LTC2640CTS8-HZ10#TRPBF

Overview

The LTC2640CTS8-HZ10#TRPBF is a single-channel, 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with 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 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1 LSB, a settling time of 3.8µs 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 upon initialization.

Feature Summary

• Integrated 10ppm/°C precision reference providing a 2.5V full-scale output
• 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 systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics

Procurement Notes

Verify the specific suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration as defined in the datasheet ordering information. Confirm the C-grade designation corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure compatibility with the 8-lead TSOT-23 package dimensions for PCB layout requirements.

Selection Notes

Select this part when a 10-bit resolution with a 2.5V internal reference is required. The HZ suffix indicates the zero-scale power-on reset feature, which is critical if downstream circuits must remain inactive during startup. Compare against the LM variant if mid-scale reset is preferred. Verify that the 2.7V minimum supply voltage aligns with the system's power rails.

Part Context

This component belongs to the LTC2640 family of single-channel DACs, which also includes 8-bit and 12-bit variants. The family shares identical pinouts and serial interface protocols but differs in resolution, accuracy grades (A vs standard), and reset behaviors. The CTS8 designation specifies the commercial temperature grade and the ThinSOT-23 package type.

Replacement Considerations

Direct functional substitutes within the same package and specification profile include other members of the LTC2640 family, such as the LTC2640CTS8-LZ10#TRMPBF for 12-bit resolution or the LTC2640ITS8-HZ10#TRMPBF for industrial temperature range operation. Cross-model replacements like the LTC2631 series require interface adaptation due to I2C connectivity.