DAC8168ICPW

The DAC7568, DAC8168, and DAC8568 are 12-bit, 14-bit, and 16-bit low-power, voltage-output, eight-channel digital-to-analog converters (DACs), respectively. These devices include a 2.5V, 2ppm/°C internal reference voltage (disabled by default), which can provide a full-scale output voltage range of 2.5V or 5V. The initial accuracy of the internal reference voltage is 0.004%, and it can supply a current of up to 20mA at the VREFIN/VREFOUT pins. These devices are monotonic, offering excellent linearity and reducing harmful transient voltages (glitch pulses) during code-to-code transitions. They use a versatile 3-wire serial interface operating at a clock rate of up to 50MHz. This interface is compatible with standard SPI, QSPI, Microwire, and digital signal processor (DSP) interfaces. The DAC7568, DAC8168, and DAC8568 include a power-on reset circuit, which ensures that the DAC output powers up at zero level or mid-level and remains in this state until a valid code is written to the device. These devices feature a power-down characteristic accessible via the serial interface, which reduces the supply current of the device to 0.18μA (typical) at 5V. The power consumption (including the internal reference) at 3V is typically 2.9mW and can be reduced to less than 1μW in power-down mode. The low power consumption, internal reference voltage, and small package size make these devices well-suited for portable, battery-powered equipment. The DAC7568, DAC8168, and DAC8568 are functionally compatible and direct replacement products, available in TSSOP - 16 and TSSOP - 14 packages.

Applications

• Portable instrumentation
• Closed-loop servo control/process control
• Data acquisition systems
• Programmable attenuation, digital gain, and offset voltage adjustment
• Programmable voltage and current sources

Key features

• Relative Accuracy:
• DAC7568 (12-bit): 0.3 LSB INL
• DAC8168 (14-bit): 1 LSB INL
• DAC8568 (16-bit): 4 LSB INL
• Glitch Impulse Energy: 0.1nV-s
• Internal Reference Voltage:
• 2.5V reference (disabled by default)
• 0.004% initial accuracy (typical)
• 2ppm/°C temperature drift (typical)
• 5ppm/°C temperature drift (maximum)
• 20mA sink/source current capability
• Power-on reset to zero-scale or midscale
• Ultra-low power operation: 1.25mA/5V (including internal reference current)
• Wide supply range: +2.7V to +5.5V
• Monotonic over the entire temperature range
• Low-power serial interface with Schmitt-trigger inputs: up to 50MHz
• On-chip output buffer amplifier supporting rail-to-rail operation
• Temperature range: -40°C to +125°C