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RF2958
Rev A0 050209
Parameter
Specification
Unit
Condition
Min.
Typ.
Max.
Receiver
IF VGA/Baseband, cont’d
Group Delay
15
ns
Filter Rejection
dB
Transfer function - 3 pole Bessel at 9MHz
Output Impedance
20
Ω
f<1MHz
I/Q Magnitude Error
±0.35
dB
I/Q Phase Error
±3.0
°
I/Q DC Offset
10
mV
SQRT [(VOUTI-VREF)^2+(VOUTQ-VREF)^2)]
DC Step
40
mV
VGC step 1.3V to 1.8V, PIN=-50dBm
VREF
1.65
1.7
1.75
V
3% variation
VREF Output Current
1.0
mA
Source
Transmitter
Modulator/Baseband
I/Q Magnitude Error
±0.35
dB
I/Q Phase Error
±3.0
°
Input Signal (Single-Ended)
200
mVP-P
Input Signal Magnitude
282
mVP-P
SQRT(I^2+Q^2)
Input P1dB
566
mVP-P
6dB from input
Voltage Gain to IF
4
6
8
dB
Measure from complex magnitude to IFVP-P
Output Voltage
448
564
710
mVP-P
Output SNR
32
dB
Connected to SAW filter
Carrier Leakage
-20
dBc
Single sideband modulation
VGA Driver/Upconverter
Input P1dB
550
mVP-P
6dB from max input
Input Referred Noise
20
uVRMS
Measured in 11MHz bandwidth at 2.442GHz
upconverter gain >12dB
Minimum Gain
0
dB
TX VGC at 1.3V
Maximum Gain
17
dB
TX VGC at 1.9V
Gain Response Time
300
ns
Measured with 300mV change in gain on
TXVGC to 90% of final POUT.
Image Rejection
30
dB
RF LO Leakage
-25
-36
dBm
FLO=2048MHz to 2110MHz
Output Voltage
1000
mVP-P
802.11b output with 7dB to 20dB gain
(needed for +20dBm POUT).
Minimum Output Power
-12
dBm
TXVGC at 1.3V
Maximum Output Power
0
dBm
Meeting 802.11b Spectral Mask
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