Datasheet

Data Sheet AD7292
Rev. 0 | Page 11 of 40
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
–40 –20 0 20 40 60 80 100 120
INL ERROR (LSB)
TEMPERATURE (°C)
AV
DD
= 5V
DV
DD
= 3V
V
DRIVE
= 3V
f
SAMPLE
= 225kSPS
INTERNAL REFERENCE
SINGLE-ENDED MODE
0V TO V
REF
, –INL
0V TO V
REF
, +INL
0V TO 2 × V
REF
, –INL
0V TO 2 × V
REF
, +INL
0V TO 4 × V
REF
, –INL
0V TO 4 × V
REF
, +INL
(AV
DD
– 4 × V
REF
) TO AV
DD
, –INL
(AV
DD
– 4 × V
REF
) TO AV
DD
, +INL
10660-010
Figure 10. ADC INL vs. Temperature
–3
–2
–1
0
1
2
3
–40 –20 0 20 40 60 80 100 120
OFFSET ERROR (LSB)
TEMPERATURE (°C)
0V TO 4 × V
REF
0V TO V
REF
0V TO 2 × V
REF
(AV
DD
– 4 × V
REF
) TO AV
DD
AV
DD
= 5.25V
DV
DD
= 5V
V
DRIVE
= 3.3V
f
SAMPLE
= 200kSPS
INTERNAL REFERENCE
10660-012
Figure 11. Offset Error vs. Temperature, Single-Ended
and Differential Modes
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
10
100
90 80 70 60 50 40 30 20
THD (dB)
INPUT FREQUENCY (kHz)
AV
DD
= 5V
DV
DD
= 3V
V
DRIVE
= 3V
f
SAMPLE
= 225kSPS
T
A
= 25°C
INTERNAL REFERENCE
AV
DD
– 4 × V
REF,
0Ω
AV
DD
– 4 × V
REF,
220Ω
AV
DD
– 4 × V
REF,
510Ω
0V TO 4 × V
REF,
0Ω
0V TO 4 × V
REF,
220Ω
0V TO 4 × V
REF,
430Ω
0V TO 4 × V
REF,
510Ω
0V TO V
REF,
0Ω
0V TO V
REF,
220Ω
0V TO V
REF,
510Ω
0V TO 2 × V
REF,
0Ω
0V TO 2 × V
REF,
220Ω
0V TO 2 × V
REF,
510Ω
10660-014
Figure 12. THD vs. Input Frequency for Various Source Impedances,
Single-Ended Mode
–0.4
–0.3
–0.2
–0.1
0
0.1
0.2
0.3
0.4
–40 –20 0 20 40 60 80 100 120
DNL ERROR (LSB)
TEMPERATURE (°C)
AV
DD
= 5V
DV
DD
= 3V
V
DRIVE
= 3V
f
SAMPLE
= 225kSPS
INTERNAL REFERENCE
SINGLE-ENDED MODE
0V TO V
REF
, –DNL
0V TO V
REF
, +DNL
0V TO 2 × V
REF
, –DNL
0V TO 2 × V
REF
, +DNL
0V TO 4 × V
REF
, –DNL
0V TO 4 × V
REF
, +DNL
(AV
DD
– 4 × V
REF
) TO AV
DD
, –DNL
(AV
DD
– 4 × V
REF
) TO AV
DD
, +DNL
10660-011
Figure 13. ADC DNL vs. Temperature
–5
–4
–3
–2
–1
0
1
2
3
4
5
–40 –20 0 20 40 60 80 100 120
GAIN ERROR (LSB)
TEMPERATURE (°C)
0V TO 4 × V
REF
0V TO 2 × V
REF
(AV
DD
– 4 × V
REF
) TO AV
DD
0V TO V
REF
AV
DD
= 5.25V
DV
DD
= 5V
V
DRIVE
= 3.3V
f
SAMPLE
= 200kSPS
INTERNAL REFERENCE
10660-013
Figure 14. ADC Gain Error vs. Temperature, Single-Ended
and Differential Modes
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
100 1k 10k 100k 1M 10M 100M
CHANNEL-TO-CHANNEL ISOLATION (dB)
INPUT FREQUENCY (Hz)
AV
DD
= 5V
DV
DD
= 3V
V
DRIVE
= 3V
f
SAMPLE
= 250kSPS
f
IN
= 10kHz
INTERNAL REFERENCE
FULL-SCALE SIGNAL ON CHANNEL,
VIN0 TO VIN3 AND VIN5 TO VIN7
INPUT FREQUENCY RAMPED MEASUREMENTS ON VIN4
T
A
= 25°C
0V TO V
REF
0V TO 2 × V
REF
0V TO 4 × V
REF
(AV
DD
– 4 × V
REF
) TO AV
DD
10660-016
Figure 15. ADC Channel-to-Channel Isolation