AD7192 Analog Devices, AD7192 Datasheet - Page 14

• Manufacturer Part Number: AD7192
• Description: 4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC with PGA
• Manufacturer: Analog Devices

Specifications of AD7192

• Resolution (bits): 24bit
• # Chan: 4
• Sample Rate: 4.8kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Bip,SE-Uni
• Ain Range: ± (Vref/Gain)
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7192
RMS NOISE AND RESOLUTION
The AD7192 has a choice of two filter types: sinc
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 sinc
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
SINC
Table 6. RMS Noise (nV) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
40
32
16
5
2
1
Table 7. Effective Resolution (Peak-to-Peak Resolution) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
40
32
16
5
2
1
1
The output peak-to-peak (p-p) resolution is listed in parentheses.
4
CHOP DISABLED
Output
Data Rate
(Hz)
4.7
7.5
10
50
60
120
150
300
960
2400
4800
Output
Data Rate
(Hz)
4.7
7.5
10
50
60
120
150
300
960
2400
4800
4
and sinc
Settling
Time
(ms)
852.5
533
400
80
66.7
33.3
26.7
13.3
4.17
1.67
0.83
Settling
Time
(ms)
852.5
533
400
80
66.7
33.3
26.7
13.3
4.17
1.67
0.83
3
filters. The numbers given
Gain of 1
24 (22)
24 (22)
24 (21.5)
22 (19.5)
22 (19.5)
22 (19.5)
21.5 (19)
21.5 (19)
20.5 (18)
20 (17.5)
19 (16.5)
Gain of 1
350
425
490
2000
2100
2400
2500
3100
4800
7500
16,300
4
and sinc
1
Gain of 8
24 (22)
24 (21.5)
23.5 (21)
22 (19.5)
22 (19.5)
21.5 (19)
21.5 (19)
21.5 (19)
20.5 (18)
20 (17.5)
19 (16.5)
Gain of 8
50
62
85
260
273
315
335
420
690
1100
3
2200
.
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1
Gain of 16
24 (21.5)
24 (21.5)
23.5 (21)
22 (19.5)
22 (19.5)
21.5 (19)
21.5 (19)
21 (18.5)
20.5 (18)
19.5 (17)
19 (16.5)
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
1
Gain of 32
24 (21.5)
23.5 (21)
23.5 (21)
22 (19.5)
21.5 (19)
21.5 (19)
21 (18.5)
21 (18.5)
20 (17.5)
19.5 (17)
18.5 (16)
Gain of 32
18
21
23
73
77
95
110
145
240
390
670
1
Gain of 64
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 64
13
15
17
46
48
64
71
95
170
273
427
1
Gain of 128
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)
Gain of 128
11
13
15
34
38
51
58
81
145
235
345
1