LTC2223 Linear Technology, LTC2223 Datasheet - Page 18

• Manufacturer Part Number: LTC2223
• Description: (LTC2222 / LTC2223) 105Msps/80Msps ADCs
• Manufacturer: Linear Technology

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LTC2222/LTC2223
APPLICATIO S I FOR ATIO
18
ANALOG
INPUT
AMPLIFIER = LTC6600-20, LT1993, ETC.
ANALOG
Input Frequencies Between 100MHz and 250MHz
INPUT
Figure 6. Recommended Front End Circuit for
Figure 4. Differential Drive with an Amplifier
0.1µF
0.1µF
DIFFERENTIAL
T1 = MA/COM ETC1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
HIGH SPEED
AMPLIFIER
CM
–
+
T1
U
–
+
25Ω
25Ω
25Ω
25Ω
3pF
U
0.1µF
12Ω
12Ω
3pF
W
2.2µF
12pF
V
A
A
CM
IN
IN
2.2µF
+
–
8pF
V
A
A
CM
IN
IN
LTC2222/23
+
–
LTC2222/23
U
22223 F04
22223 F06
ANALOG
INPUT
ANALOG
Input Frequencies Between 250MHz and 500MHz
INPUT
Figure 7. Recommended Front End Circuit for
0.1µF
0.1µF
T1 = MA/COM ETC1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
0.1µF
Figure 5. Single-Ended Drive
T1
1k
1k
25Ω
25Ω
25Ω
25Ω
0.1µF
0.1µF
12pF
2.2µF
2.2µF
V
A
A
CM
IN
IN
V
A
A
CM
IN
IN
+
–
+
–
LTC2222/23
LTC2222/23
22223 F05
22223 F07
22223fa