LTC2632CTS8-LX12

Overview

The LTC2632CTS8-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 a 2.5V full-scale output with an integrated 10ppm/°C reference and operates on a single 2.7V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity of ±2.5LSB, a settling time of 4.4µs at 3V, and a supply current of 0.4mA. The LX suffix designates a power-on reset to mid-scale in external reference mode.

Feature Summary

• Dual 12-bit DACs with rail-to-rail output buffers and guaranteed monotonicity
• Integrated 2.5V precision reference with 10ppm/°C temperature coefficient
• Power-on reset to mid-scale in external reference mode (LX suffix)
• 3-wire serial interface supporting SCK frequencies up to 50MHz

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics

Procurement Notes

Verify the specific ordering suffix 'LX' to confirm the power-on reset behavior is set to mid-scale in external reference mode. Ensure the application supply voltage remains within the 2.7V to 5.5V range required for the LTC2632-L series. Confirm that the commercial temperature grade (0°C to 70°C) meets the operational requirements of the target environment.

Selection Notes

Select this part when a dual-channel DAC with low power consumption and compact packaging is required. The LTC2632-LX12 is suitable for applications needing a defined mid-scale output upon power-up when using an external reference. For higher accuracy, consider the LTC2632A variant which offers ±1.5LSB maximum INL compared to the standard ±2.5LSB.

Part Context

This component belongs to the LTC2632 family of dual DACs available in 8-, 10-, and 12-bit resolutions. The 'CTS8' indicates the Commercial temperature grade and TSOT-23 package. The 'LX12' specifies the 2.5V full-scale range, external reference power-on reset mode, and 12-bit resolution. Other variants include 'LI' for internal reference reset and 'LZ' for zero-scale reset.

Replacement Considerations

Direct substitutes within the same family include LTC2632CTS8-LI12 (internal reference reset) and LTC2632CTS8-LZ12 (zero-scale reset). For improved linearity, the LTC2632ACTS8-LX12 offers ±1.5LSB INL. Higher resolution options like the LTC2641 are available but differ in pin count and package type.