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參數(shù)資料
| 型號(hào)： | MP7636AJS |
| 廠商： | EXAR CORP |
| 元件分類： | DAC |
| 英文描述： | 15 V CMOS Microprocessor Compatible Double-Buffered, Multiplying 16-Bit Digital-to-Analog Converter |
| 中文描述： | PARALLEL, 8 BITS INPUT LOADING, 2 us SETTLING TIME, 16-BIT DAC, PDSO20 |
| 封裝： | 0.300 INCH, SOIC-20 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 84K |
| 代理商： | MP7636AJS |
MP7636A
5
Rev. 2.00
TIMING DIAGRAM
50%
50%
50%
50%
50%
50%
SETTLED TO
+0.01%
CS, BYTE1/BYTE2
WR
DATA BITS
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
t
CS
t
CH
t
W
t
DS
t
S
t
DH
I
OUT1,
I
OUT2
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 MSB
and LSB both 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 DB15: Digital Inputs.
DB0 is the least significant digital input (LSB) and
DB15 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
. The ladder termina-
tion has been tied to I
OUT2
internally.
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 resistor over temperature.
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.
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 +15 V DC.
AGND: Analog Ground.
Back gate of the DAC N-channel current steering
switches.
DGND: Digital Ground .
The timing diagrams for updating the DAC register are shown
in Figures 1 and 2.
R
FB
:
V
REF
:
V
DD
:
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