AD7192 查看數據表（PDF） - Analog Devices
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AD7192 Datasheet PDF : 40 Pages
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AD7192
RMS NOISE AND RESOLUTION
The AD7192 has a choice of two filter types: sinc4 and sinc3.
In addition, the AD7192 can be operated with chop enabled
or chop disabled.
The following tables show the rms noise of the AD7192 for some
of the output data rates and gain settings with chop disabled
and enabled for the sinc4 and sinc3 filters. The numbers given
are for the bipolar input range with the external 5 V reference.
These numbers are typical and are generated with a differential
input voltage of 0 V when the ADC is continuously converting
SINC4 CHOP DISABLED
Table 6. RMS Noise (nV) vs. Gain and Output Data Rate
Output
Filter Word Data Rate
(Decimal) (Hz)
Settling
Time
(ms)
Gain of 1
Gain of 8
1023
4.7
852.5
350
50
640
7.5
533
425
62
480
10
400
490
85
96
50
80
2000
260
80
60
66.7
2100
273
40
120
33.3
2400
315
32
150
26.7
2500
335
16
300
13.3
3100
420
5
960
4.17
4800
690
2
2400
1.67
7500
1100
1
4800
0.83
16,300
2200
on a single channel. The effective resolution is also shown, and
the output peak-to-peak (p-p) resolution, or noise-free resolution,
is listed in parentheses. It is important to note that the effective
resolution is calculated using the rms noise, whereas the p-p
resolution is calculated based on peak-to-peak noise. The p-p
resolution represents the resolution for which there is no code
flicker. These numbers are typical and are rounded to the
nearest ½ LSB.
Gain of 16
30
36
43
134
139
175
185
240
390
640
1200
Gain of 32
18
21
23
73
77
95
110
145
240
390
670
Gain of 64
13
15
17
46
48
64
71
95
170
273
427
Gain of 128
11
13
15
34
38
51
58
81
145
235
345
Table 7. Effective Resolution (Peak-to-Peak Resolution) vs. Gain and Output Data Rate
Output
Filter Word Data Rate
(Decimal) (Hz)
Settling
Time
(ms)
Gain of 11
Gain of 81
Gain of 161
Gain of 321
1023
4.7
852.5
24 (22)
24 (22)
24 (21.5)
24 (21.5)
640
7.5
533
24 (22)
24 (21.5)
24 (21.5)
23.5 (21)
480
10
400
24 (21.5)
23.5 (21)
23.5 (21)
23.5 (21)
96
50
80
22 (19.5)
22 (19.5)
22 (19.5)
22 (19.5)
80
60
66.7
22 (19.5)
22 (19.5)
22 (19.5)
21.5 (19)
40
120
33.3
22 (19.5)
21.5 (19)
21.5 (19)
21.5 (19)
32
150
26.7
21.5 (19)
21.5 (19)
21.5 (19)
21 (18.5)
16
300
13.3
21.5 (19)
21.5 (19)
21 (18.5)
21 (18.5)
5
960
4.17
20.5 (18)
20.5 (18)
20.5 (18)
20 (17.5)
2
2400
1.67
20 (17.5)
20 (17.5)
19.5 (17)
19.5 (17)
1
4800
0.83
19 (16.5)
19 (16.5)
19 (16.5)
18.5 (16)
1 The output peak-to-peak (p-p) resolution is listed in parentheses.
Gain of 641
23.5 (21)
23 (20.5)
23 (20.5)
21.5 (19)
21.5 (19)
21 (18.5)
21 (18.5)
20.5 (18)
19.5 (17)
19 (16.5)
18.5 (16)
Gain of 1281
22.5 (20)
22.5 (20)
22 (19.5)
21 (18.5)
20.5 (18)
20.5 (18)
20 (17.5)
19.5 (17)
19 (16.5)
18 (15.5)
17.5 (15)
Rev. A | Page 14 of 40
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