DATA SHEET
CX74038: 2.6 GHz/800 MHz Dual Fractional-N/lnteger-N
Frequency Synthesizer
Applications
•
Multi-slot GSM/DCS
•
PCS/W-CDMA
•
Portable communication systems
•
Dual-mode cellular telephone systems
•
Spread spectrum receivers
•
Wireless LAN systems
•
Wireless routers and WLL systems
•
SATCOM receivers
Description
The Skyworks CX74038 is a complete, low-power
2.6 GHz/800 MHz dual frequency synthesizer. The device provides
both Radio Frequency (RF) channels and Intermediate Frequency
(IF) channels. Fractional-N operation offers low phase noise, fast
settling time, and low spurious tones for RF channels. A standard
integer-N division is used for IF channels.
The three-wire serial interface provides programmable control of
the frequency synthesizer to support dual-conversion
transceivers.
The 20-pin Thin Shrink Small Outline Package (TSSOP) device
package and pin configuration are shown in Figure 1. A functional
block diagram of the CX74038 is shown in Figure 2.
Features
•
Maximum operating frequency: 2.6 GHz
•
Maximum IF synthesizer frequency: 800 MHz
•
Supply voltage as low as 2.6 V
•
Fast frequency settling time with fractional-N operation
•
Internal fractional spur reduction
•
Programmable charge pump currents
•
Digital lock detector
•
Power saving at lower frequency
•
TSSOP (20-pin, 6.5 x 4.4 x 1.0 mm) package
VDD1_RF
VDD2_RF
CPO_RF
GND
RFIN
RFINB
GND
FREF
GND
LD_TP
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VDD1_IF
VDD2_IF
CPO_IF
GND
IFIN
IFINB
GND
LE
DAT
CLK
C1452
Figure 1. CX74038 Pinout – 20-Pin TSSOP
(Top View)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
101075I • Skyworks Proprietary and Confidential information • Products and product information are subject to change without notice • January 31, 2005
1
SKYWORKS [ SKYWORKS SOLUTIONS INC. ]
