t35 " />
參數(shù)資料
型號(hào): AD7663ACPZRL
廠商: Analog Devices Inc
文件頁(yè)數(shù): 11/24頁(yè)
文件大?。?/td> 0K
描述: IC ADC 16BIT CMOS 5V 48LFCSP
標(biāo)準(zhǔn)包裝: 2,500
系列: PulSAR®
位數(shù): 16
采樣率(每秒): 250k
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): 41mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 48-VFQFN 裸露焊盤(pán),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(lèi)型: 4 個(gè)單端,單極;4 個(gè)單端,雙極
配用: EVAL-AD7663CBZ-ND - BOARD EVALUATION FOR AD7663
REV. B
AD7663
–19–
CS
SCLK
SDOUT
D15
D14
D1
D0
D13
X15
X14
X13
X1
X0
Y15
Y14
BUSY
SDIN
INVSCLK = 0
t35
t36 t37
t31
t32
t16
t33
t34
X15
X14
X
12
3
14
15
16
17
18
EXT/
INT = 1
RD = 0
Figure 19. Slave Serial Data Timing for Reading (Read after Convert)
SLAVE SERIAL INTERFACE
External Clock
The AD7663 is configured to accept an externally supplied
serial data clock on the SCLK pin when the EXT/
INT pin is
held HIGH. In this mode, several methods can be used to read
the data. The external serial clock is gated by
CS and the data
are output when both
CS and RD are LOW. Thus, depending
on
CS, the data can be read after each conversion or during the
following conversion. The external clock can be either a continu-
ous or discontinuous clock. A discontinuous clock can be either
normally high or normally low when inactive. Figures 19 and 21
show the detailed timing diagrams of these methods.
While the AD7663 is performing a bit decision, it is important
that voltage transients not occur on digital input/output pins or
degradation of the conversion result could occur. This is par-
ticularly important during the second half of the conversion
phase because the AD7663 provides error correction circuitry
that can correct for an improper bit decision made during the first
half of the conversion phase. For this reason, it is recommended
that when an external clock is being provided, it is a discontinuous
clock that is toggling only when BUSY is LOW or, more
importantly, that does not transition during the latter half of
BUSY HIGH.
External Discontinuous Clock Data Read after Conversion
This mode is the most recommended of the serial slave modes.
Figure 19 shows the detailed timing diagrams of this method.
After a conversion is complete, indicated by BUSY returning
LOW, the result of this conversion can be read while both
CS and
RD are LOW. The data is shifted out, MSB first, with 16 clock
pulses and is valid on both the rising and falling edge of the clock.
Among the advantages of this method, the conversion performance
is not degraded because there are no voltage transients on the
digital interface during the conversion process.
Another advantage is to be able to read the data at any speed up
to 40 MHz, which accommodates both slow digital host interface
and the fastest serial reading.
Finally, in this mode only, the AD7663 provides a “daisy-chain”
feature using the RDC/SDIN input pin for cascading multiple
converters together. This feature is useful for reducing component
count and wiring connections when desired as, for instance, in
isolated multiconverter applications.
An example of the concatenation of two devices is shown in
Figure 20. Simultaneous sampling is possible by using a com-
mon
CNVST signal. It should be noted that the RDC/SDIN
input is latched on the opposite edge of SCLK of the one used
to shift out the data on SDOUT. Therefore, the MSB of the
“upstream” converter just follows the LSB of the “downstream”
converter on the next SCLK cycle.
CNVST
CS
SCLK
SDOUT
RDC/SDIN
BUSY
DATA
OUT
AD7663
#1
(DOWNSTREAM)
BUSY
OUT
CNVST
CS
SCLK
AD7663
#2
(UPSTREAM)
RDC/SDIN
SDOUT
SCLK IN
CS IN
CNVST IN
Figure 20. Two AD7663s in a Daisy-Chain Configuration
相關(guān)PDF資料
PDF描述
VE-263-IW-S CONVERTER MOD DC/DC 24V 100W
AD7663ASTZRL IC ADC 16BIT CMOS 48-LQFP T/R
ADN4692EBRZ-RL7 IC TXRX MLVDS 100MBPS 8SOIC
VE-23F-MX-F4 CONVERTER MOD DC/DC 72V 75W
VE-23F-MX-F3 CONVERTER MOD DC/DC 72V 75W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7663AST 制造商:Analog Devices 功能描述:ADC Single SAR 250ksps 16-bit Parallel/Serial 48-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:16-BIT, 250K SPS CMOS A/D CONVERTER - Bulk 制造商:Analog Devices 功能描述:A/D Converter (A-D) IC
AD7663ASTRL 制造商:Analog Devices 功能描述:ADC Single SAR 250ksps 16-bit Parallel/Serial 48-Pin LQFP T/R
AD7663ASTZ 功能描述:IC ADC 16BIT CMOS 48-LQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 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(lèi)型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤(pán)(4x4) 包裝:Digi-Reel® 輸入數(shù)目和類(lèi)型:8 個(gè)單端,單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱(chēng):296-25851-6
AD7663ASTZ 制造商:Analog Devices 功能描述:IC, ADC, 16BIT, 250KSPS, LQFP-48
AD7663ASTZRL 功能描述:IC ADC 16BIT CMOS 48-LQFP T/R RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):12 采樣率(每秒):300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散(最大):75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:24-SOIC(0.295",7.50mm 寬) 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類(lèi)型:1 個(gè)單端,單極;1 個(gè)單端,雙極