Datasheet

AD7304/AD7305
Rev. C | Page 12 of 20
FREQUENCY (Hz)
1
0.1
0.001
20 100k100
THD (%)
1k 10k
0.01
V
DD
= +5V
V
SS
= –5V
01114-022
Figure 22. THD vs. Frequency
3.0
2.4
0
1 100k10
NOISE DENSITY (
µ
V/ Hz)
100 1k 10k
1.8
1.2
0.6
V
DD
= +5V
V
SS
= –5V
V
REF
= +4V
DATA = 0xFF
FREQUENCY (Hz)
01114-023
Figure 23. Output Noise Voltage Density vs. Frequency
50ns/DIV
CLK
V
DD
= +5V
V
SS
= –5V
V
REF
= +2.5V
DAC A = 0xFF
DAC B = 0x00
F = 2MHz
V
OUT
B
01114-024
50ns/DIV
Figure 24. Digital Feedthrough
CS
V
DD
= +5V
V
SS
= –5V
V
REF
= +2.5V
F = 1MHz
DATA = 0x80 0x7F
V
OUT
01114-025
Figure 25. Midscale Transition Glitch
FREQUENCY (Hz)
40
20
–160
100 10M1k
CROSS TALK (dB)
10k 1M
0
–20
–40
V
DD
= +5V
V
SS
= –5V
V
REF
= 50mV rms
DAC A DATA = 0xFF
DAC B, DAC C, DAC D DATA = 0x00
–60
–80
–100
–120
–140
V
OUT
B
V
REF
CT = 20 LOG
100k
01114-026
Figure 26. Crosstalk vs. Frequency
FREQUENCY (Hz)
60
0
10 100
PSRR (dB)
1k 100k
50
40
30
20
10
10k
DATA = 0x80
T
A
= +25°C
+PSRR, V
DD
= +5V ±∆10%
–PSRR, V
SS
= –5V ±∆10%
+PSRR, V
DD
= +3V ±∆10%
–PSRR, V
SS
= –3V ±∆10%
01114-027
Figure 27. Power-Supply Rejection vs. Frequency