DAC16 데이터 시트보기 (PDF) - Analog Devices
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DAC16 Datasheet PDF : 12 Pages
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Typical Performance Characteristics–DAC16
Digital Input Considerations
The threshold of the DAC16’s digital input circuitry is set at
1.4 V, independent of supply voltage. Hence, the digital inputs
can interface with any type of 5 V logic. Illustrated in Figure 5 is
the equivalent circuit of the digital inputs. Note that the indi-
vidual input capacitance is approximately 7 pF.
+5V
+0.7V
DBX
Q1
R2
75k⍀
Q2
R1
20k⍀
Q3
R3
28k⍀
TO DAC
SWITCH
–15V
–0.7V
Figure 5. Equivalent Circuit of a DAC16 Digital Input
This input capacitance can be used in conjunction with an ex-
ternal R-C circuit for digital signal deskewing, if required. In
applications where some of the DAC16’s digital inputs are
not used, the recommended procedure to turn off one or more
inputs is to connect each input line to +5 V as shown in
Figure 6.
+5V
DAC16
DB0
DB1
Figure 6. Handling Unused DAC16 Digital Inputs
4
VCC = +5V
3
VEE = –15V
TA = +25؇C
2
1
+INL
0
–1
–INL
–2
–3
–4
0.2
0.3
0.4
0.5
0.6
0.7
REFERENCE CURRENT – mA
Figure 7. Integral Nonlinearity vs. IREF
2.0
VCC = +5V
1.5
VEE = –15V
TA = +25؇C
1.0
0.5
+DNL
0
–0.5
–DNL
–1.0
–1.5
–2.0
0.2
0.3
0.4
0.5
0.6
0.7
REFERENCE CURRENT – mA
Figure 8. Differential Nonlinearity
vs. IREF
1.0
VCC = +5V
0.8
VEE = –15V
IREF = 0.5mA
0.6
0.4
0.2
0
–40 –20 0 20 40 60 80
TEMPERATURE – ؇C
Figure 9. Zero Scale Output vs.
Temperature
15
VCC = +5V
10
VEE = –15V
IREF = 0.5mA
5
0
–5
–10
–15
–40 –20 0 20 40 60 80
TEMPERATURE – ؇C
Figure 10. Gain Error vs.
Temperature
4
+INL
2
–INL
0
–2
VCC = +5V
VEE = –15V
IREF = 0.5mA
–4
–40 –20 0 20 40 60 80
TEMPERATURE – ؇C
Figure 11. Integral Nonlinearity
vs. Temperature
1.5
VCC = +5V
1.0
VEE = –15V
IREF = 0.5mA
0.5
+DNL
0
–0.5
–DNL
–1.0
–1.5
–40 –20 0 20 40 60 80
TEMPERATURE – ؇C
Figure 12. Differential Nonlinearity
vs. Temperature
REV. B
–5–
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