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參數資料
| 型號： | MAX522 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual Differential Drivers and Receivers With +/-15-kV IEC ESD Protection 16-VQFN -40 to 85 |
| 中文描述： | 雙路、8位、電壓輸出、串行DAC，8引腳SO封裝 |
| 文件頁數： | 10/12頁 |
| 文件大?。?/td> | 116K |
| 代理商： | MAX522 |
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 MAX522 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 (0.5MHz). 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.
M
Dual, 8-Bit, Voltage-Output
S erial DAC in 8-Pin S O Pac kage
10
______________________________________________________________________________________
1LSB
REF
2
REF
1
256
ANALOG OUTPUT
REF
D
256
8
=
×
=
×
=
×
Table 4. Code Table
CS
SCLK
DIN
t
DS
t
DH
t
CL
t
CH
t
CSS
t
CSPWH
t
CSH
Figure 3. MAX522 Detailed Serial-Interface Timing Diagram
0V
0
0
0
0
0
0
0
0
+
×
REF
1
256
1
0
0
0
0
0
0
0
+
×
REF
127
256
1
1
1
1
1
1
1
0
+
×
=
+
REF
128
256
REF
2
0
0
0
0
0
0
0
1
+
×
REF
129
256
1
0
0
0
0
0
0
1
+
×
REF
255
256
1
1
1
1
1
1
1
1
ANALOG
OUTPUT
B0
B1
B2
B3
B4
B5
B6
B7
DAC CONTENTS
Note:
where D = Decimal
Value of Digital Input
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