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AD5531 Datasheet

Serial Input/ Voltage Output 12-/14-Bit DACs

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FEATURES
Pin-Compatible 12- and 14-Bit DACs
Serial Input, Voltage Output
Maximum Output Voltage Range of ؎10 V
Data Readback
3-Wire Serial Interface
Clear Function to a User-Defined Voltage
Power-Down Function
Serial Data Output for Daisy-Chaining
16-Lead TSSOP Packages
APPLICATIONS
Industrial Automation
Automatic Test Equipment
Process Control
General-Purpose Instrumentation
Serial Input, Voltage Output
12-/14-Bit DACs
AD5530/AD5531
GENERAL DESCRIPTION
The AD5530 and AD5531 are single 12-/14-bit serial input,
voltage output DACs, respectively.
They utilize a versatile 3-wire interface that is compatible with
SPI, QSPI, MICROWIRE, and DSP interface standards.
Data is presented to the part in the format of a 16-bit serial word.
Serial data is available on the SDO pin for daisy-chaining pur-
poses. Data readback allows the user to read the contents of the
DAC register via the SDO pin.
The DAC output is buffered by a gain of 2 amplifier and refer-
enced to the potential at DUTGND. LDAC may be used to update
the output of the DAC asynchronously. A power-down (PD) pin
allows the DAC to be put into a low power state, and a CLR pin
allows the output to be cleared to a user-defined voltage, the
potential at DUTGND.
The AD5530 and AD5531 are available in 16-lead TSSOP
packages.
REFIN
REFAGND
LDAC
RBEN
SDIN
FUNCTIONAL BLOCK DIAGRAM
VSS VDD
R –R
+
12-/14-BIT DAC
AD5530/AD5531
+
VOUT
R
DAC REGISTER
SHIFT REGISTER
POWER-DOWN
CONTROL LOGIC
R
DUTGND
CLR
PD
GND
SCLK SYNC
SDO
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 that
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
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
Analog Devices
Analog Devices


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