參數(shù)資料
型號： AD7714ARZ-3
廠商： Analog Devices Inc
文件頁數(shù)： 5/40頁
文件大小： 0K
描述： IC ADC 24BIT SIGMA-DELTA 24SOIC
標(biāo)準(zhǔn)包裝： 31
位數(shù)： 24
采樣率（每秒）： 1k
數(shù)據(jù)接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 7mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 24-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 24-SOIC W
包裝： 管件
輸入數(shù)目和類型： 3 個差分，單極；3 個差分，雙極；5 個偽差分，單極；5 個偽差分，雙極
配用： EVAL-AD7714-3EBZ-ND - BOARD EVAL FOR AD7714
2
AD7714
REV. C
–13–
BUFFERED MODE NOISE
Table III shows the typical output rms noise and effective resolution for some typical notch and –3 dB frequencies for the AD7714-
5 with fCLK IN = 2.4576 MHz and BUFFER = +5 V. Table IV gives the information for the AD7714-3 again with fCLK IN = 2.4576
MHz and BUFFER = +5 V. The numbers given are for the bipolar input ranges and are generated with a differential analog input
voltage of 0 V. For the AD7714-5, the VREF voltage is +2.5 V while for the AD7714 the VREF voltage is +1.25 V. The numbers in
brackets in each table are for the effective resolution of the part (rounded to the nearest 0.5 LSB). The effective resolution of the
device is defined as the ratio of the output rms noise to the input full scale (i.e., 2
× V
REF/GAIN). It should be noted that it is not
calculated using peak-to-peak output noise numbers. Peak-to-peak noise numbers can be up to 6.6 times the rms numbers while
effective resolution numbers based on peak-to-peak noise can be 2.5 bits below the effective resolution based on rms noise as quoted
in the tables.
Table III. AD7714-5 Buffered Mode Output Noise/Resolution for fCLK IN = 2.4576 MHz
Filter First
Typical Output RMS Noise in
V (Effective Resolution in Bits)
Notch & O/P
–3 dB
Gain of
Data Rate
Frequency
1
2
4
8
16
32
64
128
5 Hz
1.31 Hz
0.99
(22.5)
0.68
(22)
0.46 (21.5) 0.26 (21)
0.26 (20)
0.26 (19)
0.26 (18)
0.26 (17)
10 Hz
2.62 Hz
1.5
(21.5)
0.95
(21.5)
0.63 (21)
0.41 (20.5) 0.39 (19.5) 0.36 (18.5) 0.36 (17.5) 0.36 (16.5)
25 Hz
6.55 Hz
2.5
(21)
1.7
(20.5)
0.88 (20.5) 0.75 (19.5) 0.57 (19)
0.57 (18)
0.57 (17)
0.56 (16)
30 Hz
7.86 Hz
2.9
(20.5)
1.8
(20.5)
1
(20)
0.87 (19.5) 0.75 (18.5) 0.72 (17.5) 0.72 (16.5) 0.71 (15.5)
50 Hz
13.1 Hz
4.2
(20)
2.5
(20)
1.5
(19.5) 1.1
(19)
0.94 (18.5) 0.94 (17.5) 0.94 (16.5) 0.87 (15.5)
60 Hz
15.72 Hz
6.1
(19.5)
2.9
(19.5)
2
(19.5) 1.2
(19)
1
(18.5) 0.97 (17.5) 0.95 (16.5) 0.94 (15.5)
100 Hz
26.2 Hz
13.8
(18.5)
6.5
(18.5)
3.5
(18.5) 2.2
(18)
1.3
(18)
1.2
(17)
1.3
(16)
1.1
(15)
250 Hz
65.5 Hz
87
(16)
56
(15.5)
25
(15.5) 11
(15.5) 5.7
(15.5) 3.6
(15.5) 2.4
(15)
2.1
(14)
500 Hz
131 Hz
508
(13.5)
241
(13.5)
117 (13.5) 73
(13)
34
(13)
16
(13)
8.5
(13)
5.2
(13)
1 kHz
262 Hz
2860 (11)
1700 (10.5)
745 (10.5) 480 (10.5) 197 (10.5) 94
(10.5) 53
(10.5) 23
(10.5)
Table IV. AD7714-3 Buffered Mode Output Noise/Resolution for fCLK IN = 2.4576 MHz
Filter First
Typical Output RMS Noise in
V (Effective Resolution in Bits)
Notch & O/P
–3 dB
Gain of
Data Rate
Frequency
1
2
4
8
16
32
64
128
5 Hz
1.31 Hz
1.16
(21)
0.76
(20.5)
0.34 (20)
0.29 (20)
0.29 (19)
0.28 (18)
0.26 (17)
0.26 (16)
10 Hz
2.62 Hz
1.7
(20.5)
1
(20.5)
0.7
(20)
0.46 (19.5) 0.45 (18.5) 0.4
(17.5) 0.4
(16.5) 0.4
(15.5)
25 Hz
6.55 Hz
3.5
(19.5)
1.8
(19.5)
1.1
(19)
0.74 (18.5) 0.63 (18)
0.6
(17)
0.6
(16)
0.6
(15)
30 Hz
7.86 Hz
3.7
(19.5)
2.2
(19)
1.3
(19)
0.76 (18.5) 0.68 (18)
0.66 (17)
0.66 (16)
0.66 (15)
50 Hz
13.1 Hz
4.5
(19)
3
(18.5)
1.7
(18.5) 1.0
(18)
0.92 (17.5) 0.9
(16.5) 0.89 (15.5) 0.89 (14.5)
60 Hz
15.72 Hz
5.3
(19)
3.3
(18.5)
1.8
(18.5) 1.1
(18)
1
(17)
0.96 (16.5) 0.96 (15.5) 0.96 (14.5)
100 Hz
26.2 Hz
10
(18)
4.9
(18)
3.1
(17.5) 1.5
(17.5) 1.2
(17)
1.2
(16)
1.2
(15)
1.2
(14)
250 Hz
65.5 Hz
47
(15.5)
29
(15.5)
15
(15.5) 7.5
(15.5) 4.7
(15)
2.6
(15)
2.5
(14)
1.6
(13.5)
500 Hz
131 Hz
300
(13.5)
171
(13)
74
(13)
35
(13)
21
(13)
8.6
(13)
5.6
(13)
3.1
(12.5)
1 kHz
262 Hz
1722 (10.5)
735
(10.5)
380 (10.5) 230 (10.5) 93
(10.5) 55
(10.5) 30
(10.5) 12
(10.5)
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