AD7656-1/AD7657-1/AD7658-1
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
2.0
1.5
0
V
/V = ±12V
DD SS
T = –40°C
A
= 5V DNL WCP = 0.61LSB
V
/V = ±15V
DD SS
AV /DV /V
fSAMPLE = 250kSPS
2 × V
REF
AV /DV /V
= 5V
CC
CC DRIVE
CC
CC DRIVE
–20
DNL WCN = –0.82LSB
±10V RANGE
RANGE
INTERNAL REFERENCE
–40
T
= 25°C
1.0
fSAAMPLE = 250kSPS
fIN = 10kHz
–60
0.5
SNR = 88.44dB
SINAD = 88.43dB
THD = –111.66dB
–80
0
–100
–120
–140
–160
–180
–0.5
–1.0
–1.5
–2.0
0
10k
20k
30k
CODE
40k
50k
60k 65535
0
20
40
60
80
100
120
FREQUENCY (kHz)
Figure 4. AD7656-1 FFT for 5 V Range (VDD/VSS
=
15 V)
Figure 7. AD7656-1 Typical DNL
0
2.0
1.6
V
/V = ±12V
DD SS
V
/V = ±12V
DD SS
AV /DV /V
fSAMPLE = 250kSPS
±5V RANGE
= 5V
AV /DV /V
±5V RANGE
INTERNAL REFERENCE
= 5V
CC
CC DRIVE
CC
CC DRIVE
–20
–40
1.2
T
= 25°C
fSAAMPLE = 250kSPS
fIN = 10kHz
0.8
–60
SNR = 88.25dB
SINAD = 88.24dB
THD = –112.46dB
0.4
–80
0
–100
–120
–140
–160
–180
–0.4
–0.8
–1.2
–1.6
–2.0
0
2000 4000 6000 8000 10000 12000 14000 16000
CODE
0
20
40
60
80
100
120
FREQUENCY (kHz)
Figure 5. AD7656-1 FFT for 5 V Range (VDD/VSS
= 12 V)
Figure 8. AD7657-1 Typical INL
2.0
1.5
2.0
1.5
V
/V = ±12V
DD SS
T = –40°C
A
= 5V INL WCP = 0.97LSB
V
/V = ±12V
DD SS
AV /DV /V
fSAMPLE = 250kSPS
2 × V
REF
AV /DV /V
fSAMPLE = 250kSPS
±5V RANGE
= 5V
CC
CC DRIVE
CC
CC DRIVE
INL WCN = –0.72LSB
RANGE
1.0
1.0
0.5
0.5
0
0
–0.5
–1.0
–1.5
–2.0
–0.5
–1.0
–1.5
–2.0
0
2000 4000 6000 8000 10000 12000 14000 16000
CODE
0
10k
20k
30k
CODE
40k
50k
60k 65535
Figure 6. AD7656-1 Typical INL
Figure 9. AD7657-1 Typical DNL
Rev. D | Page 14 of 32
ROCHESTER [ Rochester Electronics ]
