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参数资料
型号： EVAL-AD7793EBZ
厂商： Analog Devices Inc
文件页数： 4/33页
文件大小： 0K
描述： BOARD EVALUATION FOR AD7793
标准包装： 1
ADC 的数量： 1
位数： 24
采样率（每秒）： 470
数据接口： 串行
输入范围： 0 ~ 5 V
在以下条件下的电源（标准）： 2.5mW @ 470SPS
工作温度： -40°C ~ 105°C
已用 IC / 零件： AD7793
已供物品： 板，缆线，CD
相关产品： AD7793BRU-ND - IC ADC 24BIT 3CH LP 16-TSSOP
AD7793BRUZ-REEL-ND - IC ADC 24BIT 3CH LP 16-TSSOP
AD7793BRUZ-ND - IC ADC 24BIT SIG-DEL 3CH 16TSSOP
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)
21.5 (19)
21 (18.5)
20 (17.5)
8.33
22 (19.5)
21.5 (19)
21 (18.5)
20.5 (18)
19.5 (17)
16.7
21.5 (19)
20.5 (18)
21 (18.5)
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)
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)
18.5 (16)
17.5 (15)
16.5 (14)
470
18.5 (16)
18 (15.5)
18.5 (16)
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)
8.33
16 (16)
16.7
16 (16)
33.2
16 (16)
62
16 (16)
16 (15.5)
123
16 (16)
165 (15.5)
16 (14.5)
242
16 (16)
16 (15.5)
16 (16)
16 (15)
16 (14)
470
16 (16)
16 (15.5)
16 (16)
16 (15.5)
16 (14.5)
15.5 (13.5)
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