Date: 10/08/2010

16- and 12-bit DACs from Linear with full scale O/Ps of 2.5V and 4.096V

Linear Technology has introduced the LTC2655, a family of quad voltage output 16- and 12-bit rail to rail digital-to-analog converter (DAC) with internal reference and I2C interface. These DACs offers a maximum INL error of ±4LSB for 16-bit DACs. The LTC2655 offers the low offset error ±2mV (max) and low gain error 0.1% (max). The LTC2655's is suggested for multichannel, open loop and closed loop system and is suitable for applications such as mobile communication, instrumentation, process control and industrial automation, automated test equipment (ATE) and automotive systems.

The LTC2655-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 LTC2655-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. Therefore the LTC2655 allows designers to choose between 16- or 12-bit resolution and an internal reference from 1.25V or 2.048V to produce a full-scale output voltage of 2.5V or 4.096V. The parts communicate using a 2-wire I2C compatible interface at up to 100kHz in standard mode and at up to 400kHz in fast modes.

The LTC2655's integrated reference achieves 2ppm/°C typical and 10ppm/°C maximum temperature coefficient. These DACs offer an AC performance of 9.1us settling time for a half-scale step and crosstalk of less than 1nVos thus resulting in minimal disturbance between DAC channels.

The LTC2655 offers an external reference up to half the supply voltage that can be used for rail-to-rail operation. These devices include a hardware option to power up the DAC outputs at zero-scale or mid-scale, allowing more flexibility for designs that cannot be forced to ground when power is first applied. The device also includes a hardware load-DAC (LDAC) pin, three address pins for selecting 27 unique I2C addresses or 1 global address, and a REFLO pin.

Package: Small 20-Lead 4mm x 4mm QFN & 16-Lead Narrow SSOP

Price:
The LTC2655 16-bit DAC is starts at each US$12.29 for 1,000-piece quantities.
The LTC2655 12-bit DAC is starts at each US$5.04 for 1,000-piece quantities.

Availability: Now