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參數資料
| 型號： | THS1031CDW |
| 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： | 8/41頁 |
| 文件大小： | 728K |
| 代理商： | THS1031CDW |
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THS1031
3-V TO 5.5-V, 10-BIT, 30 MSPS
CMOS ANALOG-TO-DIGITAL CONVERTER
SLAS242E – NOVEMBER 1999 – REVISED MARCH 2002
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
full external reference mode (mode = AGND)
Sample
and
Hold
1
–1/2
ADC
Core
PGA
REFTF
REFBF
AIN+
REFTS
REFBS
Internal
Reference
Buffer
Figure 12. ADC Reference Generation, MODE = AGND
When MODE is connected to AGND, the internal reference buffer is powered down, its inputs and outputs
disconnected, and REFTS and REFBS internally connected to REFTF and REFBF respectively. These nodes
are connected by the user to external sources to provide the ADC reference voltages. The internal connections
are designed for use in kelvin connection mode (Figure 14). When using external reference mode as shown
in Figure 13, REFTS must be shorted to REFTF and REFBS must be shorted to REFBF externally. The mean
of REFTF and REFBF must be equal to AVDD/2 (see Figure 13).
AIN
REFTS
REFBS
REFTF
REFBF
REFSENSE
MODE
AVDD
+FS
–FS
+ [(FS+) – (FS–)]
×
0.1
F
10
F
0.1
F
0.1
F
AVDD
2
AVDD
2
DC SOURCE =
GAIN
2
– [(FS+) – (FS–)]
×
AVDD
2
DC SOURCE =
GAIN
2
Figure 13. Full External Reference Mode
It is also possible to use REFTS and REFBS as sense lines to drive the REFTF and REFBF lines (Kelvin mode)
to overcome any voltage drops within the system (see Figure 14).
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相關代理商/技術參數 |
參數描述 |
|---|---|
| THS1031CDWG4 | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch 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 |
| THS1031CDWR | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch 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 |
| THS1031CDWRG4 | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch 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 |
| THS1031CPW | 功能描述:模數轉換器 - ADC 10bit 30MSPS ADC 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 |
| THS1031CPWG4 | 功能描述:模數轉換器 - ADC 10-Bit 30 MSPS 1-Ch 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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