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參數(shù)資料
| 型號： | XTR101BG |
| 元件分類： | 運(yùn)動控制電子 |
| 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)： | 9/15頁 |
| 文件大?。?/td> | 195K |
| 代理商： | XTR101BG |
XTR101
9
40
0.3244
–
e
IN
e'
2
+
1mA
1mA
–
+
R
4
V
4
2mA
–
+
–
+
–
+
–
+
–
+
–
+
2mA
–
+
–
+
–
+
–
+
R
T
e'
2
R
T
e
IN
1mA
1mA
R
4
V
4
2mA
e'
2
R
4
V
4
e
IN
2mA
e
IN
2mA
2mA
e'
2
R
4
V
4
e
IN
= (e'
+V
4
)
V
4
= 1mA
X
R
4
e'
2
= 1mA
X
R
T
(b) Suppressed Zero Range
e
IN
= (e'
–V
4
)
V
4
= 1mA
X
R
4
e'
2
= 1mA
X
R
T
(a) Elevated Zero Range
e
IN
= (e'
2
–V
4
)
V
4
= 2mA
X
R
4
(c) Elevated Zero Range
e
IN
= (e'
2
+V
4
)
V
4
= 2mA
X
R
4
(d) Suppressed Zero Range
FIGURE 8. Elevation and Suppression Circuits.
APPLICATION INFORMATION
The small size, low offset voltage and drift, excellent linear-
ity, and internal precision current sources, make the XTR101
ideal for a variety of two-wire transmitter applications. It can
be used by OEMs producing different types of transducer
transmitter modules and by data acquisition systems manu-
facturers who gather transducer data. Current mode trans-
mission greatly reduces noise interference. The two-wire
nature of the device allows economical signal conditioning
at the transducer. Thus the XTR101 is, in general, very
suitable for individualized and special purpose applications.
EXAMPLE 1
RTD Transducer shown in Figure 9.
Given a process with temperature limits of +25
°
C and
+150
°
C, configure the XTR101 to measure the temperature
with a platinum RTD which produces 100
at 0
°
C and
200
at +266
°
C (obtained from standard RTD tables).
Transmit 4mA for +25
°
C and 20mA for +150
°
C.
COMPUTING R
S
:
The sensitivity of the RTD is
R/
T = 100
/266
°
C. When
excited with a 1mA current source for a 25
°
C to 150
°
C range
(i.e., 125
°
C span), the span of e
IN
is 1mA
X
(100
/266
°
C)
X
125
°
C = 47mV =
e
IN
.
From equation 1, R
S
=
R
S
=
=
Span adjustment (calibration) is accomplished by trimming
R
S
.
COMPUTING R
4
:
At +25
°
C, e'
2
= 1mA (R
T
+
R
T
)
= 1mA [100
+
X
25
°
C]
= 1mA (109.4
) = 109.4mV
In order to make the lower range limit of 25
°
C correspond
to the output lower range limit of 4mA, the input circuitry
shown in Figure 9 is used.
e
IN
, the XTR101 differential input, is made 0 at 25
°
C or
e'
2 25
°
C
– V
4
= 0
thus, V
4
= e'
2 25
°
C
= 109.4mV
R
4
= = 109.4mV
1mA
COMPUTING R
2
AND CHECKING CMV:
At +25
°
C, e'
2
= 109.4mV
At +150
°
C, e'
2
= 1mA (R
T
+
R
T
)
= 1mA [100
+(
X
150
°
C)]
= 156.4mV
Since both e'
2
and V
4
are small relative to the desired 5V
common-mode voltage, they may be ignored in computing
R
2
as long as the CMV is met.
R
2
= 5V/2mA = 2.5k
e
2
min = 5V + 0.1094V
e
2
max = 5V + 0.1564V
e
1
= 5V + 0.1094V
I
O
/
e
IN
– 0.016
40
40
16mA/47mV – 0.016
266
°
C
1mA
V
266
°
C
The +4V to +6V CMV
requirement is met.
– 0 +
e
IN
(V)
i
0
(
20
15
10
5
0
Elevated
Zero
Range
Suppressed
Zero
Range
Span Adjust
FIGURE 7. Elevation and Suppression Graph.
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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