Quad, 12-Bit, Serial Input,
Unipolar/Bipolar, Voltage Output DAC
AD5726
Data Sheet
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.
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
Asynchronous CLR to zero scale/midscale
Operating temperature range: −40°C to +125°C
iCMOS process technology
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. The asynchronous CLR function clears all DAC
registers to a user-selectable zero-scale or midscale output.
APPLICATIONS
Industrial automation
Closed-loop servo control, process control
Automotive test and measurement
Programmable logic controllers
The AD5726 is available in 16-lead SSOP, 20-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.
GENERAL DESCRIPTION
The AD5726 is a quad, 12-bit, serial input, voltage output
digital-to-analog converter (DAC) fabricated on Analog
Devices, Inc., iCMOS® process technology1 that offers
guaranteed monotonicity and integral nonlinearity (INL)
of ±1 LSB maximum.
A similar device, also available from Analog Devices is
the AD5725, which is a quad, 12-bit, parallel input, unipolar/
bipolar, voltage output DAC.
Output voltage swing is set by two reference inputs, VREFP and
VREFN. The DAC offers a unipolar positive output range when
FUNCTIONAL BLOCK DIAGRAM
VREFP
AVDD
12
SCLK
CS
I/O
REGISTER
AND
CONTROL
LOGIC
AD5726
GND
INPUT 12
REG A
DAC 12
REG A
DAC A
VOUTA
INPUT 12
REG B
DAC 12
REG B
DAC B
VOUTB
INPUT 12
REG C
SDIN
DAC 12
REG C
DAC C
VOUTC
INPUT 12
REG D
DAC 12
REG D
DAC D
VOUTD
CLR CLRSEL LDAC
VREFN
06469-001
AVSS
Figure 1.
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. C
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