CXD2043Q View Datasheet(PDF) - Sony Semiconductor
Part Name
Description
Manufacturer
CXD2043Q Datasheet PDF : 11 Pages
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Application Circuit for D/A Converter
CXD2043Q
0.1µ
32 YVDD
30 YVSS
CLOCK
5 MCK
DVDD
DVSS
0.1µ
40 CVDD
42 CVSS
AYO 31
Y OUTPUT
200 (R)
0.1µ
YVG 33
YVRF 34
1k
YIRF 35
VB 36
ACO 41
3.3k (R')
0.1µ
C OUTPUT
200 (R)
0.1µ
CVG 39
CVRF 38
1k
CIRF 37
3.3k (R')
• Method of Selecting Output Resistance
The CXD2043Q has a built-in current output-type D/A converter. To obtain the output voltages, connect
resistances to AYO and ACO pins.
The voltage and current specifications are:
Output full-scale voltage: VFS = 0.5 to 2.0V
Output full-scale current: IFS = 0 to 15mA
Calculate the output resistance using the relationship VFS = IFS × R. In addition, connect a resistance of 16
times the output resistance to the reference current pin (YIRF, CIRF). In the case where the value comes to
be impractical, use a value of resistance as close to the value calculated as possible.
Note that, at this time, VFS = VRF × 16R/R' (VRF: Pin voltage of YVRF and CVRF).
R is the resistance connected to AYO/ACO, and R' is the resistance connected to YIRF/CIRF. Power
consumption can be reduced by using higher resistance values, but then glitch energy and data settling time
increase contrastingly. Select optimum resistance values according to the system applications.
• VDD, VSS
Separate the analog and digital systems around the device to reduce noise effect. YVDD and CVDD are
respectively by-passed to YVSS and CVSS as close to each other as possible through ceramic capacitor of
approximately 0.1µF.
–9–
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