LTC2637CDE-LMX10#PBF

Overview

The LTC2637CDE-LMX10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 14-lead DFN package. It features an integrated precision reference with a temperature coefficient of 10ppm/°C and a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V 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 ±1 LSB, a settling time of 4.1µs at 3V, and double-buffered data latches for glitch-free updates.

Feature Summary

• Octal architecture providing eight independent 10-bit DAC channels with rail-to-rail output buffers.
• Integrated 2.5V internal reference with low drift of 10ppm/°C.
• I2C-compatible serial interface with selectable slave addresses via CA0 pin.
• Power-on reset circuit configured to initialize outputs to mid-scale when using the external reference mode.

Applications

• Mobile communications systems
• Process control and industrial automation
• Portable equipment requiring low power consumption

Procurement Notes

Verify that the component matches the specific commercial temperature grade (0°C to 70°C) indicated by the 'C' suffix. Confirm the package type is the 14-lead DFN (4mm × 3mm) as specified by the 'DE' designation. Ensure the ordering suffix '#PBF' corresponds to lead-free packaging requirements for the target assembly process.

Selection Notes

Select this part when eight simultaneous analog outputs are required within a compact footprint. The L-series variant is appropriate for applications needing a 2.5V full-scale range powered by a 2.7V to 5.5V supply. Choose the MX suffix if the system design requires the DACs to reset to mid-scale upon power-up while utilizing an external reference voltage source.

Part Context

This component belongs to the LTC2637 family, which includes 8-bit, 10-bit, and 12-bit resolution variants. The CDE-LMX10#PBF specifically denotes the commercial temperature grade, 14-lead DFN package, external reference mid-scale reset configuration, and 10-bit resolution. Other family members offer different full-scale voltages or industrial temperature ranges.

Replacement Considerations

Direct substitutes within the same family include the LTC2637CDE-LMI10#PBF (internal reference reset) and the LTC2637CDE-LZ10#PBF (zero-scale reset). For higher resolution needs, the LTC2637CDE-LMX12#PBF provides 12-bit accuracy with identical pinout and interface characteristics.