LTC2633CTS8-LI12

Overview

The LTC2633CTS8-LI12 is a dual-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It integrates high-accuracy, low-drift references and operates on a single 2.7V to 5.5V supply with a full-scale output of 2.5V. The device features rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C temperature range, and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes a power-on reset circuit configured to initialize outputs to mid-scale in internal reference mode.

Feature Summary

• Dual 12-bit DACs with integrated precision reference providing 2.5V full-scale output
• Maximum Integral Nonlinearity (INL) error of ±1.5 LSB for enhanced accuracy
• Low noise performance: 0.75mVP-P (0.1Hz to 200kHz)
• Guaranteed monotonic operation across the –40°C to 125°C temperature range

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type, temperature grade, and power-on reset behavior. Confirm that the 'CTS8' designation corresponds to the 8-lead TSOT-23 package and commercial temperature range as specified in the manufacturer's selection guide.

Selection Notes

Select this component when dual-channel 12-bit resolution with tight linearity specifications is required. The ±1.5 LSB INL makes it suitable for higher precision tasks compared to standard grades. Ensure the system supply voltage falls within the 2.7V to 5.5V range and that the I²C bus timing meets the standard or fast mode requirements.

Part Context

This part belongs to the LTC2633 family of dual DACs, which offers various combinations of resolution, accuracy grades, and power-on reset options. The 'A' suffix denotes the higher accuracy grade with ±1.5 LSB maximum INL, while the 'L' indicates the 2.5V full-scale internal reference configuration.

Replacement Considerations

Direct replacements include other parts from the LTC2633 family such as the LTC2633CTS8-LZ12 (zero-scale reset) or LTC2633CTS8-HI12 (4.096V full-scale). Verify pin compatibility and software register mapping before substitution.

FAQ

What is the maximum Integral Nonlinearity (INL) error for this part?

The LTC2633A series, indicated by the 'A' in the part number, has a maximum INL error of ±1.5 LSB.

How does the power-on reset function configure the outputs?

The 'I' suffix indicates that upon power-up, the DAC outputs are reset to mid-scale in internal reference mode.

What is the operating supply voltage range?

The device operates from a single supply voltage ranging from 2.7V to 5.5V.