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| 型號： | AD7734BRU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 4-Channel, +-10 V Input Range, High Throughput, 24-Bit sigma ∆ ADC |
| 中文描述： | 4-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28 |
| 封裝： | MO-153AE, TSSOP-28 |
| 文件頁數(shù)： | 11/32頁 |
| 文件大?。?/td> | 1542K |
| 代理商： | AD7734BRU |
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AD7734
Chopping Disabled
Rev. 0 | Page 11 of 32
The second mode, in which the AD7734 is configured with
chopping disabled (CHOP = 0), provides faster conversion time
while still maintaining high resolution. Table 7 to Table 9 show
the –3 dB frequencies and typical performance versus the
channel conversion time and equivalent output data rate,
respectively. Table 7 shows the typical output rms noise. Table 8
shows the typical effective resolution based on the rms noise.
Table 9 shows the typical output peak-to-peak resolution,
representing values for which there will be 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 7. Typical Output RMS Noise in μV vs. Conversion Time and Input Range with Chopping Disabled
FW
Conversion Time
Register
(μs)
(Hz)
Conversion Time
Output Data Rate
–3 dB Frequency
(Hz)
RMS Noise
(μV)
127
92
44
35
16
7Fh
5Ch
2Ch
23h
10h
08h
03h
1357
992
492
398
200
117
65
737
1008
2032
2511
4991
8545
15398
670
920
1850
2290
2500
7780
14000
13.2
15.5
22.7
26.3
39.0
57.0
132
8
3
Table 8. Typical Effective Resolution in Bits vs. Conversion Time and Input Range with Chopping Disabled
FW
Conversion Time
Register
(μs)
(Hz)
Input Range/Effective Resolution (Bits)
Conversion Time
Output Data Rate
–3 dB Frequency
(Hz)
±10 V
20.5
20.3
19.7
19.5
19.0
18.4
17.2
0 V to +10 V
19.5
19.3
18.7
18.5
18.0
17.4
16.2
±5 V
19.5
19.3
18.7
18.5
18.0
17.4
16.2
0 V to +5 V
18.5
18.3
17.7
17.5
17.0
16.4
15.2
127
92
44
35
16
7Fh
5Ch
2Ch
23h
10h
08h
03h
1357
992
492
398
200
117
65
737
1008
2032
2511
4991
8545
15398
670
920
1850
2290
2500
7780
14000
8
3
Table 9. Typical Peak-to-Peak Resolution in Bits vs. Conversion Time and Input Range with Chopping Disabled
FW
Conversion Time
Register
(μs)
(Hz)
Input Range/Peak-to-Peak Resolution (Bits)
Conversion Time
Output Data Rate
–3 dB Frequency
(Hz)
±10 V
17.6
17.4
16.8
16.6
16.1
15.5
14.3
0 V to +10 V
16.6
16.4
15.8
15.6
15.1
14.5
13.3
±5 V
16.6
16.4
15.8
15.6
15.1
14.5
13.3
0 V to +5 V
15.6
15.4
14.8
14.6
14.1
13.5
12.3
127
92
44
35
16
7Fh
5Ch
2Ch
23h
10h
08h
03h
1357
992
492
398
200
117
65
737
1008
2032
2511
4991
8545
15398
670
920
1850
2290
2500
7780
14000
8
3
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