Preliminary
5-32
RF2483
Rev A2 010904
5
Parameter
Specification
Unit
Condition
Min.
Typ.
Max.
Variable Gain Amplifiers
High Band
VCC=2.7V, EN=2.7V, Bandsel=2.7V,
FLO= 0dBm, PLO= 1900MHz, LO HB and
RF OUT HB ports are matched to 50
Ω. Input
IQ signals driven differentially and in quadra-
ture from a 50
Ω source impedance.
TA=25
oC
Gain Control Voltage Range
0
2.0
V
Gain Control Range
32
35
dB
Difference between output power at
GC= 2.0V and GC= 0.5V
Gain Control Slope
23
29
dB/V
Calculated GC =1.0V and 1.5V
Gain Control Input Impedance*
10
k
Ω
Output Power
-3
0.4
3
dB
GC= 2.0V, IQ= 800mVP-P at 100kHz
-11
-7
-5
dB
GC= 1.5V, IQ= 800mVP-P at 100kHz
-23
-20
-17
dB
GC= 1.0V, IQ= 800mVP-P at 100kHz
-36
-35
-30
dB
GC= 0.5V, IQ= 800mVP-P at 100kHz
Output Noise at FLO+ 20MHz*
-155
dBm/Hz
GC= 2.0V, IQ= 800mVP-P at 100kHz
-156.7
dBm/Hz
GC= 2.0V, IQ= 0mVP-P
Output P1dB*
+6
dBm
IQ at 100kHz
Output IP3*
+20
dBm
GC= 2.0V. Extrapolated from IM3 with two
baseband tones at 90kHz applied differen-
tially, 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 differentially, in quadrature, at both I
and Q inputs, each tone 400mVP-P.
40
50
dBc
GC= 2.0V
40
50
dBc
GC= 1.5V
30
35
dBc
GC= 1.0V
30
35
dBc
GC= 0.5V
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