ISL26132_14 Datasheet, PDF (8/23 Pages) Intersil Corporation – Low-Noise 24-bit Delta Sigma ADC

ISL26132, ISL26134
Typical Characteristics
10
GAIN = 1
RATE = 10Sps
5
300
GAIN = 1, N = 1024
RATE = 10Sps
250 _{STD DEV = 1.635 LSB}
VREF = 2.5V
200
0
150
100
-5
50
-10
0
200
400
600
800
TIME (SAMPLES)
FIGURE 2. NOISE AT GAIN = 1, 10Sps
10
GAIN = 2
RATE = 10Sps
5
1000
0
-5
0
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7
OUTPUT CODE (LSB)
FIGURE 3. NOISE HISTOGRAM AT GAIN = 1, 10Sps
250
GAIN = 2, N = 1024
RATE = 10Sps
200 ^{STD DEV = 1.989 LSB}
VREF = 2.5V
150
100
50
-10
0
200
400
600
800
TIME (SAMPLES)
FIGURE 4. NOISE AT GAIN = 2, 10Sps
20
GAIN = 64
15 ^{RATE = 10Sps}
10
5
0
-5
-10
-15
0
200
400
600
800
TIME (SAMPLES)
FIGURE 6. NOISE AT GAIN = 64, 10Sps
1000
1000
0
-8
-6
-4
-2
0
2
4
6
8
OUTPUT CODE (LSB)
FIGURE 5. NOISE HISTOGRAM AT GAIN = 2, 10Sps
120
GAIN = 64, N = 1024
RATE = 10Sps
100 STD DEV = 4.627 LSB
VREF = 2.5V
80
60
40
20
0
-20 -15 -10 -5
0
5
10
15
20
OUTPUT CODE (LSB)
FIGURE 7. NOISE HISTOGRAM AT GAIN = 64, 10Sps
Submit Document Feedback
8
FN6954.3
November 20, 2014