參數(shù)資料
型號(hào)： LTC1329ACS8-50#TR
廠商： Linear Technology
文件頁(yè)數(shù)： 1/8頁(yè)
文件大?。?/td> 0K
描述： IC DAC 8BIT MICROPOWER 8SOIC
標(biāo)準(zhǔn)包裝： 2,500
位數(shù)： 8
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)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(yīng)商設(shè)備封裝： 8-SOIC
包裝： 帶卷 (TR)
輸出數(shù)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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