0.02鈩?/div>
Plug-In Replacement for Present References
Available at 2.5V, 4.5V, 5V, and 10V
100% Noise Tested
Temperature Output
Industrial Temperature Range in SO-8
The LT
廬
1019 is a third generation bandgap voltage refer-
ence utilizing thin film technology and a greatly improved
curvature correction technique. Wafer level trimming of
both reference and output voltage combines to produce
units with high yields to very low TC and tight initial
tolerance of output voltage.
The LT1019 can both sink and source up to 10mA and can
be used in either the series or shunt mode. This allows the
reference to be used for both positive and negative output
voltages without external components. Minimum input/
output voltage is less than 1V in the series mode, providing
improved tolerance of low line conditions.
The LT1019 is available in four voltages: 2.5V, 4.5V, 5V
and 10V. It is a direct replacement for most bandgap
references presently available including AD580, AD581,
REF-01, REF-02, MC1400, MC1404 and LM168.
APPLICATIO S
s
s
s
s
s
s
Negative Shunt References
A/D and D/A Converters
Precision Regulators
Constant Current Sources
V/F Converters
Bridge Excitation
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Ultralinear Strain Guage
15V
357鈩?
0.5W
IN
OUT
350鈩?/div>
BRIDGE
GND
R2
20k
R4
20k
ACTIVE
ELEMENT
5V
R3
2M
OUTPUT VOLTAGE (NORMALIZED) (V)
LT1019-5
+
A1
鈥?/div>
LT1637
A2
LT1001
GAIN = 100
鈥?/div>
R5
2M
R6**
2M
LT1019 鈥?TA01
鈥?V
357鈩?
0.5W
鈥?5V
*REDUCES REFERENCE AND AMPLIFIER
LOADING TO
鈮?.
**IF R6 = R3, BRIDGE IS NOT LOADED BY R2 AND R4.
鈥?/div>
A1 V
OS
AND DRIFT ARE NOT CRITICAL BECAUSE A2
ACTS AS A DIFFERENTIAL AMPLIFIER.
U
Output Voltage Drift
1.003
1.002
1.001
1.000
0.999
0.998
0.997
鈥?0 鈥?5
LT1019
CURVE
10ppm/擄C
FULL TEMP RANGE 鈥淏OX鈥?/div>
5ppm/擄C
0擄C TO 70擄C 鈥淏OX鈥?/div>
UNCOMPENSATED
鈥淪TANDARD鈥?BANDGAP
DRIFT CURVE
50
25
75
0
TEMPERATURE (藲C)
100
125
1019 TA02
+
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