參數(shù)資料
型號(hào)： LTC1453CS8
廠商： LINEAR TECHNOLOGY CORP
元件分類： DAC
英文描述： Quad, Micropower, Push-Pull Outputs, LinCMOS(TM) Voltage Comparator 14-TSSOP -40 to 85
中文描述： SERIAL INPUT LOADING, 14 us SETTLING TIME, 12-BIT DAC, PDSO8
封裝： 0.150 inch, PLASTIC, SO-8
文件頁數(shù)： 9/12頁
文件大?。?/td> 173K
代理商： LTC1453CS8
9
LTC1451
LTC1452/LTC1453
An Isolated 4mA to 20mA Process Controller
Has 3.3V Minimum Loop Voltage
11451/2/3 TA04
3k
10k
1k
45k
5k
90k
5k
Q1
2N3440
R
S
10
V
3.3V TO 30V
I
OUT
OUT
IN
CLK
D
IN
CS/LD
CLK
D
IN
CS/LD
CLK
D
IN
CS/LD
V
CC
V
OUT
1
μ
F
LTC1453
4N28
OPTO-ISOLATORS
3.3V
500
LT
1121-3.3
FROM
OPTO-
ISOLATED
INPUTS
V
REF
+
LT1077
–
This circuit shows how to use an LTC1453 to make an
opto-isolated digitally controlled 4mA to 20mA process
controller. The controller circuitry, including the opto-
isolation, is powered by the loop voltage that can have a
wide range of 3.3V to 30V. The 1.22V reference output of
the LTC1453 is used for the 4mA offset current and V
OUT
is used for the digitally controlled 0mA to 16mA current.
R
S
is a sense resistor and the op amp modulates the
transistor Q1 to provide the 4mA to 20mA current through
this resistor. The potentiometers allow for offset and full-
scale adjustment. The control circuitry dissipates well
under the 4mA budget at zero-scale.
Note that although these DACs have internal Schmitt
triggers and are suitable for use with slow rising edges
such as produced by the above optoisolator, the use of
optoisolators in a daisy-chained topology requires the
addition of a gate or the use of a fast isolator on the clock
signal. Setup and hold times between D
OUT
and D
IN
are not
guaranteed unless a clock edge with a rise time of less than
100ns is provided.
TYPICAL APPLICATIO S
相關(guān)PDF資料
PDF描述
LTC1453IS8 12-Bit Rail-to-Rail Micropower DACs in SO-8
LTC1451 12-Bit Rail-to-Rail Micropower DACs in SO-8(5V，12位滿幅度微功耗電壓輸出數(shù)模轉(zhuǎn)換器（SO-8封裝）)
LTC1452 12-Bit Rail-to-Rail Micropower DACs in SO-8(3V-5V，12位滿幅度微功耗電壓輸出數(shù)模轉(zhuǎn)換器（SO-8封裝）)
LTC1453 12-Bit Rail-to-Rail Micropower DACs in SO-8(3V，12位滿幅度微功耗電壓輸出數(shù)模轉(zhuǎn)換器（SO-8封裝）)
LTC1454CN 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
LTC1453CS8#PBF 功能描述:IC D/A CONV 12BIT R-R 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 設(shè)置時(shí)間:4µs 位數(shù):12 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-uMAX 包裝:管件 輸出數(shù)目和類型:2 電壓，單極 采樣率（每秒）:* 產(chǎn)品目錄頁面:1398 (CN2011-ZH PDF)
LTC1453CS8#PBF 制造商:Linear Technology 功能描述:D/A Converter (D-A) IC
LTC1453CS8#TR 功能描述:IC DAC 12BIT R-R SINGLE 3V 8SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色產(chǎn)品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 標(biāo)準(zhǔn)包裝:91 系列:- 設(shè)置時(shí)間:4µs 位數(shù):10 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:8 電壓電源:單電源 功率耗散（最大）:2.7mW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-DFN-EP（4x3） 包裝:管件 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:*
LTC1453CS8#TRPBF 功能描述:IC D/A CONV 12BIT R-R 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色產(chǎn)品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 標(biāo)準(zhǔn)包裝:91 系列:- 設(shè)置時(shí)間:4µs 位數(shù):10 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:8 電壓電源:單電源 功率耗散（最大）:2.7mW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-DFN-EP（4x3） 包裝:管件 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:*
LTC1453CS8PBF 制造商:Linear Technology 功能描述:12-Bit Rail-to-Rail Micropower DAC SOIC8
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