LTC2686CUJ-12#PBF

Overview

The LTC2686CUJ-12#PBF is an 8-channel, 12-bit voltage output digital-to-analog converter (DAC) featuring SoftSpan technology. It integrates a precision 4.096 V reference with a maximum temperature coefficient of ±10 ppm/°C. The device supports independently programmable output ranges including 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V, and ±15 V. Each channel provides rail-to-rail output buffers capable of sourcing or sinking up to 55 mA. Key performance metrics include a maximum integral nonlinearity (INL) error of ±0.75 LSB and a settling time of 3.5 µs for a ±5 V step. The component operates on a single analog supply voltage (VCC) ranging from 4.75 V to 5.25 V.

Feature Summary

• Eight independent channels with individually programmable SoftSpan output ranges up to ±15 V
• Integrated precision 4.096 V reference with ±10 ppm/°C maximum temperature coefficient
• Built-in rail-to-rail output drivers guaranteeing ±55 mA source/sink current capability
• Analog multiplexer for monitoring DAC output voltages, load currents, and junction temperature

Applications

• Optical networking systems
• Precision instrumentation
• Data acquisition equipment
• Automatic test equipment
• Process control and industrial automation

Procurement Notes

Verify the specific suffix 'CUJ' corresponds to the commercial temperature range (0°C to 70°C) and the 64-ball WLCSP package configuration. Confirm that the internal reference mode meets system noise requirements, as external references may be necessary for lower noise applications. Ensure PCB layout adheres to thermal resistance guidelines to maintain reliability under high load conditions.

Selection Notes

Select this model for applications requiring multiple independent voltage outputs with flexible span configurations. The 12-bit resolution is suitable for general-purpose control loops where ±0.75 LSB INL is acceptable. Consider the WLCSP package constraints regarding soldering profiles and exposed pad thermal management. Verify that the IOVCC logic levels are compatible with the host microcontroller interface.

Part Context

This component belongs to the LTC2686 family of SoftSpan DACs, which also includes 16-bit variants (LTC2686-16). The -12 designation indicates 12-bit resolution, offering improved linearity compared to the 16-bit version's ±3 LSB INL. The CUJ suffix identifies the commercial grade operating temperature range and the specific 64-ball wafer-level chip-scale package format.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.