BRO375 - Skyworks Solutions, Inc.

Applications
• General purpose,
switching
Features
• Low capacitance
• Low resistance
• Fast switching
• Low distortion
attenuation
• ADS models available
Silicon PIN Diode Chips
Skyworks broad product portfolio includes PIN diodes as packaged and bondable silicon
chips, in addition to beam-lead, and plastic surface mount packaged devices for switch
and attenuator applications.
Skyworks series of silicon PIN diode chips offer excellent performance in chip-andwire hybrid circuit switches and attenuators. These devices are available in a wide variety
of I layer thicknesses, capacitances and resistances which make them suitable for such
diverse applications as very fast switches and low distortion attenuators.
Applications
PIN diodes are three layer diodes, comprised of a heavily doped anode (the “P” layer) and
a heavily doped cathode (the “N” layer) separated by a virtually undoped intrinsic layer
(the “I” layer). Under forward bias, charge carriers from the P and the N layers are forced
into the I layer, which reduces its RF impedance. When a reverse bias voltage is applied
across the PIN diodes, all free charge carriers are removed from the I layer, thereby causing
its RF impedance to increase. This variable RF impedance versus DC or low frequency bias
signal allows the diode to be used in RF switching circuits, in which the PIN diode is either
heavily forward-biased or reverse biased, or in RF attenuation circuits, in which case the
PIN diode is utilized as a continuously-variable RF resistance by controlling the magnitude
of the DC bias current through the diode.
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Electrical Specifications at 25 °C
Part
Number
Capacitance
VR = 50 V,
1 MHz
(pF) Max.
Capacitance
VR = 0 V,
1 MHz
(pF) Typ.
RS
I = 10 mA,
500 MHz
(Ω) Max.
TL
I = 10 mA
(ns) Typ.
Voltage
Rating(1) (V)
I Region
Thickness
(µm) Nom.
Thermal
Resistance
(°C/W) Max.
Contact
Diameter
(Mils) Nom.
Outline
Drawing
Switching Applications
APD0505-000
0.05
0.1
2
20
50
5
100
1.5
150-806
APD0510-000
0.1
0.2
1.5
40
50
5
80
2.5
150-801
APD0520-000
0.2
0.25
1
50
50
5
80
3.5
150-801
APD0805-000
0.05
0.1
2
100
100
8
80
2
150-801
APD0810-000
0.1
0.15
1.5
160
100
8
60
3
150-801
APD1510-000
0.1
0.2
2
300
200
15
60
3
150-813
APD1520-000
0.2
0.25
1.2
900
200
15
30
4
150-802
0.2
0.35
4
700
100
50
80
7.5
149-815
Attenuator Applications
APD2220-000
1. Reverse current is specified at 10 µA maximum at the voltage rating. This voltage should not be exceeded.
Switching
The circuit below shows a pair of PIN diodes used to
form a single pole, double throw switch. In this switch, a
positive control current typically of the order of 10 mA is
applied to one of the bias inputs to place that side of the
switch into its low insertion loss state, while a negative
bias voltage is applied to the other bias input, forcing
the diode on that side of the switch into its maximum RF
impedance state to produce high isolation on that side of
the switch.
Many other switching circuit variations exist. Please
refer to “Design with PIN Diodes,” available at www.
skyworksinc.com for more information.
Bias
Output
C2
C3
Input 1
Input 2
C1
D1
D2
C4
C2, C3 — Chip MIS capacitor
C1, C4 — Chip or beam-lead MIS capacitor
D1, D2 DSG9500 beam-lead PIN diode
Typical SPDT Switch
Attenuation
RF Input
A resistive attenuator can be built utilizing one or more
PIN diodes. In this type of circuit, the RF resistance of the
PIN diode is adjusted to a desired value by varying the
magnitude of the DC bias current applied to the diode.
This resistance produces attenuation.
The diagrams below show an attenuator that utilizes
three PIN diodes. Many other PIN diode attenuator circuit
configurations are possible. Please refer to “Design with
PIN Diodes,” available at www.skyworksinc.com for more
information.
Bias
R3
R2
R1
RF
Input
RF Output
D3 (RS3)
D1 (RS1)
RF
Output
D2 (RS2)
Outline Drawings
149-815
150 Series
Schematic
Anode
Metallized
Gold Dot
0.010 (0.251 mm) Min.
0.014 (0.356 mm) Max. Sq.
Anode
Top Contact, Gold
0.002 (0.050 mm)
Dia. Min.
0.014 ± 0.001
(0.325 ± 0.025 mm)
150-801:
0.002 (0.051 mm) Min.
150-806:
0.0011 (0.028 mm) Min.
0.014 ± 0.001
(0.325 ± 0.025 mm)
0.004 (0.010 mm)
0.006 (0.015 mm) Nom.
0.004 (0.127 mm) Min.
0.006 (0.152 mm) Max.
Silicon
Cathode Metallized Back
Contact: Gold
Metallized Back
Contact, Gold
-219
Schematic
0.075 (1.91 mm)
0.065 (1.65 mm)
Sq.
-203
Schematic
N-Type
0.045 (1.14 mm)
0.030 (0.76 mm)
0.050 (1.27 mm)
0.040 (1.02 mm)
0.020 (0.51 mm) Typ.
0.010 (0.24 mm)
Ref.
0.055 (1.40 mm)
0.051 (1.30 mm)
Dia.
0.048 ± 0.005
0.012 (0.30 mm)
Typ.
247-001
0.033 (0.84 mm)
Min.
-240
404-801
Schematic
1
2
-210
-011 (240)
50°
45°
0.175 (4.44 mm)
0.125 (3.18 mm)
2 Plcs.
Schematic
0.064 (1.63 mm)
0.060 (1.52 mm)
2 PLCS
0.098 (2.49 mm)
0.092 (2.34 mm)
Cover Dia.
0.025 (0.63 mm)
Max.
Colored Dot
Denotes Cathode
0.104 (2.64 mm)
0.092 (2.34 mm)
Sq.
0.005 (1.27 mm)
0.003 (0.76 mm)
0.124 (3.15 mm)
0.119 (3.02 mm) Dia.
0.022 (0.56 mm)
0.018 (0.46 mm)
2 Plcs.
0.042 (1.06 mm)
0.028 (0.71 mm)
325-011
0.225 (5.72 mm)
0.205 (5.20 mm)
0.083 (2.20 mm)
0.077 (1.95 mm)
0.097 (2.46 mm)
0.83 (2.11 mm)
0.064 (1.63 mm)
0.060 (1.52 mm)
023-000
Application Notes
For additional information, please refer to the following Application Notes.
Design With PIN Diodes
Diode Chips, Beam-Lead Diodes, Capacitors: Bonding Methods and Packaging
PIN Diode Basics
Green Initiative™
Through our Green Initiative,™ we are committed to manufacturing products that comply with global
government directives and industry requirements.
Skyworks is continuously innovating RF, analog and mixed-signal ICs. For the latest product introductions and
information about Skyworks, visit our Web site at www.skyworksinc.com
For additional information on our broad overall product portfolio, please contact your local sales office or email us at
[email protected]
Skyworks Solutions, Inc.
20 Sylvan Road, Woburn, MA 01801
USA: (781) 376-3000 • Asia: 886 2 2735 0399 x 990
Europe: 33 (0)1 41443660 • Fax: (781) 376-3100
Email: [email protected] • www.skyworksinc.com
BRO375-09A
Printed on Recycled Paper.