LTC2633ACTS8-LI12

Overview

The LTC2633ACTS8-LI12 is a dual-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It integrates high-accuracy internal references 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, guaranteed monotonicity over the –40°C to 125°C temperature range, and 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, a typical supply current of 0.4mA at 3V, and a power-on reset function that initializes outputs to mid-scale in internal reference mode.

Feature Summary

• Dual 12-bit DACs with integrated precision reference (2.5V full-scale) and 10ppm/°C drift
• Rail-to-rail output buffers with guaranteed monotonic operation from –40°C to 125°C
• 2-wire I²C interface compatible with standard (100kHz) and fast (400kHz) clock rates
• Power-on reset circuit configurable to zero-scale, mid-scale, or high-impedance states

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm package type, temperature grade, and power-on reset behavior. Ensure the selected variant matches the required full-scale voltage and I²C address configuration for the target system design.

Selection Notes

Select this component when dual-channel precision is required in an 8-lead TSOT-23 package. The 'A' grade ensures tighter linearity performance (±1.5 LSB INL) compared to standard grades. Confirm that the 2.7V to 5.5V supply range aligns with the system voltage rails and that the I²C bus speed requirements are met by the standard or fast mode options.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes variants with different resolutions (8-bit, 10-bit), external reference capabilities, and higher accuracy grades. The ACTS8-LI12 designation specifically denotes the Automotive temperature grade, ThinSOT-23 package, Internal reference mode, and 12-bit resolution.

Replacement Considerations

Direct replacements within the same family include LTC2633ACTS8-HI12 (4.096V reference) or LTC2633ACTS8-LZ12 (Zero-Scale reset). Cross-family alternatives may require verification of pin compatibility and software register mapping.