LTC2636CMS-LZ8#PBF

Overview

The LTC2636CMS-LZ8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated internal reference with a temperature coefficient of 10ppm/°C and a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes double-buffered data latches and guarantees monotonicity over the specified temperature range.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels in a 16-lead MSOP package
• Integrated 2.5V full-scale reference with 10ppm/°C drift
• Power-on reset circuitry configured to clear outputs to zero-scale
• Ultralow crosstalk between DACs (<2.4nV•s) and rail-to-rail output buffers

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Optical networking devices

Procurement Notes

Verify the specific suffix LZ8 indicates the 16-lead MSOP package, 8-bit resolution, 2.5V internal reference, and zero-scale power-on reset configuration. Confirm the C grade corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure compatibility with standard SPI interfaces requiring 3-wire communication.

Selection Notes

Select this component when eight independent low-cost DAC channels are required in a compact surface-mount package. The zero-scale power-on reset is critical for applications where downstream circuits must remain inactive during system initialization. Choose the external reference variant if a different full-scale voltage or higher precision reference is needed.

Part Context

This part belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants within the family differ by package type (DFN or MSOP), temperature grade (Commercial, Industrial, Automotive), and power-on reset behavior (zero-scale or mid-scale). The CMS designation specifically identifies the MSOP package and commercial temperature rating.

Replacement Considerations

Direct replacements include other LTC2636 variants with matching pinouts but potentially different resolutions or reset behaviors. For pin-compatible alternatives with different features, consider the LTC2637 series, which offers I2C interface compatibility instead of SPI.