參數(shù)資料
型號： EVAL-AD421EB
廠商： Analog Devices, Inc.
英文描述： Loop-Powered 4 mA to 20 mA DAC
中文描述： 回路供電4毫安到20毫安援
文件頁數(shù)： 12/14頁
文件大?。?/td> 171K
代理商： EVAL-AD421EB
AD421
–
12
–
REV. C
DV
DD
AV
DD
REF IN
CS
DATA OUT
SCLK
DATA IN
AGND
DGND
MCLK IN
MCLK OUT
AD7714/
AD7715
ANALOG
TO
DIGITAL
CONVERTER
SENSORS
RTD
mV TC
REF OUT1
BOOST
V
CC
LV
COMP
DRIVE
LOOP
RTN
REF OUT2
REF IN
CLOCK
LATCH
DATA
COM
C1
C2
C3
LOOP
POWER
0.01 F
DN25D
2.2 F
3.3V
1.25V
4.7 F
AMBIENT
TEMP
SENSOR
AD421
MICROCONTROLLER
V
CC
GND
WAVEFORM
SHAPER
BANDPASS
FILTER
HART
MODEM
BELL 202
0.1 F
0.01 F
1k
1000pF
C
C
*
HT20C12/20C15
4.7 F
100k
*FOR SELECTION OF C
C
, REFER TO AN-534
Figure 17. AD421 in HART Transmitter Application
across R2. The ratio of R1 to R2 determines the current that
flows in the load resistor R
L
.
I
L
= [1 +
R
1
/R
2]
×
I
PROG
, where I
L
is the current that flows in the load resistor R
L
and I
PROG
is the
current programmed to the AD421. R1 and R2 are external to
the AD421 and will need to be matched resistors to obtain a
highly accurate current source.
Current Source
Figure 18 shows an application circuit for the AD421 being
used as a current source. The current programmed to the
AD421 (4 mA to 20 mA) will develop a voltage across R1.
This same voltage due to negative feedback will be generated
LOOP
RTN
R2
R
L
R1
C1
C2
C3
COM
V
CC
LV
2.2 F
COM
DRIVE
COMP
BOOST
0.01 F
0.01 F
0.0033 F
LATCH
CLOCK
DATA
REF IN
REF OUT2
REF OUT1
4.7 F
COM
AD421
+5V
10k
10k
10k
CLOCK
LATCH
DATA
V
S
RETURN
5 VOLT
REGULATOR
OUT
IN
V
S
COM
Figure 18. AD421 in Programmable Current Source/Sink
相關(guān)PDF資料
PDF描述
Eval-AD5025EBZ Fully Accurate 12-/14-/16-Bit VOUT DAC SPI Interface 2.7 V to 5.5 V in a TSSOP
Eval-AD5045EBZ Fully Accurate 12-/14-/16-Bit VOUT DAC SPI Interface 2.7 V to 5.5 V in a TSSOP
Eval-AD5065EBZ Fully Accurate 12-/14-/16-Bit VOUT DAC SPI Interface 2.7 V to 5.5 V in a TSSOP
EVAL-AD5066EBZ Fully Accurate 16-Bit UnBuffered VOUT DAC SPI Interface 2.7 V to 5.5 V in a TSSOP
EVAL-AD5379EB 40-Channel, 14-Bit, Parallel and Serial Input, Bipolar Voltage-Output DAC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EVAL-AD5025EBZ 制造商:AD 制造商全稱:Analog Devices 功能描述:Fully Accurate 12-/14-/16-Bit VOUT DAC SPI Interface 2.7 V to 5.5 V in a TSSOP
EVAL-AD5045EBZ 制造商:AD 制造商全稱:Analog Devices 功能描述:Fully Accurate 12-/14-/16-Bit VOUT DAC SPI Interface 2.7 V to 5.5 V in a TSSOP
EVAL-AD5060EB 制造商:Analog Devices 功能描述:EVAL BD FOR AD506X DAC 14-/16BIT, SERL INPUT - Bulk
EVAL-AD5060EBZ 功能描述:BOARD EVAL FOR AD5060 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:nanoDAC™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581
EVAL-AD5061EBZ 功能描述:BOARD EVALUATION AD5061 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:nanoDAC™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*