參數(shù)資料
型號(hào)： EVAL-AD7715-5EB
廠商： Analog Devices, Inc.
英文描述： 3 V/5 V, 450 uA 16-Bit, Sigma-Delta ADC
中文描述： 3伏/ 5伏，450微安16位Σ-Δ模數(shù)轉(zhuǎn)換器
文件頁(yè)數(shù)： 13/31頁(yè)
文件大?。?/td> 474K
代理商： EVAL-AD7715-5EB
AD7715
–13–
REV. C
AD7715-3
Table IX shows the AD7715-3 output rms noise for the selectable notch and –3dB frequencies for the part, as selected by FS1 and
FS0 of the Setup Register. The numbers given are for the bipolar input ranges with a V
REF
of +1.25V. These numbers are typical
and are generated at an analog input voltage of 0V with the part used in unbuffered mode (BUF bit of the Setup Register = 0).
Table X meanwhile shows the output
peak-to-peak
noise for the selectable notch and –3dB frequencies for the part.
It is important to
note that these numbers represent the resolution for which there will be no code flicker. They are not calculated based on rms noise but on peak-
to-peak noise
. The numbers given are for the bipolar input ranges with a V
REF
of +1.25V and for the BUF bit of the Setup Register =
0. These numbers are typical, are generated at an analog input voltage of 0V and are rounded to the nearest LSB.
Meanwhile, Table XI and Table XII show rms noise and peak-to-peak resolution respectively with the AD7715-3 operating under
the same conditions as above except that now the part is operating in buffered mode (BUF Bit of the Setup Register = 1).
Table IX. Output RMS Noise vs. Gain and Output Update Rate for AD7715-3 (Unbuffered Mode)
Filter First Notch & O/P Data Rate
–3dB Frequency
Typical Output RMS Noise in
m
V
MCLK IN =
2.4576 MHz
MCLK IN =
1 MHz
MCLK IN =
2.4576 MHz
MCLK IN =
1 MHz
GAIN = 1
GAIN = 2
GAIN = 32
GAIN = 128
50Hz
60Hz
250Hz
500Hz
20Hz
25Hz
100Hz
200Hz
13.1Hz
15.72Hz
65.5Hz
131Hz
5.24Hz
6.55Hz
26.2Hz
52.4Hz
3.0
3.4
45
270
1.7
2.1
20
135
0.7
0.7
2.2
9.7
0.65
0.7
1.6
3.3
Table X. Peak-to-Peak Resolution vs. Gain and Output Update Rate for AD7715-3 (Unbuffered Mode)
Filter First Notch & O/P Data Rate
–3dB Frequency
Typical Peak-to-Peak Resolution in Bits
MCLK IN =
2.4576 MHz
MCLK IN =
1 MHz
MCLK IN =
2.4576 MHz
MCLK IN =
1 MHz
GAIN = 1
GAIN = 2
GAIN = 32
GAIN = 128
50Hz
60Hz
250Hz
500Hz
20Hz
25Hz
100Hz
200Hz
13.1Hz
15.72Hz
65.5Hz
131Hz
5.24Hz
6.55Hz
26.2Hz
52.4Hz
16
16
13
11
16
16
13
11
14
14
13
10
12
12
11
10
Table XI. Output RMS Noise vs. Gain and Output Update Rate for AD7715-3 (Buffered Mode)
Filter First Notch & O/P Data Rate
–3dB Frequency
Typical Output RMS Noise in
m
V
MCLK IN =
2.4576 MHz
MCLK IN =
1 MHz
MCLK IN =
2.4576 MHz
MCLK IN =
1 MHz
GAIN = 1
GAIN = 2
GAIN = 32
GAIN = 128
50Hz
60Hz
250Hz
500Hz
20Hz
25Hz
100Hz
200Hz
13.1Hz
15.72Hz
65.5Hz
131Hz
5.24Hz
6.55Hz
26.2Hz
52.4Hz
4.5
5.1
50
270
2.4
2.9
25
135
0.9
0.9
2.6
9.7
0.9
1.0
2
3.3
Table XII. Peak-to-Peak Resolution vs. Gain and Output Update Rate for AD7715-3 (Buffered Mode)
Filter First Notch & O/P Data Rate
–3dB Frequency
Typical Peak-to-Peak Resolution in Bits
MCLK IN =
2.4576 MHz
MCLK IN =
1 MHz
MCLK IN =
2.4576 MHz
MCLK IN =
1 MHz
GAIN = 1
GAIN = 2
GAIN = 32
GAIN = 128
50Hz
60Hz
250Hz
500Hz
20Hz
25Hz
100Hz
200Hz
13.1Hz
15.72Hz
65.5Hz
131Hz
5.24Hz
6.55Hz
26.2Hz
52.4Hz
16
16
13
10
16
16
13
11
14
14
12
10
12
12
11
10
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