LTC2686HUJ-16#PBF

Overview

The LTC2686HUJ-16#PBF 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 temperature coefficient. Key specifications include a maximum INL error of ±3 LSB, rail-to-rail output buffers capable of driving ±55 mA, and support for SPI and MICROWIRE interfaces. It operates on analog supplies up to ±15 V and digital I/O supplies from 1.71 V to 5.25 V.

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 stability.
• Rail-to-rail output buffers providing ±55 mA drive capability.
• Built-in analog multiplexer for monitoring output voltages, load currents, and junction temperature.

Applications

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

Procurement Notes

Verify the specific suffix HUJ-16#PBF against the manufacturer's ordering guide to confirm the package type (LFCSP) and extended temperature range (-40°C to +125°C). Ensure compatibility with system power supply rails and logic levels before procurement.

Selection Notes

Select this component when eight high-precision, bipolar voltage outputs are required in a single package. The SoftSpan feature allows flexible range configuration per channel. Consider the ±55 mA output current and integrated mux if signal conditioning or monitoring overhead needs reduction.

Part Context

This part belongs to the LTC2686 family of SoftSpan DACs. The 'H' designation indicates the -40°C to +125°C operating temperature range, while 'UJ' specifies the 40-lead LFCSP package. The '-16' suffix denotes the 16-bit resolution variant.

Replacement Considerations

Direct replacements within the same family include the LTC2686IUJ-16#PBF for industrial temperature range applications. Verify pinout and register compatibility when substituting between different resolution variants (12-bit vs 16-bit) or package types.

FAQ

What is the maximum output current capability of the LTC2686?

The built-in rail-to-rail output buffers can source or sink up to ±55 mA.

Can each channel have a different output range?

Yes, each of the eight channels has independently programmable output ranges from 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V, or ±15 V.

How does the device handle fault detection?

The FAULT pin pulls low when the junction temperature exceeds 160°C or when an SPI transaction error occurs.