DAC7564

• Relative Accuracy: 0.5LSB
• Glitch Energy: 0.15nV-s
• Internal Reference:
  • 2.5V Reference Voltage (enabled 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
• Ultra-Low Power Operation: 1mA at 5V
• Wide Power-Supply Range: +2.7V to +5.5V
• 12-Bit Monotonic Over Temperature Range
• Settling Time: 10µs to ±0.024% Full-Scale Range (FSR)
• Low-Power Serial Interface with Schmitt-Triggered Inputs: Up to 50MHz
• On-Chip Output Buffer Amplifier with Rail-to-Rail Operation
• 1.8V to 5.5V Logic Compatibility
• Temperature Range: –40°C to +105°C
• APPLICATIONS
  • Portable Instrumentation
  • Closed-Loop Servo-Control
  • Process Control, PLCs
  • Data Acquisition Systems
  • Programmable Attenuation
  • PC Peripherals

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The DAC7564 is a low-power, voltage-output, four-channel, 12-bit digital-to-analog converter (DAC). The device includes a 2.5V, 2ppm/°C internal reference (enabled by default), giving a full-scale output voltage range of 2.5V. The internal reference has an initial accuracy of 0.02% and can source up to 20mA at the V_REFH/V_REFOUT pin. The device is monotonic, provides very good linearity, and minimizes undesired code-to-code transient voltages (glitch). The DAC7564 uses 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 DAC7564 incorporates a power-on-reset circuit that ensures the DAC output powers up at zero-scale and remains there until a valid code is written to the device. The device contains a power-down feature, accessed over the serial interface, that reduces the current consumption of the device to 1.3µA at 5V. Power consumption is 2.9mW at 3V, reducing to 1.5µW in power-down mode. The low power consumption, internal reference, and small footprint make this device ideal for portable, battery-operated equipment.

The DAC7564 is drop-in and functionally compatible with the DAC8164 and DAC8564, and functionally compatible with the DAC7565, DAC8165 and DAC8565. All these devices are available in a TSSOP-16 package.