AD7193 Analog Devices, AD7193 Datasheet - Page 18

• Manufacturer Part Number: AD7193
• Description: 4-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
• Manufacturer: Analog Devices

Specifications of AD7193

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

AD7193
RMS NOISE AND RESOLUTION
The following tables show the rms noise, peak-to-peak noise,
effective resolution, and noise free (peak-to-peak) resolution of
the AD7193 for various output data rates and gain settings with
chop disabled for the sinc
mode. The numbers given are for the bipolar input range with
an external 5 V reference. These numbers are typical and are
generated with a differential input voltage of 0 V when the ADC
SINC
Table 7. RMS Noise (nV) vs. Gain and Output Data Rate
Filter Word
(Decimal)
1023
640
480
96
80
32
16
5
2
1
Table 8. 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 9. 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
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
150
300
960
2400
4800
Output Data
Rate (Hz)
4.7
7.5
10
50
60
150
300
960
2400
4800
Output Data
Rate (Hz)
4.7
7.5
10
50
60
150
300
960
2400
4800
4
and sinc
Settling
Time (ms)
852.5
533
400
80
66.7
26.7
13.3
4.17
1.67
0.83
3
filters and for fast settling
1
24 (22.1)
24 (21.8)
24 (21.7)
23.3 (20.7)
23.3 (20.5)
22.6 (19.9)
22.1 (19.4)
21.2 (18.4)
20.4 (17.6)
18.6 (15.8)
Settling
Time (ms)
852.5
533
400
80
66.7
26.7
13.3
4.17
1.67
0.83
Settling
Time (ms)
852.5
533
400
80
66.7
26.7
13.3
4.17
1.67
0.83
Rev. C | Page 18 of 56
8
24 (21.8)
24 (21.5)
24 (21.4)
23 (20.4)
22.9 (20.3)
22.3 (19.7)
21.8 (19.1)
21 (18.2)
20.3 (17.4)
18.5 (15.7)
1
2200
2700
3000
6000
6600
10,000
14,000
28,000
49,000
175,000
1
340
410
460
950
1000
1600
2300
4200
7100
26,000
is continuously converting on a single channel. It is important
to note that the effective resolution is calculated using the rms
noise, whereas the peak-to-peak resolution is calculated based
on peak-to-peak noise. The peak-to-peak resolution represents
the resolution for which there is no code flicker. With chop
enabled, the resolution improves by 0.5 bits.
8
340
410
450
890
1000
1500
2200
4100
7000
23,000
8
53
67
76
150
160
250
340
610
1000
3400
16
24 (21.6)
23.9 (21.4)
23.7 (21.2)
22.9 (20.3)
22.8 (20.1)
22.1 (19.4)
21.6 (18.9)
20.8 (18)
20.1 (17.3)
18.5 (15.7)
Gain of
16
34
40
45
80
90
140
190
350
570
1700
16
190
230
260
500
560
920
1300
2400
3800
12,000
32
24 (21.4)
23.6 (21.2)
23.4 (21)
22.6 (19.9)
22.5 (19.8)
21.8 (19.1)
21.3 (18.6)
20.5 (17.8)
19.8 (17)
18.4 (15.6)
1
Gain of
Gain of
32
18
24
28
50
54
83
120
210
350
910
32
110
130
150
320
350
540
800
1400
2400
6100
64
23.6 (21.1)
23.4 (20.7)
23.2 (20.6)
22 (19.4)
21.9 (19.3)
21.2 (18.6)
20.7 (18)
19.9 (17.3)
19.2 (16.4)
18.2 (15.4)
64
12
14
16
37
40
63
90
160
260
530
64
70
90
100
230
250
400
600
1000
1800
3500
Data Sheet
128
22.8 (20.2)
22.5 (19.8)
22.3 (19.6)
21.3 (18.6)
21.1 (18.4)
20.4 (17.7)
19.9 (17.2)
19.1 (16.4)
18.4 (15.5)
17.6 (14.9)
128
11
13
15
31
35
55
79
140
230
380
128
65
85
95
200
220
370
530
900
1700
2600