Specifications

Parameter Units CS4218 CS4216
Passband Hz 0-0.4Fs 0-0.45Fs
Passband Ripple dB
± 0.1 ± 0.2
Transition Band Hz 0.4-0.6Fs 0.45-0.55
Stop Band Hz 0.6Fs 0.55Fs
Stop Band Rejection dB 74dB 80dB
Group Delay sec 8/Fs 16/Fs
TABLE A1: Decimation Filter Comparison
Parameter Units CS4218 CS4216
Passband Hz 0-0.4Fs 0-0.45Fs
Passband Ripple dB
± 0.1 ± 0.1
Transition Band Hz 0.4-0.6Fs 0.45-0.55 Fs
Stop Band Hz 0.6Fs 0.55Fs
Stop Band Rejection dB 74dB 74dB
Group Delay sec 8/Fs 16/Fs
TABLE A2: Interpolation Filter comparison
Digital Power Supplies and Input Logic Levels
The CS4218 and CS4216 both require that the analog power supply be 5V +/- 0.25V.
The CS4218 digital power supply can operate from 5V +/- 0.25V and 3.3V +/- 0.3V. When operated
from a 5V supply, the CS4218 is TTL and CMOS compatible inputs & outputs. When operated from a
3.3V power supply, the CS4218 is LVTTL and LVCMOS compatible.
In comparison, the CS4216 operates from a 5V +/- 0.25V power supply. It provides only CMOS logic
level inputs. The CS4216 requires level-translation logic (using the 74HCT family) when interfacing
it’s inputs with TTL logic.
CS4218
DS135F1 39