MAX2108(1999) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2108 Datasheet PDF : 12 Pages
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Direct-Conversion Tuner IC
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V; PS_SEL = 0.5V; PRFIN = -20dBm; fLO = fRFIN +125kHz; GC set via servo loop for VIOUT - V IOUT = 200mVp-p (differen-
tial); TA = +25°C; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Prescaler Divide Ratio
VPS_SEL > 2.4V
VPS_SEL < 0.5V
32
32
33
33
Differential Prescaler Output
Swing
VPSOUT -
V PSOUT
CPSOUT = C PSOUT = 10pF to GND
1.0
Vp-p
I/Q Channel Quadrature
Phase Error (Note 2)
fIOUT = f IOUT = fQOUT = f QOUT = 125kHz
3 degrees
I/Q Amplitude Mismatch
(Note 2)
fIOUT = f IOUT = fQOUT = f QOUT = 125kHz
1
dB
I/Q Channel Clipping Level
Baseband Bandwidth
I/Q Channel Differential
Output Impedance
fIOUT = f IOUT = fQOUT = f QOUT = 10MHz,
no output load
At -3dB attenuation
fIOUT = f IOUT = fQOUT = f QOUT = 20MHz
1.4
Vp-p
150
MHz
33
Ω
Note 1: AC specifications with minimum/maximum limits are met within this frequency range.
Note 2: LO and LO are differentially driven through an AC-coupled matching network.
Note 3: PRFIN = -20dBm per tone, GC set via servo loop for VIOUT - V IOUT = 20mVp-p per tone. f1RFIN = 1749MHz, f2RFIN =
1751MHz, fLO = 1740MHz.
Note 4: PRFIN = -20dBm per tone, GC set via servo loop for VIOUT - V IOUT = 20mVp-p per tone. f1RFIN = 1200MHz, f2RFIN =
2150MHz, fLO = 951MHz.
(TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
125
120
115
TA = +70°C
110
105
TA = +25°C
100
95
TA = 0°C
90
4.75 4.85 4.95 5.05 5.15 5.25
VCC(V)
Typical Operating Characteristics
CARRIER LEVEL vs. GAIN CONTROL
0
GC SET FOR 10mVp-p
-10
BASEBAND OUTPUT
-20
fRFIN = 1750 MHz
-30
-40
-50
-60
-70
-80
1 1.5 2 2.5 3 3.5
GC VOLTAGE (V)
INPUT IP3 vs. FREQUENCY
10
8
6
4
TWO-TONE FREQUENCY
SPACING EQUALS 2MHz
2
0
900
1100 1300 1500 1700
RF FREQUENCY (MHz)
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