參數(shù)資料
型號(hào)： MAX520CWE
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： DAC
英文描述： Converter IC
中文描述： QUAD, SERIAL INPUT LOADING, 8-BIT DAC, PDSO16
封裝： 0.300 INCH, SOP-16
文件頁數(shù)： 9/11頁
文件大小： 215K
代理商： MAX520CWE
M
Low-Power, Dual, 8-Bit, Voltage Output
S erial DAC in 8-Pin S OT 23
_______________________________________________________________________________________
9
Table 2. Serial-Interface Programming Commands
Table 3. Example of a 16-Bit Input Word
X
=
Don’t care.
* = Not shown, for the sake of clarity. The functions of loading and shutting down the DACs and programming the logic can be combined in a single
command.
CONTROL
DATA
FUNCTION
D0
LSB
D1
D2
D3
D4
D5
D6
D7
MSB
LA
LB
UB4
SA
SB
UB3
UB2
UB1
X
X
X
X
1
1
*
*
*
*
*
0
0
*
*
*
*
*
0
0
0
0
0
0
0
0
X
X
X
X
X
X
X
X
No Operation to DAC Registers
Unassigned Command
Load Register to DAC B
Load Register to DAC A
Load Both DAC Registers
All DACs Active
Unassigned Command
Shutdown
Shutdown
Shutdown
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
*
*
*
*
*
1
1
0
1
0
1
*
*
*
*
*
0
0
0
0
0
0
0
0
0
1
1
1
0
1
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
LOADED
IN FIRST
LOADED
IN LAST
UB1
UB2
X
X
UB3
1
SB
0
SA
0
UB4
0
LB
1
LA
1
D7
1
D6
0
D5
0
D4
0
D3
0
D2
0
D1
0
D0
0
Digital Inputs
The digital inputs are compatible with CMOS logic.
Supply current increases slightly when toggling the
logic inputs through the transition zone between
0.3
V
DD
and 0.7
V
DD
.
Microprocessor Interfacing
The MAX5223 serial interface is compatible with
MICROWIRE, SPI, and QSPI. For SPI, clear the CPOL
and CPHA bits (CPOL = 0 and CPHA = 0). CPOL = 0
sets the inactive clock state to zero, and CPHA = 0
changes data at the falling edge of SCLK. This setting
allows SPI to run at full clock speeds. If a serial port is
not available on your μP, three bits of a parallel port can
be used to emulate a serial port by bit manipulation.
Minimize digital feedthrough at the voltage outputs by
operating the serial clock only when necessary.
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