LTC2632HTS8-HZ12

Overview

The LTC2632HTS8-HZ12 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 specifications include a maximum integral nonlinearity (INL) of ±2.5LSB, rail-to-rail output buffers, and guaranteed monotonicity. The part includes a power-on reset circuit configured to clear outputs to zero-scale upon initialization.

Feature Summary

• Dual 12-bit DACs with integrated 4.096V precision reference
• 10ppm/°C reference temperature coefficient for high accuracy
• Power-on reset to zero-scale for consistent system initialization
• 3-wire SPI/MICROWIRE interface with 50MHz clock capability

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 #TRMPBF or #TRPBF against current distributor availability, as tape and reel quantities vary. Confirm that the automotive temperature grade (-40°C to 125°C) matches the design requirements. Ensure the 4.5V minimum supply voltage constraint is compatible with the target system power rails before procurement.

Selection Notes

Select this component when a dual-channel DAC with an internal reference is required in a compact TSOT-23 package. The H-grade variant is necessary for applications requiring a 4.096V full-scale range, distinguishing it from the L-grade 2.5V variant. The Z-suffix ensures zero-scale power-up behavior, which is critical for protecting downstream circuits during startup sequences compared to mid-scale reset options.

Part Context

This part belongs to the LTC2632 family of dual DACs, which offers various combinations of resolution (8-, 10-, 12-bit), reset behaviors, and full-scale voltages. The HTS8 designation indicates the Automotive temperature grade (H), TSOT-23 package (TS8), and Zero-scale reset (Z). It shares the same pinout and interface protocol with commercial grade (C) and lower voltage (L) variants within the series.

Replacement Considerations

Direct pin-compatible substitutes within the same package and interface include other LTC2632 variants such as LTC2632ACTS8-HZ12 (Commercial grade) or LTC2632HTS8-LZ12 (Lower voltage range). Cross-family replacements require verification of pin compatibility and electrical parameter alignment.