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(yè)數(shù)： 10/26頁(yè)
文件大?。?/td> 329K
代理商： ADS7891
SLAS410 DECEMBER 2003
www.ti.com
10
D136 & D50 D50
Conversion No N
Data For Conv. N
Data For Conv. N1
CS
CONVST
BUSY
D13D0
td1 + t(acq)
BYTE
t2
td10
td7
td8
td2
Figure 6. Read Control Via CS and RD Tied to BDGND
DEVICE OPERATION AND DATA READ IN BACK-TO-BACK CONVERSION
The following two figures illustrate device operation in back-to-back conversion mode. It is possible to operate
the device at any throughput in this mode, but this is the only mode in which the device can be operated at
throughputs exceeding 2.8 MSPS.
A conversion starts on the CONVST
falling edge. The BUSY output goes high after a delay (t
d2
). Note that care
must be taken not to abort the conversion (see Figure 4) apart from timing restrictions shown in Figure 7 and
Figure 8. The conversion ends within the conversion time, t
(conv)
, after the
CONVST
falling edge. The new
acquisition can be immediately started without waiting for the BUSY signal to go low. This can be ensured with
a
CONVST
high pulse width that is more than or equal to (t
0
– t
(conv)
+ 10 nsec) which is t
w4
for a 3-MHz operation.
Sample N
Conversion N
Data For Conversion N1
(Data read Without Latency)
CONVST
BUSY
D13D0
t(conv) + td11
tw4
t(acq)
tw5
td12
t0 = 333 ns for 3 MSPS Operation
Figure 7. Back-To-Back Operation With CS and RD 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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