The AD5685R nanoDAC+ is a quad, 12-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.
- 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
- Offset error: ±1.5 mV maximum
- Gain error: ±0.1% of FSR maximum
- High drive capability: 20 mA, 0.5 V from supply rails
- User selectable gain of 1 or 2 (GAIN pin)
- Reset to zero scale or midscale (RSTSEL pin)
- 1.8 V logic compatibility
- 50 MHz SPI with readback or daisy chain
- Low glitch: 0.5 nV-sec
- Robust 4 kV HBM and 1.5 kV FICDM ESD rating
- Low power: 3.3 mW at 3 V
- 2.7 V to 5.5 V power supply
- -40°C to +105°C temperature range
- Applucation:
- Optical transceivers
- Base-station power amplifiers
- Process control (PLC I/O cards)
- Industrial automation
- Data acquisition systems
