LTC2633CTS8-LZ10

Overview

The LTC2633CTS8-LZ10 is a dual 10-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 providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C. The device operates on a single 2.7V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the commercial temperature range of 0°C to 70°C. Communication is handled via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Upon power-up, the outputs reset to zero-scale.

Feature Summary

• Dual 10-bit DACs with integrated 2.5V precision reference (10ppm/°C drift)
• Rail-to-rail output buffers with guaranteed monotonicity
• I²C interface supporting 100kHz and 400kHz clock rates
• Power-on reset to zero-scale for consistent initialization

Applications

• Mobile communications
• Process control and industrial automation
• Portable equipment

Procurement Notes

Verify the specific suffix 'LZ' indicates the zero-scale power-on reset configuration and 'CTS8' denotes the commercial temperature grade (0°C to 70°C) in the 8-lead TSOT-23 package. Confirm that the internal reference mode is selected, as external reference usage requires specific pin connections. Ensure supply voltage remains within the 2.7V to 5.5V range for specified performance.

Selection Notes

Select this part when a dual-channel DAC with low component count is required. The 10-bit resolution offers a balance between accuracy and speed. The zero-scale reset feature is critical if downstream circuits must remain inactive during system startup. For automotive applications requiring -40°C to 125°C operation, the H-grade variant should be considered instead.

Part Context

This component belongs to the LTC2633 family, which includes 8-, 10-, and 12-bit variants. The 'L' suffix designates the 2.5V full-scale internal reference option, while 'H' provides 4.096V. The 'A' grade offers improved linearity (±1.5 LSB INL) compared to the standard grade (±1 LSB INL for 10-bit). This specific model combines the standard accuracy grade with the 10-bit resolution.

Replacement Considerations

Direct replacements include other LTC2633 variants with different resolutions or reset behaviors, such as LTC2633CTS8-LI10 (mid-scale reset) or LTC2633CTS8-HZ10 (4.096V reference). Cross-family alternatives like the LTC2635 (quad channel) require pinout adaptation.