參數(shù)資料
型號(hào)： HI1260JCQ
廠商： INTERSIL CORP
元件分類(lèi)： 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)： 12/13頁(yè)
文件大小： 166K
代理商： HI1260JCQ
10-12
Typical Application Circuit
Notes On Use
Setting of Pin 24 (V
SET
)
The full scale of the D/A output voltage changes by
applying voltage to pin 24 (V
SET
). When load is connected
to pin 25 (V
REF
), DC voltage of 1.2V is issued and the
said voltage is dropped to 0.87V by resistance division.
When the 0.87V is applied to pin 24 (V
SET
), the D/A
output of 1V
P-P
can be obtained.
Adjustment Method
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 19. The calculation expression is as
follows: R = V
REF
/I
REF
.
Adjust the volume so that the RGB output voltage full scale
becomes 1.0V. (At this point, it becomes R1:R2 = 2:5).
Phase Relationship Between Data and Clock
In order to obtain the desired characteristics as a D/A
converter, it is necessary to set the phase relationship
correctly between the externally applied data and clock.
Satisfy the standard of the setup time (t
S
) and hold time
(t
H
) indicated in the electrical characteristics. As to the
reaming of t
S
and t
H
, see the timing chart.
Moreover, the clock pulse width is desired to be as
indicated in the recommended operating condition.
Regarding the Load of D/A Output Pin
Receive the D/A output of the next stage with high
impedance. In other words, perform so that it becomes as
follows:
R
L
> 10k
C
L
< 20pF
The
temperature
characteristics
characteristics diagram has been measured under this
condition.
indicated
in
the
39 - 42
44 - 47
1 - 8
9 16
28, 30, 32
34, 35, 36
33
31
29
27
25
24
23
20
(R)
(G)
(B)
8
8
8
+
-
R
R
OUT
LPF
R
OUT
+
-
R
G
OUT
LPF
G
OUT
+
-
R
B
OUT
LPF
B
OUT
BW = 16MHz
+
-
33
μ
F
HI1260
18
CLK
CLK
(TTL LEVEL)
DATA
(TTL LEVEL)
AGND
DGND
DV
CC
AV
CC
R IS MATCHING RESISTANCE FOR LPF
FIGURE 17.
V
REF
V
SET
3K
19, 37, 43
V
REF
24
23
25
V
SET
R1
R2
R
AGND
FIGURE 18. EXAMPLE OF USE
0.1
0.2
1
5
PIN CURRENT I
REF
(mA)
0.1
0.3
R
)
1.0
5.0
FIGURE 19. RESISTANCE vs V
REF
PIN CURRENT
HI1260
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