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LMH0303SQX/NOPB View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
LMH0303SQX/NOPB 3-Gbps HD/SD SDI Cable Driver With Cable Detect TI
Texas Instruments TI
LMH0303SQX/NOPB Datasheet PDF : 27 Pages
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8.2 Typical Application
Figure 5 shows the application circuit for the LMH0303.
VCC
VCC
LMH0303
SNLS285H – APRIL 2008 – REVISED MAY 2016
FAULT
RSTO
10 kΩ
75 Ω
49.9 Ω
Differential
Input
0.1 μF
VCC
49.9 Ω
1
SDI
2
SDI
3
VEE
4
RREF
LMH0303
SDO 12
11
SDO
10
SD/HD
9
VCC
75 Ω
0.1 μF
6.8 nH
75 Ω
4.7 μF Coaxial Cable
75 Ω
4.7 μF Coaxial Cable 75 Ω
6.8 nH
75 Ω
RSTI
750 Ω
ENABLE
SDA
SCL
VCC
VCC
10 kΩ
10 kΩ
0.1 μF
SD/HD
Copyright © 2016, Texas Instruments Incorporated
Figure 5. Application Circuit
8.2.1 Design Requirements
For the LMH0303 design example, Table 2 lists the design parameters.
Table 2. LMH0303 Design Parameters
Input termination
PARAMETER
Output AC-coupling capacitors
DC power supply coupling capacitors
Distance from device to BNC
High speed SDI and SDI trace impedance
High speed SDO and SDO trace impedance
REQUIREMENT
Required, 49.9 are recommended (see Figure 5).
Required. Both SDO and SDO require AC-coupling capacitors. SDO AC-
coupling capacitors are expected to be 4.7 µF to comply with SMPTE
wander requirement.
To minimize power supply noise, place 0.1-µF capacitor as close to the
device VCC pin as possible.
Keep this distance as short as possible.
Design differential trace impedance of SDI and SDI with 100 .
Single-ended trace impedance for SDO and SDO with 75 .
Copyright © 2008–2016, Texas Instruments Incorporated
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