ltc1427cs8-50-trpbf Linear Technology Corporation, ltc1427cs8-50-trpbf Datasheet - Page 5

• Manufacturer Part Number: ltc1427cs8-50-trpbf
• Description: Micropower, 10-bit Current Output Dac With Smbus Serial Interface
• Manufacturer: Linear Technology Corporation

FU CTIO TABLES
BLOCK
PIN
SHDN (Pin 1): Shutdown. A logic low puts the chip into
shutdown mode. In shutdown, the digital settings for the
DAC are retained. On release from shutdown, the previ-
ously programmed value for I
AD1, AD0 (Pins 2, 3): Address Selection Pins. Tie these
two pins to either V
addresses to which the LTC1427-50 will respond.
GND (Pin 4): Ground. Ground should be tied directly to a
ground plane.
SDA (Pin 5): SMBus Bidirectional Data Input/Digital Out-
put. This pin is an open-drain output and requires a pull-
U
AD1
U
H
H
L
L
FUNCTIONS
U
DIAGRAM
AD0
U
SDA
SCL
L
H
L
H
CC
U
or GND to select one of four SMBus
AD0
INTERFACE
SMBUS
W
SMBus Address Location
AD1
OUT
0101101
0101111
0101110
0101100
is reinstated.
3
REGISTER A
EN1
POWER-ON
LATCH
RESET
3-BIT
SD
1
2
8
SHDN
DAC Power-Up Value
up resistor or current source to V
SDA pin and acknowledged by the SDA pin.
SCL (Pin 6): SMBus Clock Input. Data is shifted into the
SDA pin at the rising edges of the SCL clock during data
transfer.
I
V
from noise and ripple by bypassing directly to the ground
plane.
Zero-Scale
Zero-Scale
Zero-Scale
Midscale
REGISTER B
REGISTER C
OUT
EN2
EN2
1-BIT LATCH
CC
10-BIT
LATCH
(Pin 8): Voltage Supply. This supply must be kept free
(Pin 7): DAC Current Output.
SHDN
10
SD
SD
REFERENCE
VOLTAGE
CURRENT
10-BIT
Application
CCFL Backlight Control
General Purpose
General Purpose
LCD Contrast Control
DAC
R
CC
ADJ
. Data is shifted into the
LTC1427-50
1427 BD
I
OUT
5