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ISDB-T 1-Segment Tuner
Pin Description
PIN
1
2
3
4, 8, 9, 10
5
6
7
11
12
13
14
15
16
17
18
NAME
STBY
SHDN
LEXTU
N.C.
V CCLNA
V CCRF
UHFIN
GC1
V CCIF
GC2
V CCBIAS
IFOUT
PWRDET
SCL
SDA
DESCRIPTION
Device Standby. Connect to logic-high to place the device in standby mode. Connect to logic-low for
normal operation. This pin is logically ORed to the STBY bit.
Device Shutdown. Connect to logic-low to place the device in shutdown mode.
Optional UHF Tracking Filter Inductor. Connect an 18nH inductor from this pin to ground.
No Connection. Connect to the PCB ground plane.
DC Power Supply for LNA. Connect to a +2.5V low-noise supply. Bypass to GND with a 0.1μF capacitor
placed as close as possible to the pin. Do not share capacitor ground vias with other ground
connections.
DC Power Supply for RF Circuits. Connect to a +2.5V low-noise supply. Bypass to GND with a 0.1μF
capacitor placed as close as possible to the pin. Do not share capacitor ground vias with other ground
connections.
UHF 50 ? RF Input. Incorporates an internal DC-blocking capacitor.
RF Gain Control Input. In closed-loop RFAGC mode (PDBM[1:0] = 11), connecting a capacitor from
GC1 to ground sets the AGC response time. In open-loop RFAGC mode (PDBM[1:0] = 10), GC1 is a
high-impedance analog input that controls the RFAGC.
DC Power Supply for IF Circuits. Connect to a +2.5V low-noise supply. Bypass to GND with a 0.1μF
capacitor placed as close as possible to the pin. Do not share capacitor ground vias with other ground
connections.
IF Gain Control Input. High-impedance analog input.
DC Power Supply for Bias Circuits. Connect to a +2.5V low-noise supply. Bypass to GND with a 0.1μF
capacitor placed as close as possible to the pin. Do not share capacitor ground vias with other ground
connections.
Low-IF Output. Requires a DC-blocking capacitor.
Low-Impedance Power Detector Output Buffer. Bits PDBM[1:0] control the function of this output pin.
See Table 6.
2-Wire Serial-Clock Interface. Requires a pullup resistor to V CCDIG .
2-Wire Serial-Data Interface. Requires a pullup resistor to V CCDIG .
8
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