LTC2633HTS8-LZ8

Overview

The LTC2633HTS8-LZ8 is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single supply voltage ranging from 4.5V to 5.5V. The device communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the –40°C to 125°C temperature range. Upon power-up, the outputs reset to zero-scale.

Feature Summary

• Dual-channel 12-bit resolution with integrated 4.096V precision reference
• I²C interface with selectable standard (100kHz) and fast (400kHz) clock rates
• Rail-to-rail output buffers with ±1.5 LSB maximum INL error
• Power-on reset to zero-scale for consistent system initialization

Applications

• Mobile communications systems
• Process control and industrial automation
• Power supply margining
• Portable equipment
• Automotive applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm lead time and availability status. Ensure the component meets RoHS compliance requirements for the intended market. Confirm that the 8-lead TSOT-23 package dimensions align with the PCB footprint design constraints before finalizing procurement orders.

Selection Notes

Select this model when a dual-channel DAC with high accuracy (±1.5 LSB INL) and an integrated 4.096V reference is required. It is suitable for designs operating within a 4.5V to 5.5V supply range. Consider alternative resolutions (8-bit or 10-bit) if lower cost or different linearity specifications are acceptable. Verify that the I²C address configuration via the CA0 pin fits the system bus topology.

Part Context

This component belongs to the LTC2633 family of dual DACs, which also includes variants with 2.5V internal references (LTC2633-L) and commercial temperature grades (LTC2633C). The 'H' designation indicates the automotive temperature grade (–40°C to 125°C), while 'Z' specifies the power-on reset behavior to zero-scale. The 'A' grade denotes the enhanced linearity performance compared to standard versions.

Replacement Considerations

Direct replacements within the same family include LTC2633HTS8-HI12#TRPBF (mid-scale reset) or LTC2633HTS8-HX12#TRPBF (external reference mode). For quad-channel requirements, consider the LTC2635 series. Ensure any substitute maintains the 4.096V full-scale output and 12-bit resolution if performance parity is critical.