Dual 10-Bit DAC with 2 /°C Reference, IC Interface

The AD5338R, a member of the nanoDAC® family, is a low power, dual, 10-bit buffered voltage output digital-to-analog converter (DAC). The device includes a 2.5 V, 2 ppm/°C internal reference (enabled by default) and a gain select pin giving a full-scale output of 2.5 V (gain = 1) or 5 V (gain = 2). The AD5338R 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 1.5 mV offset error performance. The device is available in a 3 mm × 3 mm LFCSP and a TSSOP package.

The AD5338R also incorporates a power-on reset circuit and a RSTSEL pin that ensures that the DAC outputs power up to zero scale or midscale and remain there until a valid write takes place. It 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 AD5338R uses a versatile 2-wire serial interface that operates at clock rates up to 400 kHz and includes a VLOGIC pin intended for 1.8 V/3 V/5 V logic.

PRODUCT HIGHLIGHTS

* Precision DC Performance.

TUE: ±0.1% of FSR maximum

Offset error: ±1.5 mV maximum

Gain error: ±0.1% of FSR maximum

* Low Drift 2.5 V On-Chip Reference.

2 ppm/°C typical temperature coefficient

5 ppm/°C maximum temperature coefficient

* Two Package Options.

3 mm × 3 mm, 16-lead LFCSP

16-lead TSSOP

APPLICATIONS

* Optical transceivers

* Base-station power amplifiers

* Process controls (programmable logic controller [PLC] I/O cards)

* Industrial automation

* Data acquisition systems

* 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 full-scale range (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