AD7195 Analog Devices, AD7195 Datasheet - Page 16

• Manufacturer Part Number: AD7195
• Description: 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA and AC Excitation
• Manufacturer: Analog Devices

Specifications of AD7195

• Resolution (bits): 24bit
• # Chan: 4
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Bip,SE-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

AD7195
SINC
Table 15. RMS Noise (nV) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
32
16
5
2
1
Table 16. Peak-to-Peak Noise (nV) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
32
16
5
2
1
Table 17. Effective Resolution (Peak-to-Peak Resolution) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
32
16
5
2
1
1
When ac excitation is enabled, the rms noise and resolution is the same as for chop enabled mode.
The output peak-to-peak (p-p) resolution is listed in parentheses.
3
CHOP ENABLED
Output Data
Rate (Hz)
1.56
2.5
3.33
16.6
20
50
100
320
800
1600
Output Data
Rate (Hz)
1.56
2.5
3.33
16.6
20
50
100
320
800
1600
Output Data
Rate (Hz)
1.56
2.5
3.33
16.6
20
320
100
320
800
1600
Settling
Time (ms)
1282
800
600
120
100
40
20
6.25
2.5
1.25
Settling
Time (ms)
1282
800
600
120
100
40
20
6.25
2.5
1.25
Settling
Time (ms)
1282
800
600
120
100
40
20
6.25
2.5
1.25
Gain of 1
205
332
431
778
849
1061
1379
2828
40,022
312,540
Gain of 1
1202
1697
2121
4667
4808
6293
9192
17,680
219,200
1,838,500
Gain of 1
24 (23)
24 (22.5)
24 (22.5)
23.6 (21)
23.5 (21)
23.2 (20.5)
22.8 (20)
21.8 (19)
17.9 (15.4)
15 (12.4)
1
Gain of 8
88
95
103
113
120
163
218
417
4950
38,890
Gain of 8
530
566
636
686
707
990
1414
2404
29,000
212,200
Gain of 8
24 (21.5)
23.8 (21.3)
23.7 (21)
23.4 (20.8)
23.3 (20.6)
22.9 (20.3)
22.5 (19.8)
21.5 (19)
17.9 (15.4)
15 (12.4)
Rev. 0 | Page 16 of 44
1
Gain of 16
37
40
41
61
67
92
124
233
2475
19,800
Gain of 16
184
240
255
318
424
474
707
1556
15,560
120,200
Gain of 16
24 (21.5)
23.8 (21.3)
23.7 (21)
23.3 (20.8)
23.1 (20.5)
22.7 (20.2)
22.3 (19.8)
21.4 (18.6)
17.9 (15.3)
14.9 (12.3)
1
Gain of 32
17
21
23
35
39
57
78
141
1273
9900
Gain of 32
92
120
141
198
205
382
474
849
8485
55,870
22.4 (19.8)
Gain of 32
24 (21.5)
23.8 (21.3)
23.7 (21)
23.1 (20.5)
22.9 (20.5)
21.9 (19.3)
21.1 (18.5)
17.9 (15.2)
14.9 (12.3)
1
Gain of 64
24 (21.5)
23.8 (21.3)
23.7 (21)
22.6 (20.1)
22.4 (19.8)
21.9 (19.2)
21.3 (18.8)
20.5 (18)
17.9 (15.2)
14.9 (12.3)
Gain of 64
7.5
9
11.5
25
28
41
59
106
636
4950
Gain of 64
46
59
71
141
170
255
332
601
3960
29,000
1
Gain of 128
6.5
8
9
21
23
35
52
94
346
2440
Gain of 128
40
42
49
127
141
219
354
566
2192
16,970
Gain of 128
23.5 (20.9)
23.2 (20.8)
23.1 (20.6)
21.9 (19.2)
21.7 (19.1)
21.1 (18.4)
20.5 (17.8)
19.7 (17.1)
17.8 (15.1)
14.9 (12.2)
1