AD7195 Analog Devices, AD7195 Datasheet - Page 15

• 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

SINC
Table 12. RMS Noise (nV) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
32
16
5
2
1
Table 13. 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 14. 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.
4
CHOP ENABLED
Output Data
Rate (Hz)
1.175
1.875
2.5
12.5
15
37.5
75
240
600
1200
Output Data
Rate (Hz)
1.175
1.875
2.5
12.5
15
37.5
75
240
600
1200
Output Data
Rate (Hz)
1.175
1.875
2.5
12.5
15
37.5
75
240
600
1200
Settling
Time (ms)
1702
1067
800
160
133
53.3
26.7
8.33
3.33
1.67
Settling
Time (ms)
1702
1067
800
160
133
53.3
26.7
8.33
3.33
1.67
Settling
Time (ms)
1702
1067
800
160
133
53.3
26.7
8.33
3.33
1.67
Gain of 1
198
276
332
707
778
990
1344
2192
3606
9900
Gain of 1
1131
1556
2121
4243
5091
5870
7780
14,142
22,627
60,800
Gain of 1
24 (23.1)
24 (22.6)
24 (22.2)
23.8 (21.2)
23.6 (20.9)
23.2 (20.7)
22.8 (20.3)
22.2 (19.4)
21.4 (18.8)
19.9 (17.3)
1
Gain of 8
85
92
99
127
141
156
191
325
523
1345
Gain of 8
474
495
530
707
849
1061
1202
2121
3606
9192
Gain of 8
24 (21.8)
23.9 (21.4)
23.8 (21.3)
23.5 (20.9)
23.3 (20.6)
22.9 (20.2)
22.6 (20)
21.8 (19.2)
21.1 (18.4)
19.8 (17.1)
Rev. 0 | Page 15 of 44
1
Gain of 16
41
45
46
61
62
85
106
184
297
680
Gain of 16
212
248
255
368
424
530
707
1273
1980
4950
Gain of 16
24 (21.8)
23.9 (21.4)
23.8 (21.3)
23.4 (20.9)
23.3 (20.5)
22.8 (20.2)
22.3 (19.8)
21.6 (18.9)
20.9 (18.2)
19.8 (16.9)
1
Gain of 32
18
22
23
34
35
51
67
120
191
368
Gain of 32
92
106
134
198
212
290
424
778
1202
2475
Gain of 32
24 (21.7)
23.9 (21.4)
23.8 (21.3)
23.2 (20.6)
23 (20.5)
22.5 (20)
22.1 (19.5)
21.3 (18.6)
20.6 (18)
19.6 (16.9)
1
Gain of 64
7
8.5
10
23
24
38
51
92
148
248
Gain of 64
46
57
71
127
156
240
311
573
990
1697
Gain of 64
24 (21.7)
23.9 (21.4)
23.8 (21.1)
22.7 (20.2)
22.6 (19.9)
22 (19.3)
21.5 (18.9)
20.7 (18.1)
20 (17.3)
19.3 (16.5)
1
Gain of 128
Gain of 128
23.6 (20.9)
23.3 (20.7)
23.2 (20.6)
21.9 (19.3)
21.8 (19.1)
21.1 (18.4)
20.6 (18)
19.8 (17.2)
19.1 (16.5)
18.5 (15.8)
6
7
8
18
21
33
45
78
134
200
Gain of 128
40
46
50
120
134
219
304
502
850
1345
AD7195
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