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參數(shù)資料
| 型號(hào)： | 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)： | 12/26頁 |
| 文件大?。?/td> | 329K |
| 代理商： | ADS7891 |
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SLAS410 DECEMBER 2003
www.ti.com
12
t(acq) + 60 ns
A_PWD
BUSY
SAMPLE
(Internal)
NAP
(Internal Active High)
NOTE:The SAMPLE (Internal) signal is generated as described in the Sampling and Conversion
Start section.
Figure 10. Device Operation While A_PWD is Toggling
POWERDOWN/RESET
A low level on the
PWD/RST
pin puts the device in the powerdown phase. This is an asynchronous signal. As
shown in Figure 11, the device is in the reset phase for the first t
w6
period after a high-to-low transition of
PWD/RST.
During this period the output code is 3F80 (hex) to indicate that the device is in the reset phase. The
device powers down if the
PWD/RST
pin continues to be low for a period of more than t
w7
. Data is not valid for
the first four conversions after a power-up (see Figure 11) or an end of reset (see Figure 12). The device is
initialized during the first four conversions.
Power Down
Phase
11 1111 1000 0000
1
2
3
4
5
PWD/RST
BUSY
D13D0
td13
tw7
First 4 Invalid Conversions
Valid Conversions
RESET Phase
Invalid Data
Valid Data
Figure 11. Device Power Down
11 1111 1000 0000
1
2
3
4
5
PWD/RST
BUSY
D13D0
tw6
First 4 Invalid Conversions
Valid Conversions
RESET Phase
Invalid Data
Valid Data
45 ns
Figure 12. Device Reset
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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(píng)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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