LTC2657 Datasheet | Linear Technology

Features n n n n n n n n n n LTC2657 Octal I2C 16-/12-Bit Rail-to-Rail DACs with 10ppm/°C Max Reference DESCRIPTION The LTC®2657 is a family of octal I2C 16-/12-Bit Rail-to Rail DACs with Integrated 10ppm/°C Max Reference. The DACs have built-in high performance, rail-to-rail, output buffers and are guaranteed monotonic. The LTC2657-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 LTC2657-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. The parts use a 2-wire I2C patible serial interface. The LTC2657 operates in both the standard mode (maximum clock rate of 100k Hz) and the fast mode (maximum clock rate of 400k Hz). The LTC2657 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 at power-up. If PORSEL is tied to VCC , the DACs reset to mid-scale at power-up. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5396245, 6891433 and patent pending. Integrated Reference 10ppm/°C Max Maximum INL Error: ±4LSB Guaranteed Monotonic Over Temperature Selectable Internal or External Reference 2.7V to 5.5V Supply Range (LTC2657-L) Integrated Reference Buffers Ultralow Crosstalk between DACs(0.8n V- s) Power-On-Reset to Zero-Scale/Mid-Scale 400k Hz I2C Interface Tiny 20-Lead 4mm × 5mm QFN and 20-Lead Thermally enhanced TSSOP packages APPLICATIONS n n n n n Mobile munications Process Control and Industrial Automation Instrumentation Automatic Test Equipment Automotive BLOCK DIAGRAM .. REFP GND REGISTER REGISTER REGISTER REGISTER REFLO VOUTA DAC A VCC REF INTERNAL REFERENCE REFIN/OUT INL vs Code...