ISL26132_14 Datasheet, PDF (10/23 Pages) Intersil Corporation – Low-Noise 24-bit Delta Sigma ADC

ISL26132, ISL26134
Typical Characteristics (Continued)
100
GAIN = 64
RATE = 80Sps
50
50
GAIN = 64, N = 1024
RATE = 80Sps
40 ^{STD DEV = 12.15 LSB}
VREF = 2.5V
30
0
20
-50
10
-100
0
200
400
600
800
TIME (SAMPLES)
FIGURE 14. NOISE AT GAIN = 64, 80Sps
160
GAIN = 128
120 RATE = 80Sps
80
40
0
-40
-80
-120
-160
-200
0
200
400
600
800
TIME (SAMPLES)
FIGURE 16. NOISE AT GAIN = 128, 80Sps
10
1000
1000
0
-40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40
OUTPUT CODE (LSB)
FIGURE 15. NOISE HISTOGRAM AT GAIN = 64, 80Sps
30
GAIN = 128, N = 1024
RATE = 80Sps
25 _{STD DEV = 23.215 LSB}
VREF = 2.5V
20
15
10
5
0
-80 -60 -40 -20
0
20 40 60 80
OUTPUT CODE (LSB)
FIGURE 17. NOISE HISTOGRAM AT GAIN = 128, 80Sps
10000
8
NORMAL MODE, PGA = 64.128
6
NORMAL MODE, PGA = 1, 2
4
2
1000
100
10
NORMAL MODE, ALL PGA GAINS
POWERDOWN MODE
0
-40
-10
20
50
80
110
TEMPERATURE (°C)
FIGURE 18. ANALOG CURRENT vs TEMPERATURE
1
-40
-10
20
50
80
110
TEMPERATURE (°C)
FIGURE 19. DIGITAL CURRENT vs TEMPERATURE
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FN6954.3
November 20, 2014