LTC2633AHTS8-HZ12#TRPBF

Overview

The LTC2633AHTS8-HZ12#TRPBF is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the –40°C to 125°C temperature range. The part incorporates a power-on reset circuit that defaults outputs to zero-scale in internal reference mode.

Feature Summary

• Dual 12-bit resolution with ±1.5 LSB maximum INL error
• Integrated 4.096V precision reference with 10ppm/°C drift
• Power-on reset to zero-scale in internal reference mode
• Rail-to-rail output buffers with 400kHz I²C support

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Power Supply Margining
• Portable Equipment
• Automotive Systems

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 order information. Confirm that the H-grade designation matches the required automotive temperature range of –40°C to 125°C for the target application environment.

Selection Notes

Select this component when a dual-channel DAC requires high accuracy (±1.5 LSB INL) and a fixed 4.096V full-scale output. Ensure the system supply voltage remains within the 4.5V to 5.5V range specified for the H-grade variant. Consider the zero-scale power-on reset behavior if downstream circuits are sensitive to initial output states.

Part Context

This part belongs to the LTC2633 family of dual DACs available in 8-, 10-, and 12-bit resolutions. The 'A' grade denotes improved linearity performance compared to standard grades. The 'H' suffix indicates the automotive temperature grade and 4.096V reference configuration, while 'TS8' specifies the 8-lead TSOT-23 package type.

Replacement Considerations

Direct replacements within the same family include LTC2633AHTS8-HI12#TRPBF (mid-scale reset) or LTC2633AHTS8-LZ12#TRPBF (2.5V full-scale). Verify pin compatibility and software register mapping when substituting variants with different power-on reset codes or reference voltages.

FAQ

What is the default output state upon power-up?

The LTC2633AHTS8-HZ12#TRPBF resets both DAC outputs to zero-scale when power is first applied, provided the internal reference mode is selected.

What is the operating supply voltage range for this specific part?

Due to the 'H' designation indicating a 4.096V full-scale internal reference, the valid supply voltage range is 4.5V to 5.5V.

How does the CA0 pin affect device operation?

The CA0 pin serves as Chip Address Bit 0 for the I²C interface. Tying it to VCC, GND, or leaving it floating selects one of three possible slave addresses for the device.