Datasheet

Data Sheet AD7264
Rev. B | Page 11 of 28
06732-011
CODE
NUMBER OF HITS
0
1000
2000
3000
4000
5000
6000
7000
8000
8189 8190 8191 8192 8193 8194
1117
6
0
7793
1084
0
Figure 11. Histogram of Codes for 10k Samples at Gain of 2
06732-012
CODE
NUMBER OF HITS
0
500
1000
1500
2000
2500
3000
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
2486
2180
1222
498
132
22
2
1081
381
82
16
1861
Figure 12. Histogram of Codes for 10k Samples at Gain of 32
06732-014
ANALOG INPUT FREQUENCY (kHz)
THD (dB)
–90
–85
–80
–75
–70
–65
10 110 210 310 410 510 610 710 810 910
AV
CC
= 5V
V
DRIVE
= 5V
f
S
= 1MSPS
INTERNAL REFERENCE
GAIN = 2
GAIN = 32
Figure 13. THD vs. Analog Input Frequency up to 1 MHz at Gain of 2 and 32
2.4961
2.4962
2.4963
2.4964
2.4965
2.4966
2.4967
2.4968
0 20 40 60 80 100 120 140 160 180 200
AV
CC
= 5V
V
DRIVE
= 3V
f
S
= 1MSPS
INTERNAL REFERENCE
06732-015
CURRENT LOAD (µA)
V
REF
(V)
Figure 14. V
REF
vs. Reference Output Current Drive
600
1900
1800
06732-016
GAIN
3dB BANDWIDTH (kHz)
1
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
2 3 4 6 8 12 16 24 32 48 64 96 128
AV
CC
= 5V
V
DRIVE
= 5V
f
S
= 1MSPS
INTERNAL REFERENCE
Figure 15. 3 dB Bandwidth vs. Gain
30
35
40
45
50
55
60
65
70
75
80
1 2 3 4 6 8 12 16 24 32 48 64 96 128
06732-017
PGA GAIN
SNR (dB)
AV
CC
= 5V
V
DRIVE
= 5V
f
S
= 1MSPS
INTERNAL REFERENCE
f
IN
= 100kHz
Figure 16. SNR vs. PGA Gain for an Analog Input Tone of 100 kHz