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Complete DBS Direct-Conversion Tuner ICs
with Monolithic VCOs
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2116/MAX2118 EV kits, V CC = +4.75V to +5.25V, GC1 and GC2 set for maximum gain, V GND = 0, V IOUT = V QOUT = 800mV P-P
(MAX2116), loaded with 1k Ω V IOUT ± = V QOUT ± = 590mV P-P differential (DL = 0, MAX2118), V IOUT ± = V QOUT ± = 1V P-P differential (DL
= 1, MAX2118), loaded with differential 2k Ω . Baseband LPF BW = 33MHz, f RFIN = 2175MHz. For default register values, see the
Serial Interface and Control Registers section. T A = +25°C to +85°C. Typical values are at V CC = +5V, T A = +25°C, unless otherwise
noted.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V GC1 = 0.75V (max gain), bit DL = 1,
bits GC2(4) - GC2(0) = 00000 (max gain)
-77
-72
Input Carrier Levels Necessary to Produce
1V P-P (Differential) at I/Q Baseband Outputs
(MAX2118)
for output ≥ 800mV P-P
V GC1 = 2.6V (min gain), bit DL = 1,
dBm
bits GC2(4) - GC2(0) = 11111 (min gain),
for output ≤ 800mV P-P
V GC1 = 0.75V (max gain), bit DL = 0,
3
16
bits GC2(4) - GC2(0) = 00000 (max gain),
-77
-72
Input Carrier Levels Necessary to Produce
590mV P-P (Differential) at I/Q Baseband
Outputs (MAX2118)
for output ≥ 800mV P-P
V GC1 = 2.6V (min gain), bit DL = 0,
dBm
bits GC2(4) - GC2(0) = 11111 (min gain),
for output ≤ 800mV P-P
3
16
RF Gain Control (GC1) Range
Baseband Gain Control (GC2) Range
IIP3
IIP2
NF
Minimum RF Input Return Loss
0.75V < V GC1 < 2.6V
Bits GC2(4) - GC2(0) = 00000 to 11111
(Note 5)
(Note 6)
V GC1 = 0.75V (max gain), bits GC2(4) -
GC2(0) = 00000 (max gain)
75 Ω input source, 850MHz < f RFIN < 2175MHz
60
19
69
24
10
22
10.5
13.5
dB
dB
dBm
dBm
dB
dB
Maximum LO Leakage at RFIN
850MHz < f LO < 2175MHz (Note 7)
-80
-63
dBm
LO-Generated RFIN Second Harmonic
Rejection
Unwanted in 850MHz to 2175MHz band
(Note 7)
Unwanted = 2250MHz
33
30
50
45
dB
BASEBAND OUTPUTS
Unwanted above 2250MHz
6dB/oct
Baseband I/Q Output Impedance
Baseband Highpass -3dB Point
Quadrature Phase Error
Quadrature Gain Error
Single ended, real Z OUT
0.1μF capacitors at IDC±, QDC±
125kHz baseband test tone
125kHz baseband test tone
30
850
4
1.2
Ω
Hz
Degrees
dB
Baseband Lowpass BW Range
LP Filter BW Accuracy
Ratio of In-Filter-Band to Out-of-Filter-Band
Noise
Baseband -3dB cutoff frequency
Fc = 4MHz
Fc = 33MHz (Note 7)
f INBAND = 100Hz to 22.5MHz,
f OUTBAND = 87.5MHz to 112.5MHz
4
-5.5
-10
25
33
+5.5
+10
MHz
%
%
dB
4
_______________________________________________________________________________________
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