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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)： | 5/26頁 |
| 文件大?。?/td> | 329K |
| 代理商： | ADS7891 |
SLAS410 DECEMBER 2003
www.ti.com
5
TIMING REQUIREMENTS
All specifications typical at 40
°
C to 85
°
C, +VA = +5 V, +VBD = +5 V (see Notes 1, 2, 3, and 4)
PARAMETER
Conversion time
Acquisition time
SAMPLING AND CONVERSION START
Hold time CS low to CONVST high (with BUSY high)
Delay CONVST high to acquisition start
Hold time, CONVST high to CS high with BUSY low
Hold time, CONVST low to CS high
Delay CONVST low to BUSY high
CS width for acquisition or conversion to start
Delay CS low to acquisition start with CONVST high
Pulse width, from CS low to CONVST low for acquisition to start
Delay CS low to BUSY high with CONVST low
Quiet sampling time(3)
CONVERSION ABORT
Setup time CONVST high to CS low with BUSY high
Delay time CS low to BUSY low with CONVST high
DATA READ
Delay RD low to data valid with CS low
Delay BYTE high to LSB word valid with CS and RD low
Delay time RD high to data 3-state with CS low
Delay time end of conversion to BUSY low
Quiet sampling time RD high to CONVST low
Delay CS low to data valid with RD low
Delay CS high to data 3-state with RD low
Quiet sampling time CS low to CONVST low
BACK-TO-BACK CONVERSION
Delay BUSY low to data valid
Pulse width, CONVST high
Pulse width, CONVST low
POWER DOWN/RESET
Pulse width, low for PWD/RST to reset the device
Pulse width, low for PWD/RST to power down the device
Delay time, power up after PWD/RST is high
(1)All input signals are specified with tr = tf = 5 ns (10% to 90% of +VBD) and timed from a voltage level of (VIL + VIH)/2.
(2)See timing diagram.
(3)Quiet period before conversion start, no data bus activity including data bus 3-state is allowed in this period.
(4)All timings are measured with 20 pF equivalent loads with 5 V +VBD and 10-pF equivalent loads with 3 V +VBD on all data bits and BUSY pin.
SYMBOL
t(conv)
t(acq)
MIN
TYP
255
78
MAX
273
UNITS
ns
ns
REF FIG.
5
5
60
th1
td1
th2
th3
td2
tw3
td3
tw1
td4
10
2
10
10
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3
1
1
1
1
2
2
2
2
4
5
40
20
2
20
4
5
40
25
tsu1
td5
15
20
ns
ns
4
4
td6
td7
td9
td11
t1
td8
td10
t2
25
25
25
20
25
25
25
25
ns
ns
ns
ns
ns
ns
ns
ns
5
5
5
5
5
6
6
6
td12
tw4
tw5
10
ns
ns
ns
7, 8
7, 8
7
70
20
tw6
tw7
td13
45
6140
ns
ns
ms
12
11
11
7200
25
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相關(guān)代理商/技術(shù)參數(shù) |
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| 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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