參數(shù)資料
型號(hào)： DDC118IRTCR
英文描述： Octal Current Input 20-Bit Analog-To-Digital Converter
中文描述： 八路電流輸入20位模擬數(shù)字轉(zhuǎn)換器
文件頁(yè)數(shù)： 8/30頁(yè)
文件大?。?/td> 384K
代理商： DDC118IRTCR
""#
SBAS325A JUNE 2004 REVISED JUNE 2005
THEORY OF OPERATION
The block diagram of the DDC118 is shown in Figure 1.
The device contains eight identical input channels that
perform the function of current-to-voltage integration
followed by a multiplexed A/D conversion. Each input has
two integrators so that the current-to-voltage integration
can be continuous in time. The output of the sixteen
integrators are switched to four delta-sigma (
Σ
)
converters via four four-input multiplexers. With the
www.ti.com
8
DDC118 in the continuous integration mode, the output of
the integrators from one side of the inputs will be digitized
while the other eight integrators are in the integration
mode, as illustrated in the timing diagram in Figure 2. This
integration and A/D conversion process is controlled by
the system clock, CLK. The results from side A and side
B of each signal input are stored in a serial output shift
register. The DVALID output goes low when the shift
register contains valid data.
Dual
Switched
Integrator
Dual
Switched
Integrator
Σ
Modulator
Digital
Filter
Digital
Input/Output
FORMAT
DCLK
DCLK
DVALID
DOUT
DOUT
DIN
DIN
Control
IN3
IN1
VREF
DGND
DVDD
AGND
AVDD
Dual
Switched
Integrator
Dual
Switched
Integrator
Σ
Modulator
Digital
Filter
IN4
IN2
Dual
Switched
Integrator
Dual
Switched
Integrator
Σ
Modulator
Digital
Filter
IN7
IN5
Dual
Switched
Integrator
Dual
Switched
Integrator
Σ
Modulator
Digital
Filter
IN8
IN6
CLK
CONV
RANGE0
RANGE1
RANGE2
TEST
CLK_4X
HISPD/LOPWR
RESET
Figure 1. DDC118 Block Diagram
相關(guān)PDF資料
PDF描述
DDC118IRTCT Octal Current Input 20-Bit Analog-To-Digital Converter
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DDR-GJS-J2L1-1-I1 LED GaP
DDR-GJS-K1 LED GaP
DDR-GJS-K2 LED GaP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DDC118IRTCRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Octal Current-Input 20-Bit 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
DDC118IRTCT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Octal Current-Input 20-Bit 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
DDC118IRTCT 制造商:Texas Instruments 功能描述:IC ADC 20BIT OCTAL 48-VQFN
DDC118IRTCT 制造商:Texas Instruments 功能描述:A/D CONVERTER (A-D) IC ((NW))
DDC118IRTCTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Octal Current-Input 20-Bit 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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