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參數(shù)資料
| 型號： | XTR101AU |
| 元件分類： | 運動控制電子 |
| 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-DIP; Leaded Process Compatible:No; No. of Bits:20; No. of Channels:2 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)： | 5/15頁 |
| 文件大?。?/td> | 195K |
| 代理商： | XTR101AU |
XTR101
5
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
°
C, +V
CC
= 24VDC, unless otherwise noted.
10
1
10
100
Frequency (Hz)
1k
10k
0
INPUT VOLTAGE NOISE DENSITY vs FREQUENCY
100k
60
50
40
30
20
I
0
Frequency (Hz)
INPUT CURRENT NOISE DENSITY vs FREQUENCY
6
5
4
3
2
1
I
1
10
100
1k
10k
100k
0
Frequency (Hz)
OUTPUT CURRENT NOISE DENSITY vs FREQUENCY
6
5
4
3
2
1
O
1
10
100
1k
10k
100k
THEORY OF OPERATION
A simplified schematic of the XTR101 is shown in Figure 1.
Basically the amplifiers, A
1
and A
2
, act as a single power
supply instrumentation amplifier controlling a current source,
A
3
and Q
1
. Operation is determined by an internal feedback
loop. e
1
applied to pin 3 will also appear at pin 5 and
similarly e
2
will appear at pin 6. Therefore the current in R
S
,
the span setting resistor, will be I
S
= (e
2
– e
1
)/R
S
= e
IN
/R
S
.
This current combines with the current, I
3
, to form I
1
. The
circuit is configured such that I
2
is 19 times I
1
. From this
point the derivation of the transfer function is straightfor-
ward but lengthy. The result is shown in Figure 1.
Examination of the transfer function shows that I
O
has a
lower range-limit of 4mA when e
IN
= e
2
– e
1
= 0V. This 4mA
is composed of 2mA quiescent current exiting pin 7 plus
2mA from the current sources. The upper range limit of I
O
is
set to 20mA by the proper selection of R
S
based on the upper
range limit of e
IN
. Specifically R
S
is chosen for a 16mA
output current span for the given full scale input voltage
span; i.e., (0.016
+ 40/R
S
)(e
IN
full scale) = 16mA. Note that
since I
O
is unipolar e
2
must be kept larger than e
1
; i.e., e
2
≥
e
1
or e
IN
≥
0. Also note that in order not to exceed the output
upper range limit of 20mA, e
IN
must be kept less than 1V
when R
S
=
∞
and proportionately less as R
S
is reduced.
INSTALLATION AND
OPERATING INSTRUCTIONS
BASIC CONNECTION
The basic connection of the XTR101 is shown in Figure 1.
A difference voltage applied between input pins 3 and 4 will
cause a current of 4-20mA to circulate in the two-wire
output loop (through R
L
, V
PS
, and D
1
). For applications
requiring moderate accuracy, the XTR101 operates very
cost-effectively with just its internal drive transistor. For
more demanding applications (high accuracy in high gain)
an external NPN transistor can be added in parallel with the
internal one. This keeps the heat out of the XTR101 package
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XTR101BG | 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 |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XTR101AU | 制造商:Texas Instruments 功能描述:PRECISION TRANSMITTR SOIC14 101 |
| XTR101AU/1K | 功能描述:電流靈敏放大器 Prec Lo-Drift 4-20mA 2-Wire Trnsmtr 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 |
| XTR101AU/1KG4 | 功能描述:電流靈敏放大器 Prec Lo-Drift 4-20mA 2-Wire Trnsmtr 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 |
| XTR101AUG4 | 功能描述:電流靈敏放大器 Prec Lo-Drift 4-20mA 2-Wire Trnsmtr 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 |
| XTR101BG | 功能描述:電流靈敏放大器 Prec Lo-Drift 4-20mA 2-Wire Trnsmtr 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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