Wire Transmitter. LH0045 Datasheet

LH0045 Transmitter. Datasheet pdf. Equivalent


Part LH0045
Description Two Wire Transmitter
Feature LH0045 LH0045C Two Wire Transmitter July 1989 LH0045 LH0045C Two Wire Transmitter General Descrip.
Manufacture National Semiconductor
Datasheet
Download LH0045 Datasheet


LH0045 LH0045C Two Wire Transmitter July 1989 LH0045 LH004 LH0045 Datasheet
LH0045 LH0045C Two Wire Transmitter July 1989 LH0045 LH004 LH0045C Datasheet
Recommendation Recommendation Datasheet LH0045 Datasheet




LH0045
July 1989
LH0045 LH0045C Two Wire Transmitter
General Description
The LH0045 LH0045C Two Wire Transmitters are linear in-
tegrated circuits designed to convert the voltage from a sen-
sor to a current and send it through to a receiver utilizing
the same simple twisted pair as the supply voltage
The LH0045 and LH0045C contain an internal reference
designed to power the sensor bridge a sensitive input am-
plifier and an output current source The output current
scale can be adjusted to match the industry standards of
4 0 mA to 20 mA or 10 mA to 50 mA
Designed for use with various sensors the LH0045
LH0045C will interface with thermocouples strain gauges
or thermistors The use of the power supply leads as the
signal output eliminates two or three extra wires in remote
signal applications Also current output minimizes suscepti-
bility to voltage noise spikes and eliminates line drop prob-
lems
The LH0045 LH0045C is intended to fulfill a wide variety of
process control instrumentation and data acquisition appli-
cations The LH0045 is guaranteed over the temperature
range of b55 C to a125 C whereas the LH0045C is guar-
anteed from b25 C to a85 C
Features
Y High sensitivity
Y Low input offset voltage
Y Low input bias current
Y Single supply operation
Y Programmable bridge reference
(LH0045G)
Y Non-interactive span and null adjust
Y Over compensation capability
Y Supply reversal protection
l 10 mA mV
1 0 mV
2 0 nA
10V to 50V
5 0V to 30V
Equivalent Schematic
Note Pins shown are for the
12 pin to 8 (‘‘G’’) package
C1995 National Semiconductor Corporation TL K 5556
TL K 5556 – 1
RRD-B30M115 Printed in U S A



LH0045
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
(Note 2)
Supply Voltage (L1 to common)
a50V
Input Current
a20 mA
Input Voltage (Either Input to Common)
Differential Input Voltage
0V to VREF
g20V
Output Current (Either L1 or L2)
50 mA
Reference Output Current
5 0 mA
Power Dissipation
LH0045G
Operating Temperature Range
LH0045
LH0045C
Storage Temperature Range
Lead Temperature (Soldering 10 sec )
ESD rating to be determined
1 5W
b55 C to a125 C
b25 C to a85 C
b65 C to a150 C
a260 C
Electrical Characteristics (Note 1)
Parameter
Conditions
Input Offset Voltage (VOS)
Offset Voltage Temperature
Coefficient (DVOS DT)
Input Bias Current (IB)
IS e 4 0 mA TA e 25 C
IS e 4 0 mA
IS e 4 0 mA
TA e 25 C
Input Offset Current (IOS)
TA e 25 C
Open Loop
Transconductance (gMOL)
Supply Voltage Range (VS)
Input Voltage Range (VIN)
Open Loop Output
Impedance (ROUT)
Common Mode Rejection
Ratio (CMRR)
Power Supply Rejection
Ratio (PSRR)
Open Loop Supply
Current (ISOL)
Reference Voltage Load
Regulation (DVREF DIREF)
Reference Voltage Line
Regulation (DVREF DVS)
Reference Voltage Temperature
Coefficient (DVREF DT)
Reference Voltage (VREF)
DIS e 4 0 mA to 20 mA
DIS e 10 mA to 50 mA
LH0045G Pins 5 and 6 Open
LH0045G Pins 5 and 6 Open
VSe10V to 45V ISe4 0 mA
TA e 25 C
DVIN e 1 0V to 3 3V
IS e 12 mA
DVS e 10V to 45V
IS e 12 mA
VS e 50V
DIREF e 0 mA to 2 0 mA
TA e 25 C
DVS e 10V to 45V
TA e 25 C
IREF e 2 0 mA
IREF e 2 0 mA TA e 25 C
IREF e 2 0 mA TA e 25 C
LH0045G Pins 5 and 6 Open
LH0045
Min Typ
07
Limits
LH0045C
Max Min
Typ
20 20
30
Max
75
10
Units
mV
mV
3 0 6 0 mV C
08 20
30
15 70
10
0 05 0 2
04
02 10
15
106 107
2c106 2c107
106 107
2c106 2c107
9 0 50 9 0 50
15 50 15 50
10 33 10 33
10 76 10 76
nA
nA
nA
nA
mX
mX
V
V
V
V
1 0 1 0 MX
0 1 0 05
0 1 0 05
mV V
0 1 0 01
0 1 0 01
mV V
20 30
2 0 3 0 mA
0 05 0 2
0 05 0 2
%
03 05
0 3 0 7 mV V
0 004
0 004
%C
43
51 59 43
51 59
V
86
10 3 12
86
10 3 12
V
2







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