Shivaki STV-24LEDGR7, Руководство по обслуживанию

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1 UHF_IN
UHF RF Input Pin. Matched to 75H over the operating band. Requires a DC blocking
capacitor.
2 RFGND1
RF Ground. Bypass to the PC board’s ground plane with a 1000pF capacitor.
5 1 5B 1 5+ ) C
3 RFVGC RF VGA Gain Control Voltage. Accepts a DC voltage from 0.5V to 3V (max gain).
4 VCC_IF IF Supply. Requires a series ferrite bead.
5 RFGND2
RF Ground. Bypass to the PC board’s ground plane with a 1000pF capacitor.
5 1 5B 1 5+ ) C
6 IFOUT1A
In DTV SE mode, This pin is the signal out. In DTV Diff mode, this pin is the Plus terminal
of the Differential output.
7 IFOUT1B
In DTV SE mode, This pin is the BW switch pin. In DTV Diff mode, this pin is the Neg
terminal of the Differential output.
8 IFVGC IF VGA Gain Control Voltage. Accepts a DC voltage from 0.5V to 3V (maximum gain).
9 ADDR
2 Wire Serial Interface Address Line. This pin sets the device address for the I
2
C
compatible serial interface. There are three selectable addresses based on the state of
this pin being 1) logic low, 2) logic high, or 3) high Z load (eg, unconnected)
10, 11 IFIN Differential IF VGA Input. Connect to the IF SAW filter output
12 GNDVGA IFVGA Ground
13 VCCVGA IFVGA Supply
14 IFOUT2
Single ended IF Output. Connect to the analog demodulator input. Requires a DC blocking
capacitor.
15
DTVOUT ,
Differential IF VGA Output. Connect to the demodulator input. Requires DC blocking
capacitors.
17 GNDDIG Digital Ground
18 REFOUT Crystal Output for demodulator. Output frequency is XTAL/1 or /4
19 VCCDIG Digital supply.
20 SCL 2 Wire Serial Clock Interface. Requires a pullup resistor to V
CC
.
21 XTALB
Crystal Oscillator Base pin. Connect to crystal through a DC blocking cap and connect a
cap to XTALE
22 XTALE Crystal Oscillator Emitter pin. Connect cap to ground and cap to XTALB
23 REFDIV
Reference frequency divider control. High = /1, Low = /4, Float = read register C D
$ ' ( ! 3 ! ! E ) 3 & !) 7
! 3 ) ( + !! 3 ) ! C
24 SDA 2 Wire Serial Data Interface. Requires a pullup resistor to V
CC
.
25 VTUNE PLL Charge pump output and VTUNE input. Connect to the PLL loop filter
26 GND_TUNE VTUNE Ground Connection. Connect to the PC board ground plane.
27 VCC_VCO Supply for VCO
28 LDOBYP Bypass for VCO LDO
29 VCC_MIX Supply for Mixer
30 VHFL1 VHF Low Tracking filter pin 1
31 VHFL2 VHF Low Tracking filter pin 2
32 VHFH1 VHF High Tracking filter pin 1
33 VHFH2 VHF High Tracking filter pin 2
34 UHF3 UHF Tracking filter pin 1
35 UHF2A UHF Tracking filter pin 2A
36 UHF2B UHF Tracking filter pin2B
37 UHF3 UHF Tracking filter pin 3
38 LEXT
RF VGA Supply Voltage. Connect through a
470nH pullup inductor to V
CC
.
( ( ( 3 ) !
! !
& & ! 3
7 ! ! 7 ( !C
$ ! (7 ) :9 7
# 7 ) ! C
39 VCC_RF Supply for RF
40 VHF_IN
VHF RF Input. Matched to 75H over the operating band. Requires a DC blocking
capacitor.
EP GND Exposed Paddle. Solder evenly to the PC board ground plane for proper operation.
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