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SMP1307-027 View Datasheet(PDF) - Alpha Industries

Part Name
Description
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SMP1307-027 Datasheet PDF : 4 Pages
1 2 3 4
Very Low Distortion Attenuator Plastic Packaged PIN Diodes
SMP1307 Series
SMP1307-027 4 Diode PI Attenuator
The SMP1307-027 employs 4 PIN diode junctions in a
5-lead SOT package. It is configured for ease of
insertion in the PI attenuator circuit commonly used for
broadband TV distribution systems, covering a frequency
range from 5 MHz to beyond 1 GHz.
A broadband attenuator was designed using the
SMP1307-027 showing good performance to 2 GHz. The
attenuator was evaluated with a 50 source and load
impedance. The following figure shows the circuit
diagram and measured performance.
32 1
4
5
C1
10,000 pF
R2
1k
D1
D3
VTUNE
C6 020 V
10,000 pF
C5
10,000 pF
RF
Input
R1 D2
1k
C2
10,000 pF
R3
1k
R5
560
D4
R6
560
R4
1k
C4
10,000 pF
C3
10,000 pF
VREF
5V
RF
Output
D1–D4 SMP1307-027
A 4 diode PI attenuator utilizing individual SMP1307-011 PIN diodes is described in the A Wideband General Purpose PIN Diode AttenuatorApplication Note.
0
VCTL = 20 V
-10
VCTL = 15 V
VCTL = 10 V
-20
VCTL = 5 V
-30
VCTL = 0 V
-40
-50
0
0.5
1.0
1.5
2.0
Frequency (GHz)
SMP1307-027 Attenuation vs. Frequency
Alpha Industries, Inc. [781] 935-5150 Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
3
Specifications subject to change without notice. 1/01A
 

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