- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄11656 > AD694BRZ-REEL7 (Analog Devices Inc)IC TRANSMITTER 4-20MA 16-SOIC PDF資料下載
參數(shù)資料
| 型號(hào)： | AD694BRZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 3/16頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC TRANSMITTER 4-20MA 16-SOIC |
| 標(biāo)準(zhǔn)包裝： | 400 |
| 類(lèi)型： | 電流發(fā)送器 |
| 輸入類(lèi)型： | 電壓 |
| 輸出類(lèi)型： | 電壓 |
| 電流 - 電源： | 23mA |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC W |
| 包裝： | 帶卷 (TR) |
第1頁(yè)第2頁(yè)當(dāng)前第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
AD694
REV. B
–11–
Figure 13. Digital to 4–20 mA Interface Using a Current Steering DAC
Figure 14. Single-Supply Digital Input to 4–20 mA Output
code dependent, and the response time of the circuit will be de-
termined by the reaction of the voltage reference. The supply
voltage to the AD7541A should be kept close to 15 V. If VS is
reduced significantly from 15 V the differential nonlinearity of
the DAC will increase and the linearity will be degraded.
In some applications it is desirable to have some underrange and
overrange in the 4–20 mA output. For example, assume an over
and under range capability of
±5% of span is needed, then the
output current range corresponding to the full scale of the DAC
is 3.2 mA to 20.8 mA. To accomplish this, the span of the
AD694 would be increased 10% to 17.6 mA by adding a nonin-
verting gain of 1.1 to the buffer amplifier. The 4 mA offset
would then be reduced by 0.8 mA, by utilizing the adjustment
scheme explained in Adjusting 4 mA Zero section. Then a digi-
tal input from all zero code to full scale would result in an out-
put current of 3.2 mA to 20.8 mA.
LOW COST SENSOR TRANSMITTER
Sensor bridges typically output differential signals in the 10 mV
to 100 mV full-scale range. With an AD694, a dual op amp, and
some resistors, an instrumentation amplifier front end can be
added which easily handles these types of low level signals.
The traditional 3 op amp instrumentation amplifier is built us-
ing an AD708 dual op amp for the front end, and the AD694’s
buffer amplifier is used for the subtractor circuit, as shown in
Figure 15. The AD694’s 2 V reference is used to provide a
“ground” of 2 V that ensures proper operation of the in amp
over a wide common mode range. The reference pin of the
subtractor circuit is tied to the 2 V reference (point C). A 2 k
pull-down resistor ensures that the voltage reference will be able
to sink any subtractor current. The 2 V FS (Pin 4) is attached to
the 2 V reference; this offsets the input range of the V/I con-
verter 2 volts positive, to match the “ground” of the in amp.
The AD694 will now output a 4–20 mA output current for a
0 V to 2 V differential swing across VA. The gain of the in amp
front end is adjusted so that the desired full-scale input signal at
VIN results in a VA of 2 V. For example a sensor that has a 100
mV full scale will require a gain of 20 in the front end. The gain
is determined according to the equation:
G = [2RS/Rg] + 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD9814JRRL | IC CCD SIGNAL PROC 14BIT 28-SOIC |
| D38999/26JF32SC | CONN PLUG 32POS STRAIGHT W/SCKT |
| CS3100A-24-58S | CONN RCPT 13POS WALL MNT W/SCKT |
| MCR908JK3ECPE | IC MCU FLASH 8BIT RC OSC 20-DIP |
| MS3110P22-21S | CONN RCPT 21POS WALL MNT W/SCKT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD694JN | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single 36V 16-Pin PDIP Tube 制造商:Analog Devices 功能描述:TRANSMITTER 420MA SMD DIP16 694 |
| AD694JN | 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEAR |
| AD694JNZ | 功能描述:IC TRANSMITTER 4-20MA 16-DIP RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 傳感器和探測(cè)器接口 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:74 系列:- 類(lèi)型:觸控式傳感器 輸入類(lèi)型:數(shù)字 輸出類(lèi)型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類(lèi)型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 |
| AD694JR | 功能描述:IC TRANSMITTER 4-20MA 制造商:analog devices inc. 系列:- 包裝:散裝 零件狀態(tài):上次購(gòu)買(mǎi)時(shí)間 類(lèi)型:電流發(fā)送器 輸入類(lèi)型:電壓 輸出類(lèi)型:電壓 接口:- 電流 - 電源:23mA 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:16-SOIC 標(biāo)準(zhǔn)包裝:1 |
| AD694KR | 功能描述:IC TRANSMITTER 4-20MA 制造商:analog devices inc. 系列:- 包裝:散裝 零件狀態(tài):上次購(gòu)買(mǎi)時(shí)間 類(lèi)型:電流發(fā)送器 輸入類(lèi)型:電壓 輸出類(lèi)型:電壓 接口:- 電流 - 電源:23mA 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:16-SOIC 標(biāo)準(zhǔn)包裝:1 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。