參數(shù)資料
型號： THS1040CDWG4
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, SOIC-28
文件頁數(shù)： 15/36頁
文件大小： 751K
代理商： THS1040CDWG4
THS1040
SLAS290C OCTOBER 2001 REVISED OCTOBER 2004
22
www.ti.com
PRINCIPLES OF OPERATION
operating configuration examples (continued)
Figure 30 shows a configuration using the internal ADC references for digitizing a dc-coupled differential input
with 1.5-Vp-p span and 1.5-V common-mode voltage. External resistors are used to set the internal bandgap
reference output at VREF to 0.75 V. Tying MODE to AVDD then sets the REFT and REFB voltages via the internal
reference generator for a 1.5-Vp-p ADC input range.
If a transformer is used to generate the differential ADC input from a single-ended signal, then the BIASREF
pin provides a suitable bias voltage for the secondary windings center tap when MODE = AVDD.
AIN+
AIN
VREF = 0.75 V
REFB
MODE
REFSENSE
AVDD
1.875 V
1.125 V
1.875 V
1.125 V
1.5 V
REFT
5 k
10 k
0.1
F
10
F
20 pF
20
20
0.1
F
0.1
F
10
F
Figure 30. Operating Configuration: 1.5-V Differential Input, Internal ADC References
Figure 31 shows a configuration using the internal ADC references and an external VREF source for digitizing
a dc-coupled single-ended input with span 0.5 V to 2 V. A 1.25-V external source provides the bias voltage for
the AIN pin and also, via a buffered potential divider, the 0.75 VREF voltage required to set the input range
to 1.5 Vp-p MODE is tied to AVDD to set internal ADC references configuration.
AIN+
AIN
REFT
MODE
REFB
2 V
0.5 V
1.25 V
VREF
AVDD
10 k
_
+
REFSENSE
AVDD
15 k
(0.75 V)
1.25
Source
0.1
F
10
F
0.1
F
0.1
F
20 pF
20
20
10
F
Figure 31. Operating Configuration: 1.5-V Single-Ended Input, External VREF Source
相關(guān)PDF資料
PDF描述
THS1040CDWR 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
THS1040CDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Low Power ADC 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
THS1040CDWRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Low Power ADC 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
THS1040CPW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Low Power ADC 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
THS1040CPWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Low Power ADC 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
THS1040CPWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Low Power ADC 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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