The DAC7568, DAC8168, and DAC8568 are low-power, voltage-output, eight-channel, 12-, 14-, and 16-bit digital-to-analog converters (DACs), respectively. These devices include a 2.5V, 2ppm/°C internal reference (disabled by default), giving a full-scale output voltage range of 2.5V or 5V. The internal reference has an initial accuracy of 0.004% and can source up to 20mA at the VREFIN/VREFOUT pin. These devices are monotonic, providing excellent linearity and minimizing undesired code-to-code transient voltages (glitch).
They use a versatile 3-wire serial interface that operates at clock rates up to 50MHz. The interface is compatible with standard SPI™, QSPI™, Microwire™, and digital signal processor (DSP) interfaces.
FEATURES
• Relative Accuracy:
– DAC7568 (12-Bit): 0.3 LSB INL
– DAC8168 (14-Bit): 1 LSB INL
– DAC8568 (16-Bit): 4 LSB INL
• Glitch Energy: 0.1nV-s
• Internal Reference:
– 2.5V Reference Voltage (disabled by default)
– 0.004% Initial Accuracy (typ)
– 2ppm/°C Temperature Drift (typ)
– 5ppm/°C Temperature Drift (max)
– 20mA Sink/Source Capability
• Power-On Reset to Zero Scale or Midscale
• Ultra-Low Power Operation: 1.25mA at 5V Including Internal Reference Current
• Wide Power-Supply Range: +2.7V to +5.5V
• Monotonic Over Entire Temperature Range
• Low-Power Serial Interface with Schmitt-Triggered Inputs: Up to 50MHz
• On-Chip Output Buffer Amplifier with Rail-to-Rail Operation
• Temperature Range: –40°C to +125°C
APPLICATIONS
• Portable Instrumentation
• Closed-Loop Servo-Control/Process Control
• Data Acquisition Systems
• Programmable Attenuation, Digital Gain, and Offset Adjustment
