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參數資料
型號: AD7845JR
廠商: ANALOG DEVICES INC
元件分類: DAC
英文描述: LC2MOS Complete 12-Bit Multiplying DAC
中文描述: PARALLEL, WORD INPUT LOADING, 2.5 us SETTLING TIME, 12-BIT DAC, PDSO24
封裝: SOIC-24
文件頁數: 10/12頁
文件大小: 193K
代理商: AD7845JR
AD7845
REV. B
–10–
8-BIT MICROPROCESSOR SYSTEMS
Figure 22 shows an interface circuit for the AD7845 to the
8085A 8-bit microprocessor. The software routine to load data
to the device is given in Table IV. Note that the transfer of the
12 bits of data requires two write operations. The first of these
loads the 4 MSBs into the 7475 latch. The second write opera-
tion loads the 8 LSBs plus the 4 MSBs (which are held by the
latch) into the DAC.
Figure 22. 8085A Interface
Table IV. Subroutine Listing for Figure 22
2000 LOAD DAC: LXI
H,#3000
The H,L register pair
are loaded with latch
address 3000.
Load the 4 MSBs of
data into accumulator.
Transfer data from
accumulator to latch.
Increment H,L pair to
AD7845 address.
Load the 8 LSBs of
data into accumulator.
Transfer data from
accumulator to DAC.
End of routine.
MVI
A,#“MS”
MOV
M,A
INR
L
MVI
A,#“LS”
MOV
M,A
RET
MICROPROCESSOR INTERFACING
16-BIT MICROPROCESSOR SYSTEMS
Figures 19, 20 and 21 show how the AD7845 interfaces to
three popular 16-bit microprocessor systems. These are the
MC68000, 8086 and the TM32010. The AD7845 is treated as
a memory-mapped peripheral to the processors. In each case, a
write instruction loads the AD7845 with the appropriate data.
The particular instructions used are as follows:
MC68000:
MOVE
8086:
MOV
TMS32010: OUT
Figure 19. AD7845 to MC68000 Interface
Figure 20. AD7845 to 8086 Interface
Figure 21. TMS32010
相關PDF資料
PDF描述
AD7845KN LC2MOS Complete 12-Bit Multiplying DAC
AD7845KP LC2MOS Complete 12-Bit Multiplying DAC
AD7845KR LC2MOS Complete 12-Bit Multiplying DAC
AD7846KN LC2MOS 16-Bit Voltage Output DAC
AD7846KP LC2MOS 16-Bit Voltage Output DAC
相關代理商/技術參數
參數描述
AD7845JRZ 功能描述:IC DAC 12BIT MULT LC2MOS 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 設置時間:4µs 位數:12 數據接口:串行 轉換器數目:2 電壓電源:單電源 功率耗散(最大):- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP,8-MSOP(0.118",3.00mm 寬) 供應商設備封裝:8-uMAX 包裝:管件 輸出數目和類型:2 電壓,單極 采樣率(每秒):* 產品目錄頁面:1398 (CN2011-ZH PDF)
AD7845JRZ 制造商:Analog Devices 功能描述:IC 12-BIT DAC
AD7845JRZ 制造商:Analog Devices 功能描述:IC, 12BIT DAC, MULTIPLYING, WSOIC24
AD7845JRZ-REEL 功能描述:12 Bit Digital to Analog Converter 1 24-SOIC W 制造商:analog devices inc. 系列:- 包裝:帶卷(TR) 零件狀態:有效 位數:12 數模轉換器數:1 建立時間:5μs 輸出類型:Voltage - Buffered 差分輸出:無 數據接口:并聯 參考類型:外部 電壓 - 電源,模擬:±14.25 V ~ 15.75 V 電壓 - 電源,數字:- INL/DNL(LSB):±1(最大),±1(最大) 架構:R-2R 工作溫度:0°C ~ 70°C 封裝/外殼:24-SOIC(0.295",7.50mm 寬) 供應商器件封裝:24-SOIC W 標準包裝:1,000
AD7845KN 制造商:Analog Devices 功能描述:DAC 1-CH R-2R 12-bit 24-Pin PDIP Tube 制造商:Rochester Electronics LLC 功能描述:COMPLETE 12 BIT MDAC IC - Bulk
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