LT1029/LT1029A
5V Bandgap Reference
FEATURES
■ 0.2% Output Tolerance
■ 0.6Ω Shunt Impedance
■ 700µA to 10mA Operating Current
■ Pin Compatible with LM136-5
■ 20ppm/°C Max Drift
■ Output Voltage Trim does not Affect Drift
■ Can be Used as Positive or Negative Reference
U
APPLICATIO S
■ A-to-D and D-to-A Converters
■ Precision Regulators
■ Precision Current Sources
■ V to F and F to V Converters
TYPICAL APPLICATIO
15V
R1
10k
5V
LT1029
LT1029
R2
10k
–5V
–15V
LT1029 • TA01
DESCRIPTIO
The LT®1029 is a 5V bandgap reference intended for use
in the shunt or “Zener” mode, allowing it to be used as
either a positive or negative reference. The output is
pretrimmed to ± 0.2% accuracy with 20ppm/°C maximum
temperature drift. A trim pin allows additional output
adjustment for even more precise output voltage.
Operating current range for the LT1029 is 700µA to 10mA.
Extremely low dynamic impedance allows excellent
output regulation even with fluctuating operating current.
The LT1029 will replace an LM136-5 or LM336-5 and
simplify circuits using the “minimum temperature coeffi-
cient” trim network. The LT1029 does not require this
special network to meet its temperature drift specification;
these application network components are simply
removed. If output trimming is required for initial
accuracy, the diodes in the trim network should be
replaced with jumpers.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Output Voltage Drift
5.015
5.010
5.005
5.000
4.995
4.990
4.895
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
LT1029 • TA02
1029afa
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