DAC8550_15 Datasheet, PDF (1/28 Pages) Texas Instruments – 16-BIT, ULTRA-LOW GLITCH, VOLTAGE OUTPUT DIGITAL-TO-ANALOG CONVERTER

DAC8550
DAC8550
www.ti.com
SLAS476E – MARCH 2006 – REVISED MARCH 2012
16-BIT, ULTRA-LOW GLITCH, VOLTAGE OUTPUT
DIGITAL-TO-ANALOG CONVERTER
Check for Samples: DAC8550
FEATURES
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•234 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 Interrupt Facility
• 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
DESCRIPTION
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.
FUNCTIONAL BLOCK DIAGRAM
V_DD
V_FB
V_REF
REF (+)
16-Bit DAC
V_OUT
SYNC
SCLK
D_IN
16
DAC Register
16
Shift Register
PWB
Control
Resistor
Network
GND
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SPI, QSPI are trademarks of Motorola, Inc.
2
Microwire is a trademark of National Semiconductor.
3
All other trademarks are the property of their respective owners.
4
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2012, Texas Instruments Incorporated