Rainbow Electronics MAX2108 - Manual (Page 3)

MAX2108
Direct-Conversion Tuner IC
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS (continued)
(V CC = +5V; PS_SEL = 0.5V; P RFIN = -20dBm; f LO = f RFIN +125kHz; GC set via servo loop for V IOUT - V IOUT = 200mVp-p (differen-
tial); T A = +25°C; unless otherwise noted.)
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: P RFIN = -20dBm per tone, GC set via servo loop for V IOUT - V IOUT = 20mVp-p per tone. f1 RFIN = 1749MHz, f2 RFIN =
1751MHz, f LO = 1740MHz.
Note 4: P RFIN = -20dBm per tone, GC set via servo loop for V IOUT - V IOUT = 20mVp-p per tone. f1 RFIN = 1200MHz, f2 RFIN =
2150MHz, f LO = 951MHz.
CONDITIONS UNITS MIN TYP MAX SYMBOL PARAMETER
V PS_SEL < 0.5V
C PSOUT = C PSOUT = 10pF to GND
33 33
V PS_SEL > 2.4V
Prescaler Divide Ratio
Vp-p 1.0
V PSOUT -
V PSOUT
Differential Prescaler Output
Swing
32 32
At -3dB attenuation
f IOUT = f IOUT = f QOUT = f QOUT = 20MHz
MHz 150
f IOUT = f IOUT = f QOUT = f QOUT = 125kHz
Baseband Bandwidth
Ω 33
I/Q Channel Differential
Output Impedance
degrees 3
I/Q Channel Quadrature
Phase Error (Note 2)
f IOUT = f IOUT = f QOUT = f QOUT = 125kHz dB 1
I/Q Amplitude Mismatch
(Note 2)
f IOUT = f IOUT = f QOUT = f QOUT = 10MHz,
no output load
Vp-p 1.4 I/Q Channel Clipping Level
Typical Operating Characteristics
(T A = +25°C, unless otherwise noted.)
90
100
95
110
105
120
115
125
4.75 4.95 4.85 5.05 5.15 5.25
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2108 toc01
V CC (V)
I CC
(mA)
T A = +70°C
T A = +25°C
T A = 0°C
-80
-70
-60
-50
-40
-30
-20
-10
0
1 1.5 2 2.5 3 3.5
CARRIER LEVEL vs. GAIN CONTROL
MAX2108 toc02
GC VOLTAGE (V)
RF LEVEL (dBm)
GC SET FOR 10mVp-p
BASEBAND OUTPUT
f RFIN = 1750 MHz
0
2
4
6
8
10
900 1300 1100 1500 1700
INPUT IP3 vs. FREQUENCY
MAX2108 toc03
RF FREQUENCY (MHz)
IIP3 (dBm)
TWO-TONE FREQUENCY
SPACING EQUALS 2MHz