LTC2637IDE-LZ10#PBF

Overview

The LTC2637IDE-LZ10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, double-buffered data latches, and a power-on reset circuit configured to reset outputs to zero-scale. The component is housed in a 16-lead MSOP package and is guaranteed monotonic over the industrial temperature range of –40°C to 85°C.

Feature Summary

• Octal architecture with eight independent 10-bit DAC channels
• Integrated 10ppm/°C precision reference yielding 2.5V full-scale output
• I²C serial interface with selectable slave addresses via CA0 pin
• Power-on reset function defaults outputs to zero-scale

Applications

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

Procurement Notes

Verify that the specific ordering suffix #PBF confirms lead-free construction and RoHS compliance as per manufacturer standards. Confirm the package type matches the required 16-lead MSOP footprint for PCB layout. Ensure the I²C address configuration pins are correctly terminated to avoid bus conflicts in multi-device designs.

Selection Notes

Select this part when eight low-cost, low-power voltage outputs are required with moderate accuracy. The 10-bit resolution offers a balance between performance and channel density. Choose the 'L' variant for single-supply operation down to 2.7V. Verify that the internal reference drift meets system requirements or consider external reference variants if tighter stability is needed.

Part Context

This component belongs to the LTC263x family of octal DACs, which also includes 12-bit and 8-bit resolutions. The 'I' designation indicates the industrial temperature grade (-40°C to 85°C), while 'H' denotes the extended automotive grade (-40°C to 125°C). The 'Z' suffix specifies the power-on reset behavior to zero-scale, distinguishing it from mid-scale reset options.

Replacement Considerations

Direct functional equivalents within the same package include other LTC2637 variants with different resolutions (LTC2637IDE-LZ12#PBF for 12-bit or LTC2637IDE-LZ8#PBF for 8-bit) or reset configurations. Cross-family replacements may require schematic adjustments due to differing pinouts or interface protocols.