1FEATURES
23• Relative Accuracy:
– 1 LSB INL
• Glitch Energy: 0.15nV-s
• Internal Reference:
– 2.5V Reference Voltage (disabled by
default)
– ±5mV Initial Accuracy (max)
– 5ppm/°C Temperature Drift (typ)
– 25ppm/°C Temperature Drift (max)
– 20mA Sink/Source Capability
• Power-On Reset to Zero Scale or Midscale
– Devices in the TSSOP Package Reset to
Zero Scale
– Devices in the QFN Package Reset to Zero
Scale or Midscale
• Ultra-Low Power Operation: 0.13mA/Channel
at 5V (without internal reference current)
• Wide Power-Supply Range: +2.7V to +5.5V
• 2-Wire Serial Interface ( I2C™ compatible)
• 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
• PC Peripherals

DESCRIPTION
The DAC7678 is a low-power, voltage-output, octal
channel, 12-bit digital-to-analog converter (DAC). The
DAC7678 includes a 2.5V internal reference (disabled
by default), giving a full-scale output voltage range of
5V. The internal reference has an initial accuracy of
±5mV and can source up to 20mA at the
VREFIN/VREFOUT pin. The device is monotonic,
provides very good linearity, and minimizes undesired
code-to-code transient voltages (glitch).
The DAC7678 uses a versatile, 2-wire serial interface
that is I2C-compatible and operates at clock rates of
up to 3.4MHz. Multiple devices can share the same
bus.
The DAC7678 incorporates a power-on-reset circuit
that ensures the DAC output powers up to either
zero-scale or mid-scale until a valid code is written to the device. These devices contain a power-down
feature, accessed over the serial interface that
reduces the current consumption of the device to
typically 0.42μA at 5V. Power consumption (including
internal reference) is typically 3.56mW at 3V,
reducing to 0.68μW in power-down mode. The low
power consumption, internal reference, and small
footprint make this device ideal for portable, batteryoperated
equipment. The DAC7678 is drop-in and
functionally compatible with DAC5578, DAC6578,
and DAC7578. All devices are available in a 4x4
QFN-24 package and a TSSOP-16 package.