LTC2633HTS8-LX12#TRPBF

Overview

The LTC2633HTS8-LX12#TRPBF 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 2.5V and operates on a single 2.7V to 5.5V supply. The device communicates via 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, a settling time of 4.0µs at 3V, and a supply current of 0.4mA at 3V. It includes a power-on reset circuit configured to set outputs to mid-scale in external reference mode.

Feature Summary

• Dual 12-bit resolution with rail-to-rail output buffers and guaranteed monotonicity over the –40°C to 125°C temperature range.
• Integrated precision reference providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C.
• Maximum INL error of ±1.5 LSB for the A-grade version, ensuring high accuracy.
• Power-on reset function sets DAC outputs to mid-scale when operating in external reference mode.

Applications

• Mobile communications systems
• Process control and industrial automation
• Power supply margining
• Portable equipment
• Automotive applications

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 LX12 designation matches the required power-on reset behavior (mid-scale in external reference mode) and the L suffix indicates the 2.5V internal reference full-scale voltage. Ensure the HTS8 package type aligns with the PCB footprint requirements.

Selection Notes

Select this component when a dual-channel, low-power DAC with an integrated reference is required for space-constrained designs. The LX12 variant is appropriate if the system design utilizes an external reference but requires the DAC outputs to initialize to mid-scale upon power-up. For applications needing zero-scale initialization or different full-scale voltages, other variants within the LTC2633 family should be considered.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes 10-bit and 8-bit resolutions. The 'A' grade denotes improved linearity performance compared to the standard grade. The 'H' temperature grade ensures operation across the extended automotive range of –40°C to 125°C, distinguishing it from the commercial C-grade parts.

Replacement Considerations

Direct replacements within the same family include LTC2633HTS8-LI12#TRPBF (internal reference reset) or LTC2633HTS8-LZ12#TRPBF (zero-scale reset). For higher resolution needs, the LTC2635 quad DAC family offers similar interfaces but in larger packages.