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8-308
RF2498
Rev A4 070308
Cascaded Performance (Typical Values for VCC=2.75V)
NOTE: All total current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode).
Cellular CDMA Gain Control
Parameter
GPS
Cascaded:
High IIP3 LNA Mode, IPSET=1
IPSET=0
Gain (dB)
35.5
34.5
Noise Figure (dB)
1.6
1.6
Input IP3 (dBm)
-23.0
-22.0
Total Current (mA)
24
22
NOTE: Assumes 1.5dB image filter insertion loss. The TX
Buffer Enable is off. /2 Select is off.
Mode
LNA GAIN MIX GAIN
Comments
High Gain
1
1
IMD Test 1 and 2
Mid Gain
1
0
IMD Test 3 and 4
Low Gain
0
1
IMD Test 5 and 6 option 1
Ultra Low Gain
0
0
IMD test 5 and 6 option 2
Note: Contact RFMD for Application note on gain control PCBA layout and software recommendations.
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