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All data sheets are subject to change without notice
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Quad Comparators,
139
©2001 Maxwell Technologies
All rights reserved.
Low Offset Voltage
12.13.01 Rev11000522
FEATURES:
• Rad-Pak® technology-hardened against natural space
radiation
• Total dose hardness:
- >100 krad (Si), depending upon orbit and space mission
• Single Event Effects:
- SEL > 59.8 MeV/mg/cm
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• Package:
• - 14 pin Rad-Pak® flat package
• Wide supply voltage range
- 2 VDC to 36 VDC or ±1 VDC to ±18 VDC
• Very low supply current drain:
- (0.8 mA) - independent of supply voltage
• Low input biasing current: 25 nA
• Differential input voltage range equal to the power supply
voltage
• Low output saturation voltage: 250 mV at 4 mA
• Power drain suitable for battery operation
• Allows sensing near GND
• Eliminates need for dual supplies
• Output voltage compatible with TTL, DTL, ECL, MOS and
CMOS logic systems
• Low input offset current and offset voltage:
- +5 nA, +3 mV
DESCRIPTION:
Maxwell Technologies 139 consisting of four independent pre-
cision voltage comparators, features a greater than 100 krad
(Si) total dose tolerance, depending upon space mission.
Using Maxwell Technologies radiation- hardened Rad-Pak®
packaging technology, the 139 has an offset voltage specifica-
tion as low as 2 mV max for all four comparators. The 139
was also designed specifically to operate from a single power
supply over a wide range of voltages. Operation from split
power supplies is possible and the low power supply current
drain is independent of the magnitude of the power supply
voltage. These comparators also have a unique characteristic
in that the input common-mode voltage range includes
ground, even though operated from a single power supply
voltage.
Maxwell Technologies' patented RAD-PAK packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, RAD-PAK provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
Logic Diagram