AD5420AREZ Analog Devices Inc, AD5420AREZ Datasheet - Page 27

• Manufacturer Part Number: AD5420AREZ
• Description: IC DAC 16BIT 1CH SER 24TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD5420AREZ

• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Design Resources: Simplified 16-Bit, 4 mA-to-20 mA Output Solution Using AD5420 (CN0098)
• Settling Time: 10µs
• Number Of Bits: 16
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital
• Power Dissipation (max): 950mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP Exposed Pad, 24-eTSSOP, 24-HTSSOP
• Resolution (bits): 16bit
• Input Channel Type: Serial
• Supply Voltage Range - Digital: 2.7V To 5.5V
• Supply Current: 4mA
• Digital Ic Case Style: TSSOP
• No. Of Pins: 24
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
OUT
INTPUTS
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
NC
V
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
DD2
V
DD1
V
V
OA
OB
OC
OD
E2
IA
IB
2
2
1
and
Rev. B | Page 27 of 28
0.1µF
10kΩ
CLEAR
LATCH
SCLK
SDIN
FAULT
SDO
SELECT
DV
ADuM1200
i Coupler 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
i Coupler digital isolators; further information on
C2
C1
AV
I
0.1µF
OUT
DD
10µF
0.1µF
18Ω
SMAJ36CA
36V
AD5410/AD5420
24V
SMAJ24CA
I
24V
FIELD
SUPPLY
FIELD
GROUND
OUT