Product Specification
PE4271
Product Description
The PE4271 is a is a high-isolation Switch designed for CATV
applications, covering a broad frequency range from near DC
up to 3000 MHz. This single-supply SPST switch offers a
single-pin CMOS control interface with industry leading CTB
performance. It also provides low insertion loss, high isolation
and extremely low bias requirements while operating on a
single 3-volt supply. In a typical CATV application, the PE4271
provides for a cost effective and manufacturable solution vs.
mechanical relays.
The PE4271 is manufactured on Peregrine’s UltraCMOS™
process, a patented variation of silicon-on-insulator (SOI)
technology on a sapphire substrate, offering the performance
of GaAs with the economy and integration of conventional
CMOS.
Figure 1. Functional Diagram
RF1
ESD
ESD
SPST CATV UltraCMOS™ Switch
DC - 3000 MHz
Features
Integrated 0.25 watt terminations
CTB performance of 90 dBc
High isolation: 85 dB at 5 MHz, 60 dB
at 1000 MHz
Low insertion loss: 0.5 dB at 5 MHz,
0.70 dB at 1000 MHz
High input IP2: >80 dBm
CMOS/TTL single-pin control
Single +3-volt supply operation
Extremely low bias: 8
µA
@ 3 V
Available in a 6-lead DFN package
RF2
CTRL
Table 1. Electrical Specifications @ +25 °C
(Z
S
= Z
L
= 75
Ω
)
Parameter
Condition
Minimum
DC
0.50
0.70
80
58
15
30
85
60
16
33
-90
80
50
15
2
BS
DC – 50 MHz
1000 MHz
DC – 50 MHz
1000 MHz
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Typical
Maximum
3000
0.65
0.85
75Ω
CMOS
Control
Driver
LE
6-lead DFN
TE
Figure 2. Package Type
Units
MHz
dB
dB
dB
dBm
dBc
dBm
dBm
mV
pp
µS
Operating Frequency
1
Insertion Loss
Isolation
O
Return Loss
Input 1 dB Compression
2,4
CTB / CSO
Input IP2
2
Input IP3
2
Video Feedthrough
3
Switching Time
DC - 1000 MHz
V
CTRL
= 3.0V
1000 MHz
77 & 110 channels;
PO = 44 dBmV
1000 MHz
1000 MHz
Notes: 1. Device linearity will begin to degrade below 1 MHz.
2. Measured in a 50
Ω
system.
3. Measured with a 1 ns risetime, 0/3 V pulse and 500 MHz bandwidth.
4. Note Absolute Maximum ratings in Table 3.
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©2005-2009 Peregrine Semiconductor Corp. All rights reserved.
Page 1 of 8
Peregrine products are protected under one or more of the following U.S. Patents: http://patents.psemi.com
PE4271
Product Specification
Figure 3. Pin Configuration
V
DD
GND
RF1
1
2
3
Exposed
Solder Pad
(bottom side)
Table 4. Operating Ranges
Parameter
Min
2.7
Typ
3.0
8
Max
3.3
20
85
5
0.3xV
DD
Unit
V
µA
°C
V
V
6
5
4
RF2
GND
V
DD
Power Supply
I
DD
Power Supply Current
(V
DD
= 3V, V
CTRL
= 3V)
T
OP
Operating temperature
Control Voltage High
Control Voltage Low
-40
0.7xV
DD
0
CTRL
Table 2. Pin Descriptions
Pin
No.
1
2
3
4
5
6
Pin
Name
V
DD
GND
RF1
CTRL
GND
RF2
Description
Nominal 3V supply connection.
Ground connection.
2
RF port.
1
CATVin
TE
Premium
Channel
Filter
PE4271
2-way
Splitter
PE4271
Figure 4. Typical Application Block Diagram
CATVout
Table 5. Control Logic Truth Table
CMOS or TTL logic level:
High = RF1 to RF2 signal path
Low = RF1 isolated from RF2
Ground connection.
3
RF port.
1
LE
High
1
Low
Control Voltage (CTRL)
Signal Path (RF1 to RF2)
ON
OFF
Notes: 1.
CTRL accepts both CMOS and TTL voltage leads.
O
Min
-0.3
-0.3
-65
Notes: 1. Both RF pins must be held at 0 V
DC
or require external DC
blocking capacitors
2. The exposed pad must be soldered to the ground plane for
proper switch performance.
Electrostatic Discharge (ESD) Precautions
Table 3. Absolute Maximum Ratings
Symbol
V
DD
V
I
T
ST
P
IN
V
ESD
Parameter/Condition
Power supply voltage
Storage temperature
Input power (50Ω),
CTRL=1/CTRL=0
Voltage on CTRL input
Max
4.0
5.5
Unit
V
V
BS
150
33/24
500
ESD voltage
(Human Body Model)
When handling this UltraCMOS™ device, observe
the same precautions that you would use with other
ESD-sensitive devices. Although this device
contains circuitry to protect it from damage due to
ESD, precautions should be taken to avoid
exceeding the rating specified in Table 3.
°C
Device Description
The
PE4271
high isolation SPST CATV Switch is
designed to support CATV applications such as
premium channel service connect/disconnect switch
blocks. This function is typically performed by bulky
and expensive mechanical switches. The high
isolation characteristics (60 dB at 1 GHz, 85 dB at
5 MHz), high compression point, and an integrated
75
Ω
(0.25
watt) input termination make the
PE4271
an ideal, low cost solution.
The control logic input pin (CTRL) is typically driven
by a 3-volt CMOS logic level signal, and has a
threshold of 50% of V
DD
. For flexibility to support
systems that have 5-volt control logic drivers, the
control logic input has been designed to handle a 5-
volt logic HIGH signal. (A minimal current will be
sourced out of the V
DD
pin when the control logic
input voltage level exceeds V
DD.
)
Document No. 70-0149-05
│
UltraCMOS™ RFIC Solutions
dBm
V
Exceeding absolute maximum ratings may cause
permanent damage. Operation should be restricted
to the limits in the Operating Ranges table.
Operation between operating range maximum and
absolute maximum for extended periods may reduce
reliability.
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Latch-Up Avoidance
Page 2 of 8
Unlike conventional CMOS devices, UltraCMOS™
devices are immune to latch-up.
Moisture Sensitivity Level
The Moisture Sensitivity Level rating for the
PE4271 in the 6-lead 3x3 DFN package is MSL1.
©2005-2009 Peregrine Semiconductor Corp. All rights reserved.
Peregrine products are protected under one or more of the following U.S. Patents: http://patents.psemi.com
PE4271
Product Specification
Typical Performance Data @ -40 °C to 85 °C (Unless Otherwise Noted)
(75
Ω
impedance except as indicated)
Figure 5. Insertion Loss - RF1 to RF2
Figure 6. 1dB Compression & 3
rd
Order
Intercept Point (T = 25°C)
Figure 7. Isolation - RF1 to RF2
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TE
PE4271
Product Specification
Typical Performance Data @ -40 °C to 85 °C (Unless Otherwise Noted)
(75-ohm impedance)
Figure 8. RF1 Return Loss (Switch = ON)
Figure 9. RF1 Return Loss (Switch = OFF)
Figure 10. RF2 Return Loss (Switch = ON)
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©2005-2009 Peregrine Semiconductor Corp. All rights reserved.
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Document No. 70-0149-05
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UltraCMOS™ RFIC Solutions
Peregrine products are protected under one or more of the following U.S. Patents: http://patents.psemi.com
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PE4271
Product Specification
Evaluation Kit
The
PE4271
EK board was designed to ease
customer evaluation of Peregrine’s high
performance SPST CATV MOSFET switch. RF1
is connected through a 75
Ω
transmission line via
the top left F connector, J1. RF2 is connected
through a 75
Ω
transmission line via the top right
F connector, J2. A 75
Ω
through transmission line
is available via F connectors J3 and J4. This
transmission line can be used to estimate the loss
of the PCB over the environmental conditions
being evaluated. V
DD
is supplied via J6-2, while
the control logic voltage is supplied via J5-2. It is
the responsibility of the customer to determine
proper supply decoupling for their design
application. It has been observed that by
removing C1 and C2 from the evaluation board
has not shown to degrade RF performance.
The board is constructed of a two metal layer FR4
material with a total thickness of 0.031”. The
bottom layer provides ground for the RF
transmission lines. The transmission lines were
designed using a coplanar waveguide model with
trace width of 0.021”, trace gaps of 0.030”,
dielectric thickness of 0.028”, metal thickness of
0.0021” and
ε
r
of 4.6. Note that the predominate
mode for these transmission lines is coplanar
waveguide with a ground plane.
Figure 11. Evaluation Board Layouts
Peregrine Specification 101/0167 (with F connectors)
BS
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Figure 12. Evaluation Board Schematic
Peregrine Specification 102/0245
LE
TE
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