12-Bit Dual Rail-to-Rail with I²C Interface

The LTC2607/LTC2617/LTC2627 are dual 16-, 14- and 12-bit, 2.7V to 5.5V rail-to-rail voltage output DACs in a 12-lead DFN package. They have built-in high performance output buffers and are guaranteed monotonic.

These parts establish new board-density benchmarks for 16- and 14-bit DACs and advance performance standards for output drive and load regulation in single-supply, voltage-output DACs.

The parts use a 2-wire, I2C compatible serial interface. The LTC2607/LTC2617/LTC2627 operate in both the standard mode (clock rate of 100kHz) and the fast mode (clock rate of 400kHz). An asynchronous DAC update pin (LDAC) is also included.

The LTC2607/LTC2617/LTC2627 incorporate a power-on reset circuit. During power-up, the voltage outputs rise less than 10mV above zero scale; and after power-up, they stay at zero scale until a valid write and update take place. The power-on reset circuit resets the LTC2607-1/LTC2617-1/ LTC2627-1 to mid-scale. The voltage outputs stay at midscale until a valid write and update takes place.

Applications

* Mobile Communications

* Process Control and Industrial Automation

* Instrumentation

* Automatic Test Equipment

* Smallest Pin-Compatible Dual DACs:

* LTC2607: 16 Bits

* LTC2617: 14 Bits

* LTC2627: 12 Bits

* Guaranteed Monotonic Over Temperature

* 27 Selectable Addresses

* 400kHz I2C Interface

* Wide 2.7V to 5.5V Supply Range

* Low Power Operation: 260μA per DAC at 3V

* Power Down to 1μA, Max

* High Rail-to-Rail Output Drive (±15mA, Min)

* Ultralow Crosstalk (30μV)

* Double-Buffered Data Latches

* Asynchronous DAC Update Pin

* LTC2607/LTC2617/LTC2627: Power-On Reset to Zero Scale

* LTC2607-1/LTC2617-1/LTC2627-1: Power-On Reset to Mid-Scale

* Tiny (3mm × 4mm) 12-Lead DFN Package