參數(shù)資料
型號： ADS8506I
英文描述： 12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
中文描述： 12位40 kSPS的低功耗采樣模擬到數(shù)字轉(zhuǎn)換的內(nèi)部基準(zhǔn)，并行/串行接口
文件頁數(shù)： 27/28頁
文件大?。?/td> 426K
代理商： ADS8506I
www.ti.com
APPLICATION INFORMATION
AVERAGING
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/
√
Hz where n is the number of averages. For example, averaging four
conversion results reduces the TN by to 0.4 LSBs. Averaging should only be used for input signals with
frequencies near DC.
QSPI INTERFACE
Figure 48
shows a simple interface between the ADS8506 and any QSPI equipped microcontroller. This interface
assumes that the convert pulse does not originate from the microcontroller and that the ADS8506 is the only
serial peripheral.
R/C
BUSY
SDATA
DATACLK
CS
EXT/INT
BYTE
PCS0/SS
MOSI
SCK
QSPI
ADS8506
Convert Pulse
CPOL = 0 (Inactive State is LOW)
CPHA = 1 (Data Valid on Falling Edge)
QSPI Port is in Slave Mode.
SPI INTERFACE
ADS8506
SLAS484A–SEPTEMBER 2007–REVISED OCTOBER 2007
For AC signals, a digital filter can be used to low-pass filter and decimate the output codes. This works in a
similar manner to averaging: for every decimation by 2, the signal-to-noise ratio improves 3 dB.
Figure 48. QSPI Interface to the ADS8506
Before enabling the QSPI interface, the microcontroller must be configured to monitor the slave select line. When
a transition from low to high occurs on slave select (SS) from BUSY (indicating the end of the current
conversion), the port can be enabled. If this is not done, the microcontroller and the A/D converter may be
out-of-sync
.
The SPI interface is generally only capable of 8-bit data transfers. For some microcontrollers with SPI interfaces,
it might be possible to receive data in a similar manner as shown for the QSPI interface in
Figure 48
. The
microcontroller needs to fetch the 8 most significant bits before the contents are overwritten by the least
significant bits.
Copyright 2007, Texas Instruments Incorporated
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Product Folder Link(s):
ADS8506
相關(guān)PDF資料
PDF描述
ADS8506IB 12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8506IBDW 12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8506IBDWR 12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8506IDW 12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8506IDWR 12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS8506IB 制造商:BB 制造商全稱:BB 功能描述:12-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE
ADS8506IBDW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12B 40KSPS 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
ADS8506IBDWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12B 80KSPS Lo Pwr Int Ref 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
ADS8506IBDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12B 40KSPS 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
ADS8506IBDWRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12B 80KSPS Lo Pwr Int Ref 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
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