LTC2632AHTS8-LZ12

Overview

The LTC2632AHTS8-LZ12 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 with 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 is guaranteed monotonic over the automotive temperature range of –40°C to 125°C.

Feature Summary

• Dual 12-bit DACs with integrated 4.096V precision reference (10ppm/°C)
• Maximum INL error of ±1.5LSB for high accuracy
• Automotive temperature grade: –40°C to 125°C
• Power-on reset to zero-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 HTS8 against official documentation to confirm pinout and thermal characteristics. Ensure the supply voltage meets the minimum 4.5V requirement for the H-grade variant. Confirm that the zero-scale power-on reset behavior aligns with system initialization requirements. Check for RoHS compliance status as indicated in the datasheet.

Selection Notes

Select this component when dual channel 12-bit resolution is required within a compact TSOT-23 footprint. The H-grade designation necessitates a supply voltage between 4.5V and 5.5V. Choose the LZ suffix if the application requires outputs to default to zero volts upon power-up. Consider the external reference option if a different full-scale voltage is needed.

Part Context

This part belongs to the LTC2632 family, which includes variants with 10-bit and 8-bit resolutions, as well as L-grade parts with a 2.5V full-scale output. The 'A' indicates an electrical grade with improved linearity (±1.5LSB max INL). The 'H' denotes the automotive temperature range and higher supply voltage operation compared to the commercial 'C' or standard 'L' grades.

Replacement Considerations

Direct substitutes within the same package and specification include other LTC2632AHTS8 variants with different reset behaviors (e.g., LTC2632AHTS8-HI12 for mid-scale reset). Cross-model replacements like the LTC2641 offer similar interfaces but differ in package type and resolution options.