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Complete Direct-Conversion L-Band Tuner
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2121 Evaluation Kit: V CC = +3.13V to +3.47V, T A = -40°C to +85°C, default register settings except BBG[3:0] = 1111. Typical
values measured at V CC = +3.3V, T A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VOLTAGE-CONTROLLED OSCILLATOR AND LO GENERATION
Guaranteed LO Frequency Range
LO Phase Noise
f OFFSET = 10kHz
f OFFSET = 100kHz
f OFFSET = 1MHz
925
-97
-100
-122
2175
MHz
dBc/Hz
XTAL/REFERENCE OSCILLATOR INPUT AND OUTPUT BUFFER
XTAL Oscillator Frequency
Range f XTAL
Parallel-resonance-mode crystal (Note 7)
12
30
MHz
Input Overdrive Level
AC-coupled sine-wave input
0.5
1
2.0
V P-P
XTAL Output-Buffer Divider
Range
1
8
XTAL Output Voltage Swing
12MHz to 30MHz, C LOAD = 10pF
1
1.5
2
V P-P
XTAL Output Duty Cycle
50
%
Note 1: Min/max values are production tested at T A = +25°C. Min/max limits at T A = -40°C and T A = +85°C are guaranteed by
design and characterization.
Note 2: Guaranteed by design and characterization at T A = +25°C.
Note 3: Input gain range specifications met over this band.
Note 4: In-band IIP3 test conditions: GC1 set to provide the nominal baseband output drive when mixing down a -23dBm tone at
2175MHz to 5MHz baseband (f LO = 2170MHz). Baseband gain is set to its default value (BBG[3:0] = 1011). Two tones at
-26dBm each are applied at 2174MHz and 2175MHz. The IM3 tone at 3MHz is measured at baseband, but is referred to the
RF input.
Note 5: Out-of-band IIP3 test conditions: GC1 set to provide nominal baseband output drive when mixing down a -23dBm tone at
2175MHz to 5MHz baseband (f LO = 2170MHz). Baseband gain is set to its default value (BBG[3:0] = 1011). Two tones at
-20dBm each are applied at 1919MHz and 1663MHz. The IM3 tone at 5MHz is measured at baseband, but is referred to the
RF input.
Note 6: Input IP2 test conditions: GC1 set to provide nominal baseband output drive when mixing down a -23dBm tone at 2175MHz
to 5MHz baseband (f LO = 2170MHz). Baseband gain is set to its default value (BBG[3:0] = 1011). Two tones at -20dBm
each are applied at 925MHz and 1250MHz. The IM2 tone at 5MHz is measured at baseband, but is referred to the RF input.
Note 7: See Table 16 for crystal ESR requirements.
4
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