LTC2636HMS-HMX12#PBF

Overview

The LTC2636HMS-HMX12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 4.096V full-scale output and operates on a single 4.5V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes double-buffered data latches, ultralow crosstalk between DACs (<2.4nV•s), and a power-on reset circuit that sets outputs to mid-scale in external reference mode. The component is housed in a 16-lead MSOP package and is guaranteed monotonic over the –40°C to 125°C automotive temperature range.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with maximum INL error of ±2.5LSB.
• Integrated Precision Reference: Features a 4.096V full-scale internal reference with a low-drift coefficient of ±10ppm/°C.
• Automotive Temperature Grade: Operates reliably within the extended –40°C to 125°C temperature range.
• Low Power Consumption: Draws typical supply current of 1.1mA at VCC = 5V with internal reference enabled.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific ordering suffix HMX12 to confirm the 12-bit resolution, mid-scale reset in external reference mode, and 4.096V full-scale voltage configuration. Ensure the MSOP package type matches the PCB footprint requirements. Confirm RoHS compliance status as indicated by the #PBF suffix. Check for any specific tape and reel packaging constraints if automated assembly is planned.

Selection Notes

Select this part when eight independent 12-bit DAC channels are required in a compact surface-mount package. The H-grade ensures operation in high-temperature automotive environments. Choose the HMX variant if mid-scale initialization is preferred during power-up in external reference configurations. Verify that the system supply voltage falls within the 4.5V to 5.5V range required for the H-series devices.

Part Context

The LTC2636 family comprises octal DACs available in 12-, 10-, and 8-bit resolutions. Variants include L-series (2.5V full-scale, 2.7V–5.5V supply) and H-series (4.096V full-scale, 4.5V–5.5V supply). Packages include 14-lead DFN and 16-lead MSOP. Reset options cover zero-scale or mid-scale initialization in internal or external reference modes. The HMX12 specifically denotes the 12-bit H-grade MSOP version with external reference mid-scale reset.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. When evaluating alternatives, ensure compatibility with the 3-wire SPI interface, 16-lead MSOP package, and 4.5V–5.5V operating voltage range. Verify that replacement components meet the same automotive temperature grade and integral nonlinearity specifications.