1 Features
1• 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
• Ultralow 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

2 Applications
• Portable Instrumentation
• Closed-Loop Servo-Control/Process Control
• Data Acquisition Systems
• Programmable Attenuation, Digital Gain, and
Offset Adjustment
• Programmable Voltage and Current Sources

3 Description
The DAC7568, DAC8168, and DAC8568 are lowpower,
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 fullscale
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.
The DAC7568, DAC8168, and DAC8568 incorporate
a power-on-reset circuit that ensures the DAC output
powers up at either zero scale or midscale until a
valid code is written to the device. These devices
contain a power-down feature, accessed over the
serial interface, that reduces current consumption to
typically 0.18μA at 5V. Power consumption (including
internal reference) is typically 2.9mW at 3V, reducing
to less than 1μW in power-down mode. The low
power consumption, internal reference, and small
footprint make these devices ideal for portable,
battery-operated equipment.
The DAC7568, DAC8168, and DAC8568 are drop-in
and function-compatible with each other, and are
available in TSSOP-16 and TSSOP-14 packages.