LTC2640ITS8-LZ8#TRPBF

Overview

The LTC2640ITS8-LZ8#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 ranging from 2.7V to 5.5V. The device incorporates a rail-to-rail output buffer guaranteed monotonic over temperature. Key electrical parameters include a typical supply current of 180µA at 3V, a settling time of 3.2µs for ±1LSB accuracy, and a maximum integral nonlinearity (INL) of ±0.5LSB. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz.

Feature Summary

• Integrated 10ppm/°C precision reference with 2.5V full-scale output
• Asynchronous DAC Clear pin (Pin 8) resets output to zero-scale
• Power-on reset circuit configured to initialize output to zero-scale
• Low power operation: 180µA typical supply current at 3V

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Optical networking devices

Procurement Notes

Verify the specific suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration as defined in the manufacturer's ordering guide. Confirm that the 'I' grade designation matches the required industrial operating temperature range of –40°C to 85°C for the target application environment.

Selection Notes

Select this part when an 8-bit resolution is sufficient for the application requirements. The 'L' suffix denotes the 2.5V internal reference variant, suitable for single-supply operations between 2.7V and 5.5V. Choose the 'Z' power-on reset option if system initialization requires the DAC output to start at zero volts rather than mid-scale.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The LTS8 package refers to the 8-lead ThinSOT-23 plastic package. The family shares common architectural features including the 3-wire serial interface and integrated reference options, differentiated by resolution, reset behavior, and full-scale voltage specifications.

Replacement Considerations

Direct functional replacements within the same family include LTC2640ITS8-LM8#TRPBF (mid-scale reset) or LTC2640ITS8-HZ8#TRPBF (4.096V full-scale). Ensure any substitute maintains the 8-bit resolution, TSOT-23 package footprint, and compatible serial interface timing specifications.