MAX2108 Maxim, MAX2108 Datasheet - Page 5

• Manufacturer Part Number: MAX2108
• Description: Direct-Conversion Tuner IC
• Manufacturer: Maxim

17, 20
PIN
8, 9
10
11
12
13
14
15
16
18
19
21
22
23
24
1
2
3
4
5
6
7
PS_SEL
PSOUT
PSOUT
NAME
QOUT
QOUT
IOUT
IOUT
GND
RFIN
RFIN
GND
GND
GND
GND
N.C.
V
V
V
V
GC
LO
LO
CC
CC
CC
CC
_______________________________________________________________________________________
Inverting I-Channel Baseband Output
Noninverting I-Channel Baseband Output
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
Direct-Conversion Tuner IC
FUNCTION
Pin Description
5