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,
battery-operated 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.
