AD7708_15 Datasheet, PDF (18/44 Pages) Analog Devices – 8-/10-Channel, Low Voltage

AD7708/AD7718
Table II. Typical Output RMS Noise vs. Input Range and Update Rate for AD7718 with Chop Enabled (CHOP = 0);
Output RMS Noise in ␮V
SF
Data Update
Input Range
Word Rate (Hz) ؎20 mV ؎40 mV ؎80 mV ؎160 mV ؎320 mV
؎640 mV
؎1.28 V
؎2.56 V
13
105.3
1.50
1.50
1.60
1.75
3.50
4.50
6.70
11.75
23
59.36
1.0
1.02
1.06
1.15
1.22
1.77
3.0
5.08
27
50.56
0.95
0.95
0.98
1.00
1.10
1.66
5.0
69
19.79
0.60
0.65
0.65
0.65
0.65
0.95
1.40
2.30
255
5.35
0.35
0.35
0.37
0.37
0.37
0.51
0.82
1.25
Table III. Peak-to-Peak Resolution vs. Input Range and Update Rate for AD7718 with Chop Enabled (CHOP = 0);
Peak-to-Peak Resolution in Bits
SF
Word
Data Update
Input Range
Rate (Hz) ؎20 mV ؎40 mV ؎80 mV ؎160 mV ؎320 mV
؎640 mV
؎1.28 V
؎2.56 V
13
105.3
12
13
14
15
15
15.5
16
16
23
59.36
12.5
13.5
14.5
15
16
17
17
17
27
50.56
12.5
13.5
14.5
15.5
16.5
17
17
17
69
19.79
13
14
15
16
17
17.5
18
18.5
255
5.35
14
15
16
17
18
18.5
18.8
19.2
Table IV. Typical Output RMS Noise vs. Input Range and Update Rate for AD7708 with Chop Enabled (CHOP = 0);
Output RMS Noise in ␮V
SF
Data Update
Input Range
Word Rate (Hz) ؎20 mV ؎40 mV ؎80 mV ؎160 mV ؎320 mV
؎640 mV
؎1.28 V
؎2.56 V
13
105.3
1.50
1.50
1.60
1.75
3.50
4.50
6.70
11.75
23
59.36
1.0
1.02
1.06
1.15
1.22
1.77
3.0
5.08
27
50.56
0.95
0.95
0.98
1.00
1.10
1.66
5.0
69
19.79
0.60
0.65
0.65
0.65
0.65
0.95
1.40
2.30
255
5.35
0.35
0.35
0.37
0.37
0.37
0.51
0.82
1.25
Table V. Peak-to-Peak Resolution vs. Input Range and Update Rate for AD7708 with Chop Enabled (CHOP = 0);
Peak-to-Peak Resolution in Bits
SF
Word
Data Update
Input Range
Rate (Hz) ؎20 mV ؎40 mV ؎80 mV ؎160 mV ؎320 mV
؎640 mV
؎1.28 V
؎2.56 V
13
105.3
12
13
14
15
15
23
59.35
12.5
13.5
14.5
15
16
27
50.56
12.5
13.5
14.5
15.5
16
69
19.79
13
14
15
16
16
255
5.35
14
15
16
16
16
15.5
16
16
16
16
16
16
16
16
16
16
16
16
16
16
–18–
REV. 0