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參數資料
| 型號： | LTC1329IS8-50#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數： | 1/8頁 |
| 文件大小： | 0K |
| 描述： | IC D/A CONV 8BIT MICROPWR 8-SOIC |
| 標準包裝： | 2,500 |
| 位數： | 8 |
| 數據接口： | 串行 |
| 轉換器數目： | 1 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 840µW |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
| 輸出數目和類型： | 1 電流，單極 |
| 采樣率（每秒）： | * |
1
LTC1329-10/
LTC1329-50/LTC1329A-50
Micropower 8-Bit Current
Output D/A Converter
s
Guaranteed Precision Full-Scale DAC Output
Current at 25
°C:
LTC1329A-50
50
A ±1%
LTC1329-10
10
A ±3%
LTC1329-50
50
A ±3%
s
Wide Output Voltage DC Compliance: – 15V to 2.5V
s
Wide Supply Range: 2.7V
≤ VCC ≤ 6.5V
s
Supply Current in Shutdown: 0.2
A
s
Low Supply Current: 75
A for LTC1329-10,
95
A for LTC1329-50/LTC1329A-50
s
Available in 8-Pin SO
s
Triple Mode
TM Interface Modes
1. Standard 3-Wire Mode
2. Pulse Mode 1-Wire Interface: Increment-Only
3. Pulse Mode 2-Wire Interface: Increment/Decrement
s
Can Read Back the 8-Bit DAC Value in 3-Wire Mode
s
DAC Powers Up at Midrange
s
DAC Contents Are Retained in Shutdown
FEATURES
DESCRIPTION
U
APPLICATIONS
U
s
LCD Contrast Control
s
Backlight Brightness Control
s
Battery Charger Current/Voltage Adjustment
s
Power Supply Voltage Adjustment
s
Trimmer Pot Elimination
TYPICAL APPLICATION
U
Digitally Controlled LCD Bias Generator
1
2
8
7
DOUT
DIN
IOUT
VCC
SHDN
CLK
LTC1329-50
GND
CS
47
F
1329 TA01
VOUT
–22V at 40mA
VIN
5V
200k
3
4
6
5
4.7
F
22
F
0.1
F
LT
1173
1N4148
1N5818
L1*
100
H
*GOWANDA GA10-103K OR
COILTRONICS CTX100-4
ILIM
VIN
FB
SW2
GND
SW1
220k
47
10.1k
MPU
(e.g., 8051)
P1.2
P1.1
P1.0
+
The LTC
1329-10/LTC1329-50/LTC1329A-50 are
micropower 8-bit current output D/A converters (DACs)
with an output range of 0
A to 10A for the LTC1329-10
and 0
A to 50A for the LTC1329-50/LTC1329A-50. The
DAC current output can be biased from – 15V to 2V or
– 15V to 2.5V in 3.3V and 5V systems, respectively. Supply
current is only 95
A for the LTC1329-50/LTC1329A-50
and 75
A for LTC1329-10. A shutdown mode drops the
supply current to 0.2
A.
The LTC1329 can communicate with external circuitry by
using one of three interface modes: standard 3-wire serial
mode and two pulse modes. Upon power-up, the internal
counter resets to 1000 0000B, the DAC output assumes
midrange and the chip is configured in 3-wire or pulse
mode depending on the signal level at CS.
In 3-wire mode, the system MPU can serially transfer 8-bit
data to and from the LTC1329. In pulse mode, the upper
six bits of the DAC output can be programmed for incre-
ment-only (1-wire interface) or increment/decrement
(2-wire interface) operation depending on the signal level
at DIN.
LTC1329 is available in 8-pin SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Triple Mode is a trademark of Linear Technology Corporation.
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