LT1029CH

Voltage Reference Overview

The LT1029CH is a 5V bandgap reference from Analog Devices, housed in a TO-92 plastic package. It operates within a current range of 700µA to 10mA and provides an output voltage tolerance of ±1%. The device features a maximum temperature drift of 34ppm/°C and a reverse dynamic impedance of 1.0Ω at 1mA. It includes a trim pin allowing for a voltage adjustment range of +5% to -13%. Designed for shunt or Zener mode applications, it serves as a direct replacement for the LM136-5 without requiring additional minimum temperature coefficient trim networks.

Voltage Reference Feature Summary

• Pin-compatible with LM136-5 references
• Output voltage trimming capability that does not affect temperature drift
• Extremely low dynamic impedance for excellent regulation under fluctuating currents
• Operational stability across a wide operating current range

Voltage Reference Applications

• A-to-D and D-to-A converters
• Precision regulators
• Precision current sources
• Voltage-to-frequency and frequency-to-voltage converters

Voltage Reference Procurement Notes

Verify the specific suffix CH corresponds to the commercial temperature range (0°C to 70°C) and TO-92 package configuration. Confirm that the ordering information matches the manufacturer's current production status, as some variants may be obsolete. Ensure compatibility with existing circuit designs replacing LM136-5 components by validating the shunt impedance and operating current requirements against the system specifications.

Voltage Reference Selection Notes

Select this component when a 5V precision reference is required in a compact TO-92 form factor. It is suitable for applications needing a direct drop-in replacement for LM136-5 circuits while eliminating the need for complex external trim networks. Consider the 34ppm/°C drift specification for thermal environments and ensure the operating current remains between 700µA and 10mA for optimal performance.

Voltage Reference Part Context

The LT1029 series consists of 5V bandgap references designed for high-precision analog applications. The LT1029CH variant specifically utilizes the TO-92 plastic package, offering a cost-effective solution for space-constrained designs. This part belongs to a family known for simplifying circuit design by removing the requirement for specialized minimum temperature coefficient trim networks typically needed in older reference technologies.

Voltage Reference Replacement Considerations

LT1029ACH

Voltage Reference FAQ

Does output voltage trimming affect the temperature drift of the LT1029CH?

No, the output voltage trimming on the LT1029CH does not affect its temperature drift specification.

What is the recommended shunt capacitance value for the LT1029CH?

While stable with all values, a 1 µF solid tantalum capacitor is suggested for most situations where bypassing is desirable. Values between 300pF and 0.01 µF are not recommended due to longer settling times following transients.