參數(shù)資料
型號： THS1230EVM
廠商： Texas Instruments, Inc.
英文描述： THS1230EVM(THS1230評估板)
中文描述： THS1230EVM（THS1230評估板）
文件頁數(shù)： 19/30頁
文件大小： 427K
代理商： THS1230EVM
Analog Output
3-3
Circuit Functionality
3.2.2
External Clock
SMA Connector J4 can be used to input a clock signal to the board from an
external source. If the source is not at the correct dc level for input to the
MM74HC14M hex inverter IC (U12), then it can be ac coupled through C8, with
the dc level trimmed using potentiometer P3 if necessary. The input source
should be 50-
square wave signal with an amplitude of 3.3 V referenced to
digital ground. This is the default setup for the EVM. A summary of the jumper
link settings for the various clock options is shown in Table 3–1.
Table 3–1.Jumper Settings for Clock Options
Clock Options
Internal
Oscillator
External
Oscillator
AC Coupled
External
Oscillator
DC Coupled
LNK44
1-2
2-3
1-2
LNK45
1-2
Removed
2-3
3.3
Analog Output
The ADC digital data is buffered and sent to a THS5671A 14-bit DAC. The
outputs from the DAC are converted from current to voltage and from
differential to single-ended , and made available on SMA connector J9. The
THS5671A DAC latches the THS1215/30 data on the rising edge of DACCLK.
For further information on the THS5671A, refer to the product folder on TI’s
website:
http://focus.ti.com/docs/prod/productfolder.jhtmlgenericPartNumber=THS5671A
3.4
Digital Output
The data outputs from the ADC are buffered using a SN74ALVCH16244
before going to header J5 and feeding back into the DAC. Header J5 is a
standard 40-pin device on a 100-mil grid, and allows easy connection to a logic
analyzer. The outputs are 3.3 V LVTTL compatible. The connector pinout is
listed in Table 3–2.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS1230IDW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low Power High-Speed ADC 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
THS1230IDWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low Power High-Speed ADC 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
THS1230IDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low Power High-Speed ADC 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
THS1230IDWRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low Power High-Speed ADC 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
THS1230IPW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low Power High-Speed ADC 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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