参数资料
型号: THS1040CDW
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: 9/36页
文件大小: 751K
代理商: THS1040CDW
THS1040
SLAS290C OCTOBER 2001 REVISED OCTOBER 2004
17
www.ti.com
PRINCIPLES OF OPERATION
internal reference mode (MODE = AVDD or AVDD/2)
Sample
and
Hold
X1
ADC
Core
AIN+
AIN
Internal
Reference
Buffer
VREF
AGND
AVDD + VREF
2
AVDD VREF
2
Figure 22. ADC Reference Generation, MODE = AVDD/2
Connecting MODE to AVDD or AVDD/2 enables the internal ADC references buffer A2. The outputs of A2 are
connected to the REFT and REFB pins and its inputs are connected to pins VREF and AGND. The resulting
voltages at REFT and REFB are:
REFT
+
AV
DD )
VREF
2
REFB
+
AV
DD *
VREF
2
Depending on the connection of the REFSENSE pin, the voltage on VREF may be driven by an off-chip source
or by the internal bandgap reference A1 (see onboard reference generator) to match the THS1040 input range
to their application requirements.
When MODE = AVDD the BIASREF pin provides a buffered, stabilized AVDD/2 output voltage that can be used
as a bias reference for ac coupling networks connecting the signal sources to the AIN+ or AIN inputs. This
removes the need for the user to provide a stabilized external bias reference.
(7)
(8)
相关PDF资料
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THS1040IPW 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
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THS1040CDWG4 功能描述:模数转换器 - ADC 10 Bit 40 MSPS Low Power 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
THS1040CDWR 功能描述:模数转换器 - ADC 10 Bit 40 MSPS Low Power 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
THS1040CDWRG4 功能描述:模数转换器 - ADC 10 Bit 40 MSPS Low Power 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
THS1040CPW 功能描述:模数转换器 - ADC 10 Bit 40 MSPS Low Power 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
THS1040CPWG4 功能描述:模数转换器 - ADC 10 Bit 40 MSPS Low Power 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