Quad, 14-Bit DAC+ with 2 ppm/°C On-Chip Reference and SPI Interface

The AD5685R nanoDAC+™ is a quad, 14-bit, rail-to-rail, voltage output DAC. The device includes a 2.5V, 2ppm/˚C internal reference (enabled by default) and a gain select pin giving a full-scale output of 2.5V (gain=1) or 5V (gain=2).

The device operates from a single 2.7 V to 5.5 V supply, is guaranteed monotonic by design and exhibits less than 0.1% FSR gain error and 1.5mV offset error performance. The device is available in a 3mm X 3mm LFCSP and a TSSOP package.

The AD5685R also incorporates a power-on-reset circuit and a RSTSEL pin that ensures the DAC outputs power up to zero-scale or midscale, and remain there until a valid write takes place. Each device contains a per-channel power-down feature that reduces the current consumption of the device to 4 uA at 3 V while in power-down mode.

The AD5685R employs a versatile SPI interface that operates at clock rates up to 50 MHz and includes a VLOGIC pin intended for 1.8V/3V/5V logic.

PRODUCT HIGHLIGHTS

* High Relative Accuracy: AD5685R (14-bit): ±1LSB INL max

* Low drift on-chip reference: 2.5V, 2ppm/°C temperature drift

* Two package options: 3mm × 3mm 16-lead LFCSP or 16-lead TSSOP

APPLICATIONS

* Optical transceivers

* Base-station power amplifiers

* Process control (PLC I/O cards)

* Industrial automation

* Data acquisition systems

* High relative accuracy (INL): ±2 LSB maximum at 16 bits

* Low drift 2.5 V reference: 2 ppm/°C typical

* Tiny package: 3 mm × 3 mm, 16-lead LFCSP

* Total unadjusted error (TUE): ±0.1% of FSR maximum

* Gain error: ±0.1% of FSR maximum

* High drive capability: 20 mA, 0.5 V from supply rails