LTC2633HTS8-HI12

Overview

The LTC2633HTS8-HI12 is a dual-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It integrates a high-accuracy reference with a temperature coefficient of 10ppm/°C and operates within a supply voltage range of 4.5V to 5.5V. The device features rail-to-rail output buffers and guarantees monotonicity across the –40°C to 125°C automotive temperature range. Key electrical parameters include a maximum integral nonlinearity (INL) error of ±1.5 LSB, a settling time of 4.7µs at 5V, and a typical supply current of 0.5mA. Communication is handled via a standard or fast-mode I²C interface.

Feature Summary

• Dual 12-bit DAC channels with integrated 4.096V full-scale internal reference
• Automotive grade operation from –40°C to +125°C in an 8-lead TSOT-23 package
• Rail-to-rail output buffers with guaranteed monotonicity over the full temperature range
• Power-on reset configured to mid-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm pinout compatibility and power-on reset behavior. Ensure the supply voltage meets the minimum requirement of 4.5V for the H-grade variant. Confirm that the I²C bus pull-up resistors are correctly sized for the desired clock frequency.

Selection Notes

Select this component when a dual-channel solution with high precision and automotive reliability is required. The HI12 designation specifies the 4.096V full-scale output and mid-scale power-on reset. For applications requiring lower supply voltages, consider the L-grade variants which operate down to 2.7V but provide a 2.5V full-scale output.

Part Context

This part belongs to the LTC2633 family of dual I²C DACs. The 'H' indicates the 4.096V full-scale voltage option, while 'I' denotes the mid-scale power-on reset configuration in internal reference mode. The 'A' suffix signifies the higher accuracy grade with ±1.5 LSB maximum INL error compared to the standard ±2.5 LSB grade.

Replacement Considerations

Direct replacements within the same family include LTC2633HTS8-LI12 for 2.5V operation or LTC2633HTS8-HZ12 for zero-scale power-on reset. Cross-family alternatives such as the LTC2635 offer quad channels in larger packages.