LTC1448IS8#TRPBF

Digital To Analog Converters Overview

The LTC1448IS8#TRPBF is a dual 12-bit rail-to-rail voltage output digital-to-analog converter (DAC) in an 8-lead plastic SO package. It features buffered true rail-to-rail outputs and a 3-wire serial interface. The device operates on a single supply of 2.7V to 5.5V, dissipating 2.5mW at 5V. Outputs swing from 0V to the external reference voltage (REF), which can be tied to VCC. Key electrical parameters include a maximum differential nonlinearity (DNL) error of ±0.5 LSB, a settling time of 14µs to ±0.5 LSB, and a supply current of 450µA typical.

Digital To Analog Converters Feature Summary

• Dual 12-bit resolution with buffered rail-to-rail voltage outputs
• 3-wire serial interface with Schmitt trigger on clock input for direct optocoupler connection
• Power-on reset clears DAC outputs to 0V
• External REF pin allows operation with supplies from 2.7V to 5.5V

Digital To Analog Converters Applications

• Digital calibration systems
• Industrial process control
• Automatic test equipment
• Cellular telephones

Digital To Analog Converters Procurement Notes

Verify the IS8 suffix indicates industrial temperature range (-40°C to 85°C) and S8 denotes the 8-lead SOIC package. Confirm #TRPBF specifies tape and reel packaging. Ensure the REF pin is properly decoupled and that the supply voltage remains within the 2.7V to 5.5V specification for guaranteed performance.

Digital To Analog Converters Selection Notes

Select this component when a dual-channel 12-bit DAC with rail-to-rail output capability is required in a small footprint. It is suitable for battery-powered applications due to low power consumption. Choose if an external reference is preferred over an internal one, or if the REF pin needs to be tied directly to VCC for full-scale rail-to-rail operation.

Digital To Analog Converters Part Context

The LTC1448 is part of Analog Devices' micropower DAC family. It provides the smallest footprint among dual 12-bit DACs. Related parts include the LTC1446, which integrates an internal reference, and the LTC1450 series, which offers parallel interface options. The IS8 variant specifically covers the industrial temperature range compared to the C8 commercial grade.

Digital To Analog Converters Replacement Considerations

The LTC1446LIN8 is a related dual 12-bit DAC but includes an internal reference and is listed as obsolete. For direct replacement, verify compatibility with the external reference configuration. Other single-channel alternatives like the LTC1451 or LTC1453 may require circuit redesign due to channel count differences.