參數(shù)資料
型號： ADS7891
英文描述： CMOS Hex Schmitt Triggers 14-SO -55 to 125
中文描述： 3 MSPS的14位低功耗的SAR模數(shù)轉(zhuǎn)換器
文件頁數(shù)： 9/26頁
文件大小： 329K
代理商： ADS7891
SLAS410 DECEMBER 2003
www.ti.com
9
CONVERSION ABORT
The falling edge of CS aborts the conversion while BUSY is high and CONVST is high (see Figure 4). The device
outputs 3F80 (hex) to indicate a conversion abort.
11 1111 1000 0000
td5
CS
CONVST
BUSY
tsu1
RD
D13D0
Figure 4. Conversion Abort
DATA READ
Two conditions need to be satisfied for a read operation. Data appears on the D13 through D0 pins (with D13
MSB) when both CS and RD are low. Figure 5 and Figure 6 illustrate the device read operation. The bus is
three-stated if any one of the signals is high.
D136 & D50 D50
tw5
CS
CONVST
BUSY
D13D0
td2
td1 + t(acq)
t(conv)
td11
td6
td7
td9
BYTE
t1
RD
Figure 5. Read Control Via CS and RD
There are two output formats available. Fourteen bit data appears on the bus during a read operation while
BYTE is low. When BYTE is high, the lower byte (D5 through D0 followed by all zeroes) appears on the data
bus with D5 in the MSB. This feature is useful for interfacing with eight bit microprocessors and microcontrollers.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS7891EVM 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS7891 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
ADS7891IPFBR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7-5.25V Digital 5V Analog 14 Bit 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
ADS7891IPFBRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7-5.25V Digital 5V Analog 14 Bit 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
ADS7891IPFBT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7-5.25V Digital 5V Analog 14 Bit 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
ADS7891IPFBTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7-5.25V Digital 5V Analog 14 Bit 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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