參數(shù)資料
型號： ADS8422IBPFBR
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQFP48
封裝： 9 X 9 MM, GREEN, PLASTIC, TQFP-48
文件頁數(shù)： 15/28頁
文件大小： 1310K
代理商： ADS8422IBPFBR
www.ti.com
APPLICATION INFORMATION
ADS8422 TO A HIGH PERFORMANCE DSP INTERFACE
CS
RD
CONVST
BDGND
+VBD
DB[15:0]
TMS320C6713
DSP
+VA =5V
I/OSupply
+VBD+2.7V
ExtRef
Analog
+V
A
REFM
AGND
+IN
IN
ADS8422
REFIN
I/ODigitalGround
BDGND
AGND
EA[16:14]
ED[15:0]
ARE
Input
Address
Decoder
TOUT1
EXT_INTG
BUSY
PD2
PD1/RESET
+V
AREG
0.1 mF
10 mF
AGND
0 W
SeeNote A
+VAREG=3V
0.1 F
m
10 F
m
1 F
m
0.1 F
m
BYTE
CE2
+V
A
REFOUT
REFIN
REFM
AGND
+VA =5V
ADS8422
AGND
+V
AREG
0.1 mF
10 mF
AGND
10
F
m
0.1
F
m
1
F
m
0.1
F
m
0 W
SeeNote A
+VAREG=3V
SLAS512B – JUNE 2006 – REVISED DECEMBER 2006
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.
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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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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