- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375266 > ADS808 12-Bit, 70MHz Sampling ANALOG-TO-DIGITAL CONVERTER PDF資料下載
參數(shù)資料
| 型號： | ADS808 |
| 英文描述： | 12-Bit, 70MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 12位，70MHz的采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 16/19頁 |
| 文件大小： | 364K |
| 代理商： | ADS808 |
ADS808
SBAS179C
16
www.ti.com
If the analog inputs to the ADS808 are driven differentially, it
is especially important to optimize towards a highly symmetri-
cal layout. Small trace length differences may create phase
shifts compromising a good distortion performance. For this
reason, the use of two single op amps (rather than one dual
amplifier) enables a more symmetrical layout and a better
match of parasitic capacitances. The pin orientation of the
ADS808 package follows a
“
flow-through
”
design with the
analog inputs located on one side of the package while the
digital outputs are located on the opposite side of the quad-
flat package. This provides a good physical isolation be-
tween the analog and digital connections. While designing
the layout, it is important to keep the analog signal traces
separated from any digital lines to prevent noise coupling
onto the analog portion.
Also, try to match trace length for the differential clock signal
(if used) to avoid mismatches in propagation delays. Single-
ended clock lines must be short and should not cross any
other signal traces.
Short-circuit traces on the digital outputs will minimize ca-
pacitive loading. Trace length should be kept short to the
receiving gate (< 2") with only one CMOS gate connected to
one digital output. If possible, the digital data outputs should
be buffered (with a 74LCX571, for example). Dynamic perfor-
mance may also be improved with the insertion of series
resistors at each data output line. This sets a defined time
constant and reduces the slew rate that would otherwise
flow, due to the fast edge rate. The resistor value may be
chosen to result in a time constant of 15% to 25% of the used
data rate.
LAYOUT OF PCB WITH
PowerPAD THERMALLY
ENHANCED PACKAGES
The ADS808 is housed in a 48-lead PowerPAD thermally
enhanced package. To make optimum use of the thermal
efficiencies designed into the PowerPAD package, the PCB
must be designed with this technology in mind. Please refer
to SLMA004 PowerPAD brief
“
PowerPAD Made Easy
”
on
our web site at www.ti.com, which addresses the specific
considerations required when integrating a PowerPAD pack-
age into the PCB design. For more detailed information,
including thermal modeling and repair procedures, please
see SLMA002 technical brief
“
PowerPAD Thermally En-
hanced Package
”
(www.ti.com).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADS809 | 12-Bit, 80MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS820 | 10-Bit, 20MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS820E | 10-Bit, 20MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS820U | 10-Bit, 20MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS821E | 10-Bit, 40MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS808Y/250 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 70MHz Sampling 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 |
| ADS808Y/250G4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 70MHz Sampling 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 |
| ADS808Y/2K | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 70MHz Sampling 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 |
| ADS808Y/2KG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 70MHz Sampling 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 |
| ADS809 | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 80MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。