LTC2633HTS8-LZ12#TRPBF

Overview

The LTC2633HTS8-LZ12#TRPBF is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. 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 utilizes 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 in internal reference mode.

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 power-on reset to zero-scale
• Rail-to-rail output buffers operating from 2.7V to 5.5V

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF corresponds to the 2,500-piece tape and reel packaging format as defined in the manufacturer's order information. Confirm that the H-grade designation matches the required automotive temperature range of –40°C to 125°C for the intended application environment.

Selection Notes

Select this part when a dual-channel DAC with high accuracy (±1.5 LSB INL) and low power consumption is required. The LZ12 suffix indicates a zero-scale power-on reset, which is critical for applications where downstream circuits must remain inactive during initialization. Ensure the system supply voltage falls within the 2.7V to 5.5V range compatible with the L-series full-scale voltage.

Part Context

This component belongs to the LTC2633 family of dual DACs, which offers various combinations of resolution, accuracy grades, and power-on reset options. The HTS8 designation identifies the H-grade temperature variant housed in an 8-lead TSOT-23 package. Other family members include C-grade commercial variants and different reset configurations such as mid-scale or high-impedance states.

Replacement Considerations

Direct replacements within the same family include LTC2633HTS8-LI12#TRPBF for mid-scale reset or LTC2633HTS8-HZ12#TRPBF for 4.096V full-scale output. Verify pin compatibility and software register mapping when substituting between different reset codes or accuracy grades.

FAQ

What is the default output state upon power-up?

The LTC2633HTS8-LZ12#TRPBF resets both DAC outputs to zero-scale when power is first applied in internal reference mode.

What is the maximum integral nonlinearity error for this part?

The maximum INL error is specified as ±1.5 LSB for the 12-bit resolution version.

Can the device operate with an external reference?

Yes, the REF pin can accept an external reference voltage between 1V and VCC to set the full-scale output, overriding the internal 2.5V reference.