SM5301BS Datasheet, PDF (10/15 Pages) Nippon Precision Circuits Inc – 3-channel Video Buffer with Built-in Wideband Filters with Filter Through Function

SM5301BS
Filter Through Mode
THROUGH pin sets the through mode. It functions only output buffer, and bypasses the LPF.
THROUGH
Low or Open
High
Filter mode/Through mode
Filter mode
Through mode
Frequency characteristics of through mode is shown as Figure 3 (VFC = 1.6V, RFC = 820Ω).
20
Gain = 6dB
0
Gain = 0dB
− 20
− 40
− 60
0.1
1
10
100
Frequency [MHz]
Analog Signal Input
Figure 3. Through mode frequency characteristic
Input Channel Selection
MUXSEL pin sets the analog input channel ×_INA or ×_INB.
MUXSEL
Low or Open
High
Analog input channel
×_INA
×_INB
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.
220kΩ
330kΩ
VCC
XINA/B
GND1
Figure 4. Resistor connection for BIAS input
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