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參數(shù)資料
| 型號： | SM5302A |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | 3-channel Video Buffer with Built-in wideband LPF |
| 中文描述： | 3通道視頻緩沖器，具有內(nèi)置的寬帶低通濾波器 |
| 文件頁數(shù)： | 19/26頁 |
| 文件大?。?/td> | 503K |
| 代理商： | SM5302A |
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SM5302A
NIPPON PRECISION CIRCUITS INC.—19
Filter Bypass Mode
In filter bypass mode, the lowpass filter is bypassed and the signal is input to the output buffer stage. The input
type, multiplexer function, and output gain are set just as for filter mode. The cutoff frequency setting and fc
mode setting have no effect on the outputs. In this mode, the passband frequency is 80MHz (typ), which can
support SXGA-class signals.
Input Multiplexer Switching (MUXSEL)
The input multiplexer setting can also be set using the MUXSEL input. When set using the I
2
C BUS, a certain
amount of communication time is required, but the setting can be made using the MUXSEL input with arbi-
trary timing for high-speed switching.
Power-ON Reset
When power is applied, an internal power-ON reset circuit operates initializing the internal register flags to
their default settings. At power-ON, all supplies should be applied simultaneously.
Sag Compensation Circuit
A sag compensation circuit is built-in between the OUTnA and OUTnB pins. In circuits where the load resis-
tance is small and the capacitance required is large, using the sag compensation circuit allows the total capaci-
tance and mounting area to be reduced. If the sag compensation circuit is not used, output OUTnA should be
connected to OUTnB. The electrical characteristics are not guaranteed if OUTnB is left open circuit.
Reference Voltage (REF)
The REFn pins (n
=
1, 2, 3) are internal reference voltage outputs. A 10
μ
F capacitor connected to ground is
recommended for stability. REF1, REF2, and REF3 are independent reference voltage outputs, and have no
correspondence with channels CH-1, CH-2, and CH-3. In disable mode, they are high impedance outputs.
MUXSEL pin
MUX flag
Multiplexer selection
*1
*1. n = 1, 2, 3
L
L
INnA
L
H
INnB
H
L
INnB
H
H
INnB
Figure 4. Connection without sag compensation
circuit
OUTnA
OUTnB
Figure 5. Connection with sag compensation circuit
OUTnA
OUTnB
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