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參數(shù)資料
| 型號： | THS10082CDA |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | ADC |
| 英文描述： | 10 bit TWO ANALOG INPUT, 8 MSPS SIMULTANEOUS SAMPLING ANALOG TO DIGITAL CONVERTER |
| 中文描述： | 10位2個模擬輸入，8 MSPS的同步采樣模數(shù)轉(zhuǎn)換器 |
| 文件頁數(shù)： | 33/37頁 |
| 文件大?。?/td> | 263K |
| 代理商： | THS10082CDA |
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SLAS254B
–
MAY 2002
–
REVISED NOVEMBER 2002
www.ti.com
33
DC COUPLING
An operational amplifier can be configured to shift the signal level according to the analog input voltage range of the
THS10082. The analog input voltage range of the THS10082 goes from 1.5 V to 3.5 V. An op-amp specified for 5-V single
supply can be used as shown in Figure 42.
Figure 42 shows an application example where the analog input signal in the range from
–
1 V up to 1 V is shifted by an
op-amp to the analog input range of the THS10082 (1.5 V to 3.5 V). The op-amp is configured as an inverting amplifier with
a gain of
–
1. The required dc voltage of 1.25 V at the noninverting input is derived from the 2.5-V output reference REFOUT
of the THS10082 by using a resistor divider. Therefore, the op-amp output voltage is centered at 2.5 V. The use of ratio
matched, thin-film resistor networks minimizes gain and offset errors.
_
+
5 V
R
R
RS
3.5 V
2.5 V
1.5 V
THS10082
AINP
REFOUT
R
R
1.25 V
1 V
0 V
–
1 V
REFIN
Figure 42. Level-Shift for DC-Coupled Input
DIFFERENTIAL MODE OF OPERATION
For the differential mode of operation, a conversion from single-ended to differential is required. A conversion to differential
signals can be achieved by using an RF-transformer, which provides a center tap. Best performance is achieved in
differential mode.
THS10082
AINP
AINM
REFOUT
C
C
R
R
200
49.9
Mini Circuits
T4
–
1
Figure 43. Transformer Coupled Input
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| THS10082CDAG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 8 MSPS Lo-Pwr 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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| THS10082IDA | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 BIT High Speed AD 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 |
| THS10082IDAG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 8 MSPS Lo-Pwr 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 |
| THS1009 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-BIT, 2 ANALOG INPUT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER |
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