LTC2631CTS8-HM8#TRPBF

Overview

The LTC2631CTS8-HM8#TRPBF is a single-channel, 8-bit voltage-output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes a 2-wire I²C-compatible serial interface supporting clock rates up to 400kHz. Key specifications include a typical settling time of 4.6µs at ±1LSB for 12-bit resolution equivalents, low power consumption of 200µA at 5V, and a maximum integral nonlinearity error of ±2.5LSB. The part is housed in an 8-lead TSOT-23 package and includes a power-on reset circuit configured to initialize the output to mid-scale.

Feature Summary

• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• I²C interface with selectable addresses via CA0/CA1 pins or fixed logic states
• Power-on reset to mid-scale output for consistent system initialization
• Rail-to-rail buffered output with guaranteed monotonicity over temperature

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a standard tape and reel packaging configuration containing 2,500 units. Confirm that the H-grade designation matches the required automotive temperature range of –40°C to 125°C for the target application environment. Ensure the supply voltage infrastructure supports the minimum 4.5V requirement for the H-series variant.

Selection Notes

Select this component when a 4.096V full-scale output is required with an internal reference. The HM suffix specifies a mid-scale power-on reset state, which differs from the LZ suffix that resets to zero-scale. For applications requiring lower supply voltages starting at 2.7V, the L-grade variant must be selected instead. Verify that the 8-bit resolution meets the system accuracy requirements, as higher precision options are available in the same family.

Part Context

This part belongs to the LTC2631 family of single-channel DACs, which also includes 10-bit and 12-bit resolutions. The H-grade designation distinguishes it from the C-grade (commercial, 0°C to 70°C) and I-grade (industrial, –40°C to 85°C) variants. The TSOT-23 package provides a compact footprint suitable for space-constrained designs compared to larger SOIC packages.

Replacement Considerations

Direct pin-for-pin replacements within the same package include other LTC2631 variants such as the LTC2631CTS8-HZ8#TRPBF (zero-scale reset) or LTC2631ITS8-HM8#TRPBF (industrial temperature grade). Cross-family replacements like the LTC2632 (dual channel) require software adaptation but share the same interface.