- 您现在的位置：买卖IC网 > PDF目录11675 > AD694ARZ-REEL (Analog Devices Inc)IC TRANSMITTER 4-20MA 16SOIC PDF资料下载
参数资料
| 型号： | AD694ARZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC TRANSMITTER 4-20MA 16SOIC |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | AD694ARZ-REELDKR |
AD694
REV. B
–5–
Table I. Precalibrated Ranges for the AD694
Input
Output
Voltage
Min
Range
Reference VS
Pin 9
Pin 4
Pin 8
0–2 V
4–20 mA
2 V
4.5 V
Pin 5
Pin 7
0–10 V
4–20 mA
2 V
12.5 V
Pin 5
Open
Pin 7
0–2.5 V
0–20 mA
2 V
5.0 V
≥3 V
Pin 5
Pin 7
0–12.5 V
0–20 mA
2 V
15.0 V
≥3 V
Open
Pin 7
0–2 V
4–20 mA
10 V
12.5 V
Pin 5
Open
0–10 V
4–20 mA
10 V
12.5 V
Pin 5
Open
0–2.5 V
0–20 mA
10 V
12.5 V
≥3 V
Pin 5
Open
0–12.5 V
0–20 mA
10 V
15.0 V
≥3 V
Open
BASIC CONNECTIONS: 12.5 V SINGLE-SUPPLY
OPERATION WITH 10 V FS
Figure 2 shows the minimal connections required for basic
operation with a 12.5 V power supply, 10 V input span,
4–20 mA output span, and a 10 V voltage reference. The buffer
amplifier is connected as a voltage follower to drive the V/I
converter by connecting FB (Pin 1) to –Sig (Pin 2). 4 mA On/
Off (Pin 9) is tied to ground (Pin 5) to enable the 4 mA offset
current. The AD694 can drive a maximum load RL = [VS – 2 V]
/20 mA, thus the maximum load with a 12.5 V supply is 525
.
SELECTING A 2 V FULL-SCALE INPUT
The 2 V full-scale option is selected by shorting Pin 4 (2 V FS)
to Pin 5 (Common). The connection should be as short as pos-
sible; any parasitic resistance will affect the precalibrated span
accuracy.
SELECTING THE 2 V VOLTAGE REFERENCE
The voltage reference is set to a 2 V output by shorting Pin 7 to
Pin 8 (10 V Force to 2 V Sense). If desired, the 2 V reference
can be set up for remote force and sense connection. Keep in
mind that the 2 V Sense line carries a constant current of 100
A
that could cause an offset error over long wire runs. The 2 V
reference option can be used with all supply voltages greater
than 4.5 V.
optional NPN pass transistor can be added to transfer most of
the power dissipation off-chip, to extend the temperature range
of operation.
The output stage is current-limited at approximately 38 mA to
protect the output from an overdrive at its inputs. The V/I will
allow linear operation to approximately 24 mA. The V/I con-
verter also has an open collector alarm (Pin 10) which warns of
open-circuit condition at the IOUT pin or of attempts to drive the
output to a voltage greater than VS – 2 V.
4 mA OFFSET GENERATOR
This circuit converts a constant voltage from the voltage
reference to a constant current of approximately 200
A. This
current is summed with the signal current at Pin 14 (BW
Adjust), to result in a constant 4 mA offset current at IOUT. The
4 mA Adj (Pin 6) allows the offset current to be adjusted to any
current in the range of 2 mA to 4.8 mA. Pin 9 (4 mA On/Off)
can shut off the offset current completely if it is lifted to 3.0 V or
more, allowing 0 to 20 mA operation of the AD694. In normal
4–20 mA operation, Pin 9 is connected to ground.
VOLTAGE REFERENCE
A 2 V or 10 V voltage reference is available for user applications,
selectable by pin-strapping. The 10 V option is available for
supply voltages greater than 12.5 V, the 2 V output is available
over the whole 4.5 V to 36 V power supply range. The reference
can source up to 5 mA for user applications. A boost transistor
can be added to increase the current drive capability of the 2 V
mode.
APPLYING THE AD694
The AD694 can easily be connected for either dual or single
supply operation, to operate from supplies as low as 4.5 V and
as high as 36 V. The following sections describe the different
connection configurations, as well as adjustment methods.
Table I shows possible connection options.
Figure 2. Minimal Connections for 0 V to 10 V Single-Ended Input, 4–20 mA Output, 10 V Reference Output
相关PDF资料 |
PDF描述 |
|---|---|
| VE-J3H-IY-F2 | CONVERTER MOD DC/DC 52V 50W |
| VE-J3H-IY-F1 | CONVERTER MOD DC/DC 52V 50W |
| VE-J3F-IZ-B1 | CONVERTER MOD DC/DC 72V 25W |
| LTK001CN8#PBF | IC THERMOCOUPL COMP& KIT 8DIP |
| VE-J3F-IY-F4 | CONVERTER MOD DC/DC 72V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD694BQ | 功能描述:IC TRANSMITTER 4-20MA 16-CDIP RoHS:否 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
| AD694BR | 制造商:Analog Devices 功能描述:IC TRANSMITTER 4-20MA |
| AD694BR-REEL | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single 36V 16-Pin SOIC W T/R |
| AD694BR-REEL7 | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single 36V 16-Pin SOIC W T/R 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| AD694BRZ | 功能描述:IC TRANSMITTER 4-20MA 16-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 传感器和探测器接口 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:74 系列:- 类型:触控式传感器 输入类型:数字 输出类型:数字 接口:JTAG，串行 电流 - 电源:100µA 安装类型:表面贴装 封装/外壳:20-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:20-TSSOP 包装:管件 |
发布紧急采购，3分钟左右您将得到回复。