LTC2664CUH-16#PBF

Overview

The LTC2664CUH-16#PBF is a quad-channel, 16-bit digital-to-analog converter (DAC) from Analog Devices. It features SoftSpan technology allowing five independently programmable output ranges up to ±10V: 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V. The device includes an integrated precision reference with a maximum temperature coefficient of 10ppm/°C and built-in rail-to-rail output buffers capable of driving ±10mA. It operates on analog supplies of V+ (4.5V to 15.75V), V– (-15.75V to GND), and VCC (4.5V to 5.5V), with a digital I/O supply (IOVCC) ranging from 1.71V to VCC + 0.3V. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±4 LSB at 16 bits and a settling time of 20 µs for a ±20V step.

Feature Summary

• Quad-channel architecture with independent SoftSpan™ range programming (0V to 5V, 0V to 10V, ±2.5V, ±5V, ±10V).
• Integrated 2.5V precision reference with 10ppm/°C max temperature coefficient; supports external reference input.
• Rail-to-rail output buffers guarantee monotonicity and drive ±10mA load currents.
• A/B toggle capability via dedicated TGP pin or software command for dual-register updates.

Applications

• Optical networking systems requiring precise voltage control.
• High-resolution instrumentation and measurement equipment.
• Data acquisition systems needing multi-channel analog outputs.
• Automatic test equipment (ATE) for signal generation.
• Process control and industrial automation loops.

Procurement Notes

Verify the C-grade suffix indicates a commercial operating temperature range of 0°C to 70°C. Confirm the UH package designation corresponds to the 32-lead (5mm × 5mm) QFN form factor. Ensure the #PBF suffix confirms lead-free compliance. Cross-reference the specific part number against the manufacturer's current product selector guide to confirm active status and availability in tube packaging.

Selection Notes

Select this component when four independent 16-bit DAC channels are required with flexible output voltage spans. The C-grade variant is suitable for commercial environments within 0°C to 70°C; choose I-grade (-40°C to 85°C) or H-grade (-40°C to 125°C) for wider thermal requirements. Verify that the system power supplies can accommodate the specified V+, V–, and VCC ranges. Ensure the SPI interface logic levels match the IOVCC supply voltage.

Part Context

This part belongs to the LTC2664 family of SoftSpan DACs, which also includes 12-bit resolution variants (LTC2664-12) and different temperature grades (I and H). All variants share the same 32-lead QFN package and core functionality but differ in linearity specifications and operating temperature limits. The CUH-16#PBF specifically denotes the commercial grade, 16-bit resolution version in tape and reel or tube formats.

Replacement Considerations

Direct replacements within the same family include LTC2664IUH-16#PBF (Industrial grade) and LTC2664HUH-16#PBF (Automotive/High-temp grade). For lower resolution needs, LTC2664CUH-12#PBF offers 12-bit performance in the same package. Ensure any substitute maintains the 32-lead QFN footprint and compatible supply voltage ranges.