CN-0131: 16 Channels of Programmable Output Span Using the AD5360 16-Bit Voltage Output DAC PDF

Circuit Note
CN-0131
Circuit Designs Using Analog Devices Products
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Devices Connected/Referenced
AD5360
16-Channel, 16-Bit Voltage Output DAC
ADR431/
ADR421
ADR435
2.5 V Ultralow Noise Voltage Reference
5 V Ultralow Noise Voltage Reference
16 Channels of Programmable Output Span Using the AD5360
16-Bit Voltage Output DAC
CIRCUIT FUNCTION AND BENEFITS
AD5360 is four times the reference voltage, with the mid-scale
point at 0 V. The ADR431 and ADR421 are low noise precision
2.5 V references. The ADR435 is a low noise precision 5 V
reference. When connected as shown in Figure 1, the AD5360
will have an output span of ±5 V on VOUT0 to VOUT7 and an
output span of ±10 V on VOUT8 to VOUT15. The AD5360 has
two offset DAC registers, which allow the mid-scale point of the
span to be altered within the limits of part functionality and
headroom.
This circuit is a multichannel DAC configuration with different
output spans on groups of channels. It utilizes the AD5360 to
provide 16 DAC channels with 16 bits of resolution. The
AD5360 is configured to have eight channels with an output
span of ±10 V and eight channels with an output span of ±5 V.
CIRCUIT DESCRIPTION
The AD5360 is a 16-channel, 16-bit DAC available both in
56-lead LFCSP and 52-lead LQFP packages. The AD5360 has
two reference input pins. VREF0 is the reference pin for DAC
channels VOUT0 to VOUT7. VREF1 is the reference pin for
DAC channels VOUT8 to VOUT15.
The circuit must be constructed on a multilayer PC board with
a large area ground plane. Proper layout, grounding, and
decoupling techniques must be used to achieve optimum
performance (see Tutorial MT-031 and Tutorial MT-101).
Figure 1 shows a typical configuration for the AD5360 using
two external references. The nominal output span for the
15V
5V
0.1µF
10µF
ADR431/
ADR421
0.1µF
2.5V
VDD
DVCC
VREF0
VOUT0
0.1µF
±5V
VOUT7
5V
AD5360
ADR435
VOUT8
±10V
VREF1
VOUT15
0.1µF
VSS
SIGGND
AGND DGND
0.1µF
–15V
08609-001
10µF
Figure 1. 16 Channels of Programmable Output Voltage Span Using the AD5360 DAC (Simplified Schematic: Decoupling and All Connections Not Shown)
Rev. 0
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CN-0131
Circuit Note
COMMON VARIATIONS
Data Sheets and Evaluation Boards
The AD5362 is an 8-channel version of the AD5360. The
AD5361 and AD5363 are 14-bit versions of the AD5360 and
AD5362, respectively.
AD5360 Data Sheet
AD5360 Evaluation Board
The circuit described here can be used with any of the AD536x
devices mentioned above. The references can also be changed to
give different output ranges if required.
LEARN MORE
Kester, Walt. The Data Conversion Handbook. Chapter 3, 7.
Analog Devices. 2005.
MT-015 Tutorial, Basic DAC Architectures II: Binary DACs.
Analog Devices.
MT-031 Tutorial, Grounding Data Converters and Solving the
Mystery of AGND and DGND. Analog Devices.
AD5361 Data Sheet
AD5362 Data Sheet
AD5363 Data Sheet
ADR421 Data Sheet
ADR431 Data Sheet
ADR435 Data Sheet
REVISION HISTORY
10/09—Revision 0: Initial Version
MT-101 Tutorial, Decoupling Techniques. Analog Devices.
Voltage Reference Wizard Design Tool. Analog Devices.
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©2009 Analog Devices, Inc. All rights reserved. Trademarks and
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CN08609-0-10/09(0)
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