LTC2631AHTS8-HZ12#TRPBF

Overview

The LTC2631AHTS8-HZ12#TRPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and operates within a supply voltage range of 4.5V to 5.5V. The device incorporates a rail-to-rail output buffer guaranteed monotonic over temperature and utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key specifications include a maximum Integral Nonlinearity (INL) error of ±1 LSB, a typical settling time of 4.6µs at ±1LSB, and a power-on reset function that defaults the output to zero-scale upon power-up.

Feature Summary

• 12-Bit Resolution with ±1 LSB Maximum INL
• Integrated 4.096V Reference with 10ppm/°C Drift
• I²C Interface with Bidirectional Reference Capability
• Power-On Reset to Zero-Scale Output

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF corresponds to the 2,500-piece tape and reel packaging format as defined in the manufacturer's documentation. Confirm that the H-grade designation aligns with the required automotive temperature range of –40°C to 125°C for the intended application environment.

Selection Notes

Select this component when a 4.096V full-scale output is required with a minimum supply voltage of 4.5V. Ensure the system design accommodates the H-grade temperature specification (-40°C to 125°C). Verify that the I²C address configuration via CA0 and CA1 pins meets the bus addressing requirements, as this model supports nine selectable addresses.

Part Context

This part belongs to the LTC2631 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'H' suffix indicates the automotive temperature grade, while 'Z' specifies the power-on reset behavior to zero-scale. The 'A' denotes the electrical grade with tighter linearity specifications compared to standard grades.

Replacement Considerations

Direct replacements within the same package and pinout include other LTC2631 variants such as the LTC2631AHM12 or LTC2631HZ12, provided the power-on reset behavior and full-scale voltage requirements match the design constraints.

FAQ

What is the default output state after power-up?

The LTC2631AHTS8-HZ12#TRPBF is configured with the 'Z' suffix, which ensures the DAC output resets to zero-scale upon power-up.

Can the internal reference be used as an external input?

Yes, the REF pin is bidirectional. While it outputs the internal 2.048V reference, it can also accept an external reference voltage to set the full-scale output.

What is the maximum operating supply voltage?

For the H-grade variant (LTC2631-H), the specified operating supply voltage range is 4.5V to 5.5V.