ISL267817 Datasheet, PDF (9/18 Pages) Intersil Corporation – 12-Bit Differential Input 200kSPS SAR ADC

ISL267817
Typical Performance Characteristics T_A = +25°C, V_CC = 5V, V_REF = 2.5V, f_SAMPLE = 200kHz,
f_CLK = 16 * f_SAMPLE, unless otherwise specified. (Continued)
0
73
SNR
-20
72
-40
71
-60
70
SINAD
-80
69
-100
68
-120
0
25
50
75
100
FREQUENCY (kHz)
FIGURE 12. FREQUENCY SPECTRUM (8192 POINT FFT;
f_IN = 9.9kHz, –0.5dB
67
1
10
100
INPUT FREQUENCY (kHz)
FIGURE 13. SIGNAL-TO-NOISE RATIO AND SIGNAL-TO-
(NOISE+DISTORTION) vs INPUT FREQUENCY
95
-95
SFDR
90
-90
85
-85
80
-80
THD
75
-75
70
-70
65
-65
1
10
100
INPUT FREQUENCY (kHz)
FIGURE 14. SPURIOUS FREE DYNAMIC RANGE AND TOTAL
HARMONIC DISTORTION vs INPUT FREQUENCY
80
70
60
50
40
30
20
10
0
-60 -50 -40 -30 -20 -10 0
INPUT LEVEL (dB)
FIGURE 15. SIGNAL-TO-(NOISE+DISTORTION) vs INPUT LEVEL
1.5
1.0
CHANGE IN INTEGRAL
0.5
LINEARITY (LSB)
CHANGE IN DIFFERENTIAL
LINEARITY (LSB)
0.0
-0.5
0
80
160
240
320
400
SAMPLE RATE (kHz)
FIGURE 16. CHANGE IN INTEGRAL LINEARITY and DIFFERENTIAL
LINEARITY vs SAMPLE RATE
1.00
0.75
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
0
512 1024 1536 2048 2560 3072 3584 4096
FIGURE 17. INTEGRAL LINEARITY ERROR vs CODE
9
FN7877.2
April 19, 2012