SERIES PCA, PCAA
ATTENUATORS, CHIP
Low Power – DC-18 GHz
FEATURES
•
Laser Trimmed
•
Temperature Stable
GENERAL INFORMATION
The PCA and PCAA Series consists of a laser trimmed distrib-
uted thin film element on an alumina ceramic substrate with
solderable terminals. Two sizes are available. The PCA size
operates to 12.4 GHz and the PCAA size operates to 18.0 GHz.
Both sizes are available with leads and wrap around conduc-
tors for ease of installation. The PCAF and PCAAF options are
designed for “flip-chip” application in lower frequency circuits.
PCA & PCAA SERIES DATA
•
Substrate: 96% Alumina
•
Solderable Terminals: Electroplated Silver over Nickel
•
Resistive Element: Proprietary Thin Film
•
Wrap around Ground Terminal available, “W” option
•
Wrap around-all terminals—“F” option
•
Standard values 1, 2, 3, 4, 5, 6, 10, 20 dB
•
Non-std. values available as special order
ORDERING INFORMATION
The attenuators listed are available in 1 dB increments from 1
through 20 dB. When ordering, to specify the correct part num-
ber for the desired attenuation value, select any of the series
listed and add the attenuation value desired to the basic series
designation.
Options (Note 4)
L = Lead/Tab (Gold Plated BeCu)
W = Wrap around ground only
F = Wrap around all terminals (flip-chip)
T = Tinned terminals (any terminal type) Sn63
H = Tinned terminals (any terminal type) Sn96
G = Gold plated terminals
EXAMPLE:
PCA
or
PCAA
GENERAL SPECIFICATIONS
Impedance
Operating Temperature
Attenuation Stability
50 Ohms
–55°C to +150°C
0.0001 dB/dB/°C
AVERAGE POWER DERATING CURVE
POWER DERATING
% OF RATED POWER
100
75
50
25
0
25
85
150°C
(x)
(x)
Option(s)
T
H
G
dB
Value
Basic Option(s)
Series
L
W
F
EXAMPLES:
PCAW-T3
PCAAF-G3
NOTES
1. Performance of other dB values vary dependent on attenuation.
Contact factory for specifications for fractional dB values.
2. Performance is based on device mounted in matched 50 Ohm line.
3. Rated power 1.5 Watts input PCA, 100 mw PCAA.
4. Tinning with Sn96 “Lead Free” high temperature solder will maintain RoHS
compliance.
PERFORMANCE SPECIFICATIONS
Increments
(dB)
Note 1
1-3
4-6
7 - 10
11 - 15
16 - 20
DC - 4 GHz
PCA, PCAA
Series
±
0.5
±
0.5
±
0.5
±
0.75
±
1.0
Attenuation Accuracy (dB) Note 2
4 - 8 GHz
8 - 12.4 GHz
12.4 - 18 GHz
PCA, PCAA
PCA, PCAA
PCAA
Series
Series
Series Only
±
0.5
±
0.5
±
0.5
+0.5
-3.0
+0.5
-4.0
±
0.5
±
0.5
±
0.75
+0.5
-4.0
—
±
0.5
±
0.75
±
1.0
—
—
DC - 4 GHz
PCA, PCAA
Series
1.25
1.25
1.25
1.25
1.25
VSWR (Typical) Note 2
4 - 8 GHz
8 - 12.4 GHz 12.4 - 18 GHz
PCA, PCAA
PCA, PCAA
PCAA
Series
Series
Series Only
1.35
1.35
1.35
1.35
1.35
1.50
1.50
1.50
1.50
—
1.50
1.50
1.50
—
—
KEY:
Inches [Millimeters] .XX ±.03 .XXX ±.010 [.X ±0.8 .XX ±0.25]
SERIES PCA, PCAA
ATTENUATORS, CHIP
Low Power – DC-18 GHz
PHYSICAL DIMENSIONS
PCA
.025[0.64]
MIN
.060 [1.52]
TYP.
.125
[3.18]
.010
[0.25]
PCAW
(WRAP AROUND GROUND TERMINAL ONLY)
.025[0.64]
MIN
.060[1.52]
TYP.
.010
[0.25]
.125
[3.18]
.150
[3.8]
GROUND
.015[0.38] MIN
.150
[3.8]
WRAP AROUND GROUND
.015[0.38]
MIN
PCAL (LEAD/COVER)
.150
[3.8]
.250 [6.4]
MIN
.040 [1.02]
MAX
PCAF (WRAP AROUND ALL TERMINALS)
.025 MIN
[0.64]
.060 [1.52]
TYP.
MAXIMUM
FREQUENCY
4 GHz
.010
[0.25]
WRAP
AROUND
TERM TYP
(SIDE WRAP
OPTIONAL)
WRAP AROUND GROUND
(SIDE WRAP OPTIONAL)
.015 [0.38]
MIN
.125
[3.18]
.125
[3.18]
.060±.003
[1.52±0.08]
TYP.
.150
[3.8]
.003±.001
[0.08±0.03]
PCAA
.025 [0.64]
TYP.
.020 [0.5] TYP.
.060
[1.52]
.075
[1.9]
GROUND
.015[0.38] MIN
.010
[0.25]
PCAAW
(WRAP AROUND GROUND TERMINAL ONLY)
.025 [0.64]
TYP.
.020[0.5] TYP.
.060
[1.52]
.075
[1.9]
WRAP AROUND GROUND
.015 [0.38] MIN
.010
[0.25]
PCAAL (LEAD/COVER)
.075 .250 [6.4]
[1.9]
MIN
.060
[1.52]
.040 [1.02]
MAX
PCAAF (WRAP AROUND ALL TERMINALS)
.025 [0.64]
TYP.
.020 [0.5] TYP.
.060
[1.52]
.010
[0.25]
MAXIMUM
FREQUENCY
8 GHz
.020±.003
[0.5±0.08]
TYP.
.003±.001
[0.08±0.03]
WRAP AROUND TERM TYP
(SIDE WRAP OPTIONAL)
.075
[1.9]
WRAP AROUND GROUND
(SIDE WRAP OPTIONAL)
.015 [0.38] MIN
KEY:
Inches [Millimeters] .XX ±.03 .XXX ±.010 [.X ±0.8 .XX ±0.25]
300 Dino Drive, Ann Arbor, MI 48103
Tel: 888-244-6638 or 734-426-5553
•
Fax: 734-426-5557
www.aeroflex.com/inmet
•
inmetsales@aeroflex.com
REV 04/11
ADI Reference Circuit
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