DISCRETE CERAMICS
DATA SHEET
ATV321 series
Surface-mount ceramic
50
Ω,
1 to 20 dB attenuators
www.phycomp-components.com
Preliminary specification
2001 Jul 25 Rev.0
Phycomp
Preliminary specification
Surface-mount ceramic
50
Ω,
1 to 20 dB attenuators
FEATURES
•
Reduced system size
•
Low assembly cost
•
Higher component and system reliability
•
Series includes twelve preset attenuation values.
APPLICATIONS
•
Cellular phones
•
Pagers
•
Palmtop computers
•
PDAs.
DESCRIPTION
The attenuators are constructed on a high grade ceramic
body (aluminium oxide). The internal circuit is applied to
the top surface of the substrate, and its design determines
the required attenuation value. The attenuation layer is
covered with a protective coating and a rectangular marker
indicates input pin 1 as shown in the connection diagram
of Fig.1.
QUICK REFERENCE DATA
VALUE
DESCRIPTION
ATV321
Attenuation range
Attenuation tolerance
1 to 5 dB
6 to 10 dB
15 dB
20 dB
1 dB to 20 dB
:
±0.3
dB (optional
:
±0.5
dB (optional
:
±1.0
dB (optional
:
±2.0
dB (optional
50
Ω
typ.
1 to 10 dB
: DC to 2.5 GHz
15 and 20 dB : DC to 2.0 GHz
1.3 max.
50 V (DC or RMS)
40 mW
55/125/56
IEC 60 115-8
±0.2
dB)
±0.3
dB)
±0.5
dB)
±1.0
dB)
input
signal
1
3
ATV321 series
Finally, the four external end terminations are added. To
guarantee optimum solderability the outer layer of the
terminations consists of a lead-tin alloy.
attenuated
output signal
2
4
HBK077
The rectangular marker designates input pin 1.
Fig.1 Connection diagram.
Characteristic impedance
Frequency range
VSWR
Maximum permissible voltage
Power rating
Climatic category (IEC 60068)
Basic specification
2001 Jul 25 Rev.0
2
www.phycomp-components.com
Phycomp
Preliminary specification
Surface-mount ceramic
50
Ω,
1 to 20 dB attenuators
FUNCTIONAL DESCRIPTION
Product characterization
Standard attenuation values include
1 dB to 5 dB with a tolerance of
±0.3
dB (optional
±0.2
dB), 6 dB to
10 dB with a tolerance of
±0.5
db
(optional
±0.3
dB), 15 dB with a
tolerance of
±1.0
dB (optional
±0.5
dB), and 20 dB with a tolerance
of
±2.0
dB (optional
±1.0
dB).
Limiting values
50
ATV321 series
D
ERATING
The power that the attenuator can dissipate depends on the operating ambient
temperature; see Fig.2.
handbook, halfpage
P
max
(%Prated )
MLB206
100
TYPE
ATV321
LIMITING
VOLTAGE
(V)
50
LIMITING
POWER
(W)
0.040
0
55
0
50
70
100 125
o
Tamb ( C)
Fig.2
Maximum dissipation (P
max
) in percentage of rated power as
a function of the operating ambient temperature (T
amb
).
2001 Jul 25 Rev.0
3
www.phycomp-components.com
Phycomp
Preliminary specification
Surface-mount ceramic
50
Ω,
1 to 20 dB attenuators
MECHANICAL DATA
Mass per 100 units
TYPE
ATV321
Marking
The ATV321 is marked with a
rectangle that indicates input pin 1
(see Fig.3).
P
ACKAGE MARKING
The packing is marked and includes
attenuation value, tolerance,
catalogue number, quantity,
production period, batch number and
source code.
A
D
W
ATV321 series
Outlines
MASS
(g)
0.116
L
P
B
T
HBK076
For dimensions see Table 1.
Fig.3 Outline drawing.
Table 1
Physical dimensions; see Fig.3
ATV321
SYMBOL
VALUE
L
W
T
A
B
P
D
1.00
1.00
0.35
0.33
0.15
0.65
0.25
TOL.
±0.10
±0.10
±0.05
±0.10
±0.10
±0.10
±0.10
mm
mm
mm
mm
mm
mm
mm
UNIT
2001 Jul 25 Rev.0
4
www.phycomp-components.com
Phycomp
Preliminary specification
Surface-mount ceramic
50
Ω,
1 to 20 dB attenuators
ORDERING INFORMATION
Table 2
Ordering code indicating attenuator type
ATV321 series
ORDERING CODE 2350 ... .....
TYPE
ATTENUATION
VALUE
1 dB to 20 dB
TOL.
(%)
see Table 3
PAPER TAPE ON REEL
5000 units
ARV321
703 10...
PAPER TAPE ON REEL
10000 units
703 11...
Ordering code (12NC)
•
The attenuators have a 12-digit ordering code starting with 2350
•
The subsequent five digits indicate the attenuator type and packing; see Table 2
•
The remaining three digits indicate the attenuation value and tolerance; see Table 3
– The first 2 digits indicate the attenuation value
– The last digit indicates the attenuation tolerance.
Table 3
Attenuation value, tolerance and ordering code (12NC)
STANDARD
TOLERANCE
(dB)
±0.3
±0.3
±0.3
±0.3
±0.3
±0.5
±0.5
±0.5
±0.5
±0.5
±1.0
±2.0
12NC
2350 703 10012
2350 703 10022
2350 703 10032
2350 703 10042
2350 703 10052
2350 703 10063
2350 703 10073
2350 703 10083
2350 703 10093
2350 703 10103
2350 703 10154
2350 703 10205
OPTIONAL
TOLERANCE
(dB)
±0.2
±0.2
±0.2
±0.2
±0.2
±0.3
±0.3
±0.3
±0.3
±0.3
±0.5
±1.0
12NC
2350 703 10011
2350 703 10021
2350 703 10031
2350 703 10041
2350 703 10051
2350 703 10062
2350 703 10072
2350 703 10082
2350 703 10092
2350 703 10102
2350 703 10153
2350 703 10204
ATTENUATION
VALUE
(dB)
1
2
3
4
5
6
7
8
9
10
15
20
O
RDERING EXAMPLE
The ordering code of an ATV321 with 2 ±0.3 dB attenuation, supplied on paper tape of 5000 units per reel is:
2350 703 10022; the ordering code of the same attenuator supplied on paper tape of 10000 units per reel is:
2350 703 11022.
2001 Jul 25 Rev.0
5
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