MAX2120CTI 데이터 시트보기 (PDF) - Maxim Integrated
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MAX2120CTI Datasheet PDF : 21 Pages
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Complete, Direct-Conversion Tuner for DVB-S
and Free-to-Air Applications
Pin Description (continued)
PIN
NAME
FUNCTION
DC Power Supply for Synthesizer Circuits. Connect to a +3.3V low-noise supply. Bypass to GND with
13
VCC_SYN a 1nF capacitor connected as close as possible to the pin. Do not share capacitor ground vias with
other ground connections.
14
XTAL
Crystal-Oscillator Interface. Use with an external parallel-resonance-mode crystal by a series 1nF
capacitor. See the Typical Operating Circuit.
15
REFOUT
Crystal-Oscillator Buffer Output. A DC-blocking capacitor must be used when driving external
circuitry.
DC Power Supply for Digital Logic Circuits. Connect to a +3.3V low-noise supply. Bypass to GND
16
VCC_DIG with a 1nF capacitor connected as close to the pin as possible. Do not share capacitor ground vias
with other ground connections.
17
QOUT+
Quadrature Baseband Differential Output. AC-couple with a 47nF capacitor to the demodulator input.
18
QOUT-
19
IOUT+
In-Phase Baseband Differential Output. AC-couple with a 47nF capacitor to the demodulator input.
20
IOUT-
21
IDC+
I-Channel baseband DC Offset Correction. Connect a 47nF ceramic chip capacitor from IDC- to
22
IDC-
IDC+.
23
QDC+ Q-Channel Baseband DC Offset Correction. Connect a 47nF ceramic chip capacitor from QDC- to
24
QDC- QDC+.
DC Power Supply for Baseband Circuits. Connect to a +3.3V low-noise supply. Bypass to GND with a
25
VCC_BB 1nF capacitor connected as close as possible to the pin. Do not share capacitor ground vias with
other ground connections.
26
SDA
2-Wire Serial Data Interface. Requires a > 1kΩ pullup resistor to VCC.
27
SCL
2-Wire Serial Clock Interface. Requires a > 1kΩ pullup resistor to VCC.
28
ADDR Address. ADDR is at logic-high if unconnected.
—
EP
Exposed Paddle. Solder evenly to the board’s ground plane for proper operation.
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