●DESCRIPTION
●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
●• Programmable Voltage and Current Sources
