Datasheet

AD7294 Data Sheet
Rev. H | Page 14 of 48
TYPICAL PERFORMANCE CHARACTERISTICS
20
0
–20
–40
–60
–80
–100
–120
0 100008000600040002000
AMPLITUDE (dB)
FREQUENCY (kHz)
8192 POINT FFT
AV
DD
= DV
DD
= 5V
V
DRIVE
= 5V, V
REF
RANGE
F
SAMPLE
= 22.22kSPS
F
IN
= 10kHz, F
SCLK
= 400kHz
SINGLE ENDED
SNR = 71dB, THD = –82dB
05747-088
Figure 6. Signal-to-Noise Ratio Single-Ended, V
REF
Range
05747-089
20
0
–20
–40
–60
–80
–100
–120
0 100008000600040002000
AMPLITUDE (dB)
FREQUENCY (kHz)
8192 POINT FFT
AV
DD
= DV
DD
= 5V
V
DRIVE
= 5V, 2V
REF
RANGE
F
SAMPLE
= 22.22kSPS
F
IN
= 10kHz, F
SCLK
= 400kHz
SINGLE ENDED
SNR = 72dB, THD = –80dB
Figure 7. Signal-to-Noise Ratio Single-Ended, 2 × V
REF
Range
05747-087
20
0
–20
–40
–60
–80
–100
–120
0 100008000600040002000
AMPLITUDE (dB)
FREQUENCY (kHz)
8192 POINT FFT
AV
DD
= DV
DD
= 5V
V
DRIVE
= 5V, V
REF
RANGE
F
SAMPLE
= 22.22kSPS
F
IN
= 10kHz, F
SCLK
= 400kHz
DIFFERENTIAL
SNR = 72dB, THD = –86dB
Figure 8. Signal-to-Noise Ratio Differential, V
REF
Range
05747-086
20
0
–20
–40
–60
–80
–100
–120
0 100008000600040002000
AMPLITUDE (dB)
FREQUENCY (kHz)
8192 POINT FFT
AV
DD
= DV
DD
= 5V
V
DRIVE
= 5V, 2V
REF
RANGE
F
SAMPLE
= 22.22kSPS
F
IN
= 10kHz, F
SCLK
= 400kHz
DIFFERENTIAL
SNR = 73dB, THD = –82dB
Figure 9. Signal-to-Noise Ratio Differential, 2 × V
REF
Range
1.0
0.8
0.4
0.6
0.2
0
–0.4
–1.0
–0.8
–0.2
–0.6
INL (LSB)
CODE
05747-077
256
5120
768
1024
1280
1536
1792
2048
2304
2560
2816
3072
3328
3584
3840
4096
T
A
= 25°C
V
DRIVE
= 5V, V
REF
RANGE
V
REF
= 2.5V
V
DD
= 5V
SINGLE-ENDED
Figure 10. ADC INL Single-Ended, V
REF
Range
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.8
0.4
0.6
DNL (LSB)
CODE
T
A
= 25°C
V
DRIVE
= 5V, V
REF
RANGE
V
REF
= 2.5V
V
DD
= 5V
SINGLE-ENDED
256
5120
768
1024
1280
1536
1792
2048
2304
2560
2816
3072
3328
3584
3840
4096
05747-072
Figure 11. ADC DNL Single-Ended, V
REF
Range