LTC2633HTS8-LZ12

Overview

The LTC2633HTS8-LZ12 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 providing 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 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 12-bit resolution with ±1.5 LSB maximum INL error
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• I²C interface with selectable standard or fast mode clock rates
• Power-on reset to zero-scale for consistent 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 package type, temperature grade, and power-on reset behavior. Ensure the supply voltage meets the minimum requirement of 4.5V for the H-grade variant. Confirm lead-free status and RoHS compliance through official datasheets before procurement.

Selection Notes

Select this component when a dual-channel DAC with high accuracy and low temperature drift is required in a compact footprint. The H-grade designation indicates suitability for automotive environments (-40°C to 125°C). Ensure the system supply voltage supports the 4.5V to 5.5V operating range. Consider the LZ12 suffix if a zero-scale power-on reset state is necessary for downstream circuit protection.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes variants with 10-bit and 8-bit resolutions, different full-scale voltages (2.5V), and alternative power-on reset configurations. The 'H' denotes the automotive temperature grade, while 'LZ12' specifies the 4.096V reference and zero-scale reset behavior for the 12-bit version.

Replacement Considerations

Direct replacements within the same family include LTC2633HTS8-HI12 (mid-scale reset) or LTC2633HTS8-XZ12 (external reference mode). Verify that any substitute matches the 4.5V minimum supply requirement and the specific power-on reset state needed by the application.