CX74038 Datasheet, PDF (1/12 Pages) Skyworks Solutions Inc. – 2.6 GHz/800 MHz Dual Fractional-N/lnteger-N Frequency Synthesizer

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
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
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.
VDD1_RF 1
VDD2_RF 2
CPO_RF 3
GND 4
RFIN 5
RFINB 6
GND 7
FREF 8
GND 9
LD_TP 10
20 VDD1_IF
19 VDD2_IF
18 CPO_IF
17
GND
16 IFIN
15 IFINB
14 GND
13
LE
12
DAT
11 CLK
C1452
Figure 1. CX74038 Pinout – 20-Pin TSSOP
(Top View)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
101075I • Skyworks Proprietary and Confidential information • Products and product information are subject to change without notice • January 31, 2005
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