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LTC1450IG Datasheet(PDF) 8 Page - Linear Technology

Part # LTC1450IG
Description  Parallel Input, 12-Bit Rail-to-Rail Micropower DACs in SSOP
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1450IG Datasheet(HTML) 8 Page - Linear Technology

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8
LTC1450/LTC1450L
DIGITAL INTERFACE TRUTH TABLE
CLR
CSMSB
CSLSB
WR
LDAC
FUNCTION
H
H
L
L
H
Loads the eight LSBs into the input latch
HH
L
↑
H
Latches the eight LSBs into the input latch
HH
↑
L
H
Latches the eight LSBs into the input latch
H
L
H
L
H
Loads the four MSBs into the input latch
HL
H
↑
H
Latches the four MSBs into the input latch
H
↑
H
L
H
Latches the four MSBs into the input latch
H
H
H
H
L
Loads the input latch data into the DAC latch
H
HHH
↑
Latches the input latch data into the DAC latch
H
L
L
L
L
Loads input data into DAC latches (latches transparent)
HL
L
L
↑
Latches input data into DAC latches
L
X
X
X
X
All zeros loaded into input and DAC latches
TIMING DIAGRAM
BLOCK DIAGRAM
CSMSB
WR
LDAC
LTC1450/50L • TD01
tCS
CSLSB
DATA
t CS
t WR
tWR
tCWS
tCWH
tDWS
t LDAC
DAC UPDATE
tDWH
DATA VALID
DATA VALID
REFERENCE
LTC1450: 2.048V
LTC1450L: 1.22V
DAC
12-BIT DAC LATCH
D11
(MSB) D10 D9
D8
D6
D4
D2
D0
(LSB)
D7
D5
D3
D1
UPPER 4-BIT
INPUT LATCH
POWER-ON
RESET
LOWER 8-BIT
INPUT LATCH
LDAC
CLR
CSMSB
WR
CSLSB
REFOUT
VCC
20
19
18
17
22
21
16
4
5
6
7
8
9
10
11
12
13
14
15
24
23
3
1
2
REFHI
REFLO
X1/X 2
VOUT
GND
LTC1450/50L • BD


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