参数资料
型号: LTC1427CS8-50#TRPBF
厂商: Linear Technology
文件页数: 5/8页
文件大小: 0K
描述: IC D/A CONV 10BIT W/SMBUS 8-SOIC
标准包装: 2,500
位数: 10
数据接口: 串行
转换器数目: 1
电压电源: 单电源
功率耗散(最大): 550µW
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
输出数目和类型: 1 电流,单极
采样率(每秒): *
5
LTC1427-50
PIN FUNCTIONS
UU
U
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 IOUT is reinstated.
AD1, AD0 (Pins 2, 3): Address Selection Pins. Tie these
two pins to either VCC or GND to select one of four SMBus
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-
up resistor or current source to VCC. Data is shifted into the
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.
IOUT (Pin 7): DAC Current Output.
VCC (Pin 8): Voltage Supply. This supply must be kept free
from noise and ripple by bypassing directly to the ground
plane.
SMBUS
INTERFACE
3-BIT
LATCH
REGISTER A
SCL
SDA
AD0
AD1
EN1
10-BIT
LATCH
10-BIT
CURRENT
DAC
1-BIT LATCH
VOLTAGE
REFERENCE
REGISTER C
REGISTER B
31
2
10
8
EN2
POWER-ON
RESET
SHDN
SD
1427 BD
RADJ
IOUT
SD
BLOCK DIAGRAM
W
FU CTIO TABLES
U
AD1
AD0
SMBus Address Location
DAC Power-Up Value
Application
L
0101101
Zero-Scale
CCFL Backlight Control
L
H
0101111
Zero-Scale
General Purpose
H
L
0101110
Zero-Scale
General Purpose
H
0101100
Midscale
LCD Contrast Control
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