Plastic Packaged Fixed Attenuators
SMA1305 Series
Features
s
Extremely Flat Response DC–2.5 GHz
s
Return Loss >16 dB, DC–2.5 GHz
s
0.5 W CW Power Handling
s
Low Cost Industry Standard SOT-143
Package
s
Designed for High Volume Commercial
Applications
s
Available in 1–10, 12, 15, 20, 30
and 40 dB Values
0.020 (0.50 mm) REF.
SOT-143
0.110 (2.80 mm) MIN.
0.120 (3.04 mm) MAX.
0.076 (1.92 mm) REF.
4
0.083 (2.10 mm) MIN.
0.104 (2.64 mm) MAX.
1
0.068 (1.72 mm) REF.
0.028 (0.70 mm) REF.
0.030 (0.76 mm) MIN.
0.035 (0.89 mm) MAX.
0.047 (1.20 mm) MIN.
0.055 (1.40 mm) MAX.
8˚ MAX.
0.003 (0.08 mm) MIN.
0.008 (0.20 mm) MAX.
0.031 (0.80 mm) MIN.
0.047 (1.20 mm) MAX.
0.012 (0.30 mm) MIN.
0.020 (0.50 mm) MAX.
2
3
Description
The SMA1305 series of fixed attenuators are specified from
DC–2.5 GHz in industry standard SOT-143 surface mount
plastic packages. They are constructed using thin film
resistors in a balanced TEE configuration on silicon
substrates, resulting in precise devices with narrow
tolerance, good flatness and low SWR.
0.022 (0.55 mm) REF.
0.0005 (0.01 mm) MIN.
0.004 (0.15 mm) MAX.
Electrical Specifications at 25°C
Part
Number
SMA1305-01
SMA1305-02
SMA1305-03
SMA1305-04
SMA1305-05
SMA1305-06
SMA1305-07
SMA1305-08
SMA1305-09
SMA1305-10
SMA1305-12
SMA1305-15
SMA1305-20
SMA1305-30
SMA1305-40
Nominal
Attenuation
(dB)
1
2
3
4
5
6
7
8
9
10
12
15
20
30
40
Tolerance
@ DC
(dB)
±0.15
±0.15
±0.25
±0.25
±0.25
±0.25
±0.25
±0.35
±0.35
±0.35
±0.50
±0.50
±1.10
±1.60
±1.60
Maximum Flatness
DC–500 MHz
(dB)
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
DC–1000 MHz
(dB)
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
DC–2500 MHz
(dB)
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
Return Loss Min.
DC–2500 MHz
(dB)
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
Package
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 6/99A
1
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