LTC2632HTS8-LX8

Overview

The LTC2632HTS8-LX8 is a dual 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features an integrated 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 interface supporting clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity (INL) error of ±2.5LSB, rail-to-rail output buffers, and guaranteed monotonicity. Upon power-up, the outputs reset to mid-scale in external reference mode.

Feature Summary

• Dual 8-bit DACs with integrated 10ppm/°C reference providing 2.5V full-scale output
• Power-on reset configured to set outputs to mid-scale in external reference mode
• Rail-to-rail output buffers with low noise performance (0.75mVP-P typical)
• 3-wire serial interface compatible with SPI and MICROWIRE protocols

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm availability and lead times. Ensure the selected temperature grade matches the operational environment requirements. Confirm that the 8-lead TSOT-23 package dimensions align with the target PCB footprint constraints.

Selection Notes

Select this component when a dual-channel, low-pin-count DAC is required for cost-sensitive applications. The LX suffix specifically designates mid-scale reset behavior in external reference mode, which differs from internal reference configurations. Verify that the 2.7V to 5.5V supply range accommodates the system's power architecture and that the 8-bit resolution meets the signal processing accuracy needs.

Part Context

This part belongs to the LTC2632 family, which offers various combinations of resolution (8, 10, or 12 bits), full-scale voltages (2.5V or 4.096V), and power-on reset behaviors. The HTS8 designation indicates the Automotive temperature grade (-40°C to 125°C) and the TSOT-23 package type. Other variants in the series include different reset options such as zero-scale or internal reference mid-scale.

Replacement Considerations

Direct substitutes within the same family include the LTC2632ACTS8-LX8 for commercial temperature grades or the LTC2632HMS8-LX8 for MSOP packages. Cross-family replacements require matching the 8-bit resolution, dual-channel configuration, and 3-wire serial interface compatibility.