Datasheet

AD9786
Rev. B | Page 35 of 56
–8 –6 –4 –2 0 2 4 68
–150
–100
–50
0
NO INTERPOLATION
×2 INTERPOLATION
f
SIN
×4 INTERPOLATION
×8 INTERPOLATION
INTERP[1] = 0
INTERP[0] = 0
MOD[1] = 1
MOD[0] = 0
–8 –6 –4 –2 0 2
468
–150
–100
–50
f
SIN
INTERP[1] = 0
INTERP[0] = 1
MOD[1] = 1
MOD[0] = 0
–8 –6 –4 –2 0 2 4 6 8
–150
–100
 –50
f
SIN
INTERP[1] = 1
INTERP[0] = 0
MOD[1] = 1
MOD[0] = 0
–8 –6 –4 –2 0 2 4 6 8
–150
–100
–50
f
SIN
INTERP[1] = 1
INTERP[0] = 1
MOD[1] = 1
MOD[0] = 0
03215-061
0
0
0
Figure 61. Real Modulation by f
DAC
/4 Under All Interpolation Modes
–8
–6 –4 –2
0 2
4 6 8
–150
–100
–50
0
NO INTERPOLATION
×2 INTERPOLATION
f
SIN
f
SIN
×4 INTERPOLATION
f
SIN
×8 INTERPOLATION
f
SIN
INTERP[1] = 0
INTERP[0] = 0
MOD[1] = 1
MOD[0] = 0
INTERP[1] = 0
INTERP[0] = 1
MOD[1] = 1
MOD[0] = 0
INTERP[1] = 1
INTERP[0] = 0
MOD[1] = 1
MOD[0] = 0
INTERP[1] = 1
INTERP[0] = 1
MOD[1] = 1
MOD[0] = 0
–8 –6
–4 –2 0
246
8
–150
–100
–50
0
–8 –6
–4 –2 0
246
8
–150
–100
–50
0
8– –6
–4 –2
024
68
–150
–100
–50
0
03152-062
Figure 62. Real Modulation by f
DAC
/8 Under All Interpolation Modes