LTC2632HTS8-HZ10

Overview

The LTC2632HTS8-HZ10 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) of ±2.5LSB, a settling time of 4.9µs at 5V, and a supply current of 0.5mA at 5V with the internal reference active.

Feature Summary

• Dual 12-bit DACs with integrated 4.096V precision reference (10ppm/°C drift)
• Automotive temperature grade (-40°C to +125°C) in compact 8-lead TSOT-23 package
• Power-on reset function clears outputs to zero-scale for consistent initialization
• Rail-to-rail output buffers with guaranteed monotonicity over the full temperature range

Applications

• Mobile communications systems requiring precise signal generation
• Process control and industrial automation instrumentation
• Automatic test equipment needing stable voltage references
• Portable battery-powered equipment with low power constraints
• Automotive electronic control units and sensor interfaces

Procurement Notes

Verify the specific ordering suffix #TRMPBF or #PBF against the required packaging format, as the datasheet indicates tape and reel options vary by quantity. Confirm that the automotive temperature grade (H) and zero-scale reset configuration (Z) match the system requirements. Ensure the supply voltage remains within the 4.5V to 5.5V range specified for the H-grade devices to maintain performance guarantees.

Selection Notes

Select this component when a dual-channel DAC with high accuracy and automotive reliability is required. The H-series designation mandates a minimum supply voltage of 4.5V, distinguishing it from the L-series which supports 2.7V. The Z-suffix ensures the outputs default to zero upon power-up, which is critical for safety-sensitive applications where undefined states must be avoided. Consider the external reference mode if a different full-scale voltage is needed.

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-HZ10 specifically combines the highest accuracy grade (A-series INL specs often apply to the base model, but HZ12 is listed with ±2.5LSB max INL in the selection guide), automotive temperature range, and zero-scale reset. It shares the same pinout and interface as other variants in the series, allowing for design flexibility across different voltage and temperature requirements.

Replacement Considerations

Direct replacements within the same family include LTC2632HTS8-HI10 or LTC2632HTS8-HI12 if mid-scale reset is acceptable. For lower resolution needs, LTC2632HTS8-HZ10 or LTC2632HTS8-HZ8 are compatible. Ensure any substitute maintains the 4.5V minimum supply requirement and the 10ppm/°C reference stability if precision is critical.