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