Preliminary
8-92
RF2475
Rev A2 010918
8
NOTES:
4 LO IN to LNA IN isolation specification with the 1900MHz TX LO buffer on.
5 Image rejection measured with fRF=1930MHz, PRF=-105dBm, fLO=2065MHz; PIMAGE=-85dBm, fIMAGE=2220MHz.
Image interferer should be suppressed 11dB below desired signal at the IF output.
6 2LO +2RF Half IF Spur. (1/2 IF spur relative to P1/2RF)fRF=1930MHz, PRF=-105dBm, fLO=2065MHz;
F1/2IF=1997.5MHz, P1/2IF=-48dBm.
1/2 IF interferer should be suppressed 11dB below desired signal at the IF output.
Parameter
Specification
Unit
Condition
Min.
Typ.
Max.
PCS Receive Path, Cont’d
PCS Cascaded
Electrical Specifications
TAMB=25°C, VCC=2.8V, fRF=1960MHz,
fLO=2095MHz, fIF=135MHz,
LO Level= -7dBm, Image Filter I.L.= 3dB
Gain
24
26
28
dB
High Gain, Gain Select= High
6
dB
Low Gain, Gain Select=Low
Gain Step
17
20
dB
Gain Variations versus Tempera-
ture
+1.5
dB
-30°C to +85°C
Noise Figure
2.8
3.3
dB
High Gain, Gain Select= High
15
20
dB
Low Gain, Gain Select=Low
Input Third Order Intercept
-12
-10
dBm
High Gain, Gain Select= High
-2
-0.5
dBm
Low Gain, Gain Select=Low
Return Loss
10
dB
LNA Input - External Match
10
dB
LNA Output - External Match
10
dB
Mixer RF Input - External Match
10
dB
Mixer LO Input - External Match
Isolation
40
dB
LO IN to LNA IN, Gain Select= High4
40
dB
LO IN to LNA IN, Gain Select= Low
35
37
dB
Image Rejection5
>53
dB
LO IN to IF OUT
>40
dB
Mixer RF IN to IF OUT
35
dB
Mixer RF IN to TX LO OUT
Half IF Spur6
-68
dBc
IF Output Impedance
>10
k
Ω
Mixer “ON”
Supply Current
28
33
mA
Including the LO doubler, but not the TX LO
buffer
TX LO Buffer
LO Doubler Output Buffer
-5
-3
dBm
LO Input Level= -7dBm
Harmonic Output
-22
-25
dBc
LO Input Level= -7dBm
Doubler Harmonic Output
-45
-50
dBc
Fundamental Suppression
Isolation - LO OUT to LO IN
35
dB
TX LO Buffer ON
Supply Current
7.5
9.0
mA
Including the LO doubler and the TX LO
buffer
Logic
Input Low
0.5
V
VCC=2.7V to 2.9V
Input High
2.0
V
VCC=2.7V to 2.9V
Input Current
TBD
µA
Input Impedance
TBD
k
Ω
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