LTC2640HTS8-LZ10#TRPBF

Overview

The LTC2640HTS8-LZ10#TRPBF is a single-channel, 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It integrates a high-accuracy reference with a temperature coefficient of ±10ppm/°C and a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and features a rail-to-rail output buffer guaranteed monotonic over temperature. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Upon power-up, the output resets to zero-scale. The component is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated precision reference providing 2.5V full-scale output with ±10ppm/°C drift
• 10-bit resolution with guaranteed monotonic operation across the operating temperature range
• Power-on reset circuitry defaults the analog output to zero-scale
• Low power consumption of 180µA at 3V with power-down mode reducing current to 1.8µA maximum

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration. Confirm that the 'L' designation corresponds to the 2.5V internal reference variant and the 'Z' designation ensures the zero-scale power-on reset behavior. Ensure the H-grade temperature rating (-40°C to 125°C) meets the operational requirements for the intended environment.

Selection Notes

Select this model when a 10-bit resolution is sufficient for the application's accuracy needs. The 'L' suffix specifies a 2.5V full-scale output suitable for lower voltage logic interfaces, while the 'Z' suffix guarantees a safe zero-state initialization upon power-up. Consider the external reference mode capability if a different full-scale voltage is required by connecting a voltage source to the REF pin.

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 SPI interface architecture. Variations within the family differ primarily in resolution, power-on reset behavior (Mid-Scale vs. Zero), and internal reference full-scale voltage (2.5V vs. 4.096V).

Replacement Considerations

Direct functional substitutes within the same package include other LTC2640 variants such as the LTC2640-LM10 or LTC2640-LZ8. Note that changing the resolution suffix alters the bit depth, and changing the reset suffix modifies the initial output state.