2.7 V to 5.5 V, Serial-Input,
Voltage-Output, 14-Bit DACs
AD5551/AD5552
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
V
DD
Full 14-bit performance
8
3 V and 5 V single supply operation
Low 0.625 mW power dissipation
1 μs settling time
Unbuffered voltage output capable of driving 60 kΩ
loads directly
SPI/QSPI/MICROWIRE-compatible interface standards
Power-on reset clears DAC output to 0 V (unipolar mode)
5 kV HBM ESD classification
AD5551
3
1
2
V
14-BIT DAC
V
OUT
REF
CS
AGND
4
6
14-BIT DATA LATCH
DIN
CONTROL
LOGIC
5
SERIAL INPUT REGISITER
SCLK
7
DGND
APPLICATIONS
Figure 1.
Digital gain and offset adjustment
Automatic test equipment
Data acquisition systems
V
DD
14
R
FB
AD5552
1
RFB
Industrial process control
R
INV
13 INV
6
V
REFF
GENERAL DESCRIPTION
2
3
V
OUT
14-BIT DAC
The AD5551/AD5552 are single, 14-bit, serial-input, voltage-
output DACs that operate from a single 2.7 V to 5.5 V supply.
The DAC output range extends from 0 V to VREF
5
7
V
AGNDF
REFS
14-BIT DATA LATCH
CS
.
LDAC 11
CONTROL
LOGIC
4
AGNDS
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.
SCLK
DIN
8
10
SERIAL INPUT REGISITER
12
DGND
With an external op amp, the AD5552 can be operated in
Figure 2.
bipolar 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, refer to 16-bit DACs AD5541, AD5542,
and AD5544.
PRODUCT HIGHLIGHTS
1. Single Supply Operation.
The AD5551 and AD5552 are fully specified and
guaranteed for a single 2.7 V to 5.5 V supply.
2. Low Power Consumption.
Typically 0.625 mW with a 5 V supply.
3. 3-Wire Serial Interface.
4. Unbuffered output capable of driving 60 kΩ loads, which
reduces power consumption as there is no internal buffer
to drive.
The AD5551/AD5552 utilize a versatile 3-wire interface that is
compatible with SPI, QSPI™, MICROWIRE™, and DSP interface
standards. The AD5551 and AD5552 are available in 8-lead and
14-lead SOIC packages.
5. Power-On Reset Circuitry.
Rev. A
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