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RF1

RF2

V1

50

Ω

50

Ω

CMOS

Control

Driver

ESD

ESD

V2

RFC

The SP4251 is a SPDT (single pole double throw)

RF Switch for use in general switching applications

and mobile infrastructure. This device offers a flexible

supply voltage of 3.3/5V, single-pin or complementary

pin control inputs, and 4kV ESD tolerance. It presents a simple

alternative solution to pin diode and mechanical relay switches.

SIPAT’s COMS technology enhancements deliver high

linearity and exceptional performance. It is an innovative

feature of the CMOS process, providing performance

superior to GaAs with the economy and integration of

conventional CMOS.

Product Specification

SPDT COMS RF Switch

10 – 3000 MHz, Absorptive

Product Description

Figure 1. Functional Diagram

SP4251

Features

V ±10% supply (see table 3)

Figure 2. Package Type

8-lead MSOP with exposed paddle

Table 1. Target Electrical Specifications

Notes:

1. Device linearity will begin to degrade below 10 MHz.

Parameter

Conditions

Min

Typical

Max

Units

10

3000

MHz

Insertion Loss (RF1/RF2)

10 MHz

0.55

0.60

dB

1000 MHz

0.60

0.70

dB

2000 MHz

0.75

0.85

dB

3000 MHz

0.75

0.90

dB

Isolation (RFC to RF1/RF2)

1000 MHz

61

62

dB

2000 MHz

51

53

dB

3000 MHz

42

43

dB

Return Loss

1000 MHz

26

dB

2000 MHz

23

dB

3000 MHz

22

dB

50 - 3000 MHz

30.5

dBm

Input IP3

50 - 3000 MHz, +18 dBm per tone, 5 MHz spacing

59

dBm

Switching Time

50% CTRL to 10/90% RF

150

300

ns

Tel: +86-23-62808818

Fax: +86-23-62805284

www.sipatsaw.com / sawmkt@sipat.com