LTC2688HUJ-16#TRPBF

Overview

The LTC2688HUJ-16#TRPBF is a 16-channel, 16-bit digital-to-analog converter (DAC) from Analog Devices. It features independently programmable SoftSpan output ranges of 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V, and ±15 V. The device includes an integrated precision 4.096 V reference with a maximum temperature coefficient of ±5 ppm/°C. Built-in rail-to-rail output buffers guarantee ±20 mA source/sink current. It supports SPI and MICROWIRE interfaces operating at logic levels as low as 1.71 V and up to 50 MHz. Key specifications include ±3 LSB INL, ±1 LSB DNL, and a settling time of 3.5 µs for a ±5 V step. It is housed in a 40-lead LFCSP package.

Feature Summary

• 16 independent channels with individually programmable output spans up to ±15 V
• Integrated precision 4.096 V reference with ±5 ppm/°C drift
• Rail-to-rail buffered outputs supporting ±20 mA load current
• On-chip analog multiplexer for monitoring output voltage, load current, and junction temperature

Applications

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

Procurement Notes

Verify the ordering suffix #TRPBF confirms the reel packaging format required for automated assembly. Confirm the 'H' grade designation matches the -40°C to +125°C extended industrial temperature range specification. Ensure the specific lot date code aligns with project lifecycle requirements before finalizing procurement orders.

Selection Notes

Select this component when high channel density and wide dynamic range are required in a compact footprint. The independent span programming allows mixing unipolar and bipolar ranges within the same package. Verify that the IOVCC supply voltage supports the system's logic level interface requirements down to 1.71 V.

Part Context

This part belongs to the LTC2688 family of SoftSpan DACs. The HUJ-16 designation indicates the 16-bit resolution variant packaged in a 40-lead Lead Frame Chip Scale Package (LFCSP). Other variants in the series include 12-bit resolutions and WLCSP packages, offering flexibility for different size and performance constraints.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2688 variants such as the LTC2688HUJ-12#TRPBF for 12-bit applications or the LTC2688IUJ-16#TRPBF for commercial temperature ranges. Cross-family substitutes require schematic redesign due to pinout differences.