WM2630IDT

Overview

The WM2630IDT is an octal 12-bit digital-to-analog converter featuring eight independent voltage output channels in a single package. It operates on dual supplies ranging from 2.7V to 5.5V and includes an internal programmable voltage reference selectable between 1.024V and 2.048V. The device utilizes a serial interface compatible with microcontrollers and DSPs, supporting daisy-chaining via a data output pin. Key electrical specifications include a typical differential non-linearity of ±0.5 LSBs and integral non-linearity of ±2.0 LSBs. The output buffers provide rail-to-rail swing with a gain of two, configurable for fast or low-power operation modes.

Feature Summary

• Octal architecture containing eight individual 12-bit resistor string DACs
• Internal programmable voltage reference (1.024V or 2.048V) or external input capability
• Serial interface with microcontroller and DSP mode compatibility
• Programmable settling time allowing optimization between speed and power consumption

Applications

• Battery powered test instruments
• Digital offset and gain adjustment circuits
• Programmable loop controllers
• CNC machine tools and motion control devices
• Wireless telephone and communication systems

Procurement Notes

Verify the specific suffix IDT indicates the industrial temperature range variant (-40°C to +85°C). Confirm the package type is 20-pin TSSOP. Ensure the source document matches the Wolfson Microelectronics production data revision 1.1 dated February 2001 for accurate parameter validation.

Selection Notes

Select the WM2630IDT when multiple isolated analog outputs are required in a space-constrained design. The choice between CD and IDT variants depends strictly on the operating temperature environment. Consider the settling time requirements; fast mode offers 1ms typical settling while slow mode reduces power dissipation at the cost of 3ms settling time.

Part Context

This component belongs to the WM2630 series manufactured by Wolfson Microelectronics. The IDT suffix specifically denotes the industrial temperature grade variant, distinct from the commercial CDT version which operates from 0°C to 70°C. Both variants share identical electrical characteristics and pinouts within their respective thermal limits.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and register compatibility if considering alternative octal DACs from other manufacturers.