Single-Channel, 16-Bit Current and Voltage Output
DAC with Dynamic Power Control and
HART Connectivit
y
Data Sheet
FEATURES
16-bit resolution and monotonicity
DPC for thermal management
Current/voltage output available on a single terminal
Current output ranges: 0 mA to 20 mA, 4 mA to 20 mA,
0 mA to 24 mA, ±20 mA, ±24 mA, −1 mA to +22 mA
Voltage output ranges (with 20% overrange): 0 V to 5 V,
0 V to 10 V, ±5 V, and ±10 V
User-programmable offset and gain
Advanced on-chip diagnostics, including a 12-bit ADC
On-chip reference
Robust architecture, including output fault protection
−40°C to +115°C temperature range
32-lead, 5 mm × 5 mm LFCSP package
AD5758
GENERAL DESCRIPTION
The AD5758 is a single-channel, voltage and current output digital-
to-analog converter (DAC) that operates with a power supply range
from −33 V (minimum) on AV
SS
to +33 V (maximum) on AV
DD1
with a maximum operating voltage between the two rails of 60 V.
On-chip dynamic power control (DPC) minimizes package power
dissipation, which is achieved by regulating the supply voltage
(V
DPC+
) to the VI
OUT
output driver circuitry from 5 V to 27 V using
a buck dc-to-dc converter, optimized for minimum on-chip power
dissipation. The C
HART
pin enables a HART® signal to be coupled
onto the current output.
The device uses a versatile 4-wire serial peripheral interface
(SPI) that operates at clock rates of up to 50 MHz and is
compatible with standard SPI, QSPI™, MICROWIRE™, DSP, and
microcontroller interface standards. The interface also features an
optional SPI cyclic redundancy check (CRC) and a watchdog
timer (WDT). The AD5758 offers improved diagnostic features
from its predecessors, such as output current monitoring and an
integrated 12-bit diagnostic analog-to-digital converter (ADC).
Additional robustness is provided by the inclusion of a fault
protection switch on the VI
OUT
, +V
SENSE
, and −V
SENSE
pins.
APPLICATIONS
Process control
Actuator control
Channel isolated analog outputs
Programmable logic controller (PLC) and distributed control
systems (DCS) applications
HART network connectivity
PRODUCT HIGHLIGHTS
1.
2.
Range of diagnostic features, including integrated ADC.
DPC, using an integrated buck dc-to-dc converter for
thermal management, enabling higher channel count in
smaller size module housing.
Programmable power control (PPC) mode to enable faster
settling time (15 μs typical).
16-bit performance.
HART compliant.
3.
4.
5.
COMPANION PRODUCTS
Product Family:
AD5755-1, AD5422
HART Modem:
AD5700, AD5700-1
External References:
ADR431, ADR3425, ADR4525
Digital Isolators:
ADuM142D, ADuM141D
Power: LT8300,
ADP2360, ADM6339
Rev. 0
Document Feedback
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Tel: 781.329.4700
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Technical Support
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Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
AD5758
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Companion Products ....................................................................... 1
Revision History ............................................................................... 2
Functional Block Diagram .............................................................. 3
Specifications..................................................................................... 4
AC Performance Characteristics .............................................. 10
Timing Characteristics .............................................................. 11
Absolute Maximum Ratings.......................................................... 14
Thermal Resistance .................................................................... 14
ESD Caution ................................................................................ 14
Pin Configuration and Function Descriptions ........................... 15
Typical Performance Characteristics ........................................... 17
Voltage Output ............................................................................ 17
Current Outputs ......................................................................... 21
DC-to-DC Block......................................................................... 26
Reference ..................................................................................... 27
General ......................................................................................... 28
Terminology .................................................................................... 29
Theory of Operation ...................................................................... 31
DAC Architecture ....................................................................... 31
Serial Interface ............................................................................ 31
Power-On State of the AD5758 ................................................ 32
Power Supply Considerations ................................................... 32
Device Features and Diagnostics .................................................. 34
Power Dissipation Control ........................................................ 34
Interdie 3-Wire Interface ........................................................... 35
Data Sheet
Voltage Output ............................................................................ 36
Fault Protection Switches .......................................................... 36
Current Output ........................................................................... 36
Internal Current Output Monitor ............................................ 37
HART Connectivity ................................................................... 37
Digital Slew Rate Control .......................................................... 37
Device Under Test (DUT) Address Pins ................................. 38
Watchdog Timer (WDT)........................................................... 39
User Digital Offset and Gain Control...................................... 39
DAC Output Update and Data Integrity Diagnostics ........... 40
Use of Key Codes ........................................................................ 41
Software Reset ............................................................................. 41
Calibration Memory CRC ......................................................... 41
Internal Oscillator Diagnostics ................................................. 42
Sticky Diagnostic Results Bits ................................................... 42
Background Supply and Temperature Monitoring ................ 42
Output Fault ................................................................................ 42
ADC Monitoring ........................................................................ 43
Register Map ................................................................................... 48
Writing to Registers ................................................................... 48
Reading from Registers ............................................................. 49
Programming Sequence to Enable the Output ...................... 52
Register Details ........................................................................... 54
Applications Information .............................................................. 70
Example Module Power Calculation ....................................... 70
Driving Inductive Loads ............................................................ 71
Outline Dimensions ....................................................................... 72
Ordering Guide............................................................................... 72
REVISION HISTORY
5/2018—Revision 0: Initial Version
Rev. 0 | Page 2 of 72
Data Sheet
FUNCTIONAL BLOCK DIAGRAM
AV
DD2
AGND
AV
DD1
SW+
V
DPC+
PGND1
AD5758
V
LDO
V
LOGIC
DGND
CLKOUT
AD0
AD1
RESET
LDAC
SCLK
SDI
SYNC
SDO
FAULT
POWER
MANAGEMENT
BLOCK
MCLK
10MHz
POWER-ON
RESET
CALIBRATION
MEMORY
DC-TO-DC
CONVERTER
DYNAMIC POWER CONTROL
DIGITAL
BLOCK
3-WIRE INTERFACE
DATA AND
CONTROL
REGISTERS
WATCHDOG
TIMER
16
DAC
REG
16
16-BIT
DAC
V
DPC+
I
OUT
RANGE
SCALING
R
B
R
A
V
X
I
OUT
R
SET
USER GAIN
USER OFFSET
FPS_OUT
C
HART
STATUS
REGISTER
REFIN
REFERENCE
BUFFERS
TEMPERATURE
SENSOR
12-BIT
ADC
ANALOG
DIAGNOSTICS
V
OUT
RANGE
SCALING
V
DPC+
+V
SENSE
VI
OUT_INT
V
OUT
FPS_EN
VI
OUT
–V
SENSE
REFOUT
REFGND
VREF
C
COMP
AD5758
AV
SS
11840-002
Figure 1.
Rev. 0 | Page 3 of 72
AD5758
SPECIFICATIONS
Data Sheet
AV
DD1
= V
DPC+
= 15 V; dc-to-dc converter disabled; AV
DD2
= 5 V; AV
SS
= −15 V; V
LOGIC
= 1.71 V to 5.5 V; AGND = DGND = REFGND =
PGND1 = 0 V; REFIN = 2.5 V external; voltage output: R
L
= 1 kΩ, C
L
= 220 pF; current output: R
L
= 300 Ω; all specifications at T
A
=
−40°C to +115°C, unless otherwise noted.
Table 1.
Parameter
VOLTAGE OUTPUT
Output Voltage Ranges (V
OUT
)
Min
Typ
Max
Unit
Test Conditions/Comments
Statement of available ranges rather than
absolute minimum and maximum values
Trimmed V
OUT
ranges
Output Voltage Overranges
Output Voltage Offset Ranges
Resolution
VOLTAGE OUTPUT ACCURACY
0
0
−5
−10
0
0
−6
−12
−0.3
−0.4
16
5
10
+5
+10
6
12
+6
+12
+5.7
+11.6
V
V
V
V
V
V
V
V
V
V
Bits
Untrimmed overranges
Untrimmed negatively offset ranges
Loaded and unloaded, accuracy specifications
refer to trimmed V
OUT
ranges only, unless
otherwise noted
−0.05
−0.01
15
0.35
−0.006
−1
−0.02
+0.05
+0.01
1.5
+0.006
+1
+0.02
% FSR
% FSR
ppm FSR
ppm FSR/°C
% FSR
LSB
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
T
A
= 25
o
C
Drift after 1000 hours, T
J
= 150
o
C
Output drift
All ranges
Guaranteed monotonic, all ranges
Total Unadjusted Error (TUE)
TUE Long-Term Stability
1
Output Drift
Relative Accuracy (INL)
Differential Nonlinearity (DNL)
Zero-Scale Error
Zero-Scale Error Temperature
Coefficient (TC)
2
Bipolar Zero Error
Bipolar Zero Error TC
2
Offset Error
Offset Error TC
2
Gain Error
Gain Error TC
2
Full-Scale Error
Full-Scale Error TC
2
VOLTAGE OUTPUT
CHARACTERISTICS
Headroom
Footroom
Short-Circuit Current
Load
2
Capacitive Load Stability
2
±0.002
±0.3
+0.001
±0.3
±0.002
±0.3
±0.001
±0.3
±0.001
±0.3
−0.015
−0.02
−0.02
−0.02
+0.015
+0.02
+0.02
+0.02
±5 V, ±10 V
±5 V, ±10 V
1.5
1.5
16
1
2.5
2.5
10
2
5
10
10
V
V
mA
kΩ
nF
μF
mΩ
μV/V
μV/V
With respect to V
DPC+
supply
With respect to the AV
SS
supply
For specified performance
External compensation capacitor of 220 pF
connected
DC Output Impedance
DC Power Supply Rejection
Ratio (PSRR)
V
OUT
/−V
SENSE
Common-Mode
Rejection Ration (CMRR)
Error in V
OUT
voltage due to changes in −V
SENSE
voltage
Rev. 0 | Page 4 of 72
Data Sheet
Parameter
CURRENT OUTPUT
Output Current Ranges (I
OUT
)
Min
0
0
4
−20
−24
−1
16
Typ
Max
24
20
20
+20
+24
+22
Unit
mA
mA
mA
mA
mA
mA
Bits
Assumes ideal 13.7 kΩ resistor
Test Conditions/Comments
AD5758
Resolution
CURRENT OUTPUT ACCURACY
(EXTERNAL R
SET
)
3
Unipolar Ranges
TUE
TUE Long-Term Stability
Output Drift
INL
DNL
Zero-Scale Error
Zero-Scale TC
2
Offset Error
Offset Error TC
2
Gain Error
Gain Error TC
2
Full-Scale Error
Full-Scale Error TC
2
Bipolar Ranges
Total Unadjusted Error (TUE)
TUE Long-Term Stability
1
Output Drift
INL
DNL
Zero-Scale Error
Zero-Scale TC
2
Bipolar Zero Error
Bipolar Zero Error TC
2
Offset Error
Offset Error TC
2
Gain Error
Gain Error TC
2
Full-Scale Error
Full-Scale Error TC
2
4 mA to 20 mA, 0 mA to 20 mA, and 0 mA to
24 mA ranges
−0.06
−0.012
125
3
−0.006
−1
−0.03
−0.035
−0.05
−0.06
+0.06
+0.012
7
+0.006
+1
+0.03
+0.035
+0.05
+0.06
% FSR
% FSR
ppm FSR
ppm FSR/°C
% FSR
LSB
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
% FSR
ppm FSR
ppm FSR/°C
% FSR
LSB
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
% FSR
ppm FSR/°C
T
A
= 25
o
C
Drift after 1000 hours, T
J
= 150°C
Guaranteed monotonic
±0.002
±0.5
±0.001
±0.7
±0.001
±4
±0.001
±3.5
±20 mA, ±24 mA, and −1 mA to +22 mA ranges
−0.13
−0.014
125
12
−0.01
−1
−0.04
−0.02
−0.15
−0.25
−0.12
+0.13
+0.014
15.5
+0.01
+1
+0.04
+0.02
+0.15
+0.25
+0.12
T
A
= 25
o
C
Drift after 1000 hours, T
J
= 150°C
Guaranteed monotonic
±0.002
±0.5
±0.002
±0.4
±0.002
±12
±0.003
±22
±0.002
±11
Rev. 0 | Page 5 of 72
Microcontroller MCU
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