LTC2633CTS8-LX12

Overview

The LTC2633CTS8-LX12 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 providing a full-scale output of 2.5V with a temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 2.7V to 5.5V 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 ±2.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the operating temperature range.

Feature Summary

• Dual-channel 12-bit resolution with integrated 2.5V precision reference
• I²C compatible serial interface with selectable power-on reset to mid-scale
• Rail-to-rail output buffers with ±2.5 LSB maximum INL error
• Low power consumption of 0.4mA at 3V supply voltage

Applications

• Mobile communications systems
• Process control and industrial automation
• Power supply margining applications
• Portable equipment requiring low power DACs
• Automotive electronic systems

Procurement Notes

Verify the specific ordering suffix 'LX12' against official Analog Devices documentation to confirm the power-on reset behavior corresponds to mid-scale initialization in external reference mode. Ensure the commercial temperature grade 'C' meets the operational requirements of the target environment, as this variant is rated for 0°C to 70°C. Confirm package availability in the TSOT-23 format through authorized distribution channels.

Selection Notes

Select the LTC2633CTS8-LX12 when a dual-channel DAC with an integrated 2.5V reference is required for space-constrained designs. This part is suitable for applications needing I²C connectivity and low power operation within the 2.7V to 5.5V supply range. Consider alternative grades if operation below 0°C or above 70°C is necessary, or if different power-on reset states such as zero-scale are preferred.

Part Context

This component belongs to the LTC2633 family of dual DACs, which offers various combinations of resolution, reference voltage, and power-on reset options. The 'L' designation indicates the 2.5V internal reference configuration, while 'X' specifies the mid-scale reset behavior in external reference mode. The 'CTS8' identifier confirms the commercial temperature grade and TSOT-23 packaging, distinguishing it from automotive or higher accuracy variants within the same product line.

Replacement Considerations

Direct replacements within the LTC2633 family include parts with identical pinouts and functionality but different reset behaviors or resolutions, such as LTC2633CTS8-LI12 or LTC2633CTS8-LZ12. Verify that any substitute maintains the 2.5V full-scale output and I²C compatibility. Cross-family replacements require careful evaluation of pinout compatibility and reference voltage requirements.