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)： 6/38頁
文件大小： 948K
代理商： ADS8517IDW
STARTING A CONVERSION
SLAS527A – SEPTEMBER 2008 – REVISED JUNE 2009 ................................................................................................................................................. www.ti.com
The combination of CS (pin 23) and R/C (pin 22) held low for a minimum of 40 ns puts the sample-and-hold of
the ADS8517 in the hold state and starts conversion N. BUSY (pin 24) goes low and stays low until conversion N
completes and the internal output register has been updated. All new convert commands received while BUSY is
low are ignored.
The ADS8517 begins tracking the input signal at the end of the conversion. Allowing 5
s between convert
commands assures accurate acquisition of a new signal. Refer to Table 2 and Table 3 for a summary of CS,
R/C, and BUSY states, and Figure 30 through Figure 36 for timing diagrams.
Table 2. Control Functions When Using Parallel Output (DATACLK Tied Low, EXT/INT Tied High)
CS
R/C
BUSY
OPERATION
1
X
None. Data bus is in High-Z state.
↓
0
1
Initiates conversion N. Data bus remains in High-Z state.
0
↓
1
Initiates conversion N. Data bus enters High-Z state.
0
1
↑
Conversion N completed. Valid data from conversion N on the data bus.
↓
1
Enables data bus with valid data from conversion N.
↓
1
0
Enables data bus with valid data from conversion N–1(1). Conversion N in progress.
0
↑
0
Enables data bus with valid data from conversion N–1(1). Conversion N in progress.
0
↑
New conversion initiated without acquisition of a new signal. Data are invalid. CS and/or R/C
must be high when BUSY goes high.
X
0
New convert commands ignored. Conversion N in progress.
(1)
See Figure 30 and Figure 31 for constraints on data valid from conversion N–1.
CS and R/C are internally ORed and level-triggered. It does not matter which input goes low first when initiating a
conversion. If, however, it is critical that CS or R/C initiates conversion N, be sure the less critical input is low at
least tsu2 ≥ 10 ns before the initiating input. If EXT/INT (pin 8) is low when initiating conversion N, serial data from
conversion N–1 is output on SDATA (pin 19) following the start of conversion N. See Internal Data Clock in the
Reading Data section for more information.
To reduce the number of control pins, CS can be tied low using R/C to control the read and convert modes. This
configuration has no effect when using the internal data clock in the serial output mode. However, when using an
active external data clock, the parallel and serial outputs are affected whenever R/C goes high; refer to the
Reading Data section for more information. In the internal clock mode, data are clocked out every convert cycle
regardless of the states of CS and R/C. The conversion result is available as soon as BUSY returns to high.
Therefore, data always represent the previously-completed conversion, even when read during a conversion.
14
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)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*