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參數(shù)資料
| 型號(hào)： | HI1260JCQ |
| 廠商： | INTERSIL CORP |
| 元件分類： | DAC |
| 英文描述： | Triple 8-Bit, 35 MSPS, RGB, 3-Channel D/A Converter |
| 中文描述： | PARALLEL, 8 BITS INPUT LOADING, 0.0016 us SETTLING TIME, 8-BIT DAC, PQFP48 |
| 封裝： | PLASTIC, MQFP-48 |
| 文件頁(yè)數(shù)： | 13/13頁(yè) |
| 文件大小： | 166K |
| 代理商： | HI1260JCQ |
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However, when it is made to R
L
≤
10k
the temperature
characteristics may change considerably. In addition,
when it is made to C
L
≤
20pF, the rise and fall of the D/A
output become slow and will not operate at high speed.
Noise Reduction Measures
As the D/A output voltage is a minute voltage of
approximately 4mV per one step, ingenuity is required in
reducing the noise entering from the outside of the IC as
much as possible. Therefore, use the items given below as
reference.
When mounting onto the printed board, allow as much
space as possible to the ground surface and the V
CC
surface on the board and reduce the parasitic inductance
and resistance.
It is desirable that the AGND and DGND be separated in
the pattern on the board. It is similar with AV
CC
and
DV
CC
. As shown in the diagram below, for example, it is
recommended that the wiring to the electric supply of
AGND and DGND as also AV
CC
and DV
CC
be conducted
separately, and then making AGND and DGND as also
AV
CC
and DV
CC
in common right near the power supply
respectively.
Inset in parallel a 47
μ
F tantalum capacitor and a 100pF
ceramic capacitor between the V
CC
surface on the printed
board and the nearmost ground surface (A of diagram
below). It is also desirable to insert the above between the
V
CC
surface near the pin of the IC and the ground surface
(B of diagram below). They are bypass capacitors to pre-
vent bad effects from occurring to the characteristics when
the power supply voltage fluctuates due to the clock, etc.
It is recommended to reduce noise which overlaps the D/A
output by inserting a capacitor of over 0.1
μ
F between pin 23
(AGND) and pin 24 (V
SET
).
PRINTED BOARD
CXI260Q-Z
POWER SUPPLY
+
0
DGND
AGND
AV
CC
DV
CC
A
B
FIGURE 20.
HI1260
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