Document
SP8T Antenna Switch for GSM/UMTS
CXG1228XR
Description
The CXG1228XR is a high power SP8T antenna switch for GSM/UMTS applications. The low insertion loss on transmit means increased talk time as the Tx power amplifier can be operated at a lower output level. On chip logic reduces component count and simplifies PCB layout by allowing direct connection of the switch to digital baseband control lines with CMOS logic levels. It requires 3 CMOS control lines. The Sony GaAs JPHEMT MMIC process is used for low insertion loss. www.DataSheet4U.com (Applications: GSM/UMTS dual-mode handsets)
Features
Insertion loss (Tx1) 0.35dB (Typ.) @34dBm (GSM 900)
Package
Small and low height package size: 20-pin XQFN (2.7mm × 2.7mm × 0.4mm (Max.))
Structure
GaAs JPHEMT MMIC
This IC is ESD sensitive device. Special handling precautions are required. The actual ESD test data will be available later.
-1-
E06438-CR
CXG1228XR
Absolute Maximum Ratings
(Ta = 25°C) Bias voltage Control voltage Input power max. (Tx1) Input power max. (Tx2) Input power max. (UMTS1, UMTS2) Input power max. (all_Rx) Operating temperature Storage temperature
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VDD Vctl
7 5 36 34 32 13 – 35 to + 85 – 65 to + 150
V V dBm (Duty cycle = 12.5 to 50%) dBm (Duty cycle = 12.5 to 50%) dBm dBm
°C °C
-2-
CXG1228XR
Block Diagram
F9 Tx2 F2 Tx1 F1 F8 UMTS2 F16 F17 UMTS1
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F3
Rx1 (GSM850) F10
F6 F14 F5
Rx2 (GSM1900) F13
Rx3 (GSM1800) F12
F7 F15 F4 Ant Rx4 (GSM900) F11
-3-
CXG1228XR
Pin Configuration
UMTS2
GND
Tx1
GND 7
10 GND UMTS1 GND Ant GND
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9
8
Tx2 6 5 4 3 2 1 GND Rx1 Rx2 Rx3 Rx4 20 GND
11 12 13 14 15 16 VDD 17 CTLA 18 CTLB 19 CTLC
Truth Table
CTL A B C
Mode Tx1 GSM850/900
F1
F2
F3
F4
F5
F6
F7
F8
F9 F10 F11 F12 F13 F14 F15 F16 F17
H H L ON OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON OFF ON OFF ON
Tx2 H L L OFF ON OFF OFF OFF OFF OFF ON OFF ON ON ON ON OFF ON OFF ON GSM1800/1900 Rx1 GSM850 Rx2 GSM1900 Rx3 GSM1800 Rx4 GSM900 UMTS1 UMTS2 L L L OFF OFF ON OFF OFF OFF OFF ON ON OFF ON ON ON ON ON OFF ON L H L OFF OFF OFF OFF OFF ON OFF ON ON ON ON ON OFF ON ON OFF ON L H H OFF OFF OFF OFF ON OFF OFF ON ON ON ON OFF ON ON ON OFF ON L L H OFF OFF OFF ON OFF OFF OFF ON ON ON OFF ON ON ON ON OFF ON H L H OFF OFF OFF OFF OFF OFF ON ON ON ON ON ON ON OFF OFF OFF ON H H H OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON ON OFF ON ON OFF
DC Bias Condition
(Ta = – 35°C to + 85°C) Item Vctl (H) Vctl (L) VDD Min. 2.0 0 2.8 Typ. 2.8 — — Max. 3.6 0.4 3.6 Unit V V V
-4-
CXG1228XR
Electrical Characteristics
(Ta = 25°C) Item Insertion loss Symbol IL Port ANT - Tx1 ANT - Tx2 ANT - Rx1 ANT - Rx2 ANT - Rx3 ANT - Rx4 ANT - UMTS1 ANT - UMTS2
www.DataSheet4U.com Isolation
Condition
*1 *2 *3, *4 *5, *6 *5, *6 *3, *4 *7 *8 *7 *8
Min.
ISO.
ANT - Rx1 ANT - Rx2 ANT - Rx3 ANT - Rx4 ANT - Tx2 ANT - UMTS1 ANT - UMTS2 ANT - Rx1 ANT - Rx2 ANT - Rx3 ANT - Rx4 ANT - Tx1 ANT - UMTS1 ANT - UMTS2 ANT - Rx1 ANT - Rx2 ANT - Rx3 ANT.