Loop
Voltage
Range (V)
Span Error
(unadj.)
(%) max
Output
Zero Error
(μA) ±m(xù)ax
CMRR
60Hz (dB)
min
Additional
Power
Available
Sensor
Linearization
Sensor
Excitation
Full Scale
Input Range
Packages
Price
(1kpcs)
Product
Description
Output Range
XTR101
XTR103
XTR104
XTR105
XTR106
XTR110
XTR112
XTR114
2-Wire Selectable In/Out Range
2-Wire, 100
RTD
2-Wire Bridge
2-Wire, 100
, V
REG
, Low Cost
2-Wire Bridge, V
REG
, Low Cost
3-Wire, Selectable In/Out Ranges
2-Wire, 1,000
RTD, V
REG
, Low Cost
2-Wire, 10k
RTD, V
REG
, Low Cost
—
2
x
1mA
2
x
800μA
5V
2
x
800μA
5V, Adj.
10V
2
x
250μA
2
x
100μA
11.6 to 40
9 to 40
9 to 40
7.5 to 36
7.5 to 36
13.5 to 40
7.5 to 36
7.5 to 36
5mV to 1V
5mV to 1V
5mV to 1V
5mV to 1V
5mV to 1V
0 to 10V
5mV to 1V
5mV to 1V
4-20mA
4-20mA
4-20mA
4-20mA
4-20mA
Resistor Set
4-20mA
4-20mA
5
1
1
30μ
6μ
50μ
25μ
25μ
16μ
25μ
25μ
90
80
80
86
86
—
86
86
—
—
—
DIP-14, SOL-16
DIP-16, SOL-16
DIP-16, SOL-16
DIP-14, SO-14
DIP-14, SO-14
DIP-16
DIP-14, SO-14
DIP-14, SO-14
$7.25
$7.16
$7.16
$3.75
$3.75
$6.35
$3.75
$3.75
0.2
0.2
0.2
0.2
0.2
5.1V at 1mA
5.1V at 1mA
—
5.1V at 1mA
5.1V at 1mA
—
RCV420
4-20mA Current Loop Receiver
(10V Ref)
± 18
4-20mA
0 to 5V
—
1.25mV
86
—
DIP-16
$3.34
2-Wire Transmitters
4-20mA Transmitters
4-20mA Receiver
Specifications listed in this table are intended as a guide to product selection. Some specifications are compiled or interpreted and conditions may vary. Refer to product data sheets for detailed specifications.
Recommended resale in USD; FOB USA
.
Sensor Linearization
Key to the accuracy of several of these 4-20mA transmitters is their ability to
linearize the output of many sensors. The platinum RTD, for example, has a
very predictable resistance vs temperature characteristic. Its uncompensated
response, however, has a substantial non linearity (several percent,
depending on the range) that peaks at the midpoint. Components noted
above include circuitry to dramatically improve the sensor nonlinearity and
reduce the total error 40 to 1 (see corrected response). The XTR103,
XTR105, XTR112 and XTR114 are optimized for signal conditioning and
linearization of RTD temperature sensors and some bridges.
Ratiometric sensors of many types (those whose output is proportional to an
excitation voltage or current) can be linearized with these techniques.
Voltage-excited bridge sensors (strain gages, for example) often have an
upward or downward bowing response (see right). The XTR104 and XTR106
can substantially improve the accuracy of these devices. They achieve up to
a 20:1 improvement in transfer function linearity.