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參數(shù)資料
| 型號： | AD7641BCPZRL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 19/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 18BIT 2MSPS SAR 48-LFCSP |
| 產(chǎn)品培訓(xùn)模塊： | ADC Applications ADC Architectures ADC DC/AC Performance |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 位數(shù)： | 18 |
| 采樣率（每秒）： | 2M |
| 數(shù)據(jù)接口： | 串行，并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 92mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 48-LFCSP-VQ（7x7） |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個差分，雙極 |
| 配用： | EVAL-AD7641CBZ-ND - BOARD EVALUATION FOR AD7641 |
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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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| AD7641BSTZ | 功能描述:IC ADC 18BIT 2MSPS SAR 48-LQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7641BSTZRL | 功能描述:IC ADC 18BIT 2MSPS SAR 48-LQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端，雙極 |
| AD7641XST | 制造商:Analog Devices 功能描述: |
| AD7641XST-U3 | 制造商:Analog Devices 功能描述: |
| AD7643 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit, 1 MSPS, Differential, Programmable Input PulSAR ADC |
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