AS1543/44
Data Sheet - Typical Operating Characteristics
7 Typical Operating Characteristics
VDD = 5.25V; VREF = 2.5V, CREF = 4.7µF, RANGE=1, SE/FDN=1, TAMB = +25ºC (unless otherwise specified).
Figure 5. Integral Nonlinearity vs. Digital Output Code
Figure 6. Differential Nonlinearity vs. Digital Output Code
1
1
f
= 1Msps
f
= 1Msps
SAMPLE
SAMPLE
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
-0.2
-0.4
-0.6
-0.8
-1
0
1024
2048
3072
4096
0
1024
2048
3072
4096
Digital Output Code
Digital Output Code
Figure 7. FFT @ 50kHz; RANGE=1, SE/FDN=1
Figure 8. FFT @ 50kHz; RANGE=1, SE/FDN=0
20
20
f
= 1Msps
f
= 1Msps
SAMPLE
SAMPLE
NFFT = 32768
SNR=72.1dB
THD = -84.7dB
SFDR = 86.2dB
NFFT = 32768
SNR=71.0dB
THD = -85.5dB
SFDR = 86.5dB
0
-20
0
-20
-40
-40
-60
-60
-80
-80
-100
-120
-100
-120
0
100
200
300
400
500
0
100
200
300
400
500
Input Signal Frequency (kHz)
Input Signal Frequency (kHz)
Figure 9. ENOB vs. VREFIN; RANGE=1, SE/FDN=1
Figure 10. ENOB vs. Input Signal Frequency
11.7
11.8
VDD = 5V
11.7
11.6
11.6
VDD = 3V
11.5
VDD = 5.25V
11.5
11.4
11.3
11.2
11.1
11
11.4
11.3
11.2
11.1
11
VDD = 3.6V
VDD = 2.7V
VDD = 4.75V
1
2
3
4
5
10
100
Frequency (kHz)
1000
VREFIN (V)
www.austriamicrosystems.com
Revision 1.00
9 - 29
AMSCO [ AMS(艾迈斯) ]
