LTC2686HUJ-16#TRPBF

Overview

The LTC2686HUJ-16#TRPBF is an 8-channel, 16-bit voltage output SoftSpan DAC from Analog Devices. It features 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 a precision internal 4.096 V reference with ±10 ppm/°C drift and rail-to-rail output buffers capable of sourcing or sinking up to 55 mA. It supports SPI and MICROWIRE-compatible 3-wire serial interfaces operating on logic levels as low as 1.71 V. Key specifications include ±3 LSB maximum INL error, 36 µs settling time for ±15 V ranges, and operation over an extended temperature range of -40°C to +125°C.

Feature Summary

• Eight independent channels with full 16-bit resolution across five selectable output ranges (±15 V max).
• Integrated precision 4.096 V reference with ±10 ppm/°C maximum temperature coefficient.
• Rail-to-rail output buffers guaranteeing ±55 mA drive capability.
• Supports asynchronous toggle and sinusoidal dither operations via three multifunctional pins.

Applications

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

Procurement Notes

Verify the HUJ suffix indicates the 40-lead LFCSP package variant with the -H grade for extended temperature operation (-40°C to +125°C). Confirm the #TRPBF suffix denotes tape-and-reel packaging. Ensure compatibility with system power supplies, noting the analog supply range of 4.75 V to 5.25 V and digital I/O range of 1.71 V to VCC + 0.3 V.

Selection Notes

Select this component when eight isolated channels with high voltage swings up to ±15 V are required in a compact footprint. The 16-bit resolution and ±3 LSB INL make it suitable for high-precision applications. Consider the external reference mode if lower noise or different reference voltages are needed, though the internal 4.096 V reference simplifies design. Ensure PCB layout accounts for thermal dissipation given the LFCSP package.

Part Context

This part belongs to the LTC2686 family of SoftSpan DACs, which allows flexible output range programming without external resistors. The HUJ-16 designation specifies the 16-bit resolution version in the 40-lead LFCSP package. The -H suffix extends the operating temperature range compared to standard industrial grades, making it suitable for harsh environments.

Replacement Considerations

Direct pin-compatible replacements within the same package may be limited due to specific voltage and resolution requirements. Check for other LTC2686 variants with different suffixes for package or temperature differences. Cross-family comparisons should focus on channel count, resolution, and maximum output voltage capabilities.