MAX2108CEG(1999) Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX2108CEG Datasheet PDF : 12 Pages
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Direct-Conversion Tuner IC
Pin Description
PIN NAME
1
IOUT
2
IOUT
3
VCC
4
GND
5
VCC
6
RFIN
7
RFIN
8, 9
GND
10
GC
11 PS_SEL
12
13
14
15
16
17, 20
18
19
21
22
23
24
VCC
PSOUT
PSOUT
GND
GND
N.C.
LO
LO
VCC
GND
QOUT
QOUT
Inverting I-Channel Baseband Output
Noninverting I-Channel Baseband Output
FUNCTION
Downconverter +5V Supply. Bypass with a 10pF capacitor to GND as close to the IC as possible. Connect
an additional 0.1µF capacitor in parallel with the 10pF capacitor.
Ground. Connect to a low-inductance ground plane.
RF +5V Supply. Bypass with a 22pF capacitor to GND as close to the IC as possible.
Inverting RF Input. Connect to a 22pF capacitor in series with a 75Ω resistor to GND.
Noninverting RF Input. Connect via matching network to a 75Ω cable.
RF Ground. Connect to a low-inductance ground plane.
Gain-Control Input. Apply a voltage between 1V and 4V to control the gain of the RF amplifier. Bypass with a
1000pF capacitor to minimize noise on the control line.
Prescaler Modulus Control. Drive PS_SEL <0.5V to operate in divide-by-33 mode. Drive PS_SEL >2.4V to
operate in divide-by-32 mode.
Prescaler +5V Supply. Bypass with a 1000pF capacitor to GND.
Inverting Prescaler Output
Noninverting Prescaler Output
Prescaler Ground. Connect to a low-inductance ground plane.
Local Oscillator Ground. Connect to a low-inductance ground plane.
No Connection. Do not make any connection to this pin.
Inverting LO Input
Noninverting LO Input
Local Oscillator +5V Supply. Bypass with a 22pF capacitor and a 0.1µF capacitor to pin 16.
Downconverter Ground. Connect to a low-inductance ground plane.
Noninverting Q-Channel Baseband Output
Inverting Q-Channel Baseband Output
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