SM5301BS NPC [Nippon Precision Circuits Inc], SM5301BS Datasheet - Page 10

• Manufacturer Part Number: SM5301BS
• Description: 3-channel Video Buffer with Built-in Wideband Filters with Filter Through Function
• Manufacturer: NPC [Nippon Precision Circuits Inc]

Filter Through Mode
THROUGH pin sets the through mode. It functions only output buffer, and bypasses the LPF.
Frequency characteristics of through mode is shown as Figure 3 (VFC = 1.6V, RFC = 820Ω).
Analog Signal Input
Input Channel Selection
MUXSEL pin sets the analog input channel ×
Selected pins are connected to the internal synctip clamp circuit. Clamp voltage is 2.3V (typ).
BIAS Input
When input signal is color difference signal of component signal, BIAS input is suitable better than CLAMP
input. Connect the resistors as Figure 4, it functions BIAS input.
Low or Open
Low or Open
THROUGH
MUXSEL
High
High
− 20
− 40
− 60
20
0
Filter mode/Through mode
0.1
Analog input channel
Through mode
Figure 3. Through mode frequency characteristic
Filter mode
Figure 4. Resistor connection for BIAS input
×
×
INA
INB
220kΩ
330kΩ
INA
1
Gain = 6dB
Gain = 0dB
or ×
SM5301BS
Frequency [MHz]
INB
VCC
X
GND1
.
INA/B
10
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