DDC264 Datasheet, PDF (9/26 Pages) Texas Instruments – 64-Channel, Current-Input Analog-to-Digital Converter

DDC264
www.ti.com
SBAS368C – MAY 2006 – REVISED JULY 2011
Figure 17. NOISE vs C_SENSOR
600
550
DDC264C, 3kSPS
DDC264CK, 6kSPS
500
Range 0
450
400
350
300
250
200
Range 3
Range 2
150
100
Range 1
50
0
0 100 200 300 400 500 600 700 800 900 1000
C_SENSOR (pF)
Figure 18.
RANGE
Range 0: 12.5pC
Range 1: 50pC
Range 2: 100pC
Range 3: 150pC
Range 0: 12.5pC
Range 1: 50pC
Range 2: 100pC
Range 3: 150pC
Range 0: 12.5pC
Range 1: 50pC
Range 2: 100pC
Range 3: 150pC
0pF
16
6.4
5.1
4.8
0.20
0.32
0.51
0.72
1250
2010
3220
4530
10pF
20
7.4
5.5
5
0.25
0.37
0.55
0.75
1560
2310
3440
4730
Table 1. NOISE vs C_SENSOR(1)
30pF
43pF
C_SENSOR
57pF
100pF
ppm of FSR, rms
30
37
44
71
10
12
14
21
7.1
8
9.1
12
6
6.5
7.2
9.6
fC, rms
0.38
0.46
0.55
0.89
0.53
0.62
0.73
1.09
0.71
0.80
0.91
1.28
0.90
0.98
1.08
1.45
Electrons, rms
2340
2890
3430
5540
3340
3910
4570
6800
4450
5000
5680
7990
5610
6120
6770
9050
270pF
160
45
25
17
2.0
2.29
2.50
2.67
12480
14200
15600
16700
470pF
1000pF
270
510
74
130
39
71
27
49
3.38
6.38
3.73
6.88
3.97
7.16
4.14
7.36
21070
23300
24800
25800
39790
42900
44700
45900
(1) Noise in Table 1 is expressed in three different units for reader convenience. The first section lists noise in units of parts per million of
full-scale range; the second section shows noise as an equivalent input charge (in fC); and the third section converts noise to electrons.
Copyright © 2006–2011, Texas Instruments Incorporated
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