參數(shù)資料
型號(hào)： AD7864BSZ-1REEL
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 17/28頁(yè)
文件大?。?/td> 0K
描述： IC ADC 12BIT DUAL 4CHAN 44-MQFP
標(biāo)準(zhǔn)包裝： 800
位數(shù)： 12
采樣率（每秒）： 520k
數(shù)據(jù)接口： 并聯(lián)
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 120mW
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： 44-QFP
供應(yīng)商設(shè)備封裝： 44-MQFP（10x10）
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 4 個(gè)差分，雙極
AD7864
Rev. D | Page 24 of 28
MICROPROCESSOR INTERFACING
The high speed parallel interface of the AD7864 allows easy
interfacing to most DSPs and microprocessors. This interface
consists of the data lines (DB0 to DB11), CS, RD, WR, EOC,
and BUSY.
AD7864 TO ADSP-2100/ADSP-2101/ADSP-2102
INTERFACE
Figure 23 shows an interface between the AD7864 and the
ADSP-210x. The CONVST signal can be generated by the
ADSP-210x or from some other external source.
shows the
CS being generated by a combination of the DMS
signal and the address bus of the ADSP-210x. In this way, the
AD7864 is mapped into the data memory space of the
ADSP-210x.
The AD7864 BUSY line provides an interrupt to the ADSP-210x
when the conversion sequence is complete on all the selected
channels. The conversion results can then be read from the
AD7864 using successive read operations. Alternately, one can
use the EOC pulse to interrupt the ADSP-210x when the
conversion on each channel is complete when reading between
each conversion in the conversion sequence (
). The
AD7864 is read using the following instruction:
MR0 = DM(ADC)
where MR0 is the ADSP-210x MR0 register and ADC is the
AD7864 address.
CS
RD
WR
BUSY
CONVST
DB0 TO DB11
AD7864
VIN1
VIN2
VIN3
VIN4
DT1/F0
IRQn
RD
WR
D0 TO D24
DMS
A0 TO A13
ADSP-210x
ADDRESS
DECODE
01
34
1-
0
23
Figure 23. AD7864 to ADSP-210x Interface
AD7864 TO TMS320C5x INTERFACE
Figure 24 shows an interface between the AD7864 and the
TMS320C5x. As with the previous interfaces, conversion can be
initiated from the TMS320C5x or from an external source, and
the processor is interrupted when the conversion sequence is
completed. The CS signal to the AD7864 is derived from the DS
signal and a decode of the address bus. This maps the AD7864
into external data memory. The RD signal from the TMS320C5x
is used to enable the ADC data onto the data bus. The AD7864
has a fast parallel bus, consequently there are no wait state
requirements. The following instruction is used to read the
conversion results from the AD7864:
IN D,ADC
where D is the data memory address and ADC is the AD7864
address.
CS
RD
WR
BUSY
CONVST
DB0 TO DB11
AD7864
VIN1
VIN2
VIN3
VIN4
PA0
INTn
RD
WE
D0 TO D15
DS
A0 TO A13
TMS320C5x
ADDRESS
DECODE
01
34
1-
0
24
Figure 24. AD7864 to TMS320C5x Interface
AD7864 TO MC68HC000 INTERFACE
An interface between the AD7864 and the MC68HC000 is
shown in Figure 25. The conversion can be initiated from the
MC68HC000 or from an external source. The AD7864 BUSY
line can be used to interrupt the processor or, alternatively,
software delays can ensure that the conversion has been
completed before a read to the AD7864 is attempted. Because of
the nature of its interrupts, the MC68HC000 requires additional
logic (not shown in Figure 25) to allow it to be interrupted
correctly. For further information on MC68HC000 interrupts,
consult the Addendum to MC68000 Users Manual.
The MC68HC000 AS and R/W outputs are used to generate a
separate RD input signal for the AD7864. RD is used to drive
the MC68HC000 DTACK input to allow the processor to
execute a normal read operation to the AD7864. The conversion
results are read using the following MC68HC000 instruction:
MOVE.W ADC,D0
where D0 is the MC68HC000 D0 register and ADC is the
AD7864 address.
相關(guān)PDF資料
PDF描述
AD7865YSZ-3 IC ADC 14BIT 4CHAN 5V 44-MQFP
AD7866ARU-REEL7 IC ADC 12BIT 2CH DUAL 20TSSOP
AD7871KP IC ADC 14BIT SAMPLING 28-PLCC
AD7873ARUZ IC ADC 12BIT TOUCHSCREEN 16TSSOP
AD7875LNZ IC ADC 12BIT SAMPLING 5V 24-DIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7864BSZ-1REEL2 制造商:AD 制造商全稱:Analog Devices 功能描述:4-Channel, Simultaneous Sampling, High Speed, 12-Bit ADC
AD7865 制造商:AD 制造商全稱:Analog Devices 功能描述:Four-Channel, Simultaneous Sampling, Fast, 14-Bit ADC
AD7865AS-1 制造商:Rochester Electronics LLC 功能描述:4 CH. SIMULTANEOUS BIPOLAR,14-B ADC I.C. - Bulk 制造商:Analog Devices 功能描述:Analog-Digital Converter IC Number of Bi
AD7865AS-1REEL 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP T/R 制造商:Rochester Electronics LLC 功能描述:4 CH. SIMULTANEOUS BIPOLAR,14-B ADC I.C. - Tape and Reel
AD7865AS2 制造商:AD 功能描述:*
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*