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參數(shù)資料
| 型號： | HI20206JCP |
| 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, 0.016 us SETTLING TIME, 8-BIT DAC, PDIP42 |
| 封裝： | PLASTIC, DIP-42 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大小： | 171K |
| 代理商： | HI20206JCP |
10-10
Notes On Use
(1)
Setting of pin 26 (V
SET
)
The full scale of the D/A output voltage changes by apply-
ing voltage to pin 26 (V
SET
). When load is connected to
pin 27 (V
REF
), DC voltage of 1.2V is issued and the said
voltage is dropped to 0.8V by resistance division.
When the 0.8V is applied to pin 26 (V
SET
), the D/A
output of 1V
P-P
can be obtained.
(Example of use):
(Adjustment Method)
1.The resistance R is determined in accordance with
the recommended operating condition of I
REF
,
(current flowing through resistance R).
See R vs I
REF
of Figure 14. The calculation
expression is as follows:
R = V
REF
/I
REF
.
2.Adjust the volume so that the RGB output voltage
full scale becomes 1V.
(At this point, it becomes R1: R2 = 1:2).
Timing Diagram
NOTE: At the time t = t
X
, the data of individual bits are switched and
thereafter, when the CLK becomes L
→
H at t = t
2
, the D/A OUT is
varied synchronous with it. That is, the D/A OUT is synchronous with
the rise of the CLK. [In this case, fetching of the data is carried out at
the fall of the CLK (at the time when t = t
12
)].
NOTE: At the time t = t
Y
, the data of individual bits are switched and
thereafter when the CLK becomes L
→
H at t = t
4
, the D/A OUT is
varied synchronous with it. That is, the D/A OUT is synchronous with
the rise of the CLK. [In this case, fetching of the data is carried out at
the fall of the CLK (at the time when t = t
4
)].
FIGURE 8. TIMING CHART
0%
10%
90%
100%
0%
10%
90%
100%
V
TH
: THRESHOLD LEVEL
t
H
t
S
V
TH
= 1.4V
V
TH
= 1.5V
t
3
t
34
t
4
t
Y
t
X
t
1
t
12
t
2
t
PW1
t
PW0
t
H
t
S
t
r
t
f
CLK
DATA
D/A OUT
27
26
25
V
REF
V
SET
R2
AGND
R
R1
FIGURE 9.
R
)
5.0
1.0
0.3
0.1
0.1
0.2
1
5
PIN CURRENT I
REF
(mA)
FIGURE 10. RESISTANCE vs V
REF
PIN CURRENT
HI20206
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