参数资料
型号: AD7795BRUZ
厂商: Analog Devices Inc
文件页数: 7/37页
文件大小: 0K
描述: IC ADC 16BIT 6CH LOW-PWR 24TSSOP
标准包装: 62
位数: 16
采样率(每秒): 470
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 2.5mW
电压电源: 模拟和数字
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 24-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 24-TSSOP
包装: 管件
输入数目和类型: 6 个差分,单极;6 个差分,双极
产品目录页面: 779 (CN2011-ZH PDF)
AD7794/AD7795
Rev. D | Page 14 of 36
Internal Reference
Table 8 shows the AD7794/AD7795 rms noise for some of the
update rates and gain settings. The numbers given are for the
bipolar input range with the internal 1.17 V reference. These
numbers are typical and are generated with a differential input
voltage of 0 V. Table 9 and Table 10 show the effective resolution
while the output peak-to-peak (p-p) resolution is listed in brackets.
It is important to note that the effective resolution is calculated
using the rms noise while 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 rounded to the nearest LSB.
Table 8. RMS Noise (μV) vs. Gain and Output Update Rate Using an Internal 1.17 V Reference with Chop Enabled
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
0.81
0.67
0.32
0.2
0.13
0.065
0.04
0.039
8.33
1.18
1.11
0.41
0.25
0.16
0.078
0.058
0.059
16.7
1.96
1.72
0.55
0.36
0.25
0.11
0.088
33.2
2.99
2.48
0.83
0.48
0.33
0.17
0.13
0.12
62
3.6
3.25
1.03
0.65
0.46
0.2
0.15
123
5.83
5.01
1.69
0.96
0.67
0.32
0.25
0.26
242
11.22
8.64
2.69
1.9
1.04
0.45
0.35
0.34
470
12.46
10.58
4.58
2
1.27
0.63
0.50
0.49
Table 9.
Effective Resolution (Bits) vs. Gain and Output Update Rate for the AD7794 Using an Internal 1.17 V Reference with Chop Enabled
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
21.5 (19)
20.5 (18)
21 (18.5)
20.5 (18)
20 (17.5)
19 (16.5)
8.33
21 (18.5)
20 (17.5)
20.5 (18)
20 (17.5)
19 (16.5)
18 (15.5)
16.7
20 (17.5)
19.5 (17)
20 (17.5)
19.5 (17)
19 (16.5)
19.5 (17)
18.5 (16)
17.5 (15)
33.2
19.5 (17)
19 (16.5)
19.5 (17)
19 (16.5)
18.5 (16)
18 (15.5)
17 (14.5)
62
19.5 (17)
18.5 (16)
19 (16.5)
18.5 (16)
18 (15.5)
17 (14.5)
123
18.5 (16)
18 (15.5)
18.5 (16)
18 (15.5)
17.5 (15)
18 (15.5)
17 (14.5)
16 (13.5)
242
17.5 (15)
17 (14.5)
17.5 (15)
17 (14.5)
17.5 (15)
16.5 (14)
15.5 (13)
470
17.5 (15)
17 (14.5)
16 (13.5)
15 (12.5)
Table 10.
Effective Resolution (Bits) vs. Gain and Output Update Rate for the AD7795 Using an Internal 1.17 V Reference with Chop Enabled
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 (15.5)
16.7
16 (16)
16 (15)
33.2
16 (16)
16 (15.5)
16 (14.5)
62
16 (16)
16 (15.5)
16 (14.5)
123
16 (16)
16 (15.5)
16 (16)
16 (15.5)
16 (15)
16 (15.5)
16 (14.5)
16 (13.5)
242
16 (15)
16 (14.5)
16 (15)
16 (14.5)
16 (15)
16 (14)
15.5 (13)
470
16 (15)
16 (14.5)
16 (13.5)
15 (12.5)
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