Datasheet

XTR108
2
SBOS187C
www.ti.com
Loop Supply Voltage, V
PS
............................ Dependent on External FET
XTR Supply Voltage, External V
S
(Referenced to I
RET
Pin) ............ +5.5V
Input Voltage to Multiplexer (Referenced to I
RET
Pin) ................ 0V to V
S
Output Current Limit ................................................................ Continuous
Storage Temperature Range .........................................–55°C to +125°C
Junction Temperature .................................................................... +165°C
Lead Temperature (soldering, 10s) ............................................... +300°C
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.
ABSOLUTE MAXIMUM RATINGS
(1)
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
SPECIFIED
PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT
PRODUCT PACKAGE-LEAD DESIGNATOR RANGE MARKING NUMBER MEDIA, QUANTITY
XTR108EA SSOP-24 DBQ –40°C to +85°C XTR108EA XTR108EA Rails
" """"XTR108EA/2K5 Tape and Reel, 2500
NOTE: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at
www.ti.com.
PACKAGE/ORDERING INFORMATION
(1)
ELECTRICAL CHARACTERISTICS
Boldface limits apply over the specified temperature range, T
A
= –40°C to +85°C.
At T
A
= +25°C, V
PS
= 24V, and Supertex DN2540 external depletion-mode FET transistor, unless otherwise noted, all voltages measured with respect to I
RET
pin.
XTR108EA
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
TO I
OUT
TRANSFER FUNCTION I
O
= V
IN
(Span) + 4mA
Output
Specified Range 420mA
Over-Scale Limit Resolution Digital Select: 21-28.5mA 0.5 mA
Fault Over-Scale Level
(1)
Above Over-Scale Selected +1.0 mA
Under-Scale Limit Resolution Digital Select: 2.2-3.6mA 0.2 mA
Fault Under-Scale Level
(1)
Below Under-Scale Selected –0.4 mA
Output for Zero Input
Zero Error, Unadjusted V
IN
= 0V ±50 µA
vs Temperature ±0.2 ±1.5 µA/°C
vs Loop-Supply Voltage, V
LOOP
V
LOOP
= 7.5V to 24V 0.02 µA/V
vs Common-Mode Voltage V
CM
= 0.2V to 3.5V ±1 µA/V
Adjustment Resolution, Zero Input 1.8 µA/Step
Adjustment Range, Zero Input ±4mA
Span
(2)
Span = I
O
/V
IN
Initial, Unadjusted ±1%
Drift (vs Temperature) 40 ppm/°C
Span Adjustment Resolution 0.05 %
Span Adjustment Range
PGA + Output Amplifier
(3)
R
VI
= 6.34kΩ 49.3 3150 mA/V
Nonlinearity, Ideal Input Full-Scale V
IN
= 50mV 0.01 %
PGA
Autozeroing Internal Frequency 6.5 kHz
PGA Offset Voltage (RTI)
(4)
V
CM
= 1V ±10 ±50 µV
vs Temperature ±0.02 µV/°C
vs Supply Voltage, V
S
V
S
= 4.5V to 5.5V ±0.5 µV/V
vs Common-Mode Voltage V
CM
= 0.2V to 3.5V 105 dB
Common-Mode Input Range 0.2 V
S
– 1.5 V
Input Bias Current 50 pA
vs Temperature
Doubles/10°C pA
Input Offset Current 10 pA
vs Temperature
Doubles/10°C pA