The DAC8555 is a 16-bit, quad channel, voltage output digital-to-analog converter (DAC) offering low-power operation and a flexible serial host interface. It offers monotonicity, good linearity, and exceptionally low glitch. Each on-chip precision output amplifier allows rail-to-rail output swing to be achieved over the supply range of 2.7V to 5.5V. The device supports a standard 3-wire serial interface capable of operating with input data clock frequencies up to 50MHz for IOVDD = 5V.
The DAC8555 requires an external reference voltage to set the output range of each DAC channel. Also incorporated into the device is a power-on reset circuit, which can be programmed to ensure that the DAC outputs power up at zero-scale or midscale and remain there until a valid write takes place. The device also has the capability to function in both binary and 2"s complement mode. The DAC8555 provides a per channel power-down feature, accessed over the serial interface, that reduces the current consumption to 175nA per channel at 5V.
The low-power consumption of this device in normal operation makes it ideally suited to portable battery- operated equipment and other low-power applications. The power consumption is 5mW at 5V, reducing to 4µW in power-down mode.
The DAC8555 is available in a TSSOP-16 package with a specified operating temperature range of -40°C to +105°C.
Relative Accuracy: 4LSB
Glitch Energy: 0.15nV-s
_Micro_Power Operation: 150µA per Channel at 2.7V
Power-On Reset to Zero-Scale or Midscale
Power Supply: +2.7V to +5.5V
16-Bit Monotonic OverTemperature
Settling Time: 10µs to ±0.003% FSR
Ultra-Low AC Crosstalk: -100dB Typ
Low-Power SPI-Compatible Serial Interface with Schmitt-Triggered Inputs: Up to 50MHz
On-Chip Output Buffer Amplifier with Rail-to-Rail Operation
Double Buffered Input Architecture
Simultaneous or Sequential Output Update and Power-Down
Binary and 2"s Complement Capability
Asynchronous Clear to Zero-Scale and Midscale
1.8V to 5.5V Logic Compatibility
Available in a TSSOP-16 Package
APPLICATIONS
Portable Instrumentation
Closed-Loop Servo-Control
Process Control
Data Acquisition Systems
Programmable Attenuation
PC Peripherals
SPI, QSPI are trademarks of Motorola, Inc.
Microwire is a trademark of National Semiconductor.
All other trademarks are the property of their respective owners.
