LTC2640CTS8-HZ8#TRMPBF

Overview

The LTC2640CTS8-HZ8#TRMPBF is a single-channel, 8-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 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 parameters include a maximum integral nonlinearity (INL) of ±2.5 LSB, a typical settling time of 3.2µs at 3V, and a 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
• 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 #TRMPBF indicates a 500-piece tape and reel packaging quantity, distinct from the standard 2,500-piece TRM option. Confirm the C-grade commercial temperature range (0°C to 70°C) aligns with operational requirements. Ensure the 8-bit resolution and zero-scale power-on reset configuration match the target design specifications before procurement.

Selection Notes

Select this component when an 8-bit resolution is sufficient for the application, offering lower power consumption compared to higher-resolution variants. The HZ8 designation specifies the 2.5V internal reference and zero-scale reset behavior. For applications requiring mid-scale reset or external reference selection via hardware, consider the HM suffix variants instead. Verify that the 0°C to 70°C operating range meets environmental constraints.

Part Context

This part belongs to the LTC2640 family of single-channel SPI DACs available in 8-, 10-, and 12-bit resolutions. The family shares a common 8-lead TSOT-23 package and core architecture but varies in accuracy grades (L vs A), reset behaviors (Z vs M), and reference voltages (L vs H). The CTS8 suffix denotes the commercial grade and ThinSOT package type.

Replacement Considerations

Publicly confirmed substitutes within the same family include LTC2640CTS8-HM8#TRMPBF for mid-scale reset or LTC2640ITS8-HZ8#TRMPBF for industrial temperature range operation.