Features

• Precision Reference 10ppm/°C Max
• Maximum INL Error: ±4LSB at 16-Bits
• Low ±2mV (Max) Offset Error
• Guaranteed Monotonic Over Temperature
• Selectable Internal or External Reference
• 2.7V to 5.5V Supply Range (LTC2654-L)
• Integrated Reference Buffers
• Ultralow Crosstalk Between DACs (<3nV•s)
• Power-on-Reset to Zero-Scale/Mid-Scale
• Asynchronous DAC Update Pin
• Tiny 20-Lead 4mm × 4mm QFN and 16-Lead Narrow SSOP Packages

Typical Application

Description

The LTC2654 is a family of quad 16-/12-bit rail-to-rail DACs with integrated 10ppm/°C maximum reference . The DACs have built-in high performance, rail-to-rail, output buffers and are guaranteed monotonic. The LTC2654-L has a full-scale output of 2.5V with the integrated reference and operates from a single 2.7V to 5.5V supply. The LTC2654-H has a full-scale output of 4.096V with the integrated reference and operates from a 4.5V to 5.5V supply. Each DAC can also operate with an external reference, which sets the full-scale output to 2 times the external reference voltage.

These DACs communicate via a SPI/MICROWIRE™ compatible 4-wire serial interface which operates at clock rates up to 50MHz. The LTC2654 incorporates a power-on reset circuit that is controlled by the PORSEL pin. If PORSEL is tied to GND the DACs reset to zero-scale. If PORSEL is tied to V_CC, the DACs reset to mid-scale.