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參數資料
| 型號： | THS1030CDW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| 封裝： | GREEN, PLASTIC, SOIC-28 |
| 文件頁數： | 17/37頁 |
| 文件大小： | 727K |
| 代理商： | THS1030CDW |
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THS1030
3V TO 5.5V, 10BIT, 30 MSPS
CMOS ANALOGTODIGITAL CONVERTER
SLAS243E NOVEMBER 1999 REVISED DECEMBER 2003
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
AIN input current and input load modeling
When CLK goes low, the source driving AIN must charge the total switched capacitance CS = CSAMPLE + CP2.
The total charge transferred depends on the voltage at AIN and is given by:
Q
CHARGING +
(AIN
* V
LAST
)
C
S
.
For a fixed voltage at AIN, so that AIN and VLAST do not change between samples, the maximum amount of
charge transfer occurs at AIN = FS (charging current flows out of THS1030) and AIN = FS+ (current flows into
THS1030). If AIN is held at the voltage FS+, VLAST = [(FS+) + VM]/2, giving a maximum transferred charge:
Q(FS)
+
(FS
)) * [(FS )) ) VM]
2
C
S +
[(FS
)) * VM]
C
S
2
+ (1 4 of the input voltage span)
C
S
If the input voltage changes between samples, then the maximum possible charge transfer is
Q(max)
+ 3
Q(FS)
which occurs for a full-scale input change (FS+ to FS or FS to FS+) between samples.
The charging current pulses can make the AIN source jump or ring, especially if the source is slightly inductive
at high frequencies. Inserting a small series resistor of 20
or less in the input path can damp source ringing
(see Figure 31). This resistor can be made larger than 20
if reduced input bandwidth or distortion performance
is acceptable.
AIN
R < 20
VS
Figure 28. Damping Source Ringing Using a Small Resistor
(7)
(8)
(9)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| THS1030CDWG4 | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 |
| THS1030CDWR | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 |
| THS1030CDWRG4 | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 |
| THS1030CPW | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 |
| THS1030CPWG4 | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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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