User Manual

MAX2102/MAX2105
Direct-Conversion Tuner ICs for
Digital DBS Applications
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(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.)
P
RFIN
= -19dBm per tone, AGC set via servo loop for
V
IOUT
= V
QOUT
= 0.5Vp-p per tone,
f1
RFIN
= 1448.1MHz, f2
RFIN
= 1449MHz,
f
LO
= 1451MHz
P
RFIN
= -19dBm per tone, AGC set via servo loop for
V
IOUT
= V
QOUT
= 0.5Vp-p per tone,
f1
RFIN
= 1200MHz, f2
RFIN
= 2150MHz,
f
LO
= 951MHz
f
RFIN
= 1441MHz,
f
LO
= 1451MHz
CONDITIONS
dBm6.5RFIN Input Third-Order Intercept
11.2
dBm15.1RFIN Input Second-Order Intercept
13.2
12.9
UNITSMIN TYP MAXPARAMETER
f
RFIN
= 950MHz to 2150MHz, 50Ω source
Defined as ∆NF/∆Gain; for AGC range,
defined as single-carrier power range
of -69dBm to -59dBm (MAX2102) or
-60dBm to -50dBm (MAX2105)
950MHz < f
RFIN
< 2150MHz, 950MHz < f
LO
<
2150MHz. Dominated by LO second-harmonic power
causing downconversion of unwanted channel. Test
conditions: f
LO
= 1075.5MHz, f
RFIN
= 2150MHz,
P
RFIN
= -69dBm (MAX2102) or -60dBm (MAX2105)
P
LO
= -15dBm, 950MHz < f
LO
< 2150MHz (Note 3)
P
LO
= -15dBm, P
LO
= -15dBm (differentially driven),
950MHz < f
LO
< 2150MHz (Note 3)
2.3:1
dB/dB
-0.5
Maximum Noise-Figure Variation with
AGC Gain Setting
RFIN Worst-Case VSWR across
Band
dBc-32.3
Maximum Power of Spurious
Downconversion Products
dBm
-49
-54
LO Leakage at RFIN
P
RFIN
= -69dBm
AGC = 4V,
P
RFIN
set via servo
loop for V
IOUT
=
V
QOUT
= 0.5Vp-p
MAX2102
MAX2102
dB
P
RFIN
= -60dBm MAX2105 15.7
P
RFIN
= -69dBm
f
RFIN
= 2141MHz,
f
LO
= 2151MHz
Noise Figure
MAX2105P
RFIN
= -60dBm 15.5
MAX2102
MAX2105 11.5
MAX2102
MAX2105 -0.7