LTC2633AHTS8-LZ12

Overview

The LTC2633AHTS8-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 with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. 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. Power-on reset defaults to zero-scale.

Feature Summary

• Dual 12-bit resolution with ±1.5 LSB maximum INL error
• Integrated 2.5V full-scale reference with 10ppm/°C drift
• I²C interface with selectable standard/fast mode clock rates
• Power-on reset to zero-scale for consistent initialization

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type, temperature grade, and power-on reset configuration. Ensure compatibility with system voltage requirements, as this variant operates within the 2.7V to 5.5V range. Confirm lead-free status and RoHS compliance through official datasheets or authorized distributor declarations prior to procurement.

Selection Notes

Select this component when dual-channel precision DAC functionality is required in a compact 8-lead TSOT-23 footprint. The LTC2633A grade offers tighter linearity specifications compared to standard grades. Consider the internal 2.5V reference if external reference components are constrained by board space or cost. Verify that the I²C address configuration via the CA0 pin aligns with the system bus topology.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes variants with different resolutions (8-bit, 10-bit), full-scale voltages (4.096V), and power-on reset behaviors. The 'A' designation indicates enhanced linearity performance, while 'H' specifies the automotive temperature range. The 'LZ12' suffix denotes the 2.5V full-scale, zero-scale reset, and 12-bit resolution configuration.

Replacement Considerations

Direct replacements within the same family include LTC2633AHTS8-LI12 (mid-scale reset) or LTC2633AHTS8-HZ12 (4.096V full-scale). Cross-family substitutes like the LTC2635 offer quad channels but differ in package size and pinout. Ensure any replacement maintains the required I²C compatibility and reset state behavior for the specific application.