The DAC8550 is a small, low-power, voltage output, 16-bit digital-to-analog converter (DAC). It is monotonic, provides good linearity, and minimizes undesired code-to-code transient voltages. The DAC8550 uses a versatile, 3-wire serial interface that operates at clock rates of up to 30MHz and is compatible with standard SPI™, QSPI™, Microwire™, and digital signal processor (DSP) interfaces.

The DAC8550 requires an external reference voltage to set its output range. The DAC8550 incorporates a power-on reset circuit that ensures that the DAC output powers up at midscale and remains there until a valid write takes place to the device. The DAC8550 contains a power-down feature, accessed over the serial interface, that reduces the current consumption of the device to 200nA at 5V.

The low-power consumption of this device in normal operation makes it ideal for portable, battery-operated equipment. Power consumption is 0.38mW at 2.7V, reducing to less than 1µW in power-down mode.

The DAC8550 is available in an MSOP-8 package.

For additional flexibilty, see the DAC8551, a binary-coded counterpart to the DAC8550.

• Relative Accuracy: 3LSB
• Glitch Energy: 0.1nV-s
• MicroPower Operation: 140µA at 2.7V
• Power-On Reset to Midscale
• Power Supply: +2.7V to +5.5V
• 16-Bit Monotonic Over Temperature
• Settling Time: 10µs to ±0.003% FSR
• Low-Power Serial Interface with Schmitt-Triggered Inputs
• On-Chip Output Buffer Amplifier with Rail-to-Rail Output Amplifier
• Power-Down Capability
• 2's Complement Input
• SYNC InterruptFacility
• Drop-In Compatible with DAC8531/01 and DAC8551 (Binary Input)
• Available in a Tiny MSOP-8 Package
• APPLICATIONS
  • Process Control
  • Data Acquisition Systems
  • Closed-Loop Servo-Control
  • PC Peripherals
  • Portable Instrumentation
  • Programmable Attenuation

SPI, QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor. All other trademarks are the property of their respective owners.