LTC2656CIFE-L16#PBF

Overview

The LTC2656CIFE-L16#PBF is an octal, 16-bit digital-to-analog converter (DAC) from Analog Devices. It features eight rail-to-rail output channels with built-in high-performance buffers and a precision integrated reference yielding a full-scale output of 2.5V. The device operates on a single 2.7V to 5.5V supply and communicates via a 4-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. It guarantees monotonicity over temperature and includes a power-on reset circuit configurable for zero-scale or mid-scale initialization.

Feature Summary

• Octal architecture with 16-bit resolution and ±12LSB maximum INL error
• Integrated 10ppm/°C precision reference providing 2.5V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (<1nV•s)
• Configurable power-on reset to zero-scale or mid-scale via PORSEL pin

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Instrumentation
• Automatic Test Equipment
• Automotive Systems

Procurement Notes

Verify the C-grade electrical specification indicating a maximum integral nonlinearity of ±12LSB at 16 bits. Confirm the package type is the 20-lead thermally enhanced TSSOP (FE). Ensure the operating temperature range matches commercial requirements of 0°C to 70°C. Check that the lead-free finish designation (#PBF) aligns with assembly standards.

Selection Notes

Select this part when eight independent 16-bit voltage outputs are required within a compact footprint. The L-option provides a 2.5V full-scale range suitable for 2.7V to 5.5V single-supply systems. Choose the C-grade variant if ±12LSB linearity meets system accuracy needs, offering a cost-effective alternative to the B-grade ±4LSB version.

Part Context

This component belongs to the LTC2656 family of octal DACs. The suffix 'C' denotes the commercial temperature grade (0°C to 70°C), while 'I' indicates industrial grade (-40°C to 85°C). The 'L' specifies the 2.5V internal reference option, distinct from the 'H' option which provides 4.096V. The 'FE' code identifies the 20-lead thermally enhanced TSSOP package.

Replacement Considerations

Publicly confirmed substitutes include other members of the LTC2656 family such as the LTC2656BCIFE-L16#PBF for higher accuracy (±4LSB INL) or the LTC2656CIFE-H16#PBF for a 4.096V full-scale output range. Verify pin compatibility and thermal performance when swapping between packages.