SILICON PIN DIODES
Plastic package Surface Mount attenuating silicon PIN diodes
PLASTIC PACKAGE SURFACE MOUNT ATTENUATING
SILICON PIN DIODES
Description
TEMEX uses its proprietary technology to manufacture its Silicon PIN diodes in plastic package.
This product family is designed for a low cost, medium to high volume market that may be supplied
in tape and reel for automated pick and place assembly on surface mount circuit boards.
The use of this technology eliminates wire bonding on to the chips.
Applications
Typical applications include variable RF attenuators and AGC (Automatic Gain Control) circuits,
from MHz to several GHz.
The attenuating Pin diode uses properties of variation of forward series resistance versus the DC
forward bias current. In order to obtain the best dynamic range, a single diode attenuator may be used
in series or shunt configuration or designed as a multiple diode circuit (T or p circuit), where the device
may be matched through the attenuation range.
Note:
To reduce the distortion, it is necessary to verify and design with the following formula:
Î
HF
πτ
l
I
DC
F << 1
Î
HF
:
RF peak current (A)
Diode minority carrier lifetime (s)
DC bias current (A)
Application frequency (Hz)
τ
l
:
I
DC
:
F
:
Typical performance curve
R
SF
(Ω)
1000
Typical series resistance versus forward current
100
10
DH40144
DH40225
DH40141
1
0.1
12-8
Vol. 1
1
I
F
(mA)
10
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http://www.temex.com
TEMEX [ TEMEX ]
