REV. 0
ADuC831
–13–
FREQUENCY – kHz
010
dBs
20
40
50
60
–160
30
70
–140
–120
–100
–80
–60
–40
–20
0
20
AVDD / DVDD = 5V
fS = 152kHz
fIN = 9.910kHz
SNR = 71.3dB
THD = –88.0dB
ENOB = 11.6
TPC 11. Dynamic Performance at VDD = 5 V
FREQUENCY – kHz
010
dBs
20
40
50
60
–160
30
70
–140
–120
–100
–80
–60
–40
–20
0
20
AVDD / DVDD = 3V
fS = 149.79kHz
fIN = 9.910kHz
SNR = 71.0dB
THD = –83.0dB
ENOB = 11.5
TPC 12. Dynamic Performance at VDD = 3 V
EXTERNAL REFERENCE – V
50
0.5
SNR
–
dBs
1.0
2.0
2.5
5.0
55
1.5
60
65
70
75
80
THD
–
dBs
–100
–95
–90
–85
–80
–75
–70
AVDD / DVDD = 5V
fS = 152kHz
SNR
THD
TPC 13. Typical Dynamic Performance vs. VREF, VDD = 5 V
EXTERNAL REFERENCE – V
SNR
–
dBs
80
75
65
50
70
55
AV DD/DVDD = 3V
f
S = 152kHz
0.5
1.5
2.5
THD
–
dBs
SNR
THD
60
–70
–75
–85
–100
–80
–95
–90
1.0
2.0
3.0
TPC 14. Typical Dynamic Performance vs. VREF, VDD = 3 V
FREQUENCY – kHz
64
92.262
SNR
–
dBs
119.05
172.62
199.41
226.19
66
145.83
68
70
72
76
80
AVDD / DVDD = 5V
78
74
62
60
65.476
TPC 15. Typical Dynamic Performance vs.
Sampling Frequency
TEMPERATURE – C
0.40
–40
VOLTAGE
–
V
–20
0.45
0.50
0.55
0.60
0.70
0.80
0.75
0.65
AVDD / DVDD = 3V
SLOPE =
2mV/ C
0
25
50
85
TPC 16. Typical Temperature Sensor Output vs.
Temperature