參數(shù)資料
型號(hào): EVAL-AD7191EBZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 6/21頁(yè)
文件大小: 0K
描述: BOARD EVAL FOR AD7191
設(shè)計(jì)資源: EVAL-AD7191 Schematic
AD7191 Gerber Files
標(biāo)準(zhǔn)包裝: 1
ADC 的數(shù)量: 1
位數(shù): 24
采樣率(每秒): 120
數(shù)據(jù)接口: MICROWIRE?,QSPI?,串行,SPI?
輸入范圍: ±5 V
工作溫度: -40°C ~ 105°C
已用 IC / 零件: AD7191
已供物品:
AD7191
Rev. A | Page 13 of 20
RMS NOISE AND RESOLUTION SPECIFICATIONS
Table 5 shows the rms noise of the AD7191 for the four output
data rates and four gains. The numbers given are for an
external 5 V reference. These numbers are typical and are
generated with a differential input voltage of 0 V. Table 6
shows the effective resolution; 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, whereas
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 are rounded to
the nearest half-LSB.
The effective resolution (ENOB) is defined as
ENOB = log2 (Full-Scale Range/rms Noise)
The noise-free bits or p-p resolution is defined as
p-p Resolution = log2 (Full-Scale Range/p-p Noise)
where Full-Scale Range = 2 × VREF/Gain.
Table 5. RMS Noise (nV) vs. Gain and Output Data Rate Using a 5 V Reference
ODR2, ODR1
Output Data Rate (Hz)
Settling Time (ms)
Gain of 1
Gain of 8
Gain of 64
Gain of 128
11
10
400
490
85
17
15
10
50
80
2000
260
46
34
01
60
66.7
2100
273
48
38
00
120
33.3
2400
315
64
51
Table 6. Typical Resolution (Bits) vs. Gain and Output Update Rate Using a 5 V Reference
ODR2, ODR1
Output Data Rate (Hz)
Settling Time (ms)
Gain of 1
Gain of 8
Gain of 64
Gain of 128
11
10
400
24 (21.5)
23.5 (21)
23 (20.5)
22 (19.5)
10
50
80
22 (19.5)
21.5 (19)
20.5 (18)
01
60
66.7
22 (19.5)
21.5 (19)
20.5 (18)
00
120
33.3
22 (19.5)
21.5 (19)
21 (18.5)
20 (17.5)
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