- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄165354 > ADS8517IDW (TEXAS INSTRUMENTS INC) 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO28 PDF資料下載
參數(shù)資料
| 型號(hào)： | ADS8517IDW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO28 |
| 封裝： | GREEN, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 21/38頁 |
| 文件大?。?/td> | 948K |
| 代理商： | ADS8517IDW |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁
APPLICATION INFORMATION
TRANSITION NOISE
7FFD
7FFE
16
288
7FFF
3855
8000
7740
8001
8002
4230
247
8003
8
AVERAGING
SLAS527A – SEPTEMBER 2008 – REVISED JUNE 2009 ................................................................................................................................................. www.ti.com
Apply a dc input to the ADS8517 and initiate 1000 conversions. The digital output of the converter varies in
output codes because of the internal noise of the ADS8517. This variance is true for all 16-bit SAR converters.
The transition noise specification found in the Electrical Characteristics section is a statistical figure that
represents the one sigma limit or rms value of these output codes.
Using a histogram to plot the output codes, the distribution should appear bell-shaped, with the peak of the bell
curve representing the nominal output code for the input voltage value. The ±1
σ, ±2σ, and ±3σ distributions
represent 68.3%, 95.5%, and 99.7%, respectively, of all codes. Multiplying the transition noise (TN) by 6 yields
the ±3
σ distribution, or 99.7%, of all codes. Statistically, up to three codes could fall outside the five-code
distribution when executing 1000 conversions. The ADS8517 has a TN of 0.8 LSBs, which yields five output
codes for a ±3
σ distribution. Figure 43 shows 16,384 conversion histogram results.
Figure 43. Histogram of 16,384 Conversions with VIN = 0 V in ±10 V Bipolar Range
The noise of the converter can be compensated by averaging the digital codes. By averaging conversion results,
transition noise is reduced by a factor of 1/
√n where n is the number of averages. For example, averaging four
conversion results reduces the TN by 1/2 to 0.4 LSBs. Averaging should only be used for input signals with
frequencies near dc.
For ac signals, a digital filter can be used to low-pass filter and decimate the output codes. This action works in a
similar manner to averaging: for every decimation by 2, the signal-to-noise ratio improves by 3 dB.
28
Copyright 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): ADS8517
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADS8517IPWR | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PDSO28 |
| ADS8519IRHBR | 3-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC32 |
| ADSP-21060LCWZ-160 | 48-BIT, 40 MHz, OTHER DSP, CQFP240 |
| ADSP-TS101SKB2250X | 64-BIT, 125 MHz, OTHER DSP, PBGA484 |
| ADT70GR-REEL7 | ANALOG TEMP SENSOR-VOLTAGE, 2.49-2.51V, 1Cel, RECTANGULAR, SURFACE MOUNT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS8517IDWG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16B,5V,125KSPS,ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS8517IDWR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low Power 16-Bit 200 kSPS ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS8517IDWRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16B,5V,125KSPS,ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS8517IPW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Lo Pwr 16B 200kSPS +/-10V Bip InSAR ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS8517IPWR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Lo Pwr 16B 200kSPS +/-10V Bip InSAR ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。