1.8V, Low-Power, 12-Bit, 250Msps
ADC for Broadband Applications
AVCC
INP
CP
900Ω
900Ω
INN
CP
CS IS THE SAMPLING CAPACITANCE
CP IS THE PARASITIC CAPACITANCE ~ 1pF
INP
VCM
INN
GND
INP - INN
T/H
MAX1215N
CS
12-BIT PIPELINE
ADC
CS
FROM CLOCK-
MANAGEMENT BLOCK
TO COMMON MODE
VCM + VFS / 4
VCM - VFS / 4
+VFS / 2
GND
Figure 2. Simplified Analog Input Architecture and Allowable Input Voltage Range
-VFS / 2
______________________________________________________________________________________ 11