Technology Corp. introduces the LTC2655,
a quad voltage output 16- and 12-bit digital-to-analog converter (DAC) family
with internal reference and I2C interface. The LTC2655 DACs achieve
16-bit performance of +4LSB INL maximum over temperature, a factor of
four better than the closest 16-bit quad competitor. The LTC2655 offers the
lowest offset error +2mV (max) and lowest gain error 0.1 percent (max), a
combination that ensures the device retains accuracy near the supply rails and
provides users with a wider effective output range. The LTC2655's precision
specifications make it ideal for multichannel, open- and closed-loop systems.
Applications include mobile communication, instrumentation, process control and
industrial automation, automated test equipment (ATE) and automotive systems.
The LTC2655's integrated reference achieves 2ppm/C typical and 10ppm/C maximum
temperature coefficient. It is offered in small 20-pin 4 x 4 mm QFN and 16-pin
narrow SSOP packages, providing space savings in densely packed circuit boards.
AC performance of 9.1us settling time for a half-scale step and <1nV•s
crosstalk results in minimal disturbance between DAC channels. The LTC2655
operates from a single 2.7 to 5.5V supply and communicates via a 2-wire I2
compatible interface at up to 400kHz.
The LTC2655 offers a wide range of options to meet application-specific requirements.
Designers can choose between 16- or 12-bit resolution and an internal 1.25 or
2.048V reference, which produce a full-scale output voltage of 2.5 or 4.096V.
Alternatively, an external reference up to half the supply voltage can be used
for rail-to-rail operation. The LTC2655 includes 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 applied. The device also
includes a hardware load-DAC (LDAC) pin, three address pins for selecting 27
C addresses or 1 global address, and a REFLO pin.
16-bit and 12-bit DACs and demo boards are now available. Pricing begins at
$5.04 each for the 12-bit options and $12.29 each for the 16-bit options in