LTC2637CMS-HMI8#PBF

Overview

The LTC2637CMS-HMI8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 16-lead MSOP package and operates within a supply voltage range of 4.5V to 5.5V. The device incorporates an integrated precision reference providing a full-scale output of 4.096V with a temperature coefficient of 10ppm/°C. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±0.5 LSB, a settling time of 3.9µs at VCC = 3V, and double-buffered data latches for glitch-free updates.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels in a single 16-lead MSOP package
• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• Rail-to-rail output buffers guaranteed monotonic over the operating temperature range
• Ultralow crosstalk between DACs (<3nV•s) and double-buffered data latches

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel signal generation
• Portable battery-powered instrumentation
• Automotive electronic control units

Procurement Notes

Verify the specific ordering suffix HMI8 corresponds to the 8-bit resolution, mid-scale power-on reset behavior, and internal reference mode as defined in the manufacturer's selection guide. Confirm the MSOP package type matches the design requirements. Ensure compatibility with the required I2C bus speed and address configuration pins CA0, CA1, and CA2 before finalizing procurement.

Selection Notes

Select this component when eight low-cost, moderate-resolution voltage outputs are needed in a compact footprint. The 4.096V full-scale range suits applications powered by 5V rails. Consider the external reference option if higher accuracy or different voltage spans are required. Verify that the 4.5V minimum supply voltage aligns with the system power budget, as the lower-voltage LTC2637-L variant supports operation down to 2.7V.

Part Context

This part belongs to the LTC2637 family of octal DACs, which also includes 10-bit and 12-bit variants. The 'H' designation indicates the high-voltage version optimized for 4.5V to 5.5V supplies, distinguishing it from the 'L' series designed for 2.7V to 5.5V operation. The 'I' grade specifies an industrial temperature range of –40°C to 85°C, while the 'H' grade extends this to 125°C.

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-HMI10#PBF (10-bit) and LTC2637IMS-HMI12#PBF (12-bit), which share identical pinouts and interfaces but offer higher resolution. For lower voltage applications, the LTC2637LMS-HMI8#PBF provides equivalent functionality with a wider input voltage range starting at 2.7V.