參數(shù)資料
型號(hào)： ADS8383EVM
廠商： Texas Instruments, Inc.
英文描述： ADS8383EVM(ADS8383評(píng)估板)
中文描述： ADS8383EVM（ADS8383評(píng)估板）
文件頁(yè)數(shù)： 12/27頁(yè)
文件大?。?/td> 187K
代理商： ADS8383EVM
Signal Conditioning
2-2
2.1
Signal Conditioning
The factory recommends the analog input to any SAR type converter be
buffered and low-pass filtered. It is important to note that the input buffer circuit
of the ADS8383EVM, shown in Figure 21, utilizes the THS4031 configured
as an
inverting
gain of one. The amplifier is not stable in a
conventional
a
gain-of-one configuration. The THS4031 was selected for it’s low noise, high
slew rate and fast settling time. The low pass filter resistor and capacitor values
were selected such that ADS8383EVM would meet the 100 kHz AC
performance specifications listed in the data sheet. The series resistor works
in conjunction with the capacitor to filter the input signal, but also isolates the
amplifier from the 6800 pF capacitive load. The capacitor to ground at the input
of the A/D works in conjunction with the series resistor to filter the input signal,
and acts like a charge reservoir. This external filter capacitor works with the
amplifier to charge the internal sampling capacitor during sampling mode.
The EVM has a provision to offset the input voltage by adjusting R23, a 10-k
potentiometer.
Figure 21.Input Buffer Circuit
1 k
1 k
V
CC
V
I
0.1
μ
F
1
μ
F
10
(+) IN
() IN
6800 pF
1
μ
F
0.1
μ
F
0.22
μ
F
500
4.096 V
10 k
+V
CC
THS4031
+
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AK135 Circular Connector; No. of Contacts:8; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:12-8 RoHS Compliant: No
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS8383IBPFBR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18 Bit 580KSPS Parallel 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
ADS8383IBPFBRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18 Bit 580KSPS Parallel 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
ADS8383IBPFBT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18 Bit 580KSPS Parallel 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
ADS8383IBPFBTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18 Bit 580KSPS Parallel 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
ADS8383IPFBR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18 Bit 580KSPS Parallel 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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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