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參數(shù)資料
| 型號(hào)： | LTC1454LCS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | DAC |
| 英文描述： | Dual 12-Bit Rail-to-Rail Micropower DACs |
| 中文描述： | DUAL, SERIAL INPUT LOADING, 14 us SETTLING TIME, 12-BIT DAC, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SO-16 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 246K |
| 代理商： | LTC1454LCS |
8
LTC1454/LTC1454L
OPERATIOU
Serial Interface
The data on the D
IN
input is loaded into the shift register
on the rising edge of the clock. Data is loaded as one 24-bit
word, DAC A first, then DAC B. The MSB is loaded first for
each DAC. The DAC registers load the data from the shift
register when CS/LD is pulled high. The CLK is disabled
internally when CS/LD is high. Note: CLK must be low
before CS/LD is pulled low to avoid an extra internal clock
pulse.
The buffered output of the 24-bit shift register is available
on the D
OUT
pin which swings from ground to V
CC
.
Multiple LTC1454/LTC1454Ls may be daisy-chained to-
gether by connecting the D
OUT
pin to the D
IN
pin of the next
chip, while the CLK and CS/LD signals remain common to
all chips in the daisy-chain. The serial data is clocked to all
of the chips, then the CS/LD signal is pulled high to update
all of them simultaneously.
Reference
The LTC1454L has an internal reference of 1.22V with a full
scale of 2.5V (gain of 2 configuration). The LTC1454
includes an internal 2.048V reference, making 1LSB equal
to 1mV (gain of 2 configuration). When the buffer gain is
2, the external reference must be less than V
CC
/2 and be
capable of driving the 15k minimum DAC resistor ladder.
With a gain of 1 configuration the external reference must
be less than V
CC
– 1.5V.
Voltage Output
The rail-to-rail buffered output of the LTC1454 family can
source or sink 5mA when operating with a 5V supply while
pulling to within 300mV of the positive supply voltage or
ground. The output swings to within a few millivolts of
either supply rail when unloaded and has an equivalent
output resistance of 40
when driving a load to the rails.
The output can drive 1000pF without going into oscilla-
tion.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1454LI | Dual 12-Bit Rail-to-Rail Micropower DACs |
| LTC1454CS | Dual 12-Bit Rail-to-Rail Micropower DACs |
| LTC1454C | Automotive Catalog Quad Micropower LinCMOS(TM) Voltage Comparators 14-SOIC -40 to 125 |
| LTC1454I | Low-Power LinCMOS(TM) Quad Comparator with Totem Pole Output 20-LCCC -55 to 125 |
| LTC1454LIN | Dual 12-Bit Rail-to-Rail Micropower DACs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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