Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsVoltage RegulatorsLT1029ACZ#PBF

LT1029/LT1029A

1029afa

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0.2% Output Tolerance

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0.6Ω Shunt Impedance

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700µA to 10mA Operating Current

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Pin Compatible with LM136-5

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20ppm/°C Max Drift

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Output Voltage Trim does not Affect Drift

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Can be Used as Positive or Negative Reference

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.

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A-to-D and D-to-A Converters

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Precision Regulators

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Precision Current Sources

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V to F and F to V Converters

5V Bandgap Reference

FEATURES

APPLICATIO S

DESCRIPTIO

Output Voltage Drift

TYPICAL APPLICATIO

LT1029

10k

15V

–5V

–15V

10k

LT1029 • TA0

5.015

–50

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

5.010

5.005

5.000

4.995

4.990

4.895

–25 0 25 50 75 100 125

LT1029 • TA02

, LTC and LT are registered trademarks of Linear Technology Corporation.

Summary of content (4 pages)

PAGE 1
LT1029/LT1029A 5V Bandgap Reference U FEATURES ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO 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 ■ ■ ■ ■ 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.
PAGE 2
LT1029/LT1029A W W W AXI U U ABSOLUTE RATI GS (Note 1) Reverse Current .................................................... 15mA Forward Current ................................................... 10mA Operating Temperature Range LT1029C/LT1029AC ............................... 0°C to 70°C LT1029M/LT1029AM (OBSOLETE) ....– 55°C to 125°C Storage Temperature ............................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)..................
PAGE 3
LT1029/LT1029A U W TYPICAL PERFOR A CE CHARACTERISTICS Reverse Characteristics 1.0 0.9 0.8 CURRENT (mA) 0.7 0.6 0.5 TJ = 25°C 0.4 0.3 TJ = 125°C 0.2 TJ = – 55°C 0.1 0 7 6 4 1 3 2 5 OUTPUT TO GROUND VOLTAGE (V) 0 8 LT1029 • TPC01 U W U U APPLICATIO S I FOR ATIO Output Trimming Output voltage trimming on the LT1029 is nominally accomplished with a potentiometer connected from output to ground with the wiper tied to the trim pin.
PAGE 4
LT1029/LT1029A U W U U APPLICATIO S I FOR ATIO Split ± 2.5V References 2.5V R1 25k 0.1% LT1029 5V – LT1001 R2 25k 0.1% + – 5V – 2.5V R3 1k 5% – 5V LT1029 • AI04 U PACKAGE DESCRIPTIO H Package 2-Lead and 3-Lead TO-46 Metal Can (Reference LTC DWG # 05-08-1340) .209 – .219 (5.309 – 5.537) .178 – .195 (4.521 – 4.953) REFERENCE PLANE .050 (1.270) TYP .085 – .105 (2.159 – 2.667) .100 (2.540) TYP .050 (1.270) TYP PIN 1 .500 (12.700) MIN FOR 3-LEAD PACKAGE ONLY .025 (0.635) MAX .016 – .