Preliminary
5-33
RF2483
Rev A2 010904
5
*= Not testedinproduction
Parameter
Specification
Unit
Condition
Min.
Typ.
Max.
Variable Gain Amplifiers
Low Band
VCC=2.7V, EN=2.7V, Bandsel=0V,
FLO= 0dBm, PLO= 900MHz, LO LB and RF
OUT LB ports are matched to 50
Ω. Input IQ
1.2Vdc, signals driven differentially and in
quadrature from a 50
Ω source impedance.
TA=25
oC
Gain Control Voltage Range
0
2.0
V
Gain Control Range
32
36
dB
Difference between output power at
GC= 2.0V and 0.5V
Gain Control Slope
27
33
dB/V
Calculated using output power at GC =1.0V
and 1.5V
Gain Control Input Impedance*
10
k
Ω
Output Power
-3
0.8
3
dB
GC= 2.0V, IQ= 800mVP-P at 100kHz
-10
-6
-4
dB
GC= 1.5V, IQ= 800mVP-P at 100kHz
-25
-21
-19
dB
GC= 1.0V, IQ= 800mVP-P at 100kHz
-38
-35
-32
dB
GC= 0.5V, IQ= 800mVP-P at 100kHz
Output Noise at FLO+20MHz*
-156.4
dBm/Hz
GC= 2.0V, IQ= 800mVP-P at 100kHz
-157.2
dBm/Hz
GC= 2.0V, IQ= 0mVP-P
Output P1dB*
+6
dBm
IQ at 100kHz
Output IP3*
+19
dBm
GC= 2.0V. Extrapolated from IM3 with two
baseband tones at 90kHz and 110kHz
applied differentially, in quadrature, at both I
and Q inputs, each tone 400mVP-P.
Intermodulation IM3 tone at
FLO+70kHz and
FLO+ 130kHz relative to tone
at FLO+ 90kHz
Two baseband tones at 90kHz and 110kHz
applied at both I and Q inputs, each tone
400mVP-P.
40
47
dBc
GC= 2.0V
40
49
dBc
GC= 1.5V
30
41
dBc
GC= 1.0V
25
31
dBc
GC= 0.5V
MODE
EN
BANDSEL
COMMENTS
Sleep
0
X
I/Q and GC inputs go open circuit through the
use of a FET switch in sleep mode.
High Band Mode
1
1
LO input LO HB
RF output= RF OUT HB
Low Band Mode
1
0
LO input LO LB
RF output= RF OUT LB
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