參數(shù)資料
型號(hào): HMP8156ACNZ
廠商: INTERSIL CORP
元件分類: 顏色信號(hào)轉(zhuǎn)換
英文描述: NTSC/PAL Encoders
中文描述: COLOR SIGNAL ENCODER, PQFP64
封裝: 14 X 14 MM, ROHS COMPLIANT, PLASTIC, MS-022BE, MQFP-64
文件頁數(shù): 32/34頁
文件大?。?/td> 559K
代理商: HMP8156ACNZ
32
4343.4
November 4, 2005
For proper operation, power supply decoupling is required. It
should be done using a 0.1
μ
F ceramic capacitor in parallel
with a 0.01
μ
F chip capacitor for each group of V
AA
pins to
ground. These capacitors should be located as close to the
V
AA
and GND pins as possible, using short, wide traces.
If a separate linear regulator is used to provide power to the
HMP8154/HMP8156A power plane, the power-up sequence
should be designed to ensure latchup will not occur. A separate
linear regulator is recommended if the power supply noise on
the V
AA
pins exceeds 200mV. About 10% of the noise (that is
less than 1MHz) on the V
AA
pins will couple onto the analog
outputs.
External Reference Voltage
If an external reference voltage is used, its circuitry should
receive power from the same plane as the HMP8154/
HMP8156A. The external VREF must also be stable and well
decoupled from the power plane. An example VREF circuit
using a band gap reference diode is shown in Figure 37.
FIGURE 36A. V
CC
AND V
AA
PLANES
FIGURE 36B. COMMON GROUND PLANE
FIGURE 36. EXAMPLE POWER AND GROUND PLANES
LP
VCC
VAA
FERRITE
BEAD
BULK AREA
CAPACITOR
8154/8156A
PCB
ANALOG
CONN.
FILTERS
LP
GND
8154/8156A
PCB
ANALOG
CONN.
FILTERS
HMP8154, HMP8156A
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