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| 型号： | THS1031IDWRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| 封装： | GREEN, PLASTIC, SOIC-28 |
| 文件页数： | 18/42页 |
| 文件大小： | 730K |
| 代理商： | THS1031IDWRG4 |
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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
25
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
clamp operation (continued)
Line Sync
Black
Level
Video at AIN
CLAMP
Figure 29. Example Waveforms for Line-Clamping to a Video Input Black Level
clamp DAC output voltage range and limits
When using the internal clamp DAC in top/bottom or center span mode, the user must ensure that the desired
dc clamp level at AIN lies within the voltage range VREFBF to VREFTF. This is because the clamp DAC voltage
is constrained to lie within this range VREFBF to VREFTF. Specifically:
VDAC
+ V
REFBF ) (VREFTF * VREFBF)
(0.006
) 0.988
(DAC code) 1024)
DAC codes can range from 0 to 1023. Figure 30 graphically shows the clamp DAC output voltage versus the
DAC code.
VDAC
0
1023
VREFBF + 0.006(VREFTF–VREFBF)
VREFBF + 0.987(VREFTF–VREFBF)
DAC Code
VREFTF
VREFBF
Figure 30. Clamp DAC Output Voltage Versus DAC Register Code Value
If the desired dc level at AIN does not lie within the voltage range VREFTF to VREFBF, then either the CLAMPIN
pin can be used instead to provide a suitable reference voltage, or it may be possible to redesign the application
to move the AIN input range into the CLAMP DAC voltage range. This is achieved in both top/bottom and center
span modes by shifting both REFTS and REFBS up or down by the voltage through which the AIN input range
is to be moved.
(8)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| THS1031IPW | 功能描述:模数转换器 - ADC _ RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| THS1031IPWG4 | 功能描述:模数转换器 - ADC 10B 30 MSPS ADC Sgl Ch. Integ. Pgmable RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| THS1031IPWR | 功能描述:模数转换器 - ADC 10-Bit 30 MSPS 1-Ch RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| THS1031IPWRG4 | 功能描述:模数转换器 - ADC 10-Bit 30 MSPS 1-Ch RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| THS1031SOIC | 制造商:TI 制造商全称:Texas Instruments 功能描述:2.7 V . 5.5 V, 10-BIT, 30 MSPS CMOS ANALOG-TO-DIGITAL CONVERTER |
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