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參數(shù)資料
| 型號(hào)： | XTR101BG |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | A/D Converter (A-D) IC; Resolution (Bits):20; Sample Rate:200SPS; Input Channels Per ADC:2; Input Channel Type:Differential; Data Interface:Serial; Package/Case:20-SOIC; Leaded Process Compatible:No; No. of Bits:20 RoHS Compliant: No |
| 中文描述： | 精密，低漂移的4 - 20mA二線制變送器 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大小： | 195K |
| 代理商： | XTR101BG |
XTR101
11
FIGURE 11. Cold Junction Compensation Circuit.
V
5
–
1mA
R
5
+
V
6
–
R
6
+
V
D
+
–
D
FIGURE 12. Optional Filtering.
the thermocouple impedance goes very high. The circuits of
Figures 16 and 17 inherently have down scale indication.
When the impedance of the thermocouple gets very large
(open) the bias current flowing into the + input (large
impedance) will cause I
O
to go to its lower range limit value
(about 3.8mA). If up scale indication is desired the circuit of
Figure 18 should be used. When the T
C
opens the output will
go to its upper range limit value (about 25mA or higher).
OPTIONAL INPUT OFFSET VOLTAGE TRIM
The XTR101 has provisions for nulling the input offset
voltage associated with the input amplifiers. In many appli-
cations the already low offset voltages (30
μ
V max for the B
grade, 60
μ
V max for the A grade) will not need to be nulled
at all. The null adjustment can be done with a potentiometer
at pins 1, 2 and 14 as shown in Figures 5 and 6. Either of
these two circuits may be used. NOTE: It is not recom-
mended to use this input offset voltage nulling
capability for
elevation or suppression. See the Signal Suppression and
Elevation section for the proper techniques.
OPTIONAL BANDWIDTH CONTROL
Low-pass filtering is recommended where possible and can
be done by either one of two techniques shown in Figure 12.
C
2
connected to pins 3 and 4 will reduce the bandwidth with
a cutoff frequency given by,
15.9
f
CO
=
This method has the disadvantage of having f
CO
vary with
R
1
, R
2
, R
3
, R
4
, and it may require large values of R
3
and R
4
.
The other method, using C
1
, will use smaller values of
capacitance and is not a function of the input resistors. It is,
however, more subject to nonlinear distortion caused by
slew rate limiting. This is normally not a problem with the
slow signals associated with most process control transduc-
ers. The relationship between C
1
and f
CO
is shown in the
Typical Performance Curves.
(R
1
+ R
2
+ R
3
+ R
4
) (C
2
+ 3pF)
FIGURE 13. 0-20mA Output Converter.
APPLICATION CIRCUITS
3
4
+
–
XTR101
1mA
13
12
NOTE: (1) R
3
and R
4
should be equal if used.
1mA
R
2
11
0.0047μF
C
1
R
4
(1)
R
3
(1)
C
2
R
1
Gain
e
2
OUTPUT STAGE
Internally e
NOISE RTI
= e
2
INPUT STAGE
+
2
XTR101
R
2
500
100pF
MC1403A
OPA27
V
R
= 2.5V
+
–
V–
V+
I
(4-20mA)
I
O
(1)
(0-20mA)
R
1
125
NOTE: (1) I
O
=
1 + R
O
– = 1.25 I
O
– 5mA
R
2
1
V
R
2
Other conversions are readily achievable by
changing the reference and ratio of R
1
to R
2
.
Voltage
Reference
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XTR110BG | PRECISION VOLTAGE-TO-CURRENT CONVERTER/TRANSMITTER |
| XTR110KP | PRECISION VOLTAGE-TO-CURRENT CONVERTER/TRANSMITTER |
| XTR110KU | PRECISION VOLTAGE-TO-CURRENT CONVERTER/TRANSMITTER |
| XTR110 | A/D Converter (A-D) IC; Resolution (Bits):24; Sample Rate:606SPS; Input Channels Per ADC:2; Input Channel Type:Differential; Data Interface:Serial, 3-Wire; Package/Case:20-DIP; Interface Type:Serial; Leaded Process Compatible:No RoHS Compliant: No |
| XTR110AG | PRECISION VOLTAGE-TO-CURRENT CONVERTER/TRANSMITTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XTR101L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCC Precision Low Drift 4MA to 20MA Two-Wire Transmitter |
| XTR103 | 制造商:BB 制造商全稱:BB 功能描述:4-20mA Current Transmitter with RTD EXCITATION AND LINEARIZATION |
| XTR103AP | 功能描述:電流靈敏放大器 4-20mA w/RTD 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 |
| XTR103AU | 功能描述:電流靈敏放大器 4-20mA w/RTD 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 |
| XTR103BP | 制造商:BB 制造商全稱:BB 功能描述:4-20mA Current Transmitter with RTD EXCITATION AND LINEARIZATION |
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