5 V, Serial-Input
Voltage-Output, 14-Bit DACs
a
AD5551/AD5552
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Full 14-Bit Performance
5 V Single Supply Operation
Low Power
V
DD
AD5551
Fast Settling Time
V
14-BIT DAC
Unbuffered Voltage Output Capable of Driving 60 k⍀
Loads Directly
V
REF
OUT
SPI™/QSPI™/MICROWIRE™-Compatible Interface
Standards
AGND
14-BIT DATA LATCH
CS
Power-On Reset Clears DAC Output to 0 V (Unipolar
Mode)
Schmitt Trigger Inputs for Direct Optocoupler Interface
DIN
CONTROL
LOGIC
SCLK
SERIAL INPUT REGISTER
DGND
APPLICATIONS
Digital Gain and Offset Adjustment
Automatic Test Equipment
Data Acquisition Systems
Industrial Process Control
V
DD
R
FB
AD5552
RFB
INV
R
INV
V
REFF
14-BIT DAC
V
OUT
V
REFS
GENERAL DESCRIPTION
The AD5551 and AD5552 are single, 14-bit, serial input, voltage
output DACs that operate from a single 5 V 10% supply.
AGNDF
AGNDS
CS
14-BIT DATA LATCH
LDAC
CONTROL
LOGIC
SCLK
The AD5551 and AD5552 utilize a versatile 3-wire interface that
is compatible with SPI, QSPI, MICROWIRE, and DSP inter-
face standards.
SERIAL INPUT REGISTER
DGND
DIN
These DACs provide 14-bit performance without any adjust-
ments. The DAC output is unbuffered, which reduces power
consumption and offset errors contributed by an output buffer.
PRODUCT HIGHLIGHTS
1. Single Supply Operation.
With an external op amp the AD5552 can be operated in bipo-
The AD5551 and AD5552 are fully specified and guaranteed
for a single 5 V 10% supply.
lar mode generating a
VREF output swing. The AD5552 also
includes Kelvin sense connections for the reference and analog
ground pins to reduce layout sensitivity. For higher precision
applications, please refer to 16-bit DACs AD5541, AD5542,
and AD5544.
2. Low Power Consumption.
Typically 1.5 mW with a 5 V supply.
3. 3-Wire Serial Interface.
The AD5551 and AD5552 are available in an SO package.
4. Unbuffered output capable of driving 60 kΩ loads, which
reduces power consumption as there is no internal buffer
to drive.
5. Power-On Reset Circuitry.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corporation.
REV. 0
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which may result from its use. No license is granted by implication or
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