AD9835
Table VII. Writing to the AD9835 Data Registers
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
C3 C2 C1 C0 A3 A2 A1 A0 MSB
LSB
Table VIII. Setting SYNC and SELSRC
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
1
0 SYNC SELSRC X
X
X
X
X
X
X
X
X
X
X
X
Table IX. Power-Down, Resetting and Clearing the AD9835
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
1
1 SLEEP RESET CLR X
X
X
X
X
X
X
X
X
X
X
Typical Performance Characteristics
0
AVDD = DVDD = +5V
–2
–4
CL = 82pF
–6
–8
–10
CL = 150pF
CL = 100pF
–12
0
2
4
6
8
10
12
14
16
OUTPUT FREQUENCY – MHz
Figure 5. Signal Attenuation vs. Output Frequency for
Various Capacitive Load (RL = 300 Ω)
30
25
TA = +25؇C
AVDD = DVDD = +5V
20
15
10
5
0
10
20
30
40
50
MCLK FREQUENCY – MHz
Figure 6. Typical Current Consumption vs. MCLK Frequency
–64
–66
fOUT/fMCLK = 1/3
AVDD = DVDD = +5V
–68
–70
–72
–74
–76
10
20
30
40
50
MCLK FREQUENCY – MHz
Figure 7. Narrow Band SFDR vs. MCLK Frequency
0
–10
fOUT/fMCLK = 1/3
AVDD = DVDD = +5V
–20
–30
–40
–50
–60
10
20
30
40
50
MCLK FREQUENCY – MHz
Figure 8. Wide Band SFDR vs. MCLK Frequency
REV. 0
–7–