Datasheet
Table Of Contents
- Features
- Applications
- General Description
- Companion Products
- Table of Contents
- Functional Block Diagram
- Specifications
- Absolute Maximum Ratings
- Pin Configurations and Function Descriptions
- Typical Performance Characteristics
- Terminology
- Theory of Operation
- AD5412/AD5422 Features
- Fault Alert
- Voltage Output Short Circuit Protection
- Voltage Output Overrange
- Voltage Output Force-Sense
- Asynchronous Clear (CLEAR)
- Internal Reference
- External Current Setting Resistor
- Digital Power Supply
- External Boost Function
- External Compensation Capacitor
- HART Communication
- Digital Slew Rate Control
- IOUT Filtering Capacitors (LFCSP Package)
- Applications Information
- Outline Dimensions
AD5412/AD5422 Data Sheet
Rev. I | Page 40 of 44
I
OUT
LATCH
SCLK
SDIN
SDO
GND
CLEAR
FAULT
REFOUT
0.1µF
10µF
2.7V
TO
5.5V
DGND
TXD
RXD
RTS
CD
V
CC
ADC_IP
REF
1µF
10kΩ
1.2MΩ
1.2MΩ
300pF
150kΩ
C3
R
SET
DV
CC
AV
DD
CAP2
CAP1
R
L
500Ω
AGND
0.1µF
10µF
150pF
V
OUT
+V
SENSE
–V
SENSE
OP1177
10µF
0.1µF
0.1µF
0.1µF
AV
SS
10kΩ
R
P
R
P
C2
22nF
C1
2.2nF
D1
D2
D3
D4
AV
SS
DIGITAL
INTERFACE
UART
INTERFACE
AD5412/
AD5422
REFIN
0V
TO
–26.4V
10.8V
TO
26.4V
AV
DD
HART_OUT
AD5700
4mA TO 20mA
CURRENTLOOP
06996-079
Figure 82. AD5412/AD5422 in HART Configuration
LATCH
SCLK
SDIN
SDO
DV
CC
AV
SS
AV
DD
+V
SENSE
–V
SENSE
I
OUT
V
OUT
+V
SENSE
–V
SENSE
I
OUT
+V
OUT
C
COMP
GND
CLEAR
FAULT
REFOUT
REFIN
CLEAR SELECT
DV
CC
SELECT
AD5412/
AD5422
1
24V
SMAJ24CA
4nF
24V FIELD SUPPLY
36V
10µF
0.1µF
0.1µF
10µF
0.1µF
–15V
INVERTING
BUCK
REGULATOR
–15V
V
DD2
V
DD2
GND
1
GND
1
V
IA
V
IA
NC
GND
1
V
IC
V
ID
V
IB
V
IB
V
OA
V
OA
V
OC
V
OD
V
OB
V
OB
GND
2
V
E2
GND
2
GND
2
ADuM1400
10kΩ
FIELD GROUND
ADuM1200
V
DD1
V
DD1
MICROCONTROLLER
DIGITAL
OUTPUTS
DIGITAL
INPUTS
0.1µF
0.1µF
BACKPLANE INTERFACE
BACKPLANE
SUPPLY
SMAJ36CA
4.7kΩ
18Ω
100Ω
+
+
06996-068
1
ADDITIONAL PINS OMITTED FOR CLARITY.
Figure 83. AD5412/AD5422 in an Industrial Analog Output Module Application