- 您现在的位置：买卖IC网 > PDF目录98217 > THS1031IDWG4 (TEXAS INSTRUMENTS INC) 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 PDF资料下载
参数资料
| 型号： | THS1031IDWG4 |
| 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： | 7/41页 |
| 文件大小： | 728K |
| 代理商： | THS1031IDWG4 |
第1页第2页第3页第4页第5页第6页当前第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页
THS1031
3-V TO 5.5-V, 10-BIT, 30 MSPS
CMOS ANALOG-TO-DIGITAL CONVERTER
SLAS242E – NOVEMBER 1999 – REVISED MARCH 2002
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
complete system (continued)
The REFTF and REFBF voltage difference and the gain sets the device input range. The next sections describe
in detail the various methods available for setting voltages REFTF and REFBF to obtain the desired input span
and device performance.
ADC reference generation
The THS1031 has three primary modes of ADC reference generation, selected by the voltage level applied to
the MODE pin.
Connecting the MODE pin to AGND gives full external reference mode. In this mode, the user supplies the ADC
reference voltages directly to pins REFTF and REFBF. This mode is used where there is need for minimum
power drain or where there are very tight tolerances on the ADC reference voltages. This mode also offers the
possibility of Kelvin connection of the reference inputs to the THS1031 to eliminate any voltage drops from
remote references that may occur in the system. Only single-ended input is possible in this mode.
Connecting the MODE pin to AVDD/2 gives differential mode. In this mode, the ADC reference voltages REFTF
and REFBF are generated by the internal reference buffer from the voltage applied to the VREF pin. This mode
is suitable for handling differentially presented inputs, which are applied to the AIN and REFTS/REFBS pins.
A special case of differential mode is center span mode, in which user applies a single-ended signal to AIN and
applies the mid-scale input voltage (VM) to the REFTS and REFBS pins.
Connecting the MODE pin to AVDD gives top/bottom mode. In this mode, the ADC reference voltages REFTF
and REFBF are generated by the internal reference buffer from the voltages applied to the REFTS and REFBS
pins. Only single-ended input is possible in top/bottom mode.
Table 1. Typical Set of Reference Connections
REFERENCE MODE
MODE
REFSENSE
VREF
VOLTAGE
REFTS, REFBS
ANALOG INPUT
FIGURES
External
AVSS
AVDD
Disabled
Reference buffer powered
down, reference voltage pro-
vided directly by REFTS and
REFBS
Single-ended
12, 13, 14
VREF
1 V
E t
ll
t REFTS
Internal
AVDD/2
AGND
2 V
Externally connect REFTS
to REFBS This pair then
Differential or
15 16 17
Internal
AVDD/2
External
divider
1 + Ra/Rb
(see Figure 22)
to REFBS. This air then
forms AIN– to the ADC.
center span
15, 16, 17
External (through internal
reference buffer)
AVDD
Disabled
REFTS = VMID + (VFS+ –
Single-ended
Output of VREF can be
AVDD
VREF
1 V
VFS–) × Gain/2
18 19
Out ut of VREF can be
externally tied to REFTS or
AVDD
AGND
2 V
REFBS = VMID – (VFS+ –
(top-bottom
18, 19
REFBS to provide one of the
reference voltages
External
divider
1 + Ra/Rb
(see Figure 22)
REFBS
VMID (VFS+
VFS–) × Gain/2
(to bottom
mode)
相关PDF资料 |
PDF描述 |
|---|---|
| THS1031CDWG4 | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| THS1031CPWG4 | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| THS1031CPWR | 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| THS1031IPWLE | 10-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| THS1031CPWLE | 10-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| THS1031IDWR | 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 |
| THS1031IDWRG4 | 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 |
| 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 |
发布紧急采购，3分钟左右您将得到回复。