DATASHEET
ISL28022
Precision Digital Power Monitor
The
ISL28022
is a bidirectional high-side and low-side digital
current sense and voltage monitor with serial interface. The
device monitors current and voltage and provides the results
digitally along with calculated power. The ISL28022 provides
tight accuracy of less than 0.3% for both voltage and current
monitoring over the entire input range. The digital power
monitor has configurable fault thresholds and measurable
ADC gain ranges.
The ISL28022 handles common-mode input voltage ranging
from 0V to 60V. The wide range permits the device to handle
telecom, automotive and industrial applications with minimal
external circuitry. Both high- and low-side ground sensing
applications are easily handled with the flexible architecture.
The ISL28022 consumes an average current of just 700µA and is
available in a 10 Ld MSOP package. The ISL28022 is also offered
in a space saving 16 Ld QFN package. The part operates across
the extended temperature range from -40°C to +125°C.
FN8386
Rev 8.00
February 4, 2016
Features
• Bus voltage sense range . . . . . . . . . . . . . . . . . . . . . . 0V to 60V
• 16-bit
∑∆ADC
monitors current and voltage
• Voltage measuring error . . . . . . . . . . . . . . . . . . . . . . . . . <0.3%
• Current measuring error . . . . . . . . . . . . . . . . . . . . . . . . . <0.3%
• Handles negative system voltage
• Overvoltage/undervoltage and current fault monitoring
• I
2
C/SMBus interface
• Wide V
CC
range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 5.5V
• ESD (HBM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8kV
• Supports high speed I
2
C . . . . . . . . . . . . . . . . . . . . . . . 3.4MHz
Applications
• Routers and servers
• DC/DC, AC/DC converters
• Battery management/charging
• Automotive power
• Power distribution
• Medical and test equipment
Related Literature
•
AN1955,
“Design Ideas for Intersil Digital Power Monitors”
•
AN1875,
“ISL28022 Digital Power Monitor Evaluation Kit
(ISL28022EVKIT1Z)
•
AN1811,
“ISL28022 Digital Power Monitor 8 Site Evaluation
Kit”
VCC
V
IN
= 0V TO 60V
VBUS
VINP
ADC
16-BIT
GND
R
SH
SW
MUX
VINM
I
2
C
SMBUS
SMBCLK/SCL
TO µC
SMBDAT/SDA
VOUT
VOLTAGE
REGULATOR
LOAD
V
CC
REG
MAP
A0
EN
A1
ECLK/INT
FIGURE 1. TYPICAL APPLICATION
FN8386 Rev 8.00
February 4, 2016
Page 1 of 32
ISL28022
Table of Contents
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protocol Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMBus Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Device Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Write Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Broadcast Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
2
C Clock Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Integrity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement Stability vs Acquisition Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fast Transients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over-Ranging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shunt Resistor Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lossless Current Sensing (DCR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Trace as a Sense Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
13
13
13
14
19
19
19
21
22
22
22
22
23
23
23
24
24
24
26
26
28
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
M10.118 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
L16.3x3B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
FN8386 Rev 8.00
February 4, 2016
Page 2 of 32
ISL28022
Block Diagram
VCC
VBUS
REF
SMBCLK
VINM
CM = 0 TO 60V
VINP
SW
MUX
ADC
16-BIT
16
DIGITAL
CONTROL
LOGIC
REG
MAP
I
2
C
SM BUS
SMBDAT
A1
OSC
CLOCK
DIV
ECLK/INT
A0
GND
FIGURE 2. BLOCK DIAGRAM
Ordering Information
PART NUMBER
(Notes
1, 2, 3)
ISL28022FUZ
ISL28022FRZ
ISL28022EVKIT1Z
ISL28022MBEV1Z
ISL28022EV1Z
NOTES:
1. Add “-T” suffix for QFN 6k or MSOP 2.5k units tape and reel options. Add “-T7A” suffix for 250 units tape and reel options. Please refer to
TB347
for
details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL28022.
For more information on MSL please see tech brief
TB363.
8022F
022F
PART
MARKING
TEMP RANGE
(°C)
-40 to +125
-40 to +125
PACKAGE
(RoHS Compliant)
10 Ld MSOP
16 Ld QFN
M10.118
L16.3x3B
PKG.
DWG. #
ISL28022 Evaluation Kit (Includes Dongle Board, Generic Evaluation Board, R
LOAD
Board)
ISL28022 Generic Evaluation Board
ISL28022 8-site Evaluation Board
FN8386 Rev 8.00
February 4, 2016
Page 3 of 32
ISL28022
Pin Configurations
ISL28022
(10 LD MSOP)
TOP VIEW
ISL28022
(16 LD QFN)
TOP VIEW
VINP
13
12 VINM
GND
11 VBUS
10 GND
9
5
SCL/SMBCLK
6
NC
7
NC
8
NC
VCC
NC
NC
15
NC
14
A1
A0
EXT_CLK/INT
SDA/SMBDAT
SCL/SMBCLK
1
2
3
4
5
10
9
8
7
6
VINP
VINM
VBUS
GND
VCC
16
A1 1
A0 2
EXT_CLK/INT 3
SDA/SMBDAT 4
Pin Descriptions
MSOP
PIN
NUMBER
1
2
3
4
5
6
7
8
9
10
QFN PIN
NUMBER
1
2
3
4
5
9
10
11
12
13
6, 7, 8, 14,
15, 16
Epad
PIN
NAME
A1
A0
EXT_CLK/INT
SDA/SMBDAT
SCL/SMBCLK
VCC
GND
VBUS
VINM
VINP
NC
GND
I
2
C address, Bit 1
I
2
C address, Bit 0
External ADC clock input or CPU interrupt output signal. When the pin is configured as an interrupt, the
output is an open drain.
I
2
C serial data input/output.
I
2
C clock input
Positive power pin. The positive power supply to the part.
Negative power pin. Can be connected to ground or a negative voltage.
VBUS power voltage sense.
Current sense minus input.
Current sense plus input.
No connect. No internal connection.
Negative power pin. Can be connected to ground or a negative voltage.
DESCRIPTION
FN8386 Rev 8.00
February 4, 2016
Page 4 of 32
ISL28022
TABLE 1. DPM PORTFOLIO COMPARISON - ISL28022 vs ISL28023 vs ISL28025
DESCRIPTION
PART NUMBER
PACKAGE
Temperature Range
0V to 60V Input Range
ADC
+25°C Gain Error
Current Measure LSB Step
+25°C Offset
Primary
Channel
LV Aux
Channel
VBus LSB Step
Differential Shunt Input
Independent Bus Voltage
Differential Shunt Input
Independent Bus Voltage
Low Voltage Bus
High Voltage Bus
External Temperature Sensor Input
HV Internal Regulator (3.3V
OUT
)
Fast OC/OV/UV Alert Outputs
Margin DAC
Internal Temperature Sensor
User Select Conversion Mode/Sample Rate
Peak Min/Max Current Registers
Slave Address Locations
I
2
C Level Translators
PMBus
I
2
C/SMBus
High Speed (3.4MHz) I
2
C Mode
External Clock Input
Power Shutdown Mode
X
X
X
X
16 Addresses
X
4mV
BASIC DIGITAL
POWER MONITOR
ISL28022
MSOP10, QFN16
-40°C to +125°C
0V to 60V
16-bit
0.30%
10µV
75µV
X
X
FULL FEATURE
DIGITAL POWER MONITOR
ISL28023
QFN24
-40°C to +125°C
Opt 1: 0V to 60V
Opt 2: 0V to 16V
16-bit
0.25%
2.5µV
30µV
X
X
X
X
0.25mV
1mV/0.25mV
X
X
2 Outputs
X
X
X
X
55 Addresses
X
X
X
X
X
X
X
X
X
55 Addresses
X
X
X
X
X
X
X
2 Outputs
X
0.25mV
1mV/0.25mV
DIGITAL POWER MONITOR
IN TINY PACKAGE
ISL28025
WLCSP-16
-40°C to +125°C
Opt 1: 0V to 60V
Opt 2: 0V to 16V
16-bit
0.25%
2.5µV
30µV
X
X
FN8386 Rev 8.00
February 4, 2016
Page 5 of 32
