Memory

All data sheets are subject to change without notice

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Quad Comparators,

139

Low Offset Voltage

12.13.01 Rev1

1000522

EATURES

· 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

· 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

ESCRIPTION

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 R

-P

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, R

-P

provides greater than 100

krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.

Logic Diagram

Memory

All data sheets are subject to change without notice

Quad Comparators, Low Offset Voltage

139

12.13.01 Rev1

1000522

ABLE

1. P

INOUT

ESCRIPTION

YMBOL

ESCRIPTION

2, 1, 14, 13

OUTPUT1 - 4

Output Signal

4, 6, 8, 10

INPUT1- 4

Negative Input Signal

5, 7, 9, 11

INPUT+ 4

Positive Input Signal

V+

Positive Voltage

GND

Ground

ABLE

2. 139 A

BSOLUTE

AXIMUM

ATINGS

ARAMETER

YMBOL

NIT

Supply Voltage (V+ - V-)

V+ - V-

36 V

or ±18 V

Differential Input Voltage

1. Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the com-

mon-mode range, the comparator will provide a proper output state. The low output voltage state must not be less than -0.3
V

(or 0.3 V

below the magnitude of the negative power supply, if used) (at 25°C).

Input Voltage

-0.3

+36

Open Short-Circuit to Ground

2. Short Circuits from the output to V+ can cause excessive heating and eventual destruction. When considering short circuits to

ground, the maximum output current is ~20mA independent of the magnitude of V+.

Continuous

Input Current (V

< -0.3V

)

Power Dissipation

Storage Temperature Range

-65

150

Operating Temperature Range

-55

125

ESD Tolerance

3. 1.5 k

in series with 100 pF.

600

ABLE

3. D

ELTA

IMITS

ARAMETER

ARIATION

±10% of specified value in Table 5

ABLE

4. 139 R

ECOMMENDED

PERATING

ONDITIONS

ARAMETER

YMBOL

NIT

Supply Voltage

V+ - V-

36 V

or ±18 V

Memory

All data sheets are subject to change without notice

Quad Comparators, Low Offset Voltage

139

12.13.01 Rev1

1000522

ABLE

5. 139 E

LECTRICAL

HARACTERISTICS

(V+ = 5V, T

= -55

125°C,

UNLESS

OTHERWISE

SPECIFIED

)

ARAMETER

YMBO

EST

ONDITIONS

NIT

Input Offset Voltage

1. At output switch point, V

=1.4V, RS=0

with V+ from 5V

to 30 V

; and over the full input common-mode range (0V

V+-1.5V

+25°C

-55 to 125°C

Input Bias Current

(+) or I

(-) with Output in Linear

Range,

, V

= 0V

2. The direction of the input current is out of the IC due to the PNP input stage. This current essentially constant, independent of

the state of the output so no loading change exists on the reference or input lines.

+25°C

100

-55 to 125°C

300

Input Offset Current

(+) - I

(-), V

= 0V

+25°C

-55 to 125°C

100

Input Common Mode
Voltage Range

V+ = 30 V

3. The input common-mode voltage or either input voltage signal should not be allowed to go negative by more than 0.3V. The

upper end of the common-mode voltage range is V+-1.5V at 25°C, but either or both inputs can go to +30V without damage,
independent of the magnitude of V+.

+25°C

V+ -1.5

-55 to 125°C

V+ -2.0

Supply Current

on all comparators, V+ = 30V +25°C

0.8

2.0

-55 to 125°C

3.0

Voltage Gain

> 15k

, V+=15V

;

= 1V

to 11 V

( To support large V

swing)

+25°C

200

V/mV

Large Signal Response
Time

= TTL Logic Swing,

REF

= 1.4V, V

= 5

= 5.1k

+25°C

300

Response Time

Rtil

= 5

, R

= 5.1k

4. The response time specified is for a 100mV input step with 5 mV overdrive. For larger overdrive signals 300 ns can be

obtained.

+25°C

1.3

µs

Output Sink Current

SINK

(-) = 1V

, V

(+) = 0,

< 1.5V

+25°C

6.0

Saturation Voltage

SAT

(-) > 1V, V

(+) = 0,

SINK

< 4 mA

+25°C

250

400

-55 to 125°C

700

Output Leakage Current

CEX

(+) = 1V

, V

(-) = 0,

= 5V

(-) = 0

+25°C

0.1

-55 to 125°C

1.0

µA

Differential Input Voltage

diff

Keep all V

IN's

> 0 V

(or V- if used)

5. Positive excursions of input voltage may exceed the power level as long as the other voltage remains within the common

mode range, the comparator will provide a proper output state. The low input voltage state must not be less than -0.3 V

(or

0.3V

below the magnitude of the negative power supply, if used) (at 25°C).

-55 to 125°C

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