Data Sheet
AD7656-1/AD7657-1/AD7658-1
95
90
85
80
75
70
65
60
120
110
100
90
fSAMPLE = 250kSPS
REF
INTERNAL REFERENCE
80
±2 × V
RANGE
AV /DV /V
CC CC DRIVE
= 5V
V
/V = ±12V
DD SS
T
= 25°C
T
= 25°C
fIAN = 10kHz
A
70
60
INTERNAL REFERENCE
1µF ON AV SUPPLY PIN
±2 × V RANGE
CC
REF
30kHz ON SELECTED CHANNEL
±100mV SUPPLY RIPPLE AMPLITUDE
30
70
110
150
190
230
0
20 40 60 80
100
120
140
SUPPLY RIPPLE FREQUENCY (kHz)
FREQUENCY OF INPUT NOISE (kHz)
Figure 22. Channel-to-Channel Isolation vs. Frequency of Input Noise
Figure 24. PSRR vs. Supply Ripple Frequency for AVCC Supply
22
±5V RANGE
±10V RANGE
20
18
16
14
12
10
AV /DV /V
= 5V
CC
CC DRIVE
= 250kSPS
f
SAMPLE
FOR ±5V RANGE V /V = ±12V
DD SS
FOR ±10V RANGE V /V = ±16.5V
DD SS
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Figure 23. Dynamic Current vs. Temperature
Rev. D | Page 17 of 32
ROCHESTER [ Rochester Electronics ]
