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Complete SDARS Receiver
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2140 EV kit, current drawn at VOUTANT, I VOUTANT = 150mA max, V CC = 3.1V to 3.6V, VINANT = 3.1V to 5.3V, f RF = 2320MHz
to 2345MHz, f LO = 2076MHz, T A = -40°C to +85°C. Typical values are at V CC = VINANT = 3.3V, f RF = 2338MHz, T A = +25°C, unless
otherwise noted.) (Note 2)
Interstage (IF) 259MHz SAW filter specification: insertion loss = 19dB max, 9.3MHz to 12MHz from center attenuation = 24dB min,
beyond 12MHz from center attenuation = 40dB min.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RF AGC is at maximum gain,
IF AGC is at reference gain
+1
In-Band Input IP2 (Notes 5, 6)
I_IIP2
RF AGC is at maximum gain,
IF AGC is at reference gain -5dB
+6
dBm
RF AGC is at maximum gain,
IF AGC is at reference gain -25dB
RF AGC is at maximum gain,
IF AGC is at reference gain
+27
+38
Out-of-Band Input IP2
(Notes 5, 7)
O_IIP2
RF AGC is at maximum gain -7dB,
IF AGC is at reference gain
+45
dBm
RF AGC is at maximum gain -25dB,
IF AGC is at reference gain
+60
Opposite Sideband Rejection
Image Rejection
Half IF Rejection
OSR
IRej
HRej
Baseband frequencies = 100kHz (Note 4)
At f LO - f IF
At f LO + 0.5 x f IF
32
39
54
53
dB
dB
dB
RF AGC LOOP
LNA Gain Reduction
RFAGC_
Range
(Note 4)
30
42
dB
Minimum RF AGC Trip Point
RFAGC_min Bits RF4/3/2/1/0 = 00000 (BIN)
-35
dBm
RF AGC Trip Point
RFAGC_int
Bits RF4/3/2/1/0 = 00010 (BIN) (Note 4)
-37
-33
-29
dBm
Maximum RF AGC Trip Point
RFAGC_max Bits RF4/3/2/1/0 = 10100 (BIN)
-15
dBm
FRONT-END (FE) PROGRAMMABLE GAIN
FE Programmable Gain Range
FE_Rge
(Note 4)
19
22
26
dB
FE Programmable Gain Step
FE_Step
2
dB
IF FILTER INTERFACE
IF Output Differential Admittance
Input Differential Impedance
Presented by the IC to the IF
Filter Output
Yout, IF
Zin, IF
Between pins IFOUT+, IFOUT-,
f IF = 259MHz and 467MHz
Between pins IFOUT+, IFOUT-,
f IF = 259MHz and 467MHz
1/900
+ j0
150
+ j0
S
?
IF AGC LOOP
IF AGC Control Voltage for Max
Gain
IF AGC Control Voltage for Min
Gain
IFAGC_VM
IFAGC_Vm
Applied at pin AGCPWM
Applied at pin AGCPWM
0.2
2.5
V
V
4
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