LTC2636IMS-LMI12#PBF

Overview

The LTC2636IMS-LMI12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead MSOP package. It features an integrated precision reference providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C. The device operates on a single 2.7V to 5.5V supply and communicates via a 3-wire SPI/MICROWIRE-compatible serial interface supporting clock rates up to 50MHz. Key electrical characteristics include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 4.4µs at 3V, and a typical supply current of 0.9mA. The unit incorporates double-buffered data latches and guarantees monotonicity over the specified operating range.

Feature Summary

• Octal architecture with 8 independent 12-bit DAC channels in a compact 16-lead MSOP package
• Integrated 10ppm/°C precision reference yielding a 2.5V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (<2.4nV•s) between channels
• Power-on reset configured 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 infrastructure

Procurement Notes

Verify the specific ordering suffix LMI12#PBF against the manufacturer's official documentation to confirm the 12-bit resolution, mid-scale power-on reset behavior, and tube packaging format. Ensure compatibility with the required industrial temperature range (-40°C to 85°C) for the target application environment.

Selection Notes

Select this component when eight simultaneous analog outputs are required within space-constrained designs. The LMI12 variant is appropriate for applications needing mid-scale initialization upon power-up rather than zero-scale. Consider the 4.4µs settling time and ±2.5 LSB INL specification against system accuracy requirements.

Part Context

This part belongs to the LTC2636 family of octal DACs, which also includes 10-bit and 8-bit variants (LTC2636IMS-LMI10, LTC2636IMS-LMI8). The family shares identical pinouts and interface protocols but differs in resolution, linearity specifications, and settling times. Other suffixes indicate different reset behaviors or external reference configurations.

Replacement Considerations

Direct functional substitutes within the same package and pinout include LTC2636IMS-LMI10#PBF and LTC2636IMS-LMI8#PBF. These alternatives offer lower resolutions and tighter linearity specs but maintain software and hardware compatibility.