LTC2633HTS8-LI8#TRPBF

Overview

The LTC2633HTS8-LI8#TRPBF is a dual-channel, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It integrates a precision internal reference with a temperature coefficient of 10ppm/°C and operates on a single supply ranging from 2.7V to 5.5V. The device features rail-to-rail output buffers and guarantees monotonicity across the –40°C to 125°C automotive temperature range. Communication is handled via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Upon power-up, the outputs reset to mid-scale in internal reference mode. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a typical supply current of 0.4mA at 3V, and a settling time of 3.4µs for 8-bit resolution.

Feature Summary

• Dual 8-bit DAC channels with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers guaranteed monotonic over –40°C to 125°C
• Power-on reset to mid-scale in internal reference mode
• Low power consumption: 0.4mA typical at 3V supply

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates a tape and reel packaging format containing 2,500 pieces. Confirm that the LI8 designation corresponds to the 8-bit resolution, L full-scale voltage code, and I power-on reset configuration as defined in the manufacturer's ordering guide. Ensure compatibility with the required operating temperature range and supply voltage constraints before procurement.

Selection Notes

Select this component when a compact dual-channel solution is required for automotive or industrial applications demanding high accuracy and low drift. The 8-bit resolution suits applications where cost and pin count are critical but monotonicity is mandatory. Verify that the 2.7V to 5.5V supply range aligns with the system design and that the I²C interface timing meets the controller's requirements. Consider the external reference option if a different full-scale voltage is needed.

Part Context

This part belongs to the LTC2633 family of dual I²C DACs, which also includes variants with 10-bit and 12-bit resolutions (LTC2633-10, LTC2633-12). The family shares a common 8-lead TSOT-23 package and core architecture, differing primarily in resolution, linearity specifications, and power-on reset behaviors. Related parts include the single-channel LTC2631 and quad-channel LTC2635.

Replacement Considerations

Direct replacements within the same family include LTC2633HTS8-LI10#TRPBF (10-bit) and LTC2633HTS8-LI12#TRPBF (12-bit), provided higher resolution is acceptable. For single-channel needs, the LTC2631 series offers similar performance in a comparable package. Ensure any substitute maintains the 8-lead TSOT-23 footprint and I²C compatibility.