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AD5360BSTZ-REEL 其他数据使用手册 - ADI（亚德诺）
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AD5360BSTZ-REEL数据手册
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Circuit Note
CN-0123
Circuit Designs Using Analog Devices Products
Apply these product pairings quickly and with confidence.
For more information and/or support call 1-800-AnalogD
(1-800-262-5643) or visit www.analog.com/circuit.
Devices Connected/Referenced
AD5360 16-Channel, 16-Bit Voltage-Output DAC
AD790 High Speed Precision Comparator
AD8597 Low Noise Amplifier
ADR435 5 V Ultralow Noise Voltage Reference
Automated Calibration Technique That Reduces the AD5360 16-Channel, 16-Bit DAC
Offset Voltage to Less Than 1 mV
Rev.0
“Circuits from the Lab” from Analog Devices have been designed and built by Analog Devices
engineers. Standard engineering practices have been employed in the design and construction of
each circuit, and their function and performance have been tested and verified in a lab environment
at room temperature. However, you are solely responsible for testing the circuit and determining its
suitability and applicability for your use and application. Accordingly, in no event shall Analog
Devices be liable for direct, indirect, special, incidental, consequential or punitive damages due to
any cause whatsoever connected to the use of any “Circuit from the Lab”. (Continued on last page)
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 ©2009 Analog Devices, Inc. All rights reserved.
CIRCUIT FUNCTION AND BENEFITS
The circuit described in this document and shown in Figure 1
provides a method of calibrating that removes an unknown
offset error. When using high precision, high resolution DACs
in industrial process control and instrumentation applications,
low offset is often a critical specification. The circuit uses built-
in features of the AD5360 in conjunction with an external
comparator and an operational amplifier to determine if the
DAC output voltages are above or below a ground reference
signal. With the amount of offset known, the user can adjust the
codes sent to the DAC to null out the offset.
CIRCUIT DESCRIPTION
The AD5360 is a 16 channel, 16-bit digital to analog converter.
The nominal output range is ±10 V when used with a 5 V
reference. The AD5360 contains two offset DACs. Each offset
DAC is connected to a group of eight DACs and is used to
adjust the mid-scale point of the output span. For example, the
offset DAC can be programmed to change the output span from
±10 V to −8 V to +12 V, or other values as required by the
application.
08521-001
VOUT0
DAC 0
REGISTER
DAC 0
VOUT1
DAC 1
REGISTER
DAC 1
VOUT14
DAC 14
REGISTER
DAC 14
VOUT15
DAC 15
REGISTER
INPUT
AND
SPECIAL
FUNCTION
REGISTERS
GPIO
DAC 15
+15V
V
DD
–15V
V
SS
+5V
DV
CC
MUX
MON_OUT
VREF0 VREF1
ADR435
+15V
+5V
DGND
AGNDGPIO
LATCH
AD8597
+15V
–15V
AD790
+15V
+5V
+5V
–15V
V
LOGIC
+V
S
–V
S
1kΩ
100nF
510Ω
SERIAL
INTERFACE
AD5360
Figure 1. Autocalibration Circuit for AD5360 DAC That Reduces the Offset Voltage to Less Than 1 mV
(Simplified Schematic: Decoupling and All Connections Not Shown).
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