LTC2631HTS8-LZ8#TRPBF

Overview

The LTC2631HTS8-LZ8#TRPBF is an 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc., housed in an 8-lead TSOT-23 package. It features a high-accuracy internal reference with a full-scale output of 4.096V, requiring a supply voltage between 4.5V and 5.5V. The device incorporates a rail-to-rail output buffer guaranteed monotonic over temperature and supports bidirectional reference input or output. It utilizes a 2-wire I²C-compatible serial interface operating at clock rates up to 400kHz. A power-on reset circuit ensures the output initializes to zero-scale upon power-up.

Feature Summary

• 8-Bit Resolution with ±0.5 LSB Maximum Integral Nonlinearity (INL)
• Internal Reference Outputting 4.096V Full-Scale Voltage
• I²C Interface Supporting Standard (100kHz) and Fast Mode (400kHz)
• Power-On Reset Configured for Zero-Scale Initialization

Applications

• Process Control and Industrial Automation
• Portable Equipment
• Automotive Systems
• Optical Networking

Procurement Notes

Verify the H-grade designation confirms the –40°C to 125°C automotive temperature range and the LZ suffix indicates zero-scale power-on reset behavior. Confirm the TRPBF suffix corresponds to the standard tape and reel packaging format. Ensure the 4.5V minimum supply requirement aligns with the system design constraints.

Selection Notes

Select this component when an 8-bit resolution is sufficient for the application's accuracy requirements. The H-grade variant is necessary for operations extending to 125°C. The internal 4.096V reference eliminates the need for external precision references, simplifying the bill of materials. Verify that the I²C address configuration via CA0/CA1 pins meets the system bus topology needs.

Part Context

This part belongs to the LTC2631 family of single-channel DACs available in 12-, 10-, and 8-bit resolutions. The family shares a common pinout and I²C interface but varies in linearity specifications and internal reference voltages (2.5V for L-grade, 4.096V for H-grade). The LTS8 package denotes the 8-lead ThinSOT form factor.

Replacement Considerations

Direct replacements within the same family include other LTC2631 variants with different resolutions or reset configurations. Cross-family alternatives require matching the I²C interface, supply voltage range, and package dimensions.