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Memory
All data sheets are subject to change without notice
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09.12.02 REV 1
903
High Speed Comparator
FEATURES:
• High-speed, low-power voltage comparator
RAD-PAK® radiation-hardened against
natural space radiation
Total dose hardness: 100 krad (Si) typical;
dependent upon orbit
8ns typ propagation delay
18mW power consumption (typ at +5V)
Separate analog and digital supplies
Flexible analog supply: +5V to +10V or ±5V
Input range includes negative supply rail
TTL compatible outputs
TTL compatible latch inputs
DESCRIPTION:
Maxwell Technologies’ 903 high-speed, low-
power voltage comparator features differential
analog inputs and TTL logic outputs with
active internal pull-ups. The 903 can be pow-
ered from separate analog and digital power
supplies or from a single combined supple
voltage. The analog input common-mode
range includes the negative rail, allowing
ground sensing when powered from a single
supply. When powered from +5V, the 903 con-
sumes 18mW. The 903 is equipped with a TTL
compatible latch input. The comparator output
is latched when the latch input is driven low.
Capable of surviving space environments, the
903 is ideal for satellite, spacecraft, and space
probe missions. Maxwell Technologies’ pat-
ented RAD-PAK® packaging technology incor-
porates radiation shielding in the microcircuit
package. It eliminates box shielding while pro-
viding lifetime in orbit or space mission. In
GEO orbit, RAD-PAK® provides greater than
100 krad(Si) radiation dose rate. This product
is available with screening up to Class S.
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4
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V
CC
V
EE
IN+
IN-
V
DD
LATCH
OU T
GND