ISL26102 Datasheet, PDF (7/21 Pages) Intersil Corporation – Low-Noise 24-bit Delta Sigma ADC

ISL26102, ISL26104
TABLE 2. NOISE FREE BITS
OUTPUT WORD RATE
(Note 11)
NOISE-FREE BITS
1
2
4
8
16
32
64
128
2.5
21.9
21.8
21.8
21.9
21.6
21.4
20.8
19.8
5
21.8
21.7
21.7
21.7
21.5
21.1
20.4
19.5
10
21.5
21.4
21.5
21.3
21.2
20.7
19.9
19.0
20
21.2
21.2
21.2
21.0
20.9
20.3
19.5
18.6
40
20.8
20.8
20.8
20.6
20.4
19.8
19.0
18.0
80
20.4
20.4
20.4
20.2
19.9
19.4
18.5
17.6
100
20.3
20.3
20.2
20.0
19.8
19.2
18.4
17.4
160
19.9
20.0
19.8
19.7
19.4
18.8
18.0
17.0
200
19.8
19.8
19.7
19.6
19.3
18.7
17.8
16.9
320
19.5
19.5
19.3
19.3
19.0
18.3
17.5
16.5
400
19.3
19.3
19.2
19.1
18.8
18.1
17.3
16.4
640
19.0
18.9
18.9
18.8
18.5
17.8
17.0
16.0
800
18.8
18.8
18.7
18.6
18.4
17.7
16.8
15.9
1000
18.7
18.6
18.6
18.4
18.2
17.5
16.7
15.7
1280
18.5
18.4
18.4
18.3
18.0
17.3
16.5
15.5
1600
18.3
18.2
18.2
18.1
17.8
17.1
16.4
15.5
2000
18.2
18.1
18.0
18.0
17.7
17.0
16.3
15.3
2560
18.0
17.9
17.9
17.8
17.5
16.8
16.2
15.2
3200
17.8
17.8
17.7
17.6
17.3
16.7
16.0
15.1
4000
17.6
17.6
17.6
17.4
17.2
16.6
15.9
14.9
NOTE:
11. Noise-free resolution in Table 2 is calculated as LOG ((Input Span)/(RMS Noise x 6.6))/LOG(2). The result is rounded to the nearest tenth of a bit. The
Input Span is equivalent to ±0.5VREF/GAIN, V_REF = 5V. The RMS noise is selected from Table 1 for the desired Output Word Rate and Gain option.
10
10000
8
NORMAL MODE
6
4
2
1000
100
10
NORMAL MODE, ALL PGA GAINS
POWERDOWN MODE
0
-40
-10
20
50
80
110
TEMPERATURE (°C)
FIGURE 3. ANALOG CURRENT vs TEMPERATURE (GAIN = 2 TO 128)
1
-40
-10
20
50
80
110
TEMPERATURE (°C)
FIGURE 4. DIGITAL CURRENT vs TEMPERATURE
7
FN7608.0
October 12, 2012