Datasheet
AD7264 Data Sheet
Rev. B | Page 12 of 28
–90
–88
–86
–84
–82
–78
–76
–74
–72
–80
–70
1 2 3 4 6 8 12 16 24 32 48 64 96 128
06732-018
GAIN
CMR (dB)
AV
CC
= 5V
V
DRIVE
= 5V
f
S
= 1MSPS
INTERNAL REFERENCE
f
RIPPLE
= 50kHz
Figure 17. Common-Mode Rejection vs. Gain
–80
–79
–78
–77
–76
–75
–74
–73
–72
–71
–70
0 20 40 60 80 100 120 140 160 180 200
06732-019
RIPPLE FREQUENCY (kHz)
CMR (dB)
AV
CC
= 5V
V
DRIVE
= 5V
f
S
= 1MSPS
V
RIPPLE
= 700mV p-p
GAIN = 2
INTERNAL REFERENCE
Figure 18. Common-Mode Rejection vs. Common-Mode Ripple Frequency
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7
G = 2
G = 3
G = 12
G = 24
G ≥ 32
G = 8
G = 16
06732-020
V
CM
RANGE (V)
THD (dB)
AV
CC
= 5V
V
DRIVE
= 5V
f
S
= 1MSPS
f
IN
= 100kHz
INTERNAL REFERENCE
G = 1
G = 4
G = 6
Figure 19. THD vs. Common-Mode Voltage Range for Various
PGA Gain Settings
06732-021
OVERDRIVE VOLTAGE (mV)
PROPAGATION DELAY (µs)
0
1
2
3
4
5
6
7
8
9
10
0 10 20 30 40 50 60 70 80 90 100
L TO H, C
A
_C
B
V
CC
= 4.5V
L TO H, C
A
_C
B
V
CC
= 5V
H TO L, C
A
_C
B
V
CC
= 3.6V
H TO L, C
A
_C
B
V
CC
= 4.5V
H TO L, C
A
_C
B
V
CC
= 5V
H TO L, C
A
_C
B
V
CC
= 2.7V
L TO H, C
A
_C
B
V
CC
= 3.6V
L TO H, C
A
_C
B
V
CC
= 2.7V
AV
CC
= 5V
V
DRIVE
= 3.3V
T
A
= 25°C
Figure 20. Propagation Delay for Comparator A and Comparator B
vs. Overdrive Voltage for Various Supply Voltages
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
06732-022
OVERDRIVE VOLTAGE (mV)
PROPAGATION DELAY (µs)
0 10 20 30 40 50 60 70 80 90 100
H TO L, C
C
_C
D
V
CC
= 4.5V
H TO L, C
C
_C
D
V
CC
= 5V
L TO H, C
C
_C
D
V
CC
= 3.6V
L TO H, C
C
_C
D
V
CC
= 4.5V
L TO H, C
C
_C
D
V
CC
= 5V
L TO H, C
C
_C
D
V
CC
= 2.7V
H TO L, C
C
_C
D
V
CC
= 3.6V
H TO L, C
C
_C
D
V
CC
= 2.7V
AV
CC
= 5V
V
DRIVE
= 3.3V
T
A
= 25°C
Figure 21. Propagation Delay for Comparator C and Comparator D
vs. Overdrive Voltage for Various Supply Voltages
06732-036
SUPPLY RIPPLE FREQUENCY (kHz)
PSRR (dB)
–120
–115
–110
–105
–100
–95
–90
–85
–80
–75
0 200 400 600 800 1000
–70
V
DRIVE
= 5V
GAIN = 2
T
A
= 25°C
INTERNAL REFERENCE
100mV p-p SINE WAVE ON AV
CC
AV
CC
DECOUPLED WITH
10µF AND 100nF CAPACITORS
Figure 22. Power Supply Rejection Ratio