參數(shù)資料
型號: MP1232A
廠商: Exar Corporation
英文描述: CMOS Microprocessor Compatible Double-Buffered 12-Bit Digital-to-Analog Converter
中文描述: 微處理器的CMOS兼容雙緩沖12位數(shù)字到模擬轉(zhuǎn)換器
文件頁數(shù): 5/12頁
文件大?。?/td> 126K
代理商: MP1232A
MP1230A/31A/32A
5
Rev. 2.00
TIMING DIAGRAM
t
CH
50%
50%
50%
50%
50%
50%
SETTLED TO
+0.01%
CS, BYTE1/BYTE2
WR
DATA BITS
t
CS
t
WR
t
DS
t
DH
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
I
OUT1
, I
OUT2
t
S
DEFINITION OF CONTROL SIGNALS:
CS:
Chip Select.(Active low)
It will enable WR1.
Write 1 (Active low)
The WR1 is used to load the digital data bits (DB) into
the input latch.
BYTE1/BYTE2:
Byte sequence control.
The BYTE1/BYTE2 control pin is used to select both
MSB and LSB input latches.
WR2:
Write 2 (Active low)
It will enable XFER.
XFER:
Transfer control signal (Active low)
This signal in combination with WR2 causes the 16-bit
data which is available in the input latches to transfer
to the DAC register
DB0 to DB11: Digital Inputs.
DB0 is the least significant digital input (LSB) and
DB11 is the most significant digital input (MSB).
I
OUT1
:
DAC Current Output 1 Bus.
I
OUT1
is a maximum for a digital code of all 1’s in the
DAC register, and is zero for all 0’s in the DAC register.
WR1:
I
OUT2
:
DAC Current Output 2 Bus.
I
OUT2
is a complement of I
OUT1
.
R
FB
:
Feedback Resistor.
This internal feedback resistor should always be used
(not an external resistor) since it matches the resistors
in the DAC and tracks these resistors over tempera-
ture.
V
REF
:
Reference Voltage Input.
This input connects an external precision voltage
source to the internal DAC. The V
REF
can be selected
over the range of +25V to –25V or the analog signal for
a 4-quadrant multiplying mode application.
V
DD
:
Power Supply Voltage.
This is the power supply pin for the part. The V
DD
can
be from +5 V DC to +15 V DC, however optimum volt-
age is +12 to +15 V DC.
AGND: Analog Ground
Back gate of the DAC N-channel current steering
switches.
DGND: Digital Ground
相關(guān)PDF資料
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