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EVAL-AD7793EBZ1 Datasheet(PDF) 11 Page - Analog Devices

Part # EVAL-AD7793EBZ1
Description  3-Channel, Low Noise, Low Power, 16-/24-Bit 誇-? ADC with On-Chip In-Amp and Reference
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

EVAL-AD7793EBZ1 Datasheet(HTML) 11 Page - Analog Devices

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AD7792/AD7793
Rev. B | Page 11 of 32
OUTPUT NOISE AND RESOLUTION SPECIFICATIONS
EXTERNAL REFERENCE
Table 5 shows the output rms noise of the AD7792/AD7793 for
some of the update rates and gain settings. The numbers given
are for the bipolar input range with an external 2.5 V reference.
These numbers are typical and are generated with a differential
input voltage of 0 V. Table 6 and Table 7 show the effective
resolution, with the output peak-to-peak (p-p) resolution
shown in parentheses for the AD7793 and AD7792, respectively.
It is important to note that the effective resolution is calculated
using the rms noise, while the p-p resolution is based on the p-p
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 LSB.
Table 5. Output RMS Noise (μV) vs. Gain and Output Update Rate for the AD7792 and AD7793 Using an External 2.5 V Reference
Update Rate (Hz)
Gain of 1
Gain of 2
Gain of 4
Gain of 8
Gain of 16
Gain of 32
Gain of 64
Gain of 128
4.17
0.64
0.6
0.29
0.22
0.1
0.065
0.039
0.041
8.33
1.04
0.96
0.38
0.26
0.13
0.078
0.057
0.055
16.7
1.55
1.45
0.54
0.36
0.18
0.11
0.087
0.086
33.2
2.3
2.13
0.74
0.5
0.23
0.17
0.124
0.118
62
2.95
2.85
0.92
0.58
0.29
0.2
0.153
0.144
123
4.89
4.74
1.49
1
0.48
0.32
0.265
0.283
242
11.76
9.5
4.02
1.96
0.88
0.45
0.379
0.397
470
11.33
9.44
3.07
1.79
0.99
0.63
0.568
0.593
Table 6. Typical Resolution (Bits) vs. Gain and Output Update Rate for the AD7793 Using an External 2.5 V Reference
Update Rate (Hz)
Gain of 1
Gain of 2
Gain of 4
Gain of 8
Gain of 16
Gain of 32
Gain of 64
Gain of 128
4.17
23 (20.5)
22 (19.5)
22 (19.5)
21.5 (19)
21.5 (19)
21 (18.5)
21 (18.5)
20 (17.5)
8.33
22 (19.5)
21.5 (19)
21.5 (19)
21 (18.5)
21 (18.5)
21 (18.5)
20.5 (18)
19.5 (17)
16.7
21.5 (19)
20.5 (18)
21 (18.5)
20.5 (18)
20.5 (18)
20.5 (18)
20 (17.5)
19 (16.5)
33.2
21 (18.5)
20 (17.5)
20.5 (18)
20 (17.5)
20.5 (18)
20 (17.5)
19 (16.5)
18.5 (16)
62
20.5 (18)
19.5 (17)
20.5 (18)
20 (17.5)
20 (17.5)
19.5 (17)
19 (16.5)
18 (15.5)
123
20 (17.5)
19 (16.5)
19.5 (17)
19 (16.5)
19.5 (17)
19 (16.5)
18 (15.5)
17 (14.5)
242
18.5 (16)
18 (15.5)
18 (15.5)
18 (15.5)
18.5 (16)
18.5 (16)
17.5 (15)
16.5 (14)
470
18.5 (16)
18 (15.5)
18.5 (16)
18.5 (16)
18 (15.5)
18 (15.5)
17 (14.5)
16 (13.5)
Table 7. Typical Resolution (Bits) vs. Gain and Output Update Rate for the AD7792 Using an External 2.5 V Reference
Update Rate (Hz)
Gain of 1
Gain of 2
Gain of 4
Gain of 8
Gain of 16
Gain of 32
Gain of 64
Gain of 128
4.17
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
8.33
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16.7
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
33.2
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
62
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (15.5)
123
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
16 (16)
165 (15.5)
16 (14.5)
242
16 (16)
16 (15.5)
16 (15.5)
16 (15.5)
16 (16)
16 (16)
16 (15)
16 (14)
470
16 (16)
16 (15.5)
16 (16)
16 (16)
16 (15.5)
16 (15.5)
16 (14.5)
15.5 (13.5)



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