LTC2688HUJ-12#PBF

Overview

The LTC2688HUJ-12#PBF is a 16-channel, 12-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features SoftSpan technology allowing independently programmable output ranges of 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V, and ±15 V. The device includes an internal precision 4.096 V reference with a maximum temperature coefficient of ±5 ppm/°C. Key electrical specifications include a maximum integral nonlinearity (INL) of ±0.75 LSB, a settling time of 28 µs, and rail-to-rail output buffers capable of sourcing or sinking up to ±20 mA. It operates on a single analog supply voltage between 4.75 V and 5.25 V.

Feature Summary

• 16 independent channels with individually programmable SoftSpan output ranges
• Integrated precision 4.096 V reference with ±5 ppm/°C temperature coefficient
• Rail-to-rail output buffers guaranteeing ±20 mA drive capability
• Built-in analog multiplexer for monitoring 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 HUJ-12#PBF against the manufacturer's ordering guide to confirm package type (LFCSP), temperature grade (H: -40°C to +125°C), and resolution (12-bit). Ensure compatibility with required output voltage spans and interface logic levels before procurement.

Selection Notes

Select this component when high channel count and flexible output voltage ranges are required in a compact footprint. The internal reference simplifies design by eliminating external components. Verify that the ±20 mA output current meets load requirements and that the SPI interface timing aligns with the host controller capabilities.

Part Context

This part belongs to the LTC2688 family of SoftSpan DACs. The 'HUJ' designation indicates a 6 mm × 6 mm, 40-lead LFCSP package. The '12' suffix specifies 12-bit resolution, while the 'H' denotes the extended industrial temperature range (-40°C to +125°C). Other variants exist with 16-bit resolution or different packaging options like WLCSP.

Replacement Considerations

Direct pin-compatible replacements within the same family include the LTC2688-16 variant for 16-bit resolution. Cross-family comparisons should consider the LTC2687 or LTC2689 if fewer channels or different performance metrics are acceptable.