a
FEATURES
Full 14-Bit Performance
5 V Single Supply Operation
Low Power
Fast Settling Time
Unbuffered Voltage Output Capable of Driving 60 k
Loads Directly
SPI鈩?QSPI鈩?MICROWIRE鈩?Compatible Interface
Standards
Power-On Reset Clears DAC Output to 0 V (Unipolar
Mode)
Schmitt Trigger Inputs for Direct Optocoupler Interface
APPLICATIONS
Digital Gain and Offset Adjustment
Automatic Test Equipment
Data Acquisition Systems
Industrial Process Control
5 V, Serial-Input
Voltage-Output, 14-Bit DACs
AD5551/AD5552
FUNCTIONAL BLOCK DIAGRAMS
V
DD
AD5551
V
REF
14-BIT DAC
V
OUT
AGND
CS
DIN
SCLK
CONTROL
LOGIC
SERIAL INPUT REGISTER
14-BIT DATA LATCH
DGND
V
DD
AD5552
R
INV
V
REFF
14-BIT DAC
R
FB
RFB
INV
V
OUT
AGNDF
GENERAL DESCRIPTION
V
REFS
CS
LDAC
SCLK
DIN
CONTROL
LOGIC
SERIAL INPUT REGISTER
The AD5551 and AD5552 are single, 14-bit, serial input, voltage
output DACs that operate from a single 5 V
鹵
10% supply.
The AD5551 and AD5552 utilize a versatile 3-wire interface that
is compatible with SPI, QSPI, MICROWIRE, and DSP inter-
face standards.
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.
With an external op amp the AD5552 can be operated in bipo-
lar mode generating a
鹵
V
REF
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.
The AD5551 and AD5552 are available in an SO package.
14-BIT DATA LATCH
AGNDS
DGND
PRODUCT HIGHLIGHTS
1. Single Supply Operation.
The AD5551 and AD5552 are fully speci鏗乪d and guaranteed
for a single 5 V
鹵
10% supply.
2. Low Power Consumption.
Typically 1.5 mW with a 5 V supply.
3. 3-Wire Serial Interface.
4. Unbuffered output capable of driving 60 k鈩?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
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
漏 Analog Devices, Inc., 2000
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