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參數(shù)資料
| 型號： | AD7890BN |
| 英文描述： | 450mA, Low Noise Current Mode Step-Down DC/DC Converter; Package: SSOP; No of Pins: 16; Temperature Range: -40°C to +85°C |
| 中文描述： | 立法會2馬鞍山8通道12位串行數(shù)據(jù)采集系統(tǒng)（191.20十一） |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 191K |
| 代理商： | AD7890BN |
REV. B
AD7890
–19–
INPUT FREQUENCY
–
kHz
0
E
12.0
11.5
11.0
10.5
10.0
20
40
Figure 21. Effective Number of Bits vs. Frequency
Effective Number of Bits
The formula for Signal to (Noise + Distortion) Ratio (See Ter-
minology section) is related to the resolution or number of bits
in the converter. Rewriting the formula, below, gives a measure
of performance expressed in effective number of bits (N):
N = (SNR —
1.76)/6.02
where
SNR
is Signal to (Noise + Distortion) Ratio
The effective number of bits for a device can be calculated
from its measured Signal to (Noise + Distortion) Ratio. Fig-
ure 21 shows a typical plot of effective number of bits versus
frequency for the AD7890-2 from dc to 40 kHz. The sampling
frequency is 102.4 kHz. The plot shows that the AD7890 con-
verts an input sine wave of 40 kHz to an effective numbers of
bits of 11 which equates to a Signal to (Noise + Distortion)
level of 68 dB.
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| AD7890BR | LC 2 MOS 8-Channel 12-Bit Serial Data Acquisition System(191.20 k) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7890BN-10 | 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| AD7890BN-2 | 制造商:Analog Devices 功能描述:ADC Single SAR 117ksps 12-bit Serial 24-Pin PDIP 制造商:Rochester Electronics LLC 功能描述:8-CH,100K,12-BIT ADC - Bulk |
| AD7890BN-4 | 制造商:Analog Devices 功能描述:ADC Single SAR 117ksps 12-bit Serial 24-Pin PDIP |
| AD7890BNZ-10 | 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| AD7890BNZ-2 | 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
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