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Output DAC. AD5726 Datasheet |
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Quad, 12-Bit, Serial Input,
Unipolar/Bipolar, Voltage Output DAC
AD5726
FEATURES
+5 V to ±15 V operation
Unipolar or bipolar operation
±1 LSB maximum INL error, ±1 LSB maximum DNL error
Guaranteed monotonic over temperature
Double-buffered inputs
Simultaneous updating via LDAC
Asynchronous CLR to zero scale/midscale
Operating temperature range: −40°C to +125°C
iCMOS® process technology1
APPLICATIONS
Industrial automation
Closed-loop servo control, process control
Automotive test and measurement
Programmable logic controllers
GENERAL DESCRIPTION
The AD5726 is a quad, 12-bit, serial input, voltage output
digital-to analog converter that offers guaranteed monotonicity
and integral nonlinearity (INL) of ±1 LSB maximum.
www.DataSheet4U.com Output voltage swing is set by two reference inputs, VREFP and
VREFN. The DAC offers a unipolar positive output range when
the VREFN input is set to 0 V and the VREFP input is set to a positive
voltage. A similar configuration with VREFP at 0 V and VREFN at a
negative voltage provides a unipolar negative output range.
Bipolar outputs are configured by connecting both VREFP and
VREFN to nonzero voltages. This method of setting output voltage
ranges has advantages over the bipolar offsetting methods
because it is not dependent on internal and external resistors
with different temperature coefficients.
The AD5726 uses a serial interface that operates at clock rates up to
30 MHz and is compatible with DSP and microcontroller interface
standards. Double buffering allows simultaneous updating of all
DACs. The asynchronous CLR function clears all DAC registers
to a user-selectable, zero-scale or midscale output.
The AD5726 is available in 16-lead SSOP and 16-lead SOIC
packages. It can be operated from a wide variety of supply and
reference voltages with supplies ranging from single +5 V to
±15 V, and references ranging from +2.5 V to ±10 V. Power
dissipation is less than 240 mW with ±15 V supplies and only
30 mW with a +5 V supply. Operation is specified over the
temperature range of −40°C to +125°C.
Table 1. Related Devices
Part No.
Description
AD5725
Quad, 12-bit, parallel input,
unipolar/bipolar, voltage output DAC.
AD5724R/AD5734R/ Complete, quad, 12-/14-/16-bit, serial
AD5754R
input, unipolar/bipolar voltage output
DAC with internal reference.
AD5722R/AD5732R/ Complete, dual, 12-/14-/16-bit, serial
AD5752R
input, unipolar/bipolar voltage output
DAC with internal reference.
FUNCTIONAL BLOCK DIAGRAM
AVSS AVDD
VREFP
SDIN
SCLK
CS
I/O
REGISTER
AND
CONTROL
LOGIC
12
AD5726
INPUT 12 DAC 12
REG A
REG A
DAC A
INPUT 12 DAC 12
REG B
REG B
DAC B
INPUT 12 DAC 12
REG C
REG C
DAC C
INPUT 12 DAC 12
REG D
REG D
DAC D
VOUTA
VOUTB
VOUTC
VOUTD
GND
CLR CLRSEL LDAC
Figure 1.
VREFN
1 For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher-voltage levels, iCMOS is a technology
platform that enables the development of analog ICs capable of 30 V and operating at ±15 V supplies while allowing dramatic reductions in power consumption and
package size, and increased ac and dc performance.
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.
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AD5726
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AC Performance Characteristics ................................................ 5
Timing Characteristics ................................................................ 6
Absolute Maximum Ratings............................................................ 7
Thermal Resistance ...................................................................... 7
ESD Caution.................................................................................. 7
Pin Configuration and Function Descriptions............................. 8
Typical Performance Characteristics ............................................. 9
Terminology .................................................................................... 12
REVISION HISTORY
4/07—Revision 0: Initial Version
www.DataSheet4U.com
Theory of Operation ...................................................................... 13
DAC Architecture....................................................................... 13
Output Amplifiers ...................................................................... 13
Reference Inputs ......................................................................... 13
Serial Interface ............................................................................ 14
Applications..................................................................................... 15
Power-Up Sequence ................................................................... 15
Reference Configuration ........................................................... 15
Power Supply Bypassing and Grounding................................ 16
Galvanically Isolated Interface ................................................. 16
Microprocessor Interfacing....................................................... 17
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 18
Rev. 0 | Page 2 of 20
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