LTC2637HMS-HMI12#PBF

Overview

The LTC2637HMS-HMI12#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 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) of ±2.5 LSB, a settling time of 5µs at 12 bits, and ultralow DAC-to-DAC crosstalk of 3nV•s. It incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale.

Feature Summary

• Octal architecture with 12-bit resolution and rail-to-rail output buffers
• 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 package type matches the design requirements, as the MSOP variant is distinct from the DFN option. Confirm that the H-grade temperature rating (-40°C to 125°C) aligns with the operational environment. Ensure the I2C address configuration pins are correctly terminated on the PCB to prevent bus conflicts.

Selection Notes

Select this part when multiple independent voltage outputs are required in a compact footprint. The H-grade suffix indicates suitability for automotive or high-temperature industrial applications compared to the C or I grades. Verify that the 4.5V minimum supply voltage is compatible with the system power rails, as the L-grade variant supports lower voltages down to 2.7V.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes 8-bit and 10-bit resolutions. The 'H' designation specifies the automotive temperature range and 4.096V internal reference, while 'MS' denotes the 16-lead MSOP package. Other variants like LTC2637DE offer the same functionality in a smaller DFN form factor.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2637HMS-HMX12#PBF (external reference mode) or LTC2637HMS-HZ12#PBF (zero-scale reset). For different resolutions, consider LTC2637HMS-HMI10#PBF or LTC2637HMS-HMI8#PBF.