LTC2636CMS-HMX8#PBF

Overview

The LTC2636CMS-HMX8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 10ppm/°C integrated reference and operates in external reference mode, where the full-scale output is determined by the voltage applied to the REF pin. The device utilizes a 3-wire SPI/MICROWIRE-compatible interface with clock rates up to 50MHz. It includes double-buffered data latches, hardware clear (CLR), and asynchronous DAC update (LDAC) pins. Packaged in a 16-lead MSOP, it offers rail-to-rail outputs, guaranteed monotonicity, and low power consumption of 1.1mA at 5V.

Feature Summary

• Octal 8-Bit Architecture: Eight independent DAC channels with double-buffered input registers for simultaneous updates.
• External Reference Mode: Full-scale output is set by the external REF pin voltage; power-on reset defaults to mid-scale.
• High-Speed Interface: Compatible with standard SPI and MICROWIRE protocols, supporting SCK frequencies up to 50MHz.
• Precision Performance: Guaranteed monotonic operation, ultralow crosstalk (<2.4nV•s), and low noise characteristics.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Battery-Powered Equipment

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence. Confirm the HMX designation ensures the device powers up to mid-scale when using an external reference. Ensure the MSOP package variant matches the PCB footprint requirements for thermal management.

Selection Notes

Select this part when eight independent analog outputs are required in a compact surface-mount package. Choose the HMX suffix if mid-scale initialization is preferred during power-up with an external reference source. Verify that the system supply voltage supports the 4.5V to 5.5V operating range specified for the H-grade internal reference configuration, even when using external references.

Part Context

This component belongs to the LTC2636 family, which includes 12-, 10-, and 8-bit variants in both DFN and MSOP packages. The CMS-HMX8#PBF specifically denotes the commercial temperature grade (0°C to 70°C), MSOP package, 8-bit resolution, and external reference mid-scale reset behavior.

Replacement Considerations

Direct substitutes within the same family include LTC2636CMS-LMX8#PBF (2.5V internal ref, external ref mode) or LTC2636CMS-HMI8#PBF (mid-scale reset in internal ref mode). Cross-family replacements require verifying pin compatibility and interface standards.