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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： | 20/37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
27
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
driving the internal reference buffer (top/bottom mode)
Figure 31 shows the load present on the REFTS and REFBS pins in top/bottom mode due to the internal
reference buffer only. The sample and hold must also be driven via these pins, which adds additional load.
AVDD
AGND
AVDD + REFTS + REFBS
REFTS
REFBS
RIN
14 k
Mode = AVDD
_
+
4
Figure 31. Equivalent Circuit of Inputs to Internal Reference Buffer
Equations for the currents flowing into REFTS and REFBS are:
I
IN
TS
+
3
REFTS
* AV
DD *
REFBS
4
R
IN
I
IN
BS
+
3
REFBS
* AV
DD *
REFTS
4
R
IN
These currents must be provided by the sources on REFTS and REFBS in addition to the requirements of driving
the sample and hold. Tolerance on these currents are
±50%.
driving REFTS and REFBS
C1
7 pF
AVDD
AGND
CLK
C2
0.6 pF
CSAMPLE
VLAST
REFTS
REFBS
Mode = AVDD
Internal
Reference
Buffer
_
+
Figure 32. Equivalent Circuit of REFTS and REFBS Inputs
This is essentially a combination of driving the ADC internal reference buffer (if in top/bottom mode) and also
driving a switched capacitor load like AIN, but with the sampling capacitor and CP2 on each pin now being 0.6 pF
and about 0.6 pF respectively.
(12)
(13)
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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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