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
L = Lead/Tab (Gold Plated BeCu)
W = Wrap around ground only
F = Wrap around all terminals (flip-chip)
T = Tinned terminals (any terminal type)
G = Gold plated terminals
SERIES PCA, PCAA
ATTENUATORS, CHIP
Low Power – DC-18 GHz
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.
GENERAL SPECIFICATIONS
Impedance 50 Ohms
Operating Temperature –55°C to +150°C
Attenuation Stability 0.0001 dB/dB/°C
EXAMPLE:
EXAMPLES:
PCA
or
PCAA (x)
Option(s)
L
W
F
Basic
Series
PCAW-T3
PCAAF-G3
(x)
Option(s)
T
G
dB
Value
AVERAGE POWER DERATING CURVE
25
100
75
50
25
0
85 150 °C
POWER DERATING
% OF RATED POWER
Attenuation Attenuation Accuracy (dB) Note 2 VSWR (Typical) Note 2
Increments DC - 4 GHz 4 - 8 GHz 8 - 12.4 GHz 12.4 - 18 GHz DC - 4 GHz 4 - 8 GHz 8 - 12.4 GHz 12.4 - 18 GHz
(dB) PCA, PCAA PCA, PCAA PCA, PCAA PCAA PCA, PCAA PCA, PCAA PCA, PCAA PCAA
Note 1 Series Series Series Series Only Series Series Series Series Only
1 - 3 ±0.5 ±0.5 ±0.5 ±0.5 1.25 1.35 1.50 1.50
4 - 6 ±0.5 ±0.5 ±0.5 ±0.75 1.25 1.35 1.50 1.50
7 - 10 ±0.5 ±0.5 ±0.75 ±1.0 1.25 1.35 1.50 1.50
11 - 15 ±0.75 +0.5 +0.5 — 1.25 1.35 1.50 —
-3.0 -4.0
16 - 20 ±1.0 +0.5 — — 1.25 1.35 — —
-4.0
PERFORMANCE SPECIFICATIONS
REV 3/05
KEY: Inches [Millimeters] .XX ±.03 .XXX ±.010 [.X ±0.8 .XX ±0.25]
SERIES PCA, PCAA
ATTENUATORS, CHIP
Low Power – DC-18 GHz
KDI-RESISTOR PRODUCTS
60 South Jefferson Road, Whippany, NJ 07981
Tel: 973-887-8100 •Fax: 973-884-0445
www.aeroflex-kdi.com •sales@aeroflex-kdi.com
KEY: Inches [Millimeters] .XX ±.03 .XXX ±.010 [.X ±0.8 .XX ±0.25]
PHYSICAL DIMENSIONS
PCA
PCAA
PCAAL (LEAD/COVER)
PCAL (LEAD/COVER)
PCAW
(WRAP AROUND GROUND TERMINAL ONLY)
PCAF (WRAP AROUND ALL TERMINALS)
PCAAF (WRAP AROUND ALL TERMINALS)
PCAAW
(WRAP AROUND GROUND TERMINAL ONLY)
.025[0.64]
MIN
.060[1.52]
TYP.
.015[0.38] MIN
.150
[3.8]
.010
[0.25]
GROUND
.125
[3.18]
.150
[3.8]
.125
[3.18]
.250[6.4]
MIN
.060±.003
[1.52±0.08]
TYP.
.003±.001
[0.08±0.03]
.040[1.02]
MAX
.060[1.52]
TYP.
.015[0.38]
MIN
.150
[3.8]
.125
[3.18]
.010
[0.25]
.025[0.64]
MIN
.125
[3.18]
.025 MIN
[0.64]
.060[1.52]
TYP.
.015[0.38]
MIN
.150
[3.8]
.010
[0.25]
WRAP AROUND GROUND
WRAP AROUND GROUND
MAXIMUM
FREQUENCY
4 GHz
MAXIMUM
FREQUENCY
8 GHz
.025[0.64]
TYP.
.015[0.38] MIN
.075
[1.9]
.010
[0.25]
GROUND
.060
[1.52]
.020[0.5] TYP..020[0.5] TYP.
.025[0.64]
TYP.
.015[0.38] MIN
.075
[1.9]
.010
[0.25]
WRAP AROUND GROUND
.060
[1.52]
.020[0.5] TYP.
.025[0.64]
TYP.
.015[0.38] MIN
.075
[1.9]
.010
[0.25]
WRAP AROUND GROUND
.060
[1.52]
.075
[1.9]
.060
[1.52]
.250[6.4]
MIN
.020±.003
[0.5±0.08]
TYP.
.003±.001
[0.08±0.03]
.040[1.02]
MAX
