參數(shù)資料
型號(hào): AD664KNZ-UNI
廠商: Analog Devices Inc
文件頁數(shù): 9/23頁
文件大小: 0K
描述: IC DAC 12BIT QUAD UNIPOL 28DIP
產(chǎn)品培訓(xùn)模塊: Data Converter Fundamentals
DAC Architectures
標(biāo)準(zhǔn)包裝: 1
設(shè)置時(shí)間: 8µs
位數(shù): 12
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 4
電壓電源: 雙 ±
功率耗散(最大): 525mW
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
輸出數(shù)目和類型: 4 電壓,單極;4 電壓,雙極
采樣率(每秒): 125k
AD664
REV.
–17–
The following IBM PC Basic routine produces four output volt-
age ramps from one AD664. Line numbers 10 through 70 de-
fine the hardware addresses for the first and second ranks of
DAC registers as well as the first and second ranks of the mode
select register. Program variables are initialized in line numbers
110 through 130. Line number 170 writes “0s” out to the first
rank and, then, the second rank of the mode select register.
Line numbers 200 through 320 calculate output voltages. Fi-
nally line numbers 410 through 450 update the first, then the
second ranks of the DAC input registers. Hardware registers
may be read with the “INP” instruction. For example, the con-
tents of the DAC A register may be accessed with the following
com mand: Line#
A = INP(DACA).
5
REM----AD664 LISSAJOUS PATTERNS----
10
REM ---ASSIGN HARDWARE ADDRESSES---
20
DACA = 785
30
DACB = 787
40
DACC = 789
50
DACD = 791
60
DAC2ND = 792
70
MODE1 = 769: MODE2 = 776
80
REM
90
REM
100
REM ---INITIALIZE VARIABLES---
110
X = 0: Y1 = 128: Y2 = 64: Y3 = 32
120
CX = 1: CY1 = 1: CY2 = -1: CY3= 1
130
FX = 9: FY1 = 5: FY2 = 13: FY3 = 15
140
REM
150
REM
160
REM ---INITIALIZE MODES AND GAINS---
170
OUT MODE1,0: OUT MODE2,0
180
REM
190
REM
200
REM ---CALCULATE VARIABLES---
210
X = X + FX*CX
220
Y1 = Y1 + FY1*CY1
230
Y2 = Y2 + FY2*CY2
240
Y3 = Y3 + FY3*CY3
250
IF X > 255 THEN X = 255: CX = -1: GOTO 270
260
IF X < 0 THEN X = 0: CX = 1
270
IF Y1 > 255 THEN Y1 = 255: CY1 = -1: GOTO 290
280
IF Y1 < 0 THEN Y1 = 0: CY1 = 1
290
IF Y2 > 255 THEN Y2 = 255: CY2 = -1 GOTO 310
300
IF Y2 < 0 THEN Y2 = 0: CY2 = -1
310
IF Y3 > 255 THEN Y3 = 255: CY3 = -1: GOTO 400
320
IF Y3 < 0 THEN Y3 = 0: CY3 = 1
330
REM
340
REM
400
REM ---SEND DAC DATA---
410
OUT DACA,X
420
OUT DACB,Yl
430
OUT DACC,Y2
440
OUT DACD,Y3
450
OUT DAC2ND,0
500
REM
510
REM
520
REM ---LOOP BACK---
530
GOTO 210
D
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