AD5410 Analog Devices, AD5410 Datasheet - Page 27

• Manufacturer Part Number: AD5410
• Description: Single-Channel, 12-/16-Bit, Serial Input, 4 mA to 20 mA, Current Source DAC
• Manufacturer: Analog Devices

Specifications of AD5410

• Resolution (bits): 12bit
• Max Pos Supply (v): +26.4V
• Dac Input Format: SPI

INDUSTRIAL ANALOG OUTPUT APPLICATION
Many industrial control applications have requirements for
accurately controlled current output signals, and the AD5410/
AD5420 are ideal for such applications. Figure 53 shows the
AD5410/AD5420 in a circuit design for an output module
specifically for use in an industrial control application. The
design provides for a current output. The module is powered
from a field supply of 24 V. This supplies AV
transient overvoltage protection, transient voltage suppressors
(TVS) are placed on both the I
A 24 V TVS is placed on the I
placed on the field supply input. For added protection, clamping
diodes are connected from the I
power supply pins. Isolation between the AD5410/AD5420 and
the backplane circuitry is provided with the
BACKPLANE SUPPLY
MICROCONTROLLER
OUTPUTS
INTPUTS
OUT
DIGITAL
DIGITAL
OUT
OUT
0.1µF
connection, and a 36 V TVS is
pin to the AV
and field supply connections.
Figure 53. AD5410/AD5420 in an Industrial Analog Output Application
ADuM1400
DD
V
NC
V
V
V
V
GND
GND
V
V
V
GND
ADUM1200
ADuM1400
DD1
IA
IB
IC
ID
DD2
OA
OB
directly. For
DD
1
1
2
and GND
GND
GND
GND
V
V
V
V
V
V
V
DD1
DD2
V
V
OA
OB
OC
OD
E2
IA
IB
2
2
1
and
Rev. C | Page 27 of 28
0.1µF
10kΩ
CLEAR
SCLK
FAULT
LATCH
SDIN
SDO
SELECT
DV
ADuM1200
iCoupler products is available at www.analog.com/icouplers.
The internally generated digital power supply of the AD5410/
AD5420 powers the field side of the digital isolators, removing
the need to generate a digital power supply on the field side of
the isolation barrier. The AD5410/AD5420 digital supply out-
put supplies up to 5 mA, which is more than enough to supply
the 2.8 mA requirement of the ADuM1400 and ADuM1200
operating at a logic signal frequency of up to 1 MHz. To reduce
the number of isolators required, nonessential signals such as
CLEAR can be connected to GND and FAULT , and SDO can be
left unconnected, reducing the isolation requirements to just
three signals. Doing so, however, disables the fault alert features
of the part.
CC
GND
AD5410/AD5420
DV
CC
CAP1 CAP2
REFOUT REFIN
iCoupler digital isolators; further information on
C2
C1
AV
I
0.1µF
OUT
DD
0.1µF
10µF
18Ω
SMAJ36CA
36V
AD5410/AD5420
24V
SMAJ24CA
I
24V
FIELD
SUPPLY
FIELD
GROUND
OUT