LT1019ACH-5

Voltage Reference Overview

The LT1019ACH-5 is a precision voltage reference from Analog Devices, utilizing third-generation bandgap technology with thin film construction and curvature correction. It provides a fixed 5V output with an initial tolerance of 0.05% and a typical temperature coefficient of 3ppm/°C. The device operates in series or shunt modes, sourcing or sinking up to 10mA. It features ultrahigh line rejection (approx. 0.5ppm/V) and low output impedance (approx. 0.02Ω). Designed for the industrial temperature range of 0°C to 70°C, it is housed in an 8-lead SOIC package.

Voltage Reference Feature Summary

• Third-generation bandgap architecture with thin film technology and curvature correction
• Capable of both sourcing and sinking up to 10mA for flexible circuit integration
• Ultralow drift characteristics with tight initial output voltage tolerance
• Integrated temperature output pin providing proportional-to-absolute-temperature signal

Voltage Reference Applications

• A/D and D/A converters
• Precision regulators
• Constant current sources
• Bridge excitation circuits

Voltage Reference Procurement Notes

Verify the specific suffix 'ACH' corresponds to the required industrial temperature range and accuracy class. Confirm the package type matches the PCB footprint requirements. Ensure input voltage conditions remain within specified limits to maintain regulation performance. Check for any recent product change notifications regarding marking or material composition.

Voltage Reference Selection Notes

Select this component when high stability and low drift are critical for analog signal processing. The 5V output suits standard logic levels and sensor interfaces. Consider the thermal regulation specifications if significant power dissipation changes occur during operation. Verify that the load current requirements do not exceed the 10mA sourcing or sinking capability.

Voltage Reference Part Context

The LT1019 series serves as a direct replacement for legacy references such as the AD580, REF-01, and LM168. It offers improved performance over previous bandgap designs through wafer-level trimming. The ACH variant specifically targets industrial applications requiring reliable performance across a defined temperature range without military-grade extremes.

Voltage Reference Replacement Considerations

LT1019CN8-5#PBF

Voltage Reference FAQ

Can the LT1019ACH-5 operate in negative voltage configurations?

Yes, the device can be used in either series or shunt mode to operate with positive or negative output voltages without external components.

What is the function of the TEMP pin?

The TEMP pin provides a voltage directly proportional to absolute temperature (PTAT) with a slope of approximately 2.1mV/°C, suitable for measuring relative temperature changes.