Quad, 16-Bit DAC+ with SPI Interface

The AD5686/AD5684, a member of the nanoDAC+™ family, is a low power, quad, 16-/12-bit buffered voltage output DAC. The device includes a gain select pin giving a full-scale output of 2.5 V (gain = 1) or 5 V (gain = 2). All devices operate 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 1.5 mV offset error performance. The devices are available in a 3 mm × 3 mm LFCSP and a TSSOP package.

The AD5686/AD5684 also incorporate a power-on reset circuit and a RSTSEL pin that ensures that the DAC outputs power up to zero scale or midscale and remain at that level until a valid write takes place. Each part contains a per-channel power-down feature that reduces the current consumption of the device to 4 μA at 3 V while in power-down mode.

The AD5686/AD5684 employ a versatile SPI interface that operates at clock rates up to 50 MHz, and all devices contain a VLOGIC pin intended for 1.8 V/3 V/5 V logic.

Product Highlights

* High Relative Accuracy (INL): ±2 LSB maximum

* Excellent DC Performance.

Total unadjusted error: ±0.1% of FSR maximum

Offset error: ±1.5 mV maximum

Gain error: ±0.1% of FSR maximum

* Two Package Options: 3 mm × 3 mm, 16-lead LFCSP and 16-lead TSSOP

Applications

* Digital gain and offset adjustment

* Programmable attenuators

* Process control (PLC I/O cards)

* Industrial automation

* Data acquisition systems

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

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

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

* Offset error: ±1.5 mV maximum

* Gain error: ±0.1% of FSR maximum

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