LTC2640CTS8-HZ12#TRMPBF

Overview

The LTC2640CTS8-HZ12#TRMPBF is a single-channel, 12-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 electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 4.1µs at 3V, and a typical supply current of 180µA at 3V. 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
• SPI/MICROWIRE compatible 3-wire serial interface supporting clock rates up to 50MHz
• Asynchronous DAC Clear pin (Pin 8) for immediate zero-scale reset
• Power-on reset to zero-scale with low glitch amplitude during startup

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging configuration. Confirm the 'C' grade designation aligns with the required commercial operating temperature range of 0°C to 70°C. Ensure the 'Z' suffix requirement for the asynchronous clear function matches the design intent, as this variant lacks the REF_SEL pin found in mid-scale reset versions.

Selection Notes

Select this part when a 2.5V internal reference and zero-scale power-up state are required. The C-grade temperature rating limits operation to 0°C to 70°C; choose the I or H grades if extended industrial or automotive temperatures are needed. Verify that the 2.7V minimum supply voltage is compatible with the system's power rails, as the H-grade variants require a minimum of 4.5V.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The family shares a common 8-lead TSOT-23 package and architecture but varies by resolution, power-on reset behavior, and reference voltage options. The LTS8 package type identifies it as a plastic ThinSOT-23 surface-mount device.

Replacement Considerations

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