參數(shù)資料
型號(hào)： EVAL-AD7641CBZ
廠商： Analog Devices Inc
文件頁數(shù)： 19/28頁
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD7641
產(chǎn)品培訓(xùn)模塊： ADC Applications
ADC Architectures
ADC DC/AC Performance
標(biāo)準(zhǔn)包裝： 1
系列： PulSAR®
ADC 的數(shù)量： 1
位數(shù)： 18
采樣率（每秒）： 2M
數(shù)據(jù)接口： 串行
輸入范圍： ±2.5 V
在以下條件下的電源（標(biāo)準(zhǔn)）： 2MSPS 帶內(nèi)部基準(zhǔn)時(shí)為 75mW
工作溫度： -40°C ~ 85°C
已用 IC / 零件： AD7641
已供物品： 板
相關(guān)產(chǎn)品： AD7641BSTZRL-ND - IC ADC 18BIT 2MSPS SAR 48-LQFP
AD7641BCPZRL-ND - IC ADC 18BIT 2MSPS SAR 48-LFCSP
AD7641BSTZ-ND - IC ADC 18BIT 2MSPS SAR 48-LQFP
AD7641BCPZ-ND - IC ADC 18BIT 2MSPS SAR 48-LFCSP
AD7641
Rev. 0 | Page 26 of 28
SPI Interface (ADSP-219x)
MICROPROCESSOR INTERFACING
Figure 40 shows an interface diagram between the AD7641 and
an SPI-equipped DSP, the ADSP-219x. To accommodate the
slower speed of the DSP, the AD7641 acts as a slave device and
data must be read after conversion. This mode also allows the
daisy-chain feature. The convert command can be initiated in
response to an internal timer interrupt. The 18-bit output data
are read with three SPI byte access. The reading process can be
initiated in response to the end-of-conversion signal (BUSY
going low) using an interrupt line of the DSP. The serial
peripheral interface (SPI) on the ADSP-219x is configured for
master mode (MSTR) = 1, clock polarity bit (CPOL) = 0, clock
phase bit (CPHA) = 1, and the SPI interrupt enable (TIMOD) =
00 by writing to the SPI control register (SPICLTx). It should be
noted that to meet all timing requirements, the SPI clock should
be limited to 17 Mb/s, allowing it to read an ADC result in less
than 1 μs. When a higher sampling rate is desired, it is
recommended to use one of the parallel interface modes.
The AD7641 is ideally suited for traditional dc measurement
applications supporting a microprocessor, and ac signal processing
applications interfacing to a digital signal processor. The
AD7641 is designed to interface with a parallel 8-bit or 16-bit
wide interface or with a general-purpose serial port or I/O ports
on a microcontroller. A variety of external buffers can be used
with the AD7641 to prevent digital noise from coupling into the
ADC. The SPI Interface (ADSP-219x) section illustrates the use
of the AD7641 with the ADSP-219x SPI-equipped DSP.
04
76
1
-04
1
BUSY
CS
SDOUT
SCLK
CNVST
AD7641
PFx
SPIxSEL (PFx)
MISOx
SCKx
PFx OR TFSx
ADSP-219x1
DVDD
MODE0
MODE1
EXT/INT
RD
INVSCLK
1ADDITIONAL PINS OMITTED FOR CLARITY.
Figure 40. Interfacing the AD7641 to ADSP-219x
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EVAL-AD7641EDZ 功能描述:BOARD EVAL FOR AD7641 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:* 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件
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