AD8188 AC-Coupling Using a Single V
0.1µF
0.1µF
0.1µF
75Ω
75Ω
75Ω
75Ω
75Ω
75Ω
V
4.99kΩ
4.99kΩ
4.99kΩ
MID
10µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
75Ω
75Ω
75Ω
MID
divider
0.1µF
0.1µF
0.1µF
5V
5V
V
V
V
V
V
V
MID
MID
MID
MID
MID
MID
4.99kΩ
4.99kΩ
4.99kΩ
4.99kΩ
4.99kΩ
4.99kΩ
4.99kΩ
4.99kΩ
4.99kΩ
4.99kΩ
4.99kΩ
MID
5V
Rev. 0 | Page 18 of 24
4.99kΩ
5V
5V
4.99kΩ
4.99kΩ
LO = B
LO = B
HI = A
HI = A
5V
4.99kΩ
D
D
IN0A
IN0B
IN1A
IN1B
IN2A
IN2B
SEL A/B
V
IN0A
IN0B
IN1A
IN1B
IN2A
IN2B
SEL A/B
V
The second technique for minimizing crosstalk is to use large
resistor values to connect from the inputs to V
limiting the value of these resistors is offset caused by the input
bias current (I
AD8188 inputs. The typical I
which causes an offset voltage of 1.5 mV per 1 kΩ of resistance.
GND
GND
REF
REF
DV
DV
5V
5V
V
V
CC
CC
EE
EE
0.1µF
0.1µF
MID
Reference
V
V
B
5V
5V
) that must flow through these resistors to the
CC
+
–
+
–
+
–
CC
+
–
+
–
+
–
AD8188
AD8188
0.1µF
0.1µF
HI = ENABLE
LO = DISABLE
HI = ENABLE
LO = DISABLE
OUT0
OUT1
OUT2
OE
OUT0
OUT1
OUT2
OE
10µF
10µF
B
for an AD8188 input is 1.5 μA,
TO A/D,
ETC.
TO A/D,
ETC.
MID
. The major factor