参数资料
型号: EVAL-AD7739EBZ
厂商: Analog Devices Inc
文件页数: 4/32页
文件大小: 0K
描述: BOARD EVAL FOR AD7739
标准包装: 1
ADC 的数量: 1
位数: 24
采样率(每秒): 15.1k
数据接口: 串行
输入范围: ±2.5 V
在以下条件下的电源(标准): 85mW @ 5V
工作温度: -40°C ~ 105°C
已用 IC / 零件: AD7739
已供物品:
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AD7739
Data Sheet
Rev. A | Page 12 of 32
CHOPPING DISABLED
The second mode, in which the AD7739 is configured with
chopping disabled (chop = 0), provides faster conversion time
while maintaining high resolution. Table 8 to Table 10 show the
3 dB frequencies and typical performance versus the channel
conversion time and equivalent output data rate, respectively.
Table 8 shows the typical output rms noise. Table 9 shows the
typical effective resolution based on the rms noise.
Table 10 shows the typical output peak-to-peak resolution,
representing values for which there is no code flicker within a
6-sigma limit. The peak-to-peak resolutions are not calculated
based on rms noise but on peak-to-peak noise.
These typical numbers are generated from 4096 data samples
acquired in continuous conversion mode with an analog input
voltage set to 0 V and MCLK = 6.144 MHz. The conversion
time is selected via the channel conversion time register.
Table 8. Typical Output RMS Noise in V vs. Conversion Time and Input Range with Chopping Disabled
FW
Conversion
Time
Register
Conversion
Time (s)
Output Data
Rate (Hz)
3 dB
Frequency
(Hz)
Input Range/RMS Noise (V)
±2.5 V, +2.5 V
±1.25 V, +1.25 V, ±0.625 V, +0.625 V
127
0x7F
1358
737
675
2.4
1.5
92
0x5C
993
1007
950
3.0
1.8
35
0x23
399
2504
2500
4.5
2.7
16
0x10
201
4963
5400
6.9
4.1
12
0x0C
160
6257
7250
9.6
5.3
11
0x0B
149
6693
7900
11.4
6.9
3
0x03
66
15133
29000
200
90
Table 9. Typical Effective Resolution in Bits vs. Conversion Time and Input Range with Chopping Disabled
FW
Conversion
Time
Register
Conversion
Time (s)
Output Data
Rate (Hz)
3 dB
Frequency
(Hz)
Input Range/Effective Resolution (Bits)
±2.5 V
+2.5 V
±1.25 V
+1.25 V ±0.625 V +0.625 V
127
0x7F
1358
737
675
21.0
20.0
20.6
19.6
18.6
92
0x5C
993
1007
950
20.7
19.7
20.4
19.4
18.4
35
0x23
399
2504
2500
20.1
19.1
19.8
18.8
17.8
16
0x10
201
4963
5400
19.4
18.4
19.2
18.2
17.2
12
0x0C
160
6257
7250
18.9
17.9
18.8
17.8
16.8
11
0x0B
149
6693
7900
18.8
17.8
18.5
17.5
16.5
3
0x03
66
15133
29000
14.6
13.6
14.7
13.7
12.7
Table 10. Typical Peak-to-Peak Resolution in Bits vs. Conversion Time and Input Range with Chopping Disabled
FW
Conversion
Time
Register
Conversion
Time (s)
Output Data
Rate (Hz)
3 dB
Frequency
(Hz)
Input Range/Peak-to-Peak Resolution (Bits)
±2.5 V
+2.5 V
±1.25 V
+1.25 V ±0.625 V +0.625 V
127
0x7F
1358
737
675
18.2
17.2
17.8
16.8
15.8
92
0x5C
993
1007
950
17.8
16.8
17.6
16.6
15.6
35
0x23
399
2504
2500
17.2
16.2
17.0
16.0
15.0
16
0x10
201
4963
5400
16.6
15.6
16.4
15.4
14.4
12
0x0C
160
6257
7250
16.1
15.1
16.0
15.0
14.0
11
0x0B
149
6693
7900
16.0
15.0
15.7
14.7
13.7
3
0x03
66
15133
29000
11.7
10.7
12.0
11.0
10.0
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