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
GENERAL SPECIFICATIONS
Impedance
Operating Temperature –55°C to +150°C
Attenuation Stability 0.0001 dB/dB/°C
50 Ohms
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.
AVERAGE POWER DERATING CURVE
Options
L = Lead/Tab (Gold Plated BeCu)
POWER DERATING
W = Wrap around ground only
100
75
50
F = Wrap around all terminals (flip-chip)
T = Tinned terminals (any terminal type)
G = Gold plated terminals
25
0
EXAMPLE:
PCA
or
25
85
150 °C
(x)
(x)
PCAA
Basic Option(s)
Option(s)
dB
Value
NOTES
Series
L
W
F
T
G
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.
EXAMPLES: PCAW-T3
PCAAF-G3
PERFORMANCE SPECIFICATIONS
Attenuation
Increments
(dB)
Attenuation Accuracy (dB) Note 2
VSWR (Typical) Note 2
DC - 4 GHz
PCA, PCAA
Series
4 - 8 GHz
PCA, PCAA
Series
8 - 12.4 GHz
PCA, PCAA
Series
12.4 - 18 GHz
PCAA
Series Only
DC - 4 GHz
PCA, PCAA
Series
4 - 8 GHz
PCA, PCAA
Series
8 - 12.4 GHz
PCA, PCAA
Series
12.4 - 18 GHz
PCAA
Series Only
Note 1
1 - 3
4 - 6
±0.5
±0.5
±0.5
±0.5
±0.5
±0.5
±0.5
±0.5
±0.75
±1.0
—
1.25
1.25
1.25
1.25
1.35
1.35
1.35
1.35
1.50
1.50
1.50
1.50
1.50
1.50
1.50
—
7 - 10
11 - 15
±0.5
±0.75
±0.75
+0.5
-3.0
+0.5
-4.0
16 - 20
±1.0
+0.5
-4.0
—
—
1.25
1.35
—
—
KEY: Inches [Millimeters] .XX .03 .XXX .010 [.X 0.8 .XX 0.25]
REV 3/05