The DG411/883 series monolithic CMOS analog switches
are drop-in replacements for the popular DG211 and DG212
series devices. They include four independent single pole
throw (SPST) analog switches, and TTL and CMOS
compatible digital inputs.
These switches feature lower analog ON-resistance (<35Ω)
and faster switch time (tON <175ns) compared to the DG211
or DG212. Charge injection has been reduced, simplifying
sample and hold applications.
The improvements in the DG411/883 series are made
possible by using a high voltage silicon-gate process. An
epitaxial layer prevents the latch-up associated with older
CMOS technologies. The 44V maximum voltage range
permits controlling 40VP-P signals. Power supplies may be
single-ended from +5V to +34V, or split from ±5V to ±20V.
The four switches are bilateral, equally matched for AC or
bidirectional signals. The ON-resistance variation with analog
signals is quite low over a ±15V analog input range. This
permits independent control of turn-on and turn-off times for
SPDT configurations, permitting “break-before-make” or
“make-before-break” operation with a minimum of external logic.