參數(shù)資料
型號(hào)： ADS8422IBPFBR
英文描述： 16-BIT, 4-MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE, REFERENCE
中文描述： 16位4 MSPS的，偽雙極，全差分輸入，微采樣模擬到數(shù)字轉(zhuǎn)換并行接口，參考
文件頁(yè)數(shù)： 22/25頁(yè)
文件大?。?/td> 816K
代理商： ADS8422IBPFBR
www.ti.com
APPLICATION INFORMATION
ADS8422 TO A HIGH PERFORMANCE DSP INTERFACE
Figure 34
shows a parallel interface between the ADS8422 and a Texas instruments high performance DSP
such as the TMS320C6713 using the full 16-bit bus. The ADS8422 is mapped onto the CE2 memory space of
the TMS320C6713 DSP. The read and reset signals are generated by using a 3-to-8 decoder. A read operation
from the address 0xA000C000 generates a pulse on the RD pin of the data converter, wheras a read operation
form word address 0xA0014000 generates a pulse on the RESET/PD1 pin. The CE2 signal of the DSP acts as
CS (chip select) for the converter. As the TMS320C6713 features a 32-bit external memory interface, the BYTE
input of the converter can be tied permanently low, disabling the foldback of the data bus. The BUSY signal of
the ADS8422 is appiled to the EXT_INT6 interrupt input of the DSP, enabling the EDMA controller to react on
the falling edge of this signal and to collect the conversion result. The TOUT1 (timer out 1) pin of the
TMS320C6713 is used to source the CONVST signal of the converter.
CS
RD
CONVST
BUSY
BDGND
BYTE
+VBD
DB[15:0]
TMS320C6713
DSP
+VA = 5 V
I/O Supply
+VBD +2.7 V
Ext Ref
Input
Analog
Input
+
R
A
+
ADS8422
R
I/O Digital Ground
BDGND
AGND
EA[16:14]
ED[15:0]
ARE
Address
Decoder
TOUT1
EXT_INTG
PD2
PD1/RESET
+
0.1
m
F
10
m
F
AGND
0
W
See Note A
+VAREG = 3 V
0.1 F
m
10 F
m
1 F
m
0.1 F
m
CE2
+
R
R
R
A
+VA = 5 V
ADS8422
AGND
AGND
+
0.1
m
F
10
m
F
AGND
10 F
m
0.1 F
m
1 F
m
0.1 F
m
0
W
See Note A
+VAREG = 3 V
ADS8422
SLAS512B–JUNE 2006–REVISED DECEMBER 2006
A.
This resistor (0
) can be installed to use the same 5-V supply.
Figure 34. ADS8422 Application Circuitry
A.
This resistor (0
) can be installed to use the same 5-V supply.
Figure 35. ADS8422 Using Internal Reference
23
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相關(guān)PDF資料
PDF描述
ADS8422IBPFBT 16-BIT, 4-MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE, REFERENCE
ADS8422IPFBR 16-BIT, 4-MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE, REFERENCE
ADS8422IPFBT 16-BIT, 4-MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE, REFERENCE
ADS8481IBPFBR 18-BIT, 1-MSPS, PSEUDO-DIFFERENTIAL UNIPOLAR INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE AND REFERENCE
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS8422IBPFBRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16 Bit MSPS Parallel ADC w/Ref 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
ADS8422IBPFBT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16 Bit MSPS Parallel ADC w/Ref 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
ADS8422IBPFBTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16 Bit MSPS Parallel ADC w/Ref 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
ADS8422IPFBR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 4MSPS 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
ADS8422IPFBRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit 4MSPS 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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