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参数资料
| 型号： | LTC1427CS8-50#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC D/A CONV 10BIT W/SMBUS 8-SOIC |
| 标准包装： | 100 |
| 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： | 管件 |
| 输出数目和类型： | 1 电流，单极 |
| 采样率（每秒）： | * |
| 产品目录页面： | 1352 (CN2011-ZH PDF) |
1
LTC1427-50
Micropower, 10-Bit Current
Output DAC with SMBus
Serial Interface
1
2
3
4
8
7
6
5
1427 TA02
C1
1
F
1
F
1
2
5
6
4
3
4700pF
VCC
3.3V
VOUT*
*VOUT = 12.7V TO 24V IN 11mV STEPS
15mA (2 CELLS)
35mA ( 3 CELLS)
L1 = 10
H SUMIDA CD43
MURATA-ERIE LQH3C
OR COILCRAFT DO1608
D1 =MBR0530
100k
D1
2 TO 4
CELLS
L1
LTC1427-50
R1
226k
1%
R2
12.1k
1%
SHDN
AD1
AD0
GND
VCC
IOUT
SCL
SDA
P1.2
P1.1
P1.0
VIN
VC
GND
LT1317
SW
FB
SHDN
PU
(e.g., 8051)
TYPICAL APPLICATION
U
Digitally Controlled LCD Bias Generator
FEATURES
DESCRIPTION
U
s
LCD Contrast and Backlight Brightness Control
s
Power Supply Voltage Adjustment
s
Battery Charger Voltage/Current Adjustment
s
GaAs FET Bias Adjustment
s
Trimmer Pot Elimination
The LTC
1427-50 is a micropower, 10-Bit current output
DAC with an output range of 0
A to 50A. The DAC output is
guaranteed monotonic and DNL is less than 0.9LSB under all
operating conditions. Full-scale accuracy is
±2.5% over
the commercial temperature range. The LTC1427-50 oper-
ates with power supply voltages from 2.7V to 5.5V and the
DAC current source output can be biased from (VCC – 1.3V)
to – 15V.
The LTC1427-50 communicates with external circuitry by
using the SMBus serial interface. It acts as an SMBus slave
device using one of four selectable SMBus addresses set by
the two address pins AD0 and AD1 .
On power-up, the DAC output assumes midrange or zero
scale, depending on the logic state of the two address pins.
The LTC1427-50 can be shut down through the SHDN pin or
by setting the SHDN bit = 1 in the SMBus command byte.
Digital data for the DAC output is retained internally and the
supply current drops to 10
A typically when in shutdown.
The LTC1427-50 is available in an 8-pin SO package.
APPLICATIONS
U
s
Precision 50
A, ±1.5% Initial Full-Scale Output
Current,
±2.5% Over Temperature
s
Wide Output Voltage DC Compliance: – 15V to
(VCC – 1.3V)
s
Wide Supply Range: 2.7V
≤ VCC ≤ 5.5V
s
Supply Current in Shutdown: 10
A Typ
s
Low Supply Current: 115
A Typ
s
Available in 8-Pin SO
s
SMBus Serial Interface
s
Four Selectable SMBus Addresses
s
DAC Powers Up at Zero or Midscale
s
DAC Contents Are Retained in Shutdown
, LTC and LT are registered trademarks of Linear Technology Corporation.
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