Designed for aerospace and high reliability space applications
Packaging – Hermetic ceramic SOIC
- 16-pin, .411"L x .293"W x .105"Ht
- Weight - 0.8 grams max
Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G.
> 1 Mrad(Si); Dose rate = 50 - 300 rads(Si)/s
> 100 MeV-cm
2
/mg
> 10
14
neutrons/cm
2
GENERAL DESCRIPTION
Aeroflex’s RHD5912 is a radiation hardened, single supply, quad comparator with open drain outputs in a
16-pin SOIC package. The RHD5912 design uses specific circuit topology and layout methods to mitigate
total ionizing dose effects and single event latchup. These characteristics make the RHD5912 especially
suited for the harsh environment encountered in Deep Space missions. It is guaranteed operational from
-55°C to +125°C. Available screened in accordance with MIL-PRF-38534 Class K, the RHD5912 is ideal
for demanding military and space applications.
The RHD5912 quad comparator is intended for operation with dynamic signals on either or both inputs.
Comparison is ’continuous’, that is, the circuit functions as high gain open loop amplifiers with a digital
output. For slow input signals with small input differences the comparators can be expected to respond to
small noise signals at the inputs. Although there is internal hysteresis, feedback hysteresis is the
responsibility of the user to avoid ’chattering’ on system noise.
The comparator will accept signals anywhere in the included power supply range. The circuit delay is
specified for a half-volt single ended or differential input step of either polarity ending in an input polarity
reversal of 10mV. See Switching Diagrams.
CMOS device drive has a negative temperature coefficient and the devices are therefore inherently tolerant
to momentary shorts, although on chip thermal shutdown is not provided. All inputs and outputs are diode
protected
The devices will not latch with SEU events above 100 Mev-cm
2
/mg. Total dose degradation is minimal to
above 1 Mrad(Si). Displacement damage environments to neutron fluence equivalents in the mid 10
14
neutrons per cm
2
range are readily tolerated. There is no sensitivity to low-dose rate (ELDRS) effects. SEU
effects are application dependent.
SCD5912 Rev C
ORGANIZATION AND APPLICATION
OUT_B
OUT_A
VCC
-IN_A
+IN_A
-IN_B
+IN_B
EN_AB
1
2
3
4
5
6
7
8
16
15
14
OUT_C
OUT_D
GND
+IN_D
-IN_D
+IN_C
-IN_C
EN_CD
5912
13
12
11
10
9
16-Pin SOIC
BLOCK DIAGRAM
Notes:
1. Package and Lid are electrically isolated from signal pads.
2. It is recommended that the Lid be grounded to prevent any ESD or static buildup.
3. EN_AB enables Comparators A & B. EN_CD enables Comparators C & D.
PACKAGE PIN-OUT
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Signal Name
OUT_B
OUT_A
VCC
-IN_A
+IN_A
-IN_B
+IN_B
EN_AB
EN_CD
-IN_C
+IN_C
-IN_D
+IN_D
GND
OUT_D
OUT_C
Definition
Output of Comparator B.
Output of Comparator A.
DC Supply Voltage.
Inverting input of Comparator A.
Non-Inverting input of Comparator A.
Inverting input of Comparator B.
Non-Inverting input of Comparator B.
A Logic Low will disable Comparator A & B
so that the outputs are high impedance.
A Logic Low will disable Comparator C & D
so that the outputs are high impedance.
Inverting input of Comparator C.
Non-Inverting input of Comparator C.
Inverting input of Comparator D.
Non-Inverting input of Comparator D.
DC Supply Return.
Output of Comparator D.
Output of Comparator C.
PIN-OUT DESCRIPTION
SCD5912 Rev C 12/24/13
2
Aeroflex Plainview
ABSOLUTE MAXIMUM RATINGS
Parameter
Case Operating Temperature Range
Storage Temperature Range
Junction Temperature
Supply Voltage (+V
CC
)
Input Voltage
Lead Temperature (soldering, 10 seconds)
Thermal Resistance, Junction-to-Case
JC
ESD Rating (MIL-STD-883, Method 3015, Class 2)
Power @ 25°C
Range
-55 to +125
-65 to +150
+150
+6.0
V
CC
+0.4
GND -0.4
300
7
2,000 - 3,999
250
Units
°C
°C
°C
V
V
V
°C
°C/W
V
mW
NOTICE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress rating only;
functional operation beyond the "Operation Conditions" is not recommended and extended exposure beyond the "Operation Conditions" may affect
device reliability.
RECOMMENDED OPERATING CONDITIONS
Symbol
+V
CC
V
CM
Power Supply Voltage
Input Common Mode Range
Parameter
Typical
3.3 to 5.0
(V
CC
- 1.5) to GND
Units
V
V
ELECTRICAL PERFORMANCE CHARACTERISTICS
(T
C
= -55°C
TO
+125°C, +V
CC
= +5.0V -- U
NLESS OTHERWISE SPECIFIED
)
Parameter
Quiescent Supply Current 1/
Symbol
I
CCQ
V
OS
I
OS
I
B
CMRR
PSRR
V
OL
I
OUT
= 5mA
I
OUT
= 10mA
I
OUT
= 20mA
Gain 1/
Output Leakage Current 1/, 3/
Short Circuit Output Current
2/
A
I
LKOUT
I
O
(
SINK
)
V
HI
V
LO
I
EN
High (Enabled)
Low (Disabled)
T
C
= +25°C, +125°C
V
OUT
= V
CC
, T
C
= +25°C, +125°C
-35
3.5
1.5
10
5
100
-60
T
C
= +25°C, +125°C
T
C
= +25°C, +125°C
E
N
= 1, N
O
L
OAD
E
N
= 0 2/
-20
-10
-10
50
70
0.25
0.44
1.00
Conditions
Min
Max
3
300
20
10
10
Units
mA
nA
mV
nA
nA
dB
dB
V
V
V
V/mV
nA
mA
V
V
nA
Input Offset Voltage 1/
Input Offset Current 1/, 3/
Input Bias Current 1/, 3/
Common Mode Rejection Ratio 1/
Power Supply Rejection Ratio 1/
Output Voltage Low 1/
Input Voltage - Enable (EN_AB,
EN_CD)
Input Current - Enable
(EN_AB, EN_CD) 3/
Notes:
1/ Specification derated to reflect Total Dose exposure to 1 Mrad(Si) @ 25°C.
2/ Not tested. Shall be guaranteed by design, characterization or correlation to other test parameters.
3/ Subgroup 3 for these parameters is guaranteed, but not production tested.
SCD5912 Rev C 12/24/13
3
Aeroflex Plainview
(T
C
= -55°C
TO
+125°C, +V
CC
= +5.0V -- U
NLESS OTHERWISE SPECIFIED
)
Parameter
Output Delay (Switching)
Output Delay (Enabled)
Output Delay (Disabled)
SWITCHING CHARACTERISTICS
Conditions
1/
Symbol
T
OUT
t
ON
EN
t
OFF
EN
Min
Max
300
500
100
Units
ns
ns
ns
Note:
1/ The circuit delay is specified for a half-volt single ended or differential input step, of either polarity, ending in an input polarity reversal of 10mV.
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