1FEATURES
234• Relative Accuracy: 4LSB
• 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 or Midscale
• Asynchronous Clear to Zero-Scale or Midscale
• Ultra-Low Power Operation: 1mA at 5V
• Wide Power Supply Range: +2.7V to +5.5V
• 16-Bit Monotonic Over Temperature Range
• Settling Time: 10μs to ±0.003% 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

DESCRIPTION
The DAC8565 is a low-power, voltage-output,
four-channel, 16-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 0.004% and can source up to 20mA at the VREFH/VREFOUT pin. The device is
monotonic, provides very good linearity, and
minimizes undesired code-to-code transient voltages
(glitch). The DAC8565 use a versatile 3-wire serial
interface that operates at clock rates up to 50MHz. It
is compatible with standard SPI™, QSPI™,
Microwire™, and digital signal processor (DSP)
interfaces.
The DAC8565 incorporates a power-on-reset circuit
that ensures the DAC output powers up at either
zero-scale or midscale 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. The low power consumption, internal
reference, and small footprint make this device ideal
for portable, battery-operated equipment. The power
consumption is 2.9mW at 3V, reducing to 1.5μW in
power-down mode.
The DAC8565 is drop-in and functionally compatible
with the DAC7564 and DAC8164, and functionally
compatible with the DAC7565, DAC8165, and
DAC8564. All these devices are available in a
TSSOP-16 package.