參數(shù)資料
型號(hào): MP7528AD
廠商: EXAR CORP
元件分類: DAC
英文描述: CMOS Dual Buffered Multiplying 8-Bit Digital-to-Analog Converter
中文描述: DUAL, PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, CDIP20
封裝: 0.300 INCH, CERAMIC, DIP-20
文件頁數(shù): 8/16頁
文件大?。?/td> 142K
代理商: MP7528AD
MP7528
8
Rev. 2.00
INTERFACE LOGIC INFORMATION
DAC Selection: Both DAC latches share a common 8-bit in-
put port. The control input DACA/DACB selects which DAC can
accept data from the input port.
Mode Selection: Inputs CS and WR control the operating
mode of the selected DAC. See Mode Selection Table below:
Write Mode: When CS and WR are both low the selected
DAC is in the write mode. The input data latches of the selected
DAC are transparent and its analog output responds to activity
on DB0-DB7.
Hold Mode: The selected DAC latch retains the data which
was present on DB0-DB7 just prior to CS and WR assuming a
high state. Both analog outputs remain at the values corre-
sponding to the data in their respective latches.
Table 1. Mode Selection Table
CS
WR
DAC A
L = LOW state, H = HIGH state, X = Don’t care state
DAC A/DAC B
DAC B
L
H
X
X
L
L
H
X
L
L
X
H
Write
Hold
Hold
Hold
Hold
Write
Hold
Hold
Figure 1. Write Cycle Timing Diagram
t
CS
t
CH
t
WR
t
DS
t
DH
DATA IN
STABLE
V
IH
V
IL
V
IH
V
IL
CS
WR
DATA IN
(DB0-DB7)
NOTES:
1.
All input signal rise and fall times measured from 10% to 90% of V
DD
.
V
DD
= +5 V, t
r
= t
f
= 20 ns
V
DD
= +15 V, t
r
= t
f
= 40 ns
2.
Timing measurement reference level is V
IH
+ V
IL
/ 2
t
AS
t
AH
DAC A/DAC B
V
DD
0
V
DD
0
V
DD
0
V
DD
0
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