LT1029ACH

Voltage Reference Overview

The LT1029ACH is a 5V bandgap reference from Analog Devices, designed for shunt or Zener mode operation. It provides pretrimmed accuracy with ±0.2% output tolerance and a maximum temperature drift of 20ppm/°C. The device operates within a current range of 700µA to 10mA and features extremely low dynamic impedance of 0.6Ω. It includes a trim pin for additional voltage adjustment without affecting drift characteristics. Packaged in the TO-92 plastic case (Z Package), it supports both positive and negative reference configurations.

Voltage Reference Feature Summary

• Pretrimmed to ±0.2% accuracy with 20ppm/°C maximum temperature drift
• Extremely low dynamic impedance allows excellent regulation under fluctuating currents
• Trim pin enables precise output adjustment without impacting temperature stability
• Pin-compatible with LM136-5, simplifying circuit replacements

Voltage Reference Applications

• A-to-D and D-to-A converters
• Precision regulators
• Precision current sources
• V to F and F to V converters

Voltage Reference Procurement Notes

Verify the specific suffix 'ACH' against official documentation to confirm package type and operating temperature range. Ensure compatibility with existing designs referencing LM136-5. Confirm availability status as distribution channels may vary. Check for any obsolete package notices regarding the Z Package variant.

Voltage Reference Selection Notes

Select this component when high initial accuracy and low drift are required in a shunt reference configuration. The wide trim range of +5% to -13% allows for fine-tuning, though series resistors may be needed to manage thermal coefficient mismatches during trimming. Suitable for applications needing replacement of standard Zener references without complex minimum temperature coefficient networks.

Voltage Reference Part Context

The LT1029 series is a family of 5V bandgap references intended for precision analog applications. The LT1029A variant offers tighter initial accuracy compared to the standard LT1029. The LT1029ACH specifically denotes the AC grade accuracy housed in the TO-92 plastic package, distinguishing it from the metal can H package variants.

Voltage Reference Replacement Considerations

LT1029AC

Voltage Reference FAQ

Does output voltage trimming affect the temperature drift specification?

No, the LT1029 is designed such that output voltage trimming does not affect its temperature drift specification.

What is the recommended shunt capacitance value?

Values between 300pF and 0.01 µF are not recommended due to longer settling times. A 1 µF solid tantalum capacitor is suggested for most bypassing situations.