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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)： | 11/26頁 |
| 文件大?。?/td> | 329K |
| 代理商： | ADS7891 |
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SLAS410 DECEMBER 2003
www.ti.com
11
Sample N
Conversion N
Data For Conversion N1
(Data read Without Latency)
CONVST
BUSY
D13D0
t(conv) + td11
tw4
tw3
t(acq)
t0 = 333 ns for 3 MSPS Operation
th1
CS
td12
Figure 8. Back-To-Back operation With CS Toggling and RD Low
NAP MODE
The device can be put in nap mode following the sequences shown in Figure 9. This provides substantial power
saving while operating at lower sampling rates.
While operating the device at throughput rates lower than 2.54 MSPS, A_PWD
can be held low (see Figure 9).
In this condition, the device goes into the nap state immediately after BUSY goes low and remains in that state
until the next sampling starts. The minimum acquisition time is 60 nsec more than t
(acq)
as defined in the timing
requirements section.
Alternately,
A_PWD
can be toggled any time during operation (see Figure 10). This is useful when the system
acquires data at the maximum conversion speed for some period of time (back-to-back conversion) and it does
not acquire data for some time while the acquired data is being processed. During this period, the device can
be put in the nap state to save power. The device remains in the nap state as long as
A_PWD
is low with BUSY
being low and sampling has not started. The minimum acquisition time for the first sampling after the nap state
is 60 nsec more than t
(acq)
as defined in the timing requirements section.
A_PWD
(Held Low)
BUSY
SAMPLE
(Internal)
NAP
(Internal Active High)
t(acq) + 60 ns
NOTE:The SAMPLE (Internal) signal is generated as described in the Sampling and Conversion
Start section.
Figure 9. Device Operation While A_PWD is Held Low
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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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