User Manual

MAX2102/MAX2105
Direct-Conversion Tuner ICs for
Digital DBS Applications
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2102 EV kit circuit (Figure 1); V
CC
= +5V; PSGND = open; MOD = GND; f
RFIN
= 2150MHz; P
RFIN
= -19dBm; f
LO
=
2150.125MHz; P
LO
= -15dBm driven single-ended into LO; AGC set via servo loop for V
IOUT
= V
QOUT
= 0.5Vp-p; IOUT, QOUT drive
AC-coupled 100Ω loads; 2kΩ from PSOUT to GND; T
A
= +25°C; unless otherwise noted.)
2kΩ || 10pF load
T
A
= 0°C to +70°C
(Note 2)
(Note 1)
At -3dB attenuation
P
RFIN
= -50dBm; AGC = 4V, V
CC
= 5.0V
PSOUT load = 2kΩ || 5pF (Note 3)
Vp-p0.8Prescaler Output Swing at PSOUT
950MHz < f
RFIN
< 2150MHz;
950MHz < f
LO
< 2150MHz; P
RFIN
= -40dBm;
f
IOUT
, f
QOUT
= 125kHz (Note 2)
950MHz < f
RFIN
< 2150MHz;
950MHz < f
LO
< 2150MHz; P
RFIN
= -40dBm;
f
IOUT
, f
QOUT
= 125kHz (Note 2)
f
LO
= 950MHz to 2150MHz, 50Ω source into
MAX2102 EV kit match circuit
(Note 4)
Refers to power level driven into LO,
LO (differentially driven) (Notes 2, 4)
65 65
(Notes 2, 5)
CONDITIONS
64 64
Prescaler Divide Ratio
MHz94
Baseband Bandwidth
(at IOUT, QOUT)
Vp-p2.7IOUT, QOUT Clipping Level
%35 65Prescaler Duty Cycle at PSOUT
1kHz < (f
IOUT,
f
QOUT
) < 25MHz, 950MHz < f
RFIN
<
2150MHz, 950MHz < f
LO
< 2150MHz (Notes 3, 7, 8)
1kHz < (f
IOUT,
f
QOUT
) < 25MHz, 950MHz < f
RFIN
<
2150MHz, 950MHz < f
LO
< 2150MHz (Notes 3, 7, 8)
ns0.45
dB0.45 0.85
Baseband Gain Ripple
(at IOUT, QOUT)
Baseband Group Delay Ripple
(at IOUT, QOUT)
MHz950 2150LO Input Frequency Range
dB0.5IOUT, QOUT Amplitude Imbalance
degrees3IOUT, QOUT Phase Imbalance
1.75:1
LO Input Worst-Case VSWR over
Band
-15 -5
LO Input Power Level dBm
-15
dB28RFIN to LO Input Isolation
UNITSMIN TYP MAXPARAMETER
MOD = low
MOD = high
T
A
= +25°C to +70°C (Notes 2 and 6)
degrees
-0.1 0.6
Worst-Case Additional Phase
Imbalance Over Temperature
T
A
= +25°C to +0°C (Note 2) -0.07 1
OSCILLATOR BUFFER, QUADRATURE GENERATOR, PRESCALER
BASEBAND AC CHARACTERISTICS