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參數(shù)資料
型號(hào)： THS1040IPWRG4
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, TSSOP-28
文件頁(yè)數(shù)： 7/36頁(yè)
文件大小： 751K
代理商： THS1040IPWRG4
THS1040
SLAS290C OCTOBER 2001 REVISED OCTOBER 2004
15
www.ti.com
PRINCIPLES OF OPERATION
sample-and-hold
Differential input signal sources can be connected directly to the AIN+ and AIN pins using either dc- or
ac-coupling.
For single-ended sources, the signal can be dc- or ac-coupled to one of AIN+ or AIN, and a suitable reference
voltage (usually the midscale voltage, see operating configuration examples) must be applied to the other pin.
Note that connecting the signal to AIN results in it being inverted during sampling.
The sample and hold differential output voltage VQ = (VQ+) (VQ) is given by:
VQ = (AIN+) (AIN)
analog-to-digital converter
VQ is digitized by the ADC, using the voltages at pins REFT and REFB to set the ADC zero-scale (code 0) and
full-scale (code 1023) input voltages.
VQ(ZS)
+* (REFT * REFB)
VQ(FS)
+ (REFT * REFB)
Any inputs at AIN+ and AIN that give VQ voltages less than VQ(ZS) or greater than VQ(FS) lie outside the
ADC’s conversion range and attempts to convert such voltages are signalled by driving pin OVR high when the
conversion result is output. VQ voltages less than VQ(ZS) digitize to give ADC output code 0 and VQ voltages
greater than VQ(FS) give ADC output code 1023.
complete system and system input range
Combining the above equations to find the input voltages [(AIN+) (AIN)] that correspond to the limits of the
ADC’s valid input range gives:
(REFB
* REFT) v [(AIN)) * (AIN*)] v (REFT * REFB)
For both single-ended and differential inputs, the ADC can thus handle signals with a peak-to-peak input range
[(AIN+) (AIN)] of:
[(AIN+) (AIN)] pk-pk input range = 2 x (REFT REFB)
The REFT and REFB voltage difference and the gain sets the device input range. The next sections describe
in detail the various methods available for setting voltages REFT and REFB to obtain the desired input span
and device performance.
(1)
(2)
(3)
(4)
(5)
相關(guān)PDF資料
PDF描述
THS1040IPWG4 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
THS1040CPWG4 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
THS1040CDWG4 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
THS1040CDWR 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
THS1040CPWRG4 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS1041 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-Bit, 40-MSPS ANALOG-TO-DIGITAL CONVERTER WITH PGA AND CLAMP
THS1041CDW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Lo-Pwr RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
THS1041CDWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Lo-Pwr RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
THS1041CDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Lo-Pwr RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
THS1041CDWRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Lo-Pwr RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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