GS2972 Datasheet, PDF (120/125 Pages) Semtech Corporation – 3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support

5. Application Reference Design
5.1 Typical Application Circuit
Power Filtering
+3.3V
0Ω
10nF 1µF
CD_VDD +1.2V
+1.2V_A
0Ω
1µF
10nF
10nF
1µF
0Ω
1µF
10nF
0Ω
10nF 1µF
GND_A
+3.3V_A
1µF
10nF
IO_VDD
GND_A
1µF
Power Decoupling
+1.2V
10nF 10nF 10nF 10nF
IO_VDD
10nF
10nF
GND_A
+1.2V_A
+1.2V_A CD_VDD
105Ω
10µF
10nF
10nF
GND_A
GND_A
GND_A
+3.3V_A
Place close to GS2972
10nF
GND_A
Close to
GS2972.
+1.2V
IO_VDD
Close to GS2972.
10µF
GND_A
F/DE
V/VSYNC
H/HSYNC
PCLK
DIN[19:0]
AUDIO_INT
GRP1_EN/DIS
ACLK1
WCLK1
AIN_1/2
AIN_3/4
GRP2_EN/DIS
ACLK2
WCLK2
AIN_5/6
AIN_7/8
100pF
200Ω
1µF
PCLK
DNP DNP
A7
LF
A8
VBG
A3 _F/DE
C4 _V/VSYNC
A4 _H/HSYNC
B4 _PCLK
B3
A2
A1
B2
B1
C2
C1
C3
D1
D2
F1
F2
H1
H2
J1
J2
K1
K2
J3
K3
DIN 19
DIN 18
DIN 17
DIN 16
DIN 15
DIN 14
DIN 13
DIN 12
DIN 11
DIN 10
DIN 9
DIN 8
DIN 7
DIN 6
DIN 5
DIN 4
DIN 3
DIN 2
DIN 1
DIN 0
STANDBY
D3
G3
G6
TIM_861 _G5
SMPTE_BYPASS
DVB_ASI
RATE_SEL0
E3
E4
RATE_SEL1 G7
IOPROC_EN/DIS G4
20bit/10bit D4
SDO_EN/DIS F3
DETECT_TRS _H3
ANC_BLANK
GS2972-IBE3
RSV ^D5
RSV ^F7
RSV ^F4
RSV ^D6
RSV ^D7
RSV ^D8
RSV ^A9
TCK ^J8
TDO ^F8
TMS ^E8
TDI ^E7
H7 _{AUDIO_INT}
H6 _{GRP1_EN/DIS}
K7 _ACLK1
J7 _WCLK1
J6 _{Ain_1/2}
K6 _{Ain_3/4}
H5 _{GRP2_EN/DIS}
K5 _ACLK2
J5 _WCLK2
J4 _{Ain_5/6}
K4 _{Ain_7/8}
RSET ^F10
750Ω
SDO ^C10
SDO
SDO ^{D10 SDO}
CS_TMS
SCLK_TCK
SDIN_TDI
SDOUT_TDO
JTAG/HOST
K9
J10
K10
J9
H8
RESET ^G8
LOCKED ^H4
STANDBY
TIM_861
SMPTE_BYPASS
DVB_ASI
RATE_SEL0
RATE_SEL1
IOPROC_EN/DIS
20BIT/10BIT
SDO_EN/DIS
DETECT_TRS
ANC_BLANK
TCK
TDO
TMS
TDI
Return Loss Compensation Network
CD_VDD
5.6nH
75Ω
75Ω
4.7µF
CD_VDD
10nF
75Ω
GND_A
75Ω
4.7µF
5.6nH
(SUBJECT TO CHANGE)
CS_TMS
SCLK_TCK
SDIN_TDI
SDOUT_TDO
JTAG/HOST
RESET
LOCKED
1
SDO
GND_A
1
SDO
GND_A
GND_A
Notes:
1. DNP (Do Not Populate).
2. The value of the series resistors on video data, clock, and timing
connections should be determined by board signal integrity test (See Section 4.1.1).
3. For analog power and ground isolation refer to PCB layout guide.
4. For critital 3G signal layout refer to PCB layout guide.
5. For impedance controlled signals refer to PCB layout guide.
Figure 5-1: Typical Application Circuit
GS2972 3G/HD/SD-SDI Serializer with Complete
SMPTE Audio & Video Support
Final Data Sheet Rev. 9
GENDOC-047479 September 2013
www.semtech.com
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