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| 型号： | THS1030IDWR |
| 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： | 17/37页 |
| 文件大小： | 727K |
| 代理商： | THS1030IDWR |
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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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相关代理商/技术参数 |
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|---|---|
| THS1030IDWRG4 | 功能描述:视频模拟/数字化转换器集成电路 10-Bit 30 MSPS 1-Ch Pin Comp RoHS:否 制造商:Texas Instruments 输入信号类型:Differential 转换器数量:1 ADC 输入端数量:4 转换速率:3 Gbps 分辨率:8 bit 结构: 输入电压:3.3 V 接口类型:SPI 信噪比: 电压参考: 电源电压-最大:3.45 V 电源电压-最小:3.15 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:TCSP-48 封装:Reel |
| THS1030IPW | 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 |
| THS1030IPWG4 | 功能描述:模数转换器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp 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 |
| THS1030IPWR | 功能描述:模数转换器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp 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 |
| THS1030IPWRG4 | 功能描述:模数转换器 - ADC 10-Bit 30 MSPS 1-Ch Pin Comp 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 |
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