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參數(shù)資料
| 型號： | ADS7870EA |
| 英文描述： | 12-Bit ADC, MUX, PGA and Internal Reference DATA ACQUISITION SYSTEM |
| 中文描述： | 12位ADC，復(fù)用器，PGA和內(nèi)部基準(zhǔn)數(shù)據(jù)采集系統(tǒng) |
| 文件頁數(shù)： | 21/27頁 |
| 文件大?。?/td> | 262K |
| 代理商： | ADS7870EA |
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ADS7870
|||{
{
|
A0
A1
A2
A3
A4
0
1
0
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
Micro drives DIN
ADS7870 drives DIN
DIN high-impedance on inactive edge
SCLK
DIN
DOUT
CS
FIGURE 9. Timing for High Impedance State on DIN/DOUT (Inactive SCLK edge).
{
|||{
A0
A1
A2
A3
A4
0
1
0
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
SCLK
DIN
DOUT
CS
Micro drives DIN
ADS7870 drives DIN
DIN high-impedance on CS
FIGURE 8. Timing for High Impedance State on DIN/DOUT (CS = “1”).
Figures 8 and 9 show the timing of when the ADS7870 will
set the DIN pin to high impedance mode at the end of a read
operation when the 2W bit is set. The behavior of DOUT
does not depend of the state of 2W. The 8051 bit is not set
for these two examples.
Figure 10 shows the timing for entering the high impedance
state when the 8051 bit is set. Notice that on the last bit of
the read operation the DIN (and DOUT) pin goes to the high
impedance state on the active edge of SCLK instead of
waiting for the inactive edge of SCLK or CS going high as
shown in Figures 8 and 9. This is for compatibility with
80C51 Mode 0 type serial interfaces. An 80C51 forces DIN
valid before the SCLK falling edge and holds it valid until
after the SCLK rising edge. This can lead to contention but
setting the 8051 bit fixes this potential problem without
requiring CS to be toggled high after every read operation.
|||{
A0
A1
A2
A3
A4
0
1
0
D0
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
Micro drives DIN
ADS7870 drives DIN
DIN high-impedance on active SCLK edge
SCLK
DIN
DOUT
CS
FIGURE 10. Timing for High Impedance State on DIN/DOUT (8051 bit = “1”).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS7870EA/1K | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit ADC MUX PGA 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 |
| ADS7870EA/1KG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit ADC MUX PGA 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 |
| ADS7870EA/250 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog-to-Digital Converter， 12-Bit |
| ADS7870EAG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit ADC MUX PGA 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 |
| ADS7870EVM | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS7870 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 |
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