LTC2640CTS8-HZ8#TRPBF

Overview

The LTC2640CTS8-HZ8#TRPBF is a single-channel, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a full-scale output of 2.5V and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes a SPI/MICROWIRE compatible 3-wire serial interface with clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSBs, a settling time of 3.2µs at 3V, and a typical supply current of 180µA. It incorporates a power-on reset circuit that defaults the output to zero-scale.

Feature Summary

• Integrated 2.5V full-scale precision reference with 10ppm/°C temperature coefficient
• Asynchronous DAC Clear pin (Pin 8) for immediate zero-scale reset
• Power-on reset to zero-scale ensuring consistent system initialization
• Rail-to-rail output buffer guaranteed monotonic over temperature

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific ordering suffix #TRPBF corresponds to the 2,500-piece tape and reel packaging configuration as defined in the manufacturer's documentation. Confirm that the C-grade commercial temperature range (0°C to 70°C) aligns with the operational requirements of the target application environment.

Selection Notes

Select this component when an 8-bit resolution is sufficient for the application, offering lower power consumption compared to higher-resolution variants. Ensure the supply voltage remains within the 2.7V to 5.5V range required for the internal 2.5V reference mode. Verify that the asynchronous clear function meets the system's startup safety requirements.

Part Context

This part belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'H' designation indicates a 4.096V full-scale output, but the 'L' designation (implied by the 2.5V spec in the general description for non-H grades or standard L-series behavior) provides 2.5V. The datasheet specifies LTC2640-L for 2.7V-5.5V operation with 2.5V FS. The 'Z' suffix denotes the Zero-Scale power-on reset option.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material.