LTC2633AHTS8-HI12#TRMPBF

Overview

The LTC2633AHTS8-HI12#TRMPBF 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. Power-on reset options allow initialization to mid-scale.

Feature Summary

• Dual 12-bit resolution with ±1.5 LSB maximum INL error
• Integrated 4.096V precision reference with 10ppm/°C drift
• Rail-to-rail output buffers with 4.5V to 5.5V supply range
• Power-on reset configured for mid-scale output in internal reference mode

Applications

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

Procurement Notes

Verify the #TRMPBF suffix indicates a 500-unit tape and reel packaging configuration, distinct from the standard 2,500-unit #TRPBF reel. Confirm the HI12 designation aligns with the required 4.096V full-scale voltage and mid-scale power-on reset behavior. Ensure the H-grade automotive temperature rating (-40°C to 125°C) meets system environmental requirements before procurement.

Selection Notes

Select this component when a dual-channel DAC with high accuracy (±1.5 LSB INL) and a fixed 4.096V internal reference is required. The H-grade variant is necessary for automotive or extended temperature applications. Verify that the 4.5V minimum supply voltage is compatible with the system power rails, as the L-grade variant supports lower voltages down to 2.7V but offers only a 2.5V full-scale output.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes variants with 10-bit and 8-bit resolutions. The 'A' suffix denotes the higher accuracy grade with ±1.5 LSB INL, compared to the standard ±2.5 LSB INL found in non-A parts. The 'H' indicates the automotive temperature grade, while 'I' specifies the mid-scale power-on reset option for internal reference operation.

Replacement Considerations

Direct replacements within the same package and pinout include other LTC2633AHI12 variants with different power-on reset codes (e.g., LTC2633AHTS8-HZ12 for zero-scale reset). For lower accuracy requirements, standard grade parts like LTC2633HTS8-HI12 may be substituted if the ±2.5 LSB INL specification is acceptable.