LTC2637IDE-HMI8#PBF

Overview

The LTC2637IDE-HMI8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 4.096V. The device operates on a single 4.5V to 5.5V supply and communicates 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 ±1 LSB, and ultralow DAC-to-DAC crosstalk below 3nV•s. The part incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale.

Feature Summary

• Octal 8-bit resolution with rail-to-rail buffered voltage outputs
• Integrated 4.096V precision reference with 10ppm/°C drift
• I2C-compatible serial interface with selectable slave addresses
• Power-on reset to mid-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix HMI8 corresponds to the MSOP package, Industrial temperature grade, and Mid-Scale power-on reset configuration as defined in the manufacturer's selection guide. Confirm that the #PBF designation indicates lead-free compliance and tube packaging. Ensure the design supports the required 4.5V to 5.5V supply range for the H-grade variant.

Selection Notes

Select this component when eight independent voltage outputs are required within a compact footprint. The H-grade suffix denotes operation from 4.5V to 5.5V with a 4.096V full-scale output, suitable for applications needing higher voltage swings than the L-grade. The I-grade ensures functionality across the industrial temperature range of –40°C to 85°C. Consider the external reference capability if system-level calibration requires a different full-scale voltage.

Part Context

This part belongs to the LTC2637 family, which includes 12-bit, 10-bit, and 8-bit variants. The 'H' indicates the 4.096V full-scale version requiring a minimum 4.5V supply, while 'I' specifies the industrial temperature rating. The 'MS' package type is a 16-lead MSOP, offering more address pins (CA0, CA1, CA2) compared to the 14-lead DFN. This specific configuration targets cost-sensitive multi-channel applications requiring moderate precision.

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-LMI8#PBF for lower voltage operation or LTC2637IDE-HMI10#PBF/LTC2637IDE-HMI12#PBF for higher resolution. Verify pin compatibility between the 16-lead MSOP packages. For applications requiring different reset behaviors, consider variants with Z (Zero-Scale) or MX (External Reference Mid-Scale) suffixes.