SP4280 Datasheet, PDF (1/7 Pages) SIPAT Co,Ltd – 75
SPDT CATV CMOS

Product Description
The SP4280 is an CMOS Switch designed for CATV
applications, covering a broad frequency range from DC up to
2.2 GHz. This single-supply SPDT switch integrates a two-pin
CMOS control interface. It also provides low insertion loss with
extremely low bias requirements while operating on a single 3 V
supply. In a typical CATV application, the SP4280 provides for
a cost effective and manufacturable solution when compared to
mechanical relays.
The SP4280 is manufactured on SIPAT’s CMOS
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
RFC
75
RF1
RF2
Product Specification
SP4280
75 Ω SPDT CATV CMOS
Switch 5 MHz - 2.2 GHz
Features
• 75 Ω characteristic impedance
• Integrated 75 Ω terminations
• CTB performance of 85 dBc
• High isolation 60 dB at 1 GHz
• Low insertion loss: typically 0.5 dB at
5 MHz, 1.1 dB at 1 GHz
• High input IP3: 50 dBm
• CMOS two-pin control
• Single +3 V supply operation
• Low current consumption: 8 µA
• Unique all off terminated mode
• 4x4 mm QFN package
Figure 2. Package Type
20-lead 4x4 mm QFN
75
CMOS
75
Control
Driver
C1 C2
Table 1. Electrical Specifications @ +25 °C (Z_S = Z_L = 75 Ω)
Parameter
Operating Frequency¹
Insertion Loss
Condition
5 MHz – 250 MHz
250 MHz – 750 MHz
750 MHz – 1000 MHz
1000 MHz – 2200 MHz
Minimum
5
Isolation
5 MHz – 250 MHz
67
250 MHz – 750 MHz
60
750 MHz – 1000 MHz
57
1000 MHz – 2200 MHz
44
Input IP2²
5 MHz - 1000 MHz
Input IP3²
5 MHz - 1000 MHz
50
Input 1dB Compression²
1000 MHz
29
CTB / CSO
77 & 110 channels;
Power Out = 44 dBmV
Switching Time
Video Feedthrough³
50% CTRL to 10/90 RF
5 MHz - 1000 MHz
Notes:
1. Device linearity will begin to degrade below 5 MHz.
2. Measured in a 50 Ω system.
3. Measured with a 1 ns risetime, 0/3 V pulse and 500 MHz bandwidth
Typical
0.5
0.8
0.9
1.1
72
65
60
47
75
50
26
-85
2
Maximum
2200
0.6
0.95
1.1
1.3
15
Tel: [phone] Fax: [phone] www.sipatsaw.com / [e-mail]
Units
MHz
dB
dB
dBm
dBm
dBm
dBc
µs
mV_pp
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