ISL26320 Datasheet, PDF (11/23 Pages) Intersil Corporation – 12-bit, 250kSPS Low-power ADCs with Single-ended and Differential Inputs and Multiple Input Channels

ISL26320, ISL26321, ISL26322, ISL26323, ISL26324, ISL26325, ISL26329
Typical Performance Characteristics T_A = +25°C, V_DD = 5V, V_REF = 5V, f_SAMPLE = 250kHz, f_SCLK = 20MHz,
unless otherwise specified. (Continued)
75
0
SNR
-10
-20
70
-30
SINAD
-40
65
-50
-60
-70
60
-80
-90
55
100
1k
10k
100k
INPUT FREQUENCY (Hz)
-100
1M
100
1k
10k
100k
1M
INPUT FREQUENCY (Hz)
FIGURE 15. SNR AND SINAD vs INPUT FREQUENCY
FIGURE 16. THD vs INPUT FREQUENCY
0
-20
-40
-60
-80
-100
-120
-140
-1600
SNR = 73.6dB
THD = -87.6dB
SINAD = 73.4dB
SFDR = 89.1dB
ENOB = 11.4
70,000
60,000
50,000
65,536
CODES
40,000
30,000
20,000
10,000
0
0
25000
50000
75000
100000
125000
CODES
CODES
0
-3
-2
-1
0
1
2
3
FREQUENCY (Hz)
CODE
FIGURE 17. SINGLE-TONE FFT
FIGURE 18. SHORTED INPUT HISTOGRAM
11
FN8273.0
June 8, 2012