ISL267452 Datasheet, PDF (8/16 Pages) Intersil Corporation – 12-Bit, 555kSPS SAR ADC

ISL267452
Typical Performance Characteristics
75
70
2.7V
65
3.6V
4.75V
5.25V
60
55
10
100
1k
INPUT FREQUENCY (kHz)
FIGURE 5. ISL267452 SINAD vs ANALOG INPUT FREQUENCY FOR
VARIOUS SUPPLY VOLTAGES
0
8192 POINT FFT
-20
f_SAMPLE = 555kSPS
f_IN = 92.5kHz
SINAD = 70.9dB
-40
THD = 82.9dB
SFDR = 86.6dB
-60
-80
-100
-120
-140
-160
0
50
100
150
200
250 277.5
FREQUENCY (kHz)
FIGURE 6. ISL267452 DYNAMIC PERFORMANCE WITH VDD = 3V
0
8192 POINT FFT
-20
f_SAMPLE = 555kSPS
f_IN = 92.5kHz
SINAD = 71.7dB
-40
THD = 85dB
SFDR = 86.2dB
-60
-80
-100
-120
-140
-160
0
50
100
150
200
250 277.5
FREQUENCY (kHz)
FIGURE 7. ISL267452 DYNAMIC PERFORMANCE WITH VDD = 5V
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
10k
100k
1k
10k
FREQUENCY (Hz)
FIGURE 8. CMRR vs FREQUENCY FOR VDD = 5V
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0
1024
2048
CODE
3072
4096
FIGURE 9. TYPICAL DNL FOR THE ISL267452 FOR VDD = 5V
8
0
250mV_P-P SINE WAVE ON VDD
NO DECOUPLING ON VDD
-20
-40
-60
-80
-100
-120
0 100 200 300 400 500 600 700 800 900 1000
FREQUENCY (kHz)
FIGURE 10. PSRR vs SUPPLY RIPPLE FREQUENCY WITHOUT SUPPLY
DECOUPLING
FN8255.0
July 26, 2012