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RF2890
Rev A4 040421
Operation Mode Control Table
Gain Control Logic Table
VCO Options and Divider Logic Table
Mode
BAND SEL
Cellular CDMA
0
GPS
1
Gain Setting
Resulting Gain State
VG1
VG2
Cellular
LNA
GPS
LNA
Comments
0
0
High Gain
High Gain
Cellular CDMA IMD Test 1 and 2
1
0
Mid Gain
High Gain
Cellular CDMA IMD Test 3 and 4
1
1
Low Gain
High Gain
Cellular CDMA IMD Test 5 and 6
0
1
Low Gain
High Gain
Cellular CDMA IMD Test 5 and 6
Dual-Band Application
Dual VCO Configuration
2GHz CDMA VCO
1.4GHz GPS VCO
DIV SEL pin tied to BAND SEL
MODE
CONTROL PINS
ON-CHIP LO PRESCALER RESULT
DIV SELECT
BAND SEL
Divide-by-2
CDMA Cellular
0
0
ON
GPS
1
1
OFF
Dual-Band Application
Dual VCO Configuration
1GHz CDMA VCO
1.4GHz GPS VCO
DIV SEL pin tied to VCC
MODE
CONTROL PINS
ON-CHIP LO PRESCALER RESULT
DIV SELECT
BAND SEL
Divide-by-2
CDMA Cellular
1
0
OFF
GPS
1
1
OFF
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