參數(shù)資料
型號: AD5546BRU
廠商: ANALOG DEVICES INC
元件分類: DAC
英文描述: Current Output, Parallel Input, 16-/14-Bit Multiplying DACs with 4-Quadrant Resistors
中文描述: PARALLEL, WORD INPUT LOADING, 0.5 us SETTLING TIME, 16-BIT DAC, PDSO28
封裝: MO-153AE, TSSOP-28
文件頁數(shù): 7/16頁
文件大?。?/td> 683K
代理商: AD5546BRU
AD5546/AD5556
Pin No.
15
16
Rev. 0 | Page 7 of 16
Mnemonic
LDAC
WR
Description
Digital Input Load DAC Control. Signal level must be
V
DD
+ 0.3 V.
Write Control Digital Input in Active Low. Transfers shift-register data to DAC register on rising edge. Signal level
must be
V
DD
+ 0.3 V.
Power On Reset State. MSB = 0 resets at zero-scale, MSB = 1 resets at midscale. Signal level must be
V
DD
+ 0.3 V.
Reset in Active Low. Resets to zero-scale if MSB = 0 and resets to midscale if MSB = 1. Signal level must be
V
DD
+ 0.3 V.
Analog and Digital Grounds.
Digital Input Data Bits D13 to D6. Signal level must be
V
DD
+ 0.3 V.
Positive power supply input. Specified range of operation: 2.7 V to 5.5 V.
t
WR
17
18
MSB
RS
19
20–27
28
GND
D13 to D6
V
DD
0
t
DS
t
DH
t
LWD
t
LDAC
t
RS
WR
DATA
LDAC
RS
Figure 5. AD5546/AD5556 Timing Diagram
Table 5. AD5546 Parallel Input Data Format
MSB
Bit Position
B15
Data Word
D15
Table 6. AD5556 Parallel Input Data Format
Bit Position
Data Word
Table 7. Control Inputs
RS
WR
LDAC
Register Operation
0
X
X
Reset output to 0, with MSB pin = 0. Midscale with MSB pin = 1.
1
0
0
Load input register with data bits.
1
1
1
Load DAC register with the contents of the input register.
1
0
1
Input and DAC registers are transparent.
1
the falling edge of the pulse, and then loaded into the DAC register on the rising edge of the pulse.
1
1
0
No register operation.
B14
D14
B13
D13
B12
D12
B11
D11
B10
D10
B9
D9
B8
D8
B7
D7
B6
D6
B5
D5
B4
D4
B3
D3
B2
D2
B1
D1
LSB
B0
D0
MSB
B13
D13
B12
D12
B11
D11
B10
D10
B9
D9
B8
D8
B7
D7
B6
D6
B5
D5
B4
D4
B3
D3
B2
D2
B1
D1
LSB
B0
D0
When LDAC and WR are tied together and programmed as a pulse, the data bits are loaded into the input register on
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