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參數資料
| 型號： | AD7890AR-2 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | Circular Connector Cable Assembly; Connector Type A:Circular Receptacle; Connector Type B:Stripped End Leads; Cable Length:10ft; Features:500 Mating Cycles, PVC Jacket, IP67 Rating, E63093 Rated Connector; No. of Contacts:6 RoHS Compliant: Yes |
| 中文描述： | 8-CH 12-BIT PROPRIETARY METHOD ADC, SERIAL ACCESS, PDSO24 |
| 封裝： | MS-013AD, SOIC-24 |
| 文件頁數： | 19/20頁 |
| 文件大小： | 302K |
| 代理商： | AD7890AR-2 |
AD7890
–19–
REV. A
E ffective Number of Bits
T he formula for Signal to (Noise + Distortion) Ratio (See T er-
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
T he 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. T he sampling
frequency is 102.4 kHz. T he 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.
12
10
0
40
11.5
10.5
11
20
E
INPUT FREQUENCY – kHz
Figure 21. Effective Number of Bits vs. Frequency
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| AD7890SQ-10 | 20 Characters x 4 Lines, 5x7 Dot Matrix Character and Cursor |
| AD7890SQ-2 | 20 Characters x 4 Lines, 5x7 Dot Matrix Character and Cursor |
| AD7890SQ-4 | 20 Characters x 4 Lines, 5x7 Dot Matrix Character and Cursor |
| AD7890AN-2 | Explosion-Proof Limit Switches Series CX: Standard Housing: Side Rotary, Lever not included |
| AD7890AN-4 | Explosion-Proof Limit Switches Series CX: Standard Housing: Side Rotary, Lever not included |
相關代理商/技術參數 |
參數描述 |
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| AD7890AR-2REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 117ksps 12-bit Serial 24-Pin SOIC W T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 117KSPS 12-BIT SERL 24SOIC W - Tape and Reel |
| AD7890AR-4 | 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - ADCs/DAC - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數據采集系統（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數據接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數字 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 |
| AD7890AR-4REEL | 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - ADCs/DAC - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數據采集系統（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數據接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數字 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 |
| AD7890ARZ-10 | 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - ADCs/DAC - 專用型 系列:- 產品培訓模塊:Data Converter Basics 標準包裝:1 系列:- 類型:電機控制 分辨率（位）:12 b 采樣率（每秒）:1M 數據接口:串行，并聯 電壓電源:單電源 電源電壓:2.7 V ~ 3.6 V，4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:100-TQFP 供應商設備封裝:100-TQFP（14x14） 包裝:剪切帶 (CT) 其它名稱:296-18373-1 |
| AD7890ARZ-10REEL | 功能描述:IC DAS 12BIT 8CH 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - ADCs/DAC - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數據采集系統（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數據接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數字 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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