PRELIMINARY
AMH461
Hybrid - High Reliability
EMI Filter
DESCRIPTION
The AMH Series EMI filter has been designed to provide
full compliance with the input line reflected ripple
current requirement specified by CE03 of MIL-STD-
461C over the extended military temperature range
while operating in conjunction with the corresponding
AHF series of DC/DC converters. These filters are
offered as part of a family of high reliability conversion
products providing single, dual and triple output voltages
while operating from nominal +28 volt input line. Other
converters operating with a similar switching frequency
will also benefit from use of this device.
These EMI filters are hermetically packaged in a seam
welded enclosure utilizing axially oriented copper-core
pins which minimize resistive DC losses. This package
has been configured to complement the AHF package
as a convenience in system installation and is
fabricated with Advanced Analog / M-3's rugged
ceramic lead-to-package seal assuring long term
hermetic seal integrity in harsh environments.
Designed to meet the the stringent requirements of
military and aerospace use, these devices are
manufactured in a facility fully qualified to MIL-PRF-
38534, and are available in two screening grades. The
CH grade intended for flight use is fully compliant to the
requirements of MIL-PRF-38534 for class H. The HB
grade is processed and screened to the class H
requirement, but does not include element evaluation.
The ES grade is processed and screened to a lower
level requirement. Class CH grade and class HB grade
are tested to meet the complete group "A" test
specification over the full military temperature range
with no derating. Variations in electrical, mechanical
and screen requirements can be accommodated.
Contact Advanced Analog / M-3 for special
requirements.
+Vin
FEATURES
n
n
n
n
n
n
Up to 2.0 Ampere Output Current
Attenuation > 60dB at 500KHz
Low Profile Seam Welded Package
Ceramic Insulated Copper Core Pins
Operation Over Full Military Temp Range
No Derating for –55ºC to +125º C
Typical Connection Diagram
+Vout
+Vin
System
Bus
AMH461/CH
EMI Filter
Input Return
Output Return
AHF28xx/CH
(or Other)
DC/DC Converter
+Vout
R
L
Input Return
Output Return
+Vin
AHF28xx/CH
(or Other)
DC/DC Converter
+Vout
R
L
Input Return
Output Return
1
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Note 1
Input Voltage
Input Current
Lead Soldering Temperature
Case Temperature
-80V to +80V
Note 2
3.0 A
300°C for 10 seconds
Operating
Storage
-55°C to +125°C
-65°C to +135°C
AMH461
Electrical Characteristics
Parameter
INPUT VOLTAGE
-55°C
≤
T
CASE
≤
+125°C, -50
≤
V
IN
≤
+50 unless otherwise specified.
Group A
Subgroups
Test Conditions
Steady State
Transient
Note 2
Min
-40
-50
Nom
—
Max
+40
+50
V
DC
V
DC
2.0
1
T
C
= 25°C
Maximum Current
T
C
= 25°C
T
C
= 25°C
1KHz
200 KHz - 500 KHz
500 KHz – 10 MHz
10 MHz – 50 MHz
1
Any Pin to Case
Tested @ 500VDC
Measured Between Any Pin and Case
Slight Variations with Case Style
150
250
A
DC
mΩ
Unit
OUTPUT VOLTAGE
OUTPUT CURRENT
Note 3
DC RESISTANCE
Note 4
POWER DISSIPATION
1, 2, 3
V
OUT
= V
IN
- I
IN
(R
DC
)
1.0
W
NOISE REDUCTION
-1
40
70
60
100
+1
50
80
70
dB
ISOLATION
MΩ
CAPACITANCE
DEVICE WEIGHT
Notes to Specifications:
1.
2.
3.
4.
44
30
nF
gms
Operation above maximum ratings may cause permanent damage to the device. Operation at maximum ratings may degrade performance and affect
reliability.
Device can tolerate ± 100 Volt transient whose duration is
≤
100 ms when R
S
≥
0.5
Ω.
Derate Output Current linearly from 100% at 125°C to 0 at 135°C.
DC resistance is the total resistance of the device and includes the sum of the
input
to
output
resistance and the
return in
to
return out
resistance
paths.
2
Part Numbering/Ordering Information
AMH 461 F / CH
Model
Applicable
Military Test
Standard
Case Style
F = Flange
Y = Flange w/Side Pins
- = No Flange
Screening
CH, HB, ES
See chart for details
Typical Filter CE03 Performance
AHF2805S CE03 Performance Without AMH461 filter
AHF2805S CE03 Performance With AMH461 filter
©
Advanced Analog / M-3
The information in this data sheet has been carefully checked and is believed to be accurate; however no responsibility is
assumed for possible errors. These specifications are subject to change without notice.
0020
ADVANCED ANALOG / M-3 INC.
λ
MIL-PRF-38534 Qualified
ISO 9001 Registered
2270 Martin Avenue
Santa Clara CA 95050-2781
(408) 988-4930 FAX (408) 988-2702
5
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