LTC2632ACTS8-HI12

Overview

The LTC2632ACTS8-HI12 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 a temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 4.5V to 5.5V. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1.5LSB, a settling time of 4.9µs at 5V, and rail-to-rail output buffers. The part includes power-on reset circuitry configured to set outputs to mid-scale upon initialization.

Feature Summary

• Dual 12-bit DACs with integrated 4.096V reference (10ppm/°C drift)
• Maximum INL error of ±1.5LSB for high accuracy
• SPI/MICROWIRE compatible 3-wire serial interface with 50MHz clock rate
• Power-on reset to mid-scale in internal reference mode

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-unit tape and reel packaging configuration. Confirm that the H-grade designation ensures operation within the automotive temperature range of –40°C to 125°C. Ensure the system supply voltage remains between 4.5V and 5.5V to meet specified performance parameters.

Selection Notes

Select this component when a dual-channel 12-bit DAC with a fixed 4.096V full-scale range is required. The HI suffix specifies mid-scale power-on reset behavior, which is suitable for applications where downstream circuits must remain active during startup. Verify compatibility with 4.5V–5.5V supply rails, as lower voltages are not supported by the H-grade variant.

Part Context

This part belongs to the LTC2632 family, which offers various resolution and reference configurations. The ACTS8 designation identifies the Automotive grade (H), Commercial temperature range extension, TSOT-23 package, and A-grade linearity specification. Other variants in the series include L-grade parts with 2.5V references and different reset options such as zero-scale or external reference modes.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC2632ACTS8-LI12, which provides a 2.5V full-scale output but requires a 2.7V minimum supply voltage. For higher resolution needs, the LTC2641 series offers single-channel options in similar packages. Cross-model replacement requires verification of supply voltage constraints and reference voltage scaling.