
AD5680
Rev. 0 | Page 9 of 20
SAMPLE NUMBER
A
2.502500
2.502250
2.502000
2.501750
2.501500
2.501250
2.501000
2.500750
2.500500
2.500250
2.500000
2.499750
2.499500
2.499250
2.499000
2.498750
0
150
200
250
50
100
300
350
400
450
500 550
0
V
DD
= V
REF
= 5V
T
= 25
°
13nS/SAMPLE NUMBER
1 LSB CHANGE AROUND
MIDSCALE (0x20000 TO 0x1FFFF)
GLITCH IMPULSE = 2.723nV.s
Figure 16. Digital-to-Analog Glitch Impulse (Negative)
SAMPLES × 6.5ns
A
2.5010
2.4986
0
0
2.4988
2.4990
2.4992
2.4994
2.4996
2.4998
2.5000
2.5002
2.5004
2.5006
2.5008
50
100
150
200
250
300
350
400
450
500
V
DD
= V
REF
= 5V
T
= 25°C
DAC LOADED WITH MIDSCALED
DIGITAL
FEEDTHROUGH = 0.201nV
Figure 17. Digital Feedthrough
FREQUENCY (kHz)
(
–20
–100
0
10
0
–30
–40
–50
–60
–70
–80
–90
1
2
3
4
5
6
7
8
9
V
DD
= 5V
T
= 25°C
FULLSCALE LOADED
V
REF
= 2V ±300mV p-p
0
Figure 18. Total Harmonic Distortion
CAPACITANCE (nF)
T
16
14
12
10
8
6
4
0
1
2
3
4
5
6
7
9
8
1
0
V
REF
= V
DD
T
A
= 25
°
C
V
DD=
5V
V
DD=
3V
Figure 19. Settling Time vs. Capacitive Load
0
5s/DIV
5
1
V
DD
= V
REF
= 5V
T
= 25°C
DAC LOADED WITH MIDSCALE
V
REF
Figure 20. 0.1 Hz to 10 Hz Output Noise Plot
FREQUENCY (Hz)
N
√
H
1000
0
100
1M
0
1k
10k
100k
V
DD
= V
REF
= 5V
T
= 25°C
MIDSCALE LOADED
900
800
700
600
500
400
300
200
100
Figure 21. Noise Spectral Density