Datasheet

AD9838
Rev. A | Page 10 of 32
1.178
1.176
1.174
1.172
1.170
1.168
1.166
1.180
1.164
–40 –20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
V
REF
(V)
09077-038
VDD = 2.7V
VDD = 5.0V
Figure 12. V
REF
vs. Temperature
0.20
0
–40 –20 0 20 40 60 80 100
09077-045
TEMPERATURE (°C)
DVDD (V)
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
DVDD = 3.3V
DVDD = 5.5V
DVDD = 2.3V
Figure 13. SIGN BIT OUT Pin, Low Level, I
SINK
= 1 mA
5.5
1.5
–40 –20 0 20 40 60 80 100
09077-046
TEMPERATURE (°C)
DVDD (V)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
DVDD = 2.3V
DVDD = 2.7V
DVDD = 3.3V
DVDD = 4.5V
DVDD = 5.5V
Figure 14. SIGN BIT OUT Pin, High Level, I
SINK
= 1 mA
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0 102030405060708090100
FREQUENCY (kHz)
POWER (dB)
09077-047
Figure 15. Power vs. Frequency, f
MCLK
= 16 MHz, f
OUT
= 3.8 kHz,
Frequency Word = 0x000FBA9
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0 102030405060708090100
FREQUENCY (kHz)
POWER (dB)
09077-048
Figure 16. Power vs. Frequency, f
MCLK
= 5 MHz, f
OUT
= 1.2 kHz,
Frequency Word = 0x000FBA9
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0 0.51.01.52.02.
FREQUENCY (MHz)
POWER (dB)
09077-049
5
Figure 17. Power vs. Frequency, f
MCLK
= 5 MHz, f
OUT
= 0.714 MHz = f
MCLK
/7,
Frequency Word = 0x2492492