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參數(shù)資料
| 型號(hào)： | XTR112U |
| 英文描述： | 4-20mA CURRENT TRANSMITTERS with Sensor Excitation and Linearization |
| 中文描述： | 的4 - 20mA的傳感器激勵(lì)和線性電流遞質(zhì) |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大?。?/td> | 255K |
| 代理商： | XTR112U |
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14
XTR112, XTR114
FIGURE 5. Input Bypassing Technique with Linearization.
14
11
12
13
4
3
2
R
G
XTR112
XTR114
R
CM
7
1
0.01
μ
F
0.01
μ
F
0.01
μ
F
R
Z
(1)
RTD
6
NOTE: (1) Bypass capacitors can be connected
to either the I
RET
pin or the I
O
pin.
R
G
R
G
V
IN
–
V
IN
+
V
LIN
I
R1
I
R2
V
REG
V+
I
RET
I
O
E
B
8
0.01
μ
F
9
10
1k
R
LIN1
R
LIN2
1k
XTR112
XTR114
7
V+
I
O
E
B
V
PS
10
0.01
μ
F
R
L
D
1(1)
9
8
NOTE: (1) Zener Diode 36V: 1N4753A or General
Semiconductor Transorb
TM
1N6286A. Use lower
voltage zener diodes with loop power supply
voltages less than 30V for increased protection.
See “Over-Voltage Surge Protection.”
Maximum V
must be
less than minimum
voltage rating of zener
diode.
The diode bridge causes
a 1.4V loss in loop supply
voltage.
1N4148
Diodes
6
I
RET
FIGURE 4. Reverse Voltage Operation and Over-Voltage Surge Protection.
Most surge protection zener diodes have a diode character-
istic in the forward direction that will conduct excessive
current, possibly damaging receiving-side circuitry if the
loop connections are reversed. If a surge protection diode is
used, a series diode or diode bridge should be used for
protection against reversed connections.
RADIO FREQUENCY INTERFERENCE
The long wire lengths of current loops invite radio frequency
interference. RF can be rectified by the sensitive input
circuitry of the XTR112 and XTR114 causing errors. This
generally appears as an unstable output current that varies
with the position of loop supply or input wiring.
If the RTD sensor is remotely located, the interference may
enter at the input terminals. For integrated transmitter as-
semblies with short connection to the sensor, the interfer-
ence more likely comes from the current loop connections.
Bypass capacitors on the input reduce or eliminate this input
interference. Connect these bypass capacitors to the I
RET
terminal as shown in Figure 5. Although the dc voltage at the
I
RET
terminal is not equal to 0V (at the loop supply, V
PS
) this
circuit point can be considered the transmitter’s “ground.”
The 0.01
μ
F capacitor connected between V+ and I
O
may
help minimize output interference.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XTR112UA | 4-20mA CURRENT TRANSMITTERS with Sensor Excitation and Linearization |
| XTR114U | 4-20mA CURRENT TRANSMITTERS with Sensor Excitation and Linearization |
| XTR115UA | 4-20mA CURRENT LOOP TRANSMITTERS |
| XTR116 | 4-20mA CURRENT LOOP TRANSMITTERS |
| XTR115U | 4-20mA CURRENT LOOP TRANSMITTERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XTR112U/2K5 | 功能描述:IC 4-20MA I-TRANSMITTER 14-SOIC RoHS:是 類別: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:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型: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 |
| XTR112UA | 功能描述:電流靈敏放大器 4-20mA Crnt Trnsmtr w/Sensor Exc & Lin RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| XTR112UA/2K5 | 功能描述:IC 4-20MA I-TRANSMITTER 14-SOIC RoHS:是 類別: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:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型: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 |
| XTR112UA/2K5E4 | 功能描述:電流靈敏放大器 4-20mA Crnt Trnsmtr w/Sensor Exc & Lin RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| XTR112UAE4 | 功能描述:電流靈敏放大器 4-20mA Crnt Trnsmtr w/Sensor Exc & Lin RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
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