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參數(shù)資料
| 型號： | CXD2309Q |
| 廠商： | Sony Corporation |
| 英文描述： | 10-bit 50MSPS RGB 3-channel D/A Converter |
| 中文描述： | 10位50 MSPS的的RGB三通道D / A轉(zhuǎn)換 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大小： | 243K |
| 代理商： | CXD2309Q |
—9—
CXD2309Q
Notes on Operation
Selecting the Output Resistance
CXD2309Q is a current output type D/A converter. The output voltage can be obtained by connecting the
resistor R
OUT
to the current output pins RO, GO and BO.
Specifications:
Output full-scale voltage V
FS
= 1.8 to 2.0 [V]
Output full-scale current I
FS
= 9.0 to 10.0 [mA]
Calculate the output resistance from V
FS
= I
FS
×
R
OUT
. Connect a resistance sixteen times the output
resistance to the reference current output pin IREF. In some cases, as this value may not exist, a similar
value can be used instead.
Note that the V
FS
will be the following.
V
FS
= V
REF
×
16R
OUT
/R
IR
V
REF
is the voltage set at the reference voltage input pin VREF, R
OUT
is the resistor to be connected to the
current output pins RO, GO, BO and R
IR
is the resistor to be connected to the IREF. Power consumption can
be reduced by increasing the resistance, but this will on the contrary increase the glitch energy and data
setting time. Set the best values according to the purpose of use.
Correlation between Data and Clock
For CXD2309Q to display the desired performance as a D/A converter, the data transmitted from outside and
the clock must be synchronized properly. Adjust the setup time (ts) and hold time (th) as specified in
“Electrical Characteristics”.
Power supply, ground
Separate the analog and digital signals around the device to reduce noise effects. Bypass the power supply
pin to each ground with a 0.1 μF ceramics capacitor as near as possible to the pin for both the digital and
analog signals.
Latch up
Analog and digital power supplies must be able to share the same power supply of the board. This is to
prevent latch up caused by potential difference between the two pins when the power is turned on.
IREF
The I
REF
pin is very sensitive to improve the AC characteristics. Pay attention for capacitance component not
to attach to this pin because its output may become unstable.
VG pin
It is recommended to use a 1 μF capacitor to improve the AC characteristics though the typical capacitance
value externally connected to the VG pin is 0.1 μF.
Output full-scale voltage
For the applications using the RGB signal, the color balance may be broken up when the RO, GO and BO
output full-scale voltages are used with not adjustment.
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| CXD2312 | 制造商:SONY 制造商全稱:Sony Corporation 功能描述:9-bit 20MSPS Video A/D Converter |
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