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LTC1654 Datasheet(PDF) 7 Page - Linear Technology

Part # LTC1654
Description  Dual 14-Bit Rail-to-Rail DAC in 16-Lead SSOP Package
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1654 Datasheet(HTML) 7 Page - Linear Technology

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LTC1654
Power Down
Each DAC can also be independently powered down to less
than 5
µA/DAC of supply current. The reference pin also
goes into a high impedance state when the DAC is powered
down and the reference current will drop to below 0.1
µA.
The amplifiers’ output stage is also three-stated but the
OPERATION
Table 1.
CONTROL
C3
C2
C1
C0
0000
Load Input Register n
0001
Update (Power-Up) DAC Register n
0010
Load Input Register n, Update (Power-Up) All
0011
Load and Update n
0100
Power Down n
0101
Fast n (Speed States are Maintained Even If DAC is
Put in Power-Down Mode)
0110
Slow n (Default State is Slow When Supplies are
Powered Up)
0111
Reserved (Do Not Use)
1000
Reserved (Do Not Use)
1001
Reserved (Do Not Use)
1010
Reserved (Do Not Use)
1011
Reserved (Do Not Use)
1100
Reserved (Do Not Use)
1101
Reserved (Do Not Use)
1110
Reserved (Do Not Use)
1111
No Operation
VOUT pins still have the internal gain-setting resistors
connected to them resulting in an effective resistance from
VOUT to REFLO. This resistance is typically 90k when the
X1/X1/2 pin is tied to VOUT and 36k when X1/X1/2 is tied to
REFLO. Because of this resistance, VOUT will go to VREFLO
when the DAC is powered down and VOUT is unloaded.
ADDRESS (n)
A3
A2
A1
A0
0000
DAC A
0001
DAC B
0010
Reserved (Do Not Use)
0011
Reserved (Do Not Use)
0100
Reserved (Do Not Use)
0101
Reserved (Do Not Use)
0110
Reserved (Do Not Use)
0111
Reserved (Do Not Use)
1000
Reserved (Do Not Use)
1001
Reserved (Do Not Use)
1010
Reserved (Do Not Use)
1011
Reserved (Do Not Use)
1100
Reserved (Do Not Use)
1101
Reserved (Do Not Use)
1110
Reserved (Do Not Use)
1111
Both DACs
INPUT WORD
C3
CONTROL
ADDRESS
DATA (14 + 2 DUMMY LSBs)
C2
C1
C0
A3
A2
A1
A0
D13 D12 D11 D10 D9
D8
D7
D6 D5
D4
D3
D2
D1
D0
X
X
1654 TABLE


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