Datasheet
XTR110
6
SBOS141C
www.ti.com
APPLICATIONS INFORMATION
Figure 1 shows the basic connections required for 0V to 10V
input and 4ma to 20mA output. Other input voltage and
output current ranges require changes in connections of pins
3, 4, 5, 9 and 10 as shown in the table of Figure 1.
The complete transfer function of the XTR110 is:
I
O
=(1)
R
SPAN
is the total impedance seen at the emitter of the
internal NPN transistor. This impedance varies depending
on how pins 8, 9 and 10 are configured. Typical operating
region configurations are shown in Figure 1. An external
R
SPAN
can be connected for different output current ranges
as described later.
EXTERNAL TRANSISTOR
An external pass transistor, Q
EXT
, is required as shown in
Figure 1. This transistor conducts the output signal current.
A P-channel MOSFET transistor is recommended. It must
(V
REF IN
)
16
(V
IN1
)
4
10 + +
(V
IN2
)
2
R
SPAN
FIGURE 1. Basic Circuit Connection.
INPUT OUTPUT
RANGE (V) RANGE (mA) PIN 3 PIN 4 PIN 5 PIN 9 PIN 10
0-10 0-20 Com Input Com Com Com
2-10 4-20 Com Input Com Com Com
0-10 4-20 +10V Ref Input Com Com Open
0-10 5-25 +10V Ref Input Com Com Com
0-5 0-20 Com Com Input Com Com
1-5 4-20 Com Com Input Com Com
0-5 4-20 +10V Ref Com Input Com Open
0-5 5-25 +10V Ref Com Input Com Com
MANUFACTURER PART NO. BV
DSS
(1)
BV
GS
(1)
PACKAGE
Ferranti ZVP1304A 40V 20V TO-92
ZVP1304B 40V 20V TO-39
ZVP1306A 60V 20V TO-92
ZVP1306B 60V 20V TO-39
International
Rectifier IRF9513 60V 20V TO-220
Motorola MTP8P08 80V 20V TO-220
RCA RFL1P08 80V 20V TO-39
RFT2P08 80V 20V TO-220
Siliconix VP0300B 30V 40V TO-39
(preferred) VP0300L 30V 40V TO-92
VP0300M 30V 40V TO-237
VP0808B 80V 40V TO-39
VP0808L 80V 40V TO-92
VP0808M 80V 40V TO-237
Supertex VP1304N2 40V 20V TO-220
VP1304N3 40V 20V TO-92
VP1306N2 60V 20V TO-220
VP1306N3 60V 20V TO-92
NOTE: (1) BV
DSS
—Drain-source breakdown voltage. BV
GS
—Gate-source
breakdown voltage.
TABLE I. Available P-Channel MOSFETs.
R
5
16.25kΩ
16
1
13
14
7
6
8
10
9
15
12
11
4
3
5
2
R
7
6250Ω
R
6
1562.5Ω
R
9
50Ω
R
4
10kΩ
R
3
20kΩ
R
2
R
1
R
8
500Ω
+10V
Reference
Zero
Adjust
1µF
+
+V
CC
13.5 to 40V
Span Adjust
4mA Span
R
L
(250Ω typ)
I
O
4 to 20mA
Q
EXT
P-Channel
MOSFET
(see text)
I
O
I
O
/10
I
O
/10
V
REF
Adj.
Force
Sense
V
IN
0 to 10V
Short
Connection
(see text)
+V
CC
16mA Span
5kΩ
15kΩ
have a voltage rating equal or greater than the maximum
power supply voltage. Various recommended types are shown
in Table I.