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參數(shù)資料
| 型號： | XTR103AU |
| 英文描述： | 4-20mA Current Transmitter with RTD EXCITATION AND LINEARIZATION |
| 中文描述： | 4 - 20mA電流變送器的RTD激勵和線性化 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 222K |
| 代理商： | XTR103AU |
XTR103
9
There are special zener diode types specifically designed to
provide a very low impedance clamp and withstand large
energy surges. These devices normally have a diode charac-
teristic in the forward direction which also protects against
reversed loop connections. As noted earlier, reversed loop
connections would produce a large loop current, possibly
damaging R
L
.
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 XTR103 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 often reduce or eliminate this
interference. Connect these bypass capacitors to the I
O
terminal as shown in Figure 7. Although the DC voltage at
the I
O
terminal is not equal to 0V (at the loop supply, V
PS
)
this circuit point can be considered the transmitter’s “ground.”
FIGURE 5. Reverse Voltage Protection.
XTR103
7
V+
I
O
E
B
V
PS
1N4148
D
1
10
0.01μF
R
L
D
1N4001
15
11
Use either D
or D
.
See “Reverse Voltage Protection.”
FIGURE 6. Over-Voltage Surge Protection.
XTR103
V+
I
O
E
B
V
PS
(1)
Maximum V
must be less
than minimum voltage rating
of zener diode.
NOTE: (1) Zener diode 36V: 1N4753A
or
General Semiconductor Transorb
1N6286A
Use lower voltage zener diodes with loop
power supply voltages less than 30V for
increased protection.
10
15
11
7
R
L
相關PDF資料 |
PDF描述 |
|---|---|
| XTR103BP | A/D Converter (A-D) IC; Resolution (Bits):16; Sample Rate:100SPS; Input Channels Per ADC:4; Input Channel Type:Differential; Data Interface:Serial; Package/Case:; DNL +/-:0.5LSB; Leaded Process Compatible:No; No. of Bits:16 RoHS Compliant: Yes |
| XTR103BU | 4-20mA Current Transmitter with RTD EXCITATION AND LINEARIZATION |
| XTR104 | A/D Converter (A-D) IC; Resolution (Bits):20; Sample Rate:100SPS; Input Channels Per ADC:4; Input Channel Type:Differential; Data Interface:Serial; Package/Case:24-SOIC; Leaded Process Compatible:No; No. of Bits:20 RoHS Compliant: Yes |
| XTR104AP | 4-20mA Current Transmitter with BRIDGE EXCITATION AND LINEARIZATION |
| XTR104AU | A/D Converter (A-D) IC; Resolution (Bits):16; Sample Rate:100SPS; Input Channels Per ADC:1; Input Channel Type:Differential; Data Interface:Serial; Package/Case:20-DIP; DNL +/-:0.5LSB; Leaded Process Compatible:No; No. of Bits:16 RoHS Compliant: No |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XTR103BP | 制造商:BB 制造商全稱:BB 功能描述:4-20mA Current Transmitter with RTD EXCITATION AND LINEARIZATION |
| XTR103BU | 制造商:Texas Instruments 功能描述: |
| XTR104 | 制造商:BB 制造商全稱:BB 功能描述:4-20mA Current Transmitter with BRIDGE EXCITATION AND LINEARIZATION |
| XTR104AP | 制造商:BB 制造商全稱:BB 功能描述:4-20mA Current Transmitter with BRIDGE EXCITATION AND LINEARIZATION |
| XTR104AU | 制造商:Rochester Electronics LLC 功能描述:4-20 MA XMITTER - Bulk |
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