S1M8656A Samsung Semiconductor, Inc., S1M8656A Datasheet - Page 9

• Manufacturer Part Number: S1M8656A
• Description: Cdma/amps Dual Mode If/ Baseband Ic
• Manufacturer: Samsung Semiconductor, Inc.

RX IF/BBA WITH AGC
AC CHARACTERISTICS (Continued)
Offset adjust input
I/Q gain mismatch Gain mismatch between the I and Q signals
IF input frequency
Spurious contents ADC generated harmonic frequency
related to jammer
Offset gain slope
Spurious content
jammer desense
Crosstalk CDMA
Characteristic
Noise figure
Single-tone
impedance
attenuation
Out-band
range
to FM
IIP3
The IF frequency is increased to find the
frequency where the gain falls below -3dB.
Input power = - 98dBm
Input power = - 75dBm
Input power = - 25dBm
AGC gain Max.
AGC gain Min.
component. ADC generated Two signals in the
in-band are each mixed with signals which will
allow ADC to produce -7dB output signals.
The harmonic and non-harmonic components
of the ADC output signals between 1kHz –
20MHz are extracted and added. The AGC
control voltage is controlled so that ADC
output is full scale when the input signal is -
80dBm.
In-band spurious peak value produced by IMD
based on 2 jammer signals.
One in-band signal(@1kHz,0.5*F/S)
and two jammers(@60kHz, 22dB*F/S and
@122kHz, 4dB*F/S)are simultaneously input.
AGC control voltage is controlled so that ADC
output is F/S when the input signal is -80dBm.
Overall gain reduction due to one jammer.
The in-band signal at -93dBm (control the
AGC control voltage to 0.5*F/S)and the
jammer signal at 900kHz and -53dBm are
simultaneously input. The gain reduces if the
input/output range is small in BBA.
The leak ratio between the CDMA input and
FM input.
Amount of code change of the voltage ADC
output at the I/Q offset control
between 1kHz to 12kHz.
45kHz
60MHz
Test Conditions
-
IIP3max
Symbol
IIP3min
NFmax
ATC12
NFmin
NFmid
GOFS
TSpur
CTCF
Jdsen
ATC9
Jspur
Gmis
Zoff
Fin
Min
100
-55
-25
30
46
60
-1
-
-
-
-
-
-
85.38
Typ
250
20
70
7
-
-
-
-
-
-
-
-
-
-18.4
Max
150
-42
1.0
1
-
-
-
-
-
-
-
-
-
S1M8656A
%FS/V
dBm
dBm
MHz
Unit
dBc
dBc
k
dB
dB
dB
dB
dB
dB
dB
dB
9