INTERSIL ISL28006FH

ISL28006
Features
The ISL28006 is a micropower, uni-directional
high-side and low-side current sense amplifier
featuring a proprietary rail-to-rail input current sensing
amplifier. The ISL28006 is ideal for high-side current
sense applications where the sense voltage is usually
much higher than the amplifier supply voltage. The
device can be used to sense voltages as high as 28V
when operating from a supply voltage as low as 2.7V.
The micropower ISL28006 consumes only 50µA of supply
current when operating from a 2.7V to 28V supply.
• Low Power Consumption . . . . . . . . . . . . 50µA,Typ
The ISL28006 features a common-mode input voltage
range from 0V to 28V. The proprietary architecture
extends the input voltage sensing range down to 0V,
making it an excellent choice for low-side ground sensing
applications. The benefit of this architecture is that a high
degree of total output accuracy is maintained over the
entire 0V to 28V common mode input voltage range.
The ISL28006 is available in fixed (100V/V, 50V/V, 20V/V
and Adjustable) gains in the space saving 5 Ld SOT-23
package and the 6 Ld SOT-23 package for the adjustable
gain part. The parts operate over the extended
temperature range from -40°C to +125°C.
• Supply Range. . . . . . . . . . . . . . . . . . 2.7V to 28V
• Wide Common Mode Input . . . . . . . . . 0V to 28V
• Gain Versions
- ISL28006-100 .
- ISL28006-50. .
- ISL28006-20. .
- ISL28006-ADJ .
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.......
.......
.......
ADJ (Min
. . . . . 100V/V
. . . . . . 50V/V
. . . . . . 20V/V
Gain = 20V/V)
• Operating Temperature Range . . .-40°C to +125°C
• Packages . . . . . . . . . . . 5 Ld SOT-23, 6 Ld SOT-23
Applications*(see page 23)
• Power Management/Monitors
• Power Distribution and Safety
• DC/DC, AC/DC Converters
• Battery Management/Charging
• Automotive Power Distribution
Related Literature*(see page 23)
• See AN1532 for “ISL28006 Evaluation Board User’s
Guide”
Typical Application
Gain Accuracy vs VRS+ = 0V to
28V
SENSE
RSENSE
+5VDC
ISL28006
+
SENSE
+5VDC
+12VDC
OUTPUT
RSENSE
-
+5VDC
ISENSE
+5VDC
SENSE
+1.0VDC
RSENSE
MULTIPLE
OUTPUT
POWER SUPPLY
GND
September 16, 2010
FN6548.4
1
+5VDC
ISL28006
+
+1.0VDC
OUTPUT
ISENSE
+1.0VDC
+100°C
0.4
ISENSE
+12VDC
+5VDC
OUTPUT
ISL28006
+
0.6
-40°C
+25°C +125°C
GAIN 100
0.2
ACCURACY (%)
+12VDC
0
-0.2
-0.4
-0.6
-0.8
-1
-1.2
-1.4
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VRS+ (V)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL28006
Micropower, Rail to Rail Input Current Sense Amplifier
with Voltage Output
ISL28006
Block Diagram
VCC
VCC
I = 2.86µA
I = 2.86µA
VSENSE
VSENSE
RS+
R1
gmHI
HIGH-SIDE
AND
LOW-SIDE
SENSING
HIGH-SIDE
AND
LOW-SIDE
SENSING
RS+
R1
gmHI
RS-
RSR2
R2
+
-
1.35V
R3
gmLO
RR44
IMIRROR
+
OUT
R3
Rg
R5
VSENSE
RR44
GND
FIXED GAIN PARTS
OUT
-
1.35V
Rf
Rf
FB
gmLO
Rg
R5
VSENSE
IMIRROR
GND
ADJUSTABLE GAIN PART
Pin Configurations
ISL28006-ADJ
(6 LD SOT-23)
TOP VIEW
ISL28006-100, 50, 20
(5 LD SOT-23)
TOP VIEW
GND 1
OUT 2
FB 1
5 RSFIXED
GAIN
OUT 2
VCC 3
4 RS+
VCC 3
6 GND
ADJ.
GAIN
5 RS4 RS+
Pin Descriptions
ISL28006-100, 50, 20
(5 LD SOT-23)
ISL28006-ADJ
(6 LD SOT-23)
PIN NAME
1
6
GND
DESCRIPTION
Power Ground
1
FB
2
2
OUT
Input Pin for External Resistors
Amplifier Output
3
3
VCC
Positive Power Supply
4
4
RS+
Sense Voltage Non-inverting Input
5
5
RS-
Sense Voltage Inverting Input
FB
VCC
RS-
CAPACITIVELY
COUPLED
ESD CLAMP
OUT
RS+
GND
2
FN6548.4
September 16, 2010
ISL28006
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART MARKING
(Note 4)
GAIN
PACKAGE
Tape & Reel
(Pb-Free)
PKG.
DWG. #
ISL28006FH100Z-T7
100V/V
BDJA
5 Ld SOT-23
P5.064A
ISL28006FH100Z-T7A
100V/V
BDJA
5 Ld SOT-23
P5.064A
ISL28006FH50Z-T7
50V/V
BDHA
5 Ld SOT-23
P5.064A
ISL28006FH50Z-T7A
50V/V
BDHA
5 Ld SOT-23
P5.064A
ISL28006FH20Z-T7
20V/V
BDGA
5 Ld SOT-23
P5.064A
ISL28006FH20Z-T7A
20V/V
BDGA
5 Ld SOT-23
P5.064A
ISL28006FHADJZ-T7
ADJ
BDFA
6 Ld SOT-23
P6.064
ISL28006FHADJZ-T7A
ADJ
BDFA
6 Ld SOT-23
P6.064
ISL28006FH-100EVAL1Z
100V/V Evaluation Board
ISL28006FH-50EVAL1Z
50V/V Evaluation Board
ISL28006FH-20EVAL1Z
20V/V Evaluation Board
ISL28006FH-ADJEVAL1Z
Adjustable Evaluation Board
NOTES:
1. 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 ISL28006. For more information on MSL please
see techbrief TB363.
4. The part marking is located on the bottom of the part.
3
FN6548.4
September 16, 2010
ISL28006
Absolute Maximum Ratings
Thermal Information
Max Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 28V
Max Differential Input Current . . . . . . . . . . . . . . . . . 20mA
Max Differential Input Voltage . . . . . . . . . . . . . . . . . .+0.5V
Max Input Voltage (RS+, RS-, FB). . . . . . . GND - 0.5V to 30V
Max Input Current for Input Voltage <GND - 0.5V . . . . ±20mA
Output Short-Circuit Duration . . . . . . . . . . . . . . . Indefinite
Di-Electrically Isolated PR40 Process. . . . . . . . Latch-up free
ESD Rating
Human Body Model (Tested per JESD22-A114F) . . . . . 4kV
Machine Model (Tested per EIA/JESD22-A115-A) . . . . 200V
Charged Device Model (Tested per JESD22-C101D) . . . 1.5kV
Thermal Resistance (Typical)
θJA (°C/W) θJC (°C/W)
5 Ld SOT-23 (Notes 5, 6) . . . . . . .
190
90
6 Ld SOT-23 (Notes 5, 6) . . . . . . .
180
90
Maximum Storage Temperature Range . . . -65°C to +150°C
Maximum Junction Temperature (TJMAX) . . . . . . . . . +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Ambient Temperature Range (TA) . . . . . . . -40°C to +125°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact
product reliability and result in failures not covered by warranty.
NOTES:
5. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief
TB379 for details.
6. For θJC, the “case temp” location is taken at the package top center.
Electrical Specifications VCC = 12V, VRS+ = 0V to 28V, VSENSE = 0V, RLOAD = 1MΩ, TA = +25°C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40°C to +125°C.
Temperature data established by characterization.
PARAMETER
VOS
(Input Offset
Voltage)
DESCRIPTION
Gain = 100
(Notes 8, 9)
CONDITIONS
VCC = VRS+ = 12V, VSENSE = 20mV to
100mV
VCC = 12V, VRS+ = 0.2V, VSENSE = 20mV to
100mV
Gain = 50, Gain = 20
(Notes 8, 9)
VCC = VRS+ = 12V, VSENSE = 20mV to
100mV
VCC = 12V, VRS+ = 0.2V, VSENSE = 20mV to
100mV
Adjustable, Gain = 21
Rf = 100kΩ, Rg = 5kΩ
(Notes 8, 9)
VCC = VRS+ = 12V, VSENSE = 20mV to
100mV
VCC = 12V, VRS+ = 0.2V, VSENSE = 20mV to
100mV
IRS+, IRS -
Leakage Current
4
VCC = 0V, VRS+ = 28V
MIN
(Note 7)
TYP
-250
60
-300
-2.5
-1.2
-2.8
-300
60
-450
-2.8
-1.2
-3.2
-300
60
-450
-3.1
-1.2
-3.4
0.041
MAX
(Note 7) UNIT
250
µV
300
µV
2.5
mV
2.8
mV
300
µV
450
µV
2.8
mV
3.2
mV
300
µV
450
µV
3.1
mV
3.4
mV
1.2
µA
1.5
µA
FN6548.4
September 16, 2010
ISL28006
Electrical Specifications VCC = 12V, VRS+ = 0V to 28V, VSENSE = 0V, RLOAD = 1MΩ, TA = +25°C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40°C to +125°C.
Temperature data established by characterization. (Continued)
PARAMETER
IRS+
(+ Input Bias
Current)
DESCRIPTION
Gain = 100
CONDITIONS
MIN
(Note 7)
VRS+ = 2V, VSENSE = 5mV
VRS+ = 0V, VSENSE = 5mV
TYP
4.7
-500
MAX
(Note 7) UNIT
6
µA
7
µA
-432
nA
-600
Gain = 50, Gain = 20
VRS+ = 2V, VSENSE = 5mV
VRS+ = 0V, VSENSE = 5mV
nA
4.7
-700
6
µA
8
µA
-432
nA
-840
ADJ Gain = 101
Rf = 100kΩ, Rg = 1kΩ
VRS+ = 2V, VSENSE = 5mV
VRS+ = 0V, VSENSE = 5mV
nA
4.7
-500
6
µA
7
µA
-432
nA
-600
IRS (- Input Bias
Current)
G = 100, 50, 20, ADJ
VRS+ = 2V, VSENSE = 5mV
VRS+ = 0V, VSENSE = 5mV
nA
5
-125
50
nA
75
nA
-45
nA
-130
CMRR
Common Mode Rejection Ratio VRS+ = 2V to 28V
PSRR
Power Supply Rejection Ratio
VFS
G
(Gain)
nA
105
115
dB
VCC = 2.7V to 28V, VRS+ = 2V
90
105
dB
Full-scale Sense Voltage
VCC = 28V, VRS+ = 0.2V, 12V
200
(Note 8)
ISL28006-100
100
V/V
ISL28006-50
50
V/V
ISL28006-20
20
V/V
ISL28006-ADJ
GA
Gain = 100
(Gain Accuracy) (Note 10)
VCC = VRS+ = 12V, VSENSE = 20mV to
100mV
20
VCC = VRS+ = 12V, VSENSE = 20mV to
100mV
VCC = 12V, VRS+ = 0.1V, VSENSE = 20mV to
100mV
ADJ Gain = 21
Rf = 100kΩ, Rg = 5kΩ
(Note 10)
VCC = VRS+ = 12V, VSENSE = 20mV to
100mV
VCC = 12V, VRS+ = 0.1V, VSENSE = 20mV to
100mV
5
V/V
-0.2
0.7
%
-1
1
%
VCC = 12V, VRS+ = 0.1V, VSENSE = 20mV to
100mV
Gain = 50, Gain = 20
(Note 10)
mV
-0.25
%
-0.35
0.7
%
-1
1
%
2.2
%
-2.3
2.3
%
-0.65
1
%
-1
1.05
%
2.2
%
-2.2
-2.2
-2.3
-0.33
-0.33
2.3
FN6548.4
September 16, 2010
ISL28006
Electrical Specifications VCC = 12V, VRS+ = 0V to 28V, VSENSE = 0V, RLOAD = 1MΩ, TA = +25°C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40°C to +125°C.
Temperature data established by characterization. (Continued)
PARAMETER
VOA
(Total Output
Accuracy)
DESCRIPTION
Gain = 100
(Note 11)
CONDITIONS
VCC = VRS+ = 12V, VSENSE = 100mV
MIN
(Note 7)
VCC = VRS+ = 12V, VSENSE = 100mV
VCC = 12V, VRS+ = 0.1V, VSENSE = 100mV
ADJ Gain = 21
Rf = 100kΩ, Rg = 5kΩ
(Note 11)
VCC = VRS+ = 12V, VSENSE = 100mV
VCC = 12V, VRS+ = 0.1V, VSENSE = 100mV
MAX
(Note 7) UNIT
-0.7
0.7
%
-0.9
0.9
%
VCC = 12V, VRS+ = 0.1V, VSENSE = 100mV
Gain = 50, Gain = 20
(Note 11)
TYP
-1.25
%
-0.7
0.7
%
-0.9
0.9
%
1.8
%
-5.2
2.3
%
-0.7
1.05
%
-0.9
1.2
%
1.8
%
2.3
%
-4.7
-4.7
-1.41
-1.41
-5.2
VOH
Output Voltage Swing, High
VCC - VOUT
IO = -500µA, VCC = 2.7V,
VSENSE = 100mV, VRS+ = 2V
39
50
mV
VOL
Output Voltage Swing, Low
VOUT
IO = 500µA, VCC = 2.7V
VSENSE = 0V, VRS+ = 2V
30
50
mV
ROUT
Output Resistance
VCC = VRS+ = 12V, VSENSE = 100mV
IOUT = 10µA to 1mA
6.5
Ω
ISC+
Short Circuit Sourcing Current VCC = VRS+ = 5V, RL = 10Ω
4.8
mA
ISC-
Short Circuit Sinking Current
VCC = VRS+ = 5V, RL = 10Ω
8.7
mA
IS
Gain = 100
VRS+ > 2V, VSENSE = 5mV
50
Gain = 50, 20,
VRS+ > 2V, VSENSE = 5mV
50
59
µA
62
µA
62
µA
63
µA
62
µA
63
µA
28
V
ADJ Gain = 21
Rf = 100kΩ, Rg = 5kΩ
VRS+ > 2V, VSENSE = 5mV
VCC
Supply Voltage
Guaranteed by PSRR
2.7
Slew Rate
Gain = 100
Pulse on RS+ pin, VOUT = 8VP-P (Figure 65)
0.58
0.76
V/µs
Gain = 50
Pulse on RS+ pin, VOUT = 8VP-P (Figure 65)
0.58
0.67
V/µs
Gain = 20
Pulse on RS+ pin, VOUT = 3.5VP-P (Figure 65)
0.50
0.67
V/µs
ADJ Gain = 21
Rf = 100kΩ, Rg = 5kΩ
Pulse on RS+ pin, VOUT = 3.5VP-P (Figure 65)
0.50
0.67
V/µs
6
50
FN6548.4
September 16, 2010
ISL28006
Electrical Specifications VCC = 12V, VRS+ = 0V to 28V, VSENSE = 0V, RLOAD = 1MΩ, TA = +25°C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40°C to +125°C.
Temperature data established by characterization. (Continued)
PARAMETER
BW-3dB
DESCRIPTION
CONDITIONS
MAX
(Note 7) UNIT
VRS+ = 12V, 0.1V, VSENSE = 100mV
110
kHz
Gain = 50
VRS+ = 12V, 0.1V, VSENSE = 100mV
160
kHz
Gain = 20
VRS+ = 12V, 0.1V, VSENSE = 100mV
180
kHz
ADJ, Gain = 101 (Figure 57)
VRS+ = 12V, 0.1V, VSENSE = 100mV,
Rf = 100kΩ, Rg = 1kΩ
40
kHz
ADJ, Gain = 51 (Figure 57)
VRS+ = 12V, VSENSE = 100mV, Rf = 100kΩ,
Rg = 2kΩ
78
kHz
VRS+ = 0.1V, VSENSE = 100mV, Rf = 100kΩ,
Rg = 2kΩ
122
kHz
VRS+ = 12V, VSENSE = 100mV, Rf = 100kΩ,
Rg = 5kΩ
131
kHz
VRS+ = 0.1V, VSENSE = 100mV, Rf = 100kΩ,
Rg = 5kΩ
237
kHz
15
µs
20
µs
300
pF
Output Settling Time to 1% of VCC = VRS+ = 12V, VOUT = 10V step,
Final Value
VSENSE > 7mV
VCC = VRS+ = 0.2V, VOUT = 10V step,
VSENSE > 7mV
Capacitive-Load Stability
tS Power-up
TYP
Gain = 100
ADJ, Gain = 21 (Figure 57)
tS
MIN
(Note 7)
No sustained oscillations
Power-Up Time to 1% of Final VCC = VRS+ = 12V, VSENSE = 100mV
Value
VCC = 12V, VRS+ = 0.2V
VSENSE = 100mV
15
µs
50
µs
Saturation Recovery Time
10
µs
VCC = VRS+ = 12V, VSENSE = 100mV,
overdrive
NOTES:
7. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established
by characterization and are not production tested.
8. DEFINITION OF TERMS:
• VSENSEA = VSENSE @ 100mV
• VSENSEB = VSENSE @ 20mV
• VOUTA = VOUT @ VSENSEA = 100mV
• VOUTB = VOUT @ VSENSEB = 20mV
⎛ V OUT A – V OUT B ⎞
• G = GAIN = ⎜ --------------------------------------------------------------⎟
⎝ V SENSE A – V SENSE B⎠
V OUT A
9. VOS is extrapolated from the gain measurement. V OS = V SENSE A – -------------------G
⎛ G MEASURED – G EXPECTED⎞
10. % Gain Accuracy = GA = ⎜ -------------------------------------------------------------------------------⎟ × 100
G EXPECTED
⎝
⎠
⎛ VOUT MEASURED – VOUT EXPECTED⎞
11. Output Accuracy % VOA = ⎜ ----------------------------------------------------------------------------------------------------------⎟ × 100 where VOUT = VSENSE X GAIN and VSENSE = 100mV
VOUT EXPECTED
⎝
⎠
7
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
VRS+
2.0
1.4
VTH(L-H) = 1.52V
1.2
1.0
0.8
VOUT (G = 100)
0.6
0.4
0.2
1.2
0
0
0.2
0.4
0.6
0.8 1.0 1.2
TIME (ms)
1.4
1.6
1.8
2.0
FIGURE 1. HIGH-SIDE and LOW-SIDE THRESHOLD
VOLTAGE VRS+(L-H) and VRS+(H-L),
VSENSE = 10mV
6
4
G100, VOUT = 2V
G50, VOUT = 1V
G20, VOUT = 400mV
0.4
0
8
RL = 1M
VCC = 12V
0.8
G100, VOUT = 1V
G50, VOUT = 500mV
G20, VOUT = 200mV
10
VOUT (G = 100)
1.6
VTH(H-L) = 1.23V
VRS+ (V)
VOLTS (V)
12
2.4
VRS+
1.6
0
0.2
0.4
0.6
0.8
1.0 1.2
TIME (ms)
2
1.4
0
2.0
GAIN 100
10
10
8
8
VOUT (V)
VOUT (V)
1.8
12
GAIN 100
6
6
4
4
2
2
0
10
20
30
40
50
60
70
80
90
0
100
0
10
20
30
TIME (µs)
FIGURE 3. LARGE SIGNAL TRANSIENT RESPONSE
VRS+ = 0.2V, VSENSE = 100mV
GAIN 100
18 VSENSE = 20mV, 100mV
16
14
VOS (µV)
12
10
8
6
4
2
0
-250
-200
-150
-100 -50
VOS (µV)
0
50
100
FIGURE 5. VOS (µV) DISTRIBUTION AT +25°C,
VRS+ = 12V, QUANTITY: 100
8
40
50
60
TIME (µs)
70
80
90
100
FIGURE 4. LARGE SIGNAL TRANSIENT RESPONSE
VRS+ = 12V, VSENSE = 100mV
20
UNITS
1.6
FIGURE 2. VOUT vs VRS+, VSENSE = 20mV TRANSIENT
RESPONSE
12
0
VOUT (V)
1.8
Vcc = 12V, RL = 1M, unless otherwise specified.
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
-200
-400
GAIN 100
VSENSE = 20mV, 100mV
+125°C
+100°C
-40°C
0
2
4
6
8
+25°C
10 12 14 16 18 20 22 24 26 28
VRS+ (V)
FIGURE 6. VOS vs VRS+
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
250
GAIN 100
VSENSE = 20mV, 100mV
+125°C
+100°C
200
150
+100°C
+25°C
100
VOS (µV)
VOS (µV)
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
-200
-400
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
+25°C
-40°C
50
0
-50
-40°C
-100
+125°C
-150
GAIN 100
VSENSE = 2mV, 20mV
-200
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
-250
2
2.0
4
6
8
VRS+ (V)
FIGURE 7. VOS vs VRS+
3000
+100°C
FIGURE 8. VOS vs VCC, VRS+= 12V
0.6
GAIN 100
VSENSE = 2mV, 20mV
+25°C
2000
+100°C
0.4
-40°C
ACCURACY (%)
-40°C
+125°C
0
-1000
0
-0.2
-0.4
-0.6
-0.8
-1.0
-2000
GAIN 100
VSENSE = 20mV, 100mV
-1.2
-3000
2
4
6
8
0.6
0.2
ACCURACY (%)
+100°C
0
-0.2
-0.4
-40°C
-0.6
+125°C
-0.8
-1.0
GAIN 100
VSENSE = 20mV, 100mV
-1.2
0
0.2
0.4
0.6
0.8 1.0 1.2
VRS+ (V)
1.4
1.6
1.8
2.0
FIGURE 11. GAIN ACCURACY vs VRS+ = 0V TO 2V
9
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VRS+ (V)
FIGURE 10. GAIN ACCURACY vs VRS+ = 0V TO 28V
+25°C
0.4
ACCURACY (%)
-1.4
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 9. VOS vs VCC, VRS+ = 0.1V
-1.4
+25°C +125°C
0.2
1000
VOS (µV)
10 12 14 16 18 20 22 24 26 28
VCC (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-5
+100°C
+25°C
-40°C
+125°C
GAIN 100
VSENSE = 2mV, 20mV
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 12. GAIN ACCURACY vs VCC, VRS+ = 12V
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
0.2
0
0.1
-40°C
+25°C
-4
+100°C
-6
-8
+125°C
-10
-12
-14
-16
GAIN 100
VSENSE = 2mV, 20mV
-18
-20
2
4
6
8
VOA PERCENT ACCURACY (%)
2
-2
ACCURACY (%)
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
GAIN 100
0.0
-0.1
-0.2
-0.3
-40°C
-0.4
+125°C
-0.5
-0.6
+100°C
-0.7
-0.8
-0.9
+25°C
-1.0
1µ
10 12 14 16 18 20 22 24 26 28
10µ
100µ
IOUT(A)
VCC (V)
FIGURE 13. GAIN ACCURACY vs VCC, VRS+ = 0.1V
45
40
35 GAIN 100
20
GAIN 100
VSENSE = 20mV, 100mV
VRS+ = 12V
0
15
VOS (µV)
GAIN (dB)
10m
FIGURE 14. NORMALIZED VOA vs IOUT
25
VRS+= 100mV
5
-5
VCC = 12V
-15 V
SENSE = 100mV
AV = 100
-25
RL = 1M
-35
10
100
VRS+ = 12V
-20
-40
-60
-80
1k
10k
FREQUENCY (Hz)
100k
1M
-100
-50
FIGURE 15. GAIN vs FREQUENCY VRS+ = 100mV/12V,
VSENSE = 100mV, VOUT = 50mVP-P
0.30
0
25
50
75
TEMPERATURE (°C)
100
125
-0.5
GAIN 100
VRS+ = 12V
-0.6
VOUT ERROR (%)
0.20
-25
FIGURE 16. VOS (µV) vs TEMPERATURE
GAIN 100
VSENSE = 20mV, 100mV
VRS+ = 12V
0.25
GAIN ACCURACY (%)
1m
0.15
0.10
0.05
0
-0.7
-0.8
-0.9
-0.05
-0.10
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
FIGURE 17. GAIN ACCURACY (%) vs TEMPERATURE
10
-1
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
FIGURE 18. VOUT ERROR (%) vs TEMPERATURE
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
20
GAIN 50
18 VSENSE = 20mV, 100mV
16
12
VOS (µV)
UNITS
14
10
8
6
4
2
0
-250
-200
-150
-100 -50
VOS (µV)
0
50
100
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
-200
-400
GAIN 50
VSENSE = 20mV, 100mV
+125°C
-40°C
0
2
GAIN 50
VSENSE = 2mV, 0mV
150
+100°C
+100°C
100
+25°C
-40°C
50
+125°C
0
-50
+25°C
-100
-150
-40°C
-200
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
-250
2
2.0
FIGURE 21. VOS vs VRS+
3000
4
6
8
+100°C
0.6
+25°C
0.4
+125°C
0
-1000
ACCURACY (%)
1000
-40°C
+25°C
0.2
-40°C
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 22. VOS vs VCC, VRS+ = 12V
2000
VOS (µV)
+25°C
10 12 14 16 18 20 22 24 26 28
200
VRS+ (V)
0
-0.2
+100°C
-0.4
+125°C
-0.6
-0.8
-1.0
-2000
-3000
8
250
VOS (µV)
VOS (µV)
6
FIGURE 20. VOS vs VRS+
GAIN 50
VSENSE = 20mV, 100mV
+125°C
4
VRS+ (V)
FIGURE 19. VOS (µV) DISTRIBUTION AT +25°C,
VRS+ = 12V, QUANTITY: 100
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
-200
-400
+100°C
GAIN 50
VSENSE = 2mV, 0mV
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 23. VOS vs VCC, VRS+ = VRS+ = 0.1V
11
GAIN 50
VSENSE = 20mV, 100mV
-1.2
-1.4
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VRS+ (V)
FIGURE 24. GAIN ACCURACY vs VRS+ = 0V TO 28V
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
0.6
0.4
+25°C
ACCURACY (%)
ACCURACY (%)
0.2
0
-0.2
-0.4
+100°C
-0.6
-0.8
-1.0
-1.4
-40°C
+125°C
-1.2
0
0.2
0.4
0.6
GAIN 50
VSENSE = 20mV, 100mV
0.8 1.0 1.2
VRS+ (V)
1.4
1.6
1.8
2.0
FIGURE 25. GAIN ACCURACY vs VRS+ = 0V TO 2V
0
0.1
+25°C
-40°C
+100°C
-6
-8
-10
-12
+125°C
-14
-16
GAIN 50
VSENSE = 2mV, 20mV
-18
-20
2
4
6
8
VOA PERCENT ACCURACY (%)
0.2
-4
+100°C
GAIN 50
VSENSE = 2mV, 20mV
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VCC (V)
GAIN 50
0.0
-0.1
-0.2
-0.3
-40°C
-0.4
-0.5
+125°C
-0.6
-0.7
+100°C
-0.8
-0.9
+25°C
10µ
100µ
IOUT(A)
VCC (V)
FIGURE 27. GAIN ACCURACY vs VCC, LOW-SIDE
-90
25
-110
VOS (µV)
GAIN (dB)
-70
GAIN 50
VRS+= 100mV
5
-5
VRS+ = 12V
VCC = 12V
-15 V
SENSE = 100mV
A = 100
-25 V
RL = 1M
-35
10
100
1m
10m
FIGURE 28. NORMALIZED VOA vs IOUT
35
15
-40°C
+125°C
-1.0
1µ
10 12 14 16 18 20 22 24 26 28
45
+25°C
FIGURE 26. GAIN ACCURACY vs VCC, HIGH-SIDE
2
-2
ACCURACY (%)
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-5.0
GAIN 50
VSENSE = 20mV, 100mV
VRS+ = 12V
-130
-150
-170
-190
-210
1k
10k
FREQUENCY (Hz)
100k
1M
FIGURE 29. GAIN vs FREQUENCY VRS+ = 100mV/12V,
VSENSE = 100mV, VOUT = 50mVP-P
12
-230
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
FIGURE 30. VOS (µV) vs TEMPERATURE
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
0.18
0.10
GAIN 50
VSENSE = 20mV, 100mV
VRS+ = 12V
0.17
0.16
GAIN 50
0.08
VRS+ = 12V
0.06
VOUT ERROR (%)
GAIN ACCURACY (%)
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
0.15
0.14
0.13
0.12
0.04
0.02
0
-0.02
-0.04
-0.06
-0.08
0.11
-0.10
0.1
-50
-25
0
25
50
75
100
-0.12
-50
125
-25
0
TEMPERATURE (°C)
FIGURE 31. GAIN ACCURACY (%) vs TEMPERATURE
30
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
-200
-400
VOS (µV)
UNITS
20
15
10
5
0
-250
-200
-150
-100
-50
0
VOS (µV)
50
100
150
0
2
6
8
+100°C
-40°C
+25°C
10 12 14 16 18 20 22 24 26 28
FIGURE 34. VOS vs VRS+
250
GAIN 20
VSENSE = 20mV, 100mV
+125°C
4
+125°C
VRS+ (V)
GAIN 20
VSENSE = 2mV, 20mV
200
150
100
VOS (µV)
VOS (µV)
+100°C
125
GAIN 20
VSENSE = 20mV, 100mV
FIGURE 33. VOS (µV) DISTRIBUTION AT +25°C,
VRS+ = 12V, QUANTITY: 100
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
-200
-400
100
FIGURE 32. VOUT ERROR (%) vs TEMPERATURE
GAIN 20
VSENSE = 20mV, 100mV
25
25
50
75
TEMPERATURE (°C)
+25°C
-40°C
+100°C
50
0
+25°C
-50
-40°C
-100
+125°C
-150
-200
0
0.2
0.4
0.6
0.8
1
1.2
1.4
VRS+ (V)
FIGURE 35. VOS vs VRS+
13
1.6
1.8
2
-250
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 36. VOS vs VCC, VRS+ = 12V
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
3000
0.6
GAIN 20
VSENSE = 2mV, 20mV
+25°C
+100°C
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
0.4
2000
-40°C
ACCURACY (%)
VOS (µV)
1000
+125°C
0
-1000
-40°C
+25°C
0.2
0
-0.2
-0.6
-0.8
-1.0
-2000
GAIN 20
VSENSE = 20mV, 100mV
-1.2
-3000
2
4
6
8
0.6
0.2
ACCURACY (%)
+25°C
0
-0.2
-0.4
-0.6
+100°C
-40°C
-0.8
-1.0
-1.2
+125°C
0
0.2
0.4
0.6
0.8 1.0 1.2
VRS+ (V)
1.4
1.6
1.8
2.0
FIGURE 39. GAIN ACCURACY vs VRS+ = 0V TO 2V
0.1
-6
+25°C
-40°C
-8
-10
-12
+125°C
-14
-16
GAIN 20
VSENSE = 2mV, 20mV
-18
-20
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 41. GAIN ACCURACY vs VCC, LOW-SIDE
14
VOA PERCENT ACCURACY (%)
0.2
+100°C
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VRS+ (V)
GAIN 20
VSENSE = 2mV, 20mV
+100°C
+25°C
-40°C
+125°C
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 40. GAIN ACCURACY vs VCC, HIGH-SIDE
0
-2
ACCURACY (%)
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-5.0
2
-4
0
FIGURE 38. GAIN ACCURACY vs VRS+ = 0V TO 28V
GAIN 20
VSENSE = 20mV, 100mV
0.4
ACCURACY (%)
-1.4
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 37. VOS vs VCC, VRS+ = 0.1V
-1.4
+100°C
+125°C
-0.4
GAIN 20
0.0
-0.1
-0.2
+25°C
-0.3
-0.4
+125°C
-0.5
-0.6
+100°C
-0.7
-0.8
-40°C
-0.9
-1.0
1µ
10µ
100µ
IOUT(A)
1m
10m
FIGURE 42. NORMALIZED VOA vs IOUT
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
45
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
-20
GAIN 20
35
GAIN 20
VSENSE = 20mV, 100mV
VRS+ = 12V
-40
25
GAIN (dB)
VOS (µV)
-60
15
VRS+ = 100mV
5
VRS+ = 12V
-5
VCC = 12V
-15 V
SENSE = 100mV
A = 100
-25 V
RL = 1M
-35
10
100
-100
-120
1k
10k
FREQUENCY (Hz)
100k
-140
-50
1M
FIGURE 43. GAIN vs FREQUENCY VRS+ = 100mV/12V,
VSENSE = 100mV, VOUT = 50mVP-P
0.330
0.310
0.305
0.21
0.17
50
75
100
GAIN 20
VRS+ = 12V
0.23
0.295
25
0.15
-50
125
-25
0
TEMPERATURE (°C)
26
GAIN 101 ADJ
24
Rf = 100k, Rg = 1k
22
VSENSE = 20mV, 100mV
20
18
16
14
12
10
8
6
4
2
0
-200 -160 -120 -80 -40 0
40
VOS (µV)
80
120 160 200
FIGURE 47. VOS (µV) DISTRIBUTION AT +25°C,
VRS+ = 12V, QUANTITY: 100
15
25
50
75
TEMPERATURE (°C)
100
125
FIGURE 46. VOUT ERROR (%) vs TEMPERATURE
VOS (µV)
UNITS
FIGURE 45. GAIN ACCURACY (%) vs TEMPERATURE
125
0.25
0.19
0
100
0.27
0.300
-25
25
50
75
TEMPERATURE (°C)
0.29
0.3150
0.290
-50
0
0.31
VOUT ERROR (%)
0.320
-25
FIGURE 44. VOS (µV) vs TEMPERATURE
GAIN 20
VSENSE = 20mV, 100mV
VRS+ = 12V
0.325
GAIN ACCURACY (%)
-80
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
-200
-400
GAIN 101 ADJ
Rf = 100k, Rg = 1k
VSENSE = 20mV, 100mV
+125°C
+100°C
-40°C
0
2
4
6
8
+25°C
10 12 14 16 18 20 22 24 26 28
VRS+ (V)
FIGURE 48. VOS vs VRS+
FN6548.4
September 16, 2010
ISL28006
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
-200
-400
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
250
GAIN 101 ADJ
Rf = 100k, Rg = 1k
VSENSE = 20mV, 100mV
150
+125°C
100
+25°C
-40°C
GAIN 101 ADJ
Rf = 100k, Rg = 1k
VSENSE = 2mV, 20mV
200
VOS (µV)
VOS (µV)
Typical Performance Curves
+100°C
50
+25°C
0
-50
-100
+100°C
-40°C
-150
-200
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
+125°C
-250
2
2.0
4
6
8
VRS+ (V)
FIGURE 49. VOS vs VRS+
+100°C
2000
+25°C
FIGURE 50. VOS vs VCC, HIGH-SIDE
1000
VOS (µV)
0.6
GAIN 101 ADJ
Rf = 100k, Rg = 1k
VSENSE = 2mV, 20mV
-40°C
+125°C
0
0.4
-1000
+125°C
+100°C
0.2
ACCURACY (%)
3000
10 12 14 16 18 20 22 24 26 28
VCC (V)
GAIN 101 ADJ
Rf = 100k, Rg = 1k
VSENSE = 20mV, 100mV
0
-0.2
+25°C
-0.4
-40°C
-0.6
-0.8
-1.0
-2000
-1.2
-3000
2
4
6
8
FIGURE 51. VOS vs VCC, LOW-SIDE
0.6
0
+100°C
+125°C
ACCURACY (%)
ACCURACY (%)
0.2
-0.2
-0.4
-0.6
+25°C
-40°C
-0.8
-1.0
-1.2
0
0.2
0.4
0.6
0.8 1.0 1.2
VRS+ (V)
1.4
1.6
1.8
2.0
FIGURE 53. GAIN ACCURACY vs VRS+ = 0V TO 2V
16
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VRS+ (V)
FIGURE 52. GAIN ACCURACY vs VRS+ = 0V TO 28V
GAIN 101 ADJ
Rf = 100k, Rg = 1k
VSENSE = 20mV, 100mV
0.4
-1.4
-1.4
10 12 14 16 18 20 22 24 26 28
VCC (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-5.0
-40°C
+100°C
+25°C
GAIN 101 ADJ
Rf = 100k, Rg = 1k
VSENSE = 2mV, 20mV
+125°C
2
4
6
8
10 12 14 16 18 20 22 24 26 28
VCC (V)
FIGURE 54. GAIN ACCURACY vs VCC, VRS+ = 12V
FN6548.4
September 16, 2010
ISL28006
Typical Performance Curves
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
0.2
0.0
2
ACCURACY (%)
-2
+100°C +25°C -40°C
-4
-6
-8
+125°C
-10
-12
-14
GAIN 101 ADJ
Rf = 100k, Rg = 1k
VSENSE = 2mV, 20mV
-16
-18
-20
2
4
6
8
VOA PERCENT ACCURACY (%)
0
10 12 14 16 18 20 22 24 26 28
+25°C
-0.2
-40°C
-0.4
-0.6 GAIN 101 ADJ
R = 100k
-0.8 Rf = 1k
g
-1.0
0.2
0.0
-0.2
-0.4
-0.6 GAIN 21 ADJ
-0.8 Rf = 100k
R = 5k
-1.0 g
1µ
10µ
+100°C
+125°C
+25°C
-40°C
+100°C
+125°C
100µ
IOUT(A)
VCC (V)
FIGURE 55. GAIN ACCURACY vs VCC, VRS+ = 0.1V
45
GAIN (dB)
30
VRS+ = 0.1V GAIN = 21
VRS+ = 12V GAIN = 21
0
-50
GAIN = 21
-100
-150
GAIN = 101
-200
-250
-300
-350
-50
1M
FIGURE 57. GAIN vs FREQUENCY VRS+ = 100mV/12V,
VSENSE = 100mV, VOUT = 50mVP-P
-25
0
25
50
75
TEMPERATURE (°C)
100
125
FIGURE 58. VOS (µV) vs TEMPERATURE
0.6
0.40
0.5
0.35
GAIN = 101
0.30
VOUT ERROR (%)
GAIN ACCURACY (%)
GAIN = 21, 101
Rf = 100k
Rg = 1k, 5k
RL = 1M
50
10 GAIN = 21, 51, 101
Rf = 100k
5 Rg = 1k, 2k, 5k
VRS+ = 12V GAIN = 51
RL = 1M
0
100
1k
10k
100k
FREQUENCY (Hz)
0.25
0.20
0.15
VRS+ = 12V
100
VRS+ = 12V GAIN = 51
VCC = 12V
15 VSENSE = 100mV
VSENSE = 20mV, 100mV
150
VRS+ = 0.1V GAIN = 101
25
20
200
VOS (µV)
35
10m
FIGURE 56. NORMALIZED VOA vs IOUT
VRS+ = 12V GAIN = 101
40
1m
VSENSE = 20mV, 100mV
VRS+ = 12V
0.10 GAIN = 21, 101
Rf = 100k
0.05 Rg = 1k, 5k
RL = 1M
0
-50
-25
0
GAIN = 21
25
50
75
100
125
TEMPERATURE (°C)
FIGURE 59. GAIN ACCURACY (%) vs TEMPERATURE
17
0.4
GAIN = 101
0.3
0.2
0.1
VSENSE = 20mV, 100mV
VRS+ = 12V
0 GAIN = 21, 101
Rf = 100k
-0.1 Rg = 1k, 5k
RL = 1M
-0.2
-50
-25
0
GAIN = 21
25
50
75
100
125
TEMPERATURE (°C)
FIGURE 60. VOUT ERROR (%) vs TEMPERATURE
FN6548.4
September 16, 2010
ISL28006
Test Circuits and Waveforms
VR1
VCC
VCC
R1
+
+
VRS+
VSENSE
RS+
+
VSENSE
VRS+
GND
-
1MΩ
RL
-
-
VOUT
SIGNAL
GENERATOR
OUT
GND
1MΩ
RL VOUT
1MΩ
VCC
RS+
RSVRS-
GND
FIGURE 62. INPUT BIAS CURRENT, LEAKAGE CURRENT
VCC
VRS+
R2
OUT
RS-
VR2
FIGURE 61. IS, VOS, VOA, CMRR, PSRR, GAIN ACCURACY
RS+
RS+
+
OUT
RS-
VSENSE
VRS+
RL VOUT
OUT
RSGND
1MΩ
RL VOUT
PULSE
GENERATOR
FIGURE 63. ts, SATURATION RECOVERY TIME
FIGURE 64. GAIN vs FREQUENCY
VCC
RS+
OUT
RS-
VRS+
GND
1MΩ
RL
VOUT
PULSE
GENERATOR
FIGURE 65. SLEW RATE
Applications Information
Functional Description
The ISL28006-20, ISL28006-50 and ISL28006-100 are
single supply, uni-directional current sense amplifiers
with fixed gains of 20V/V, 50V/V and 100V/V
respectively. The ISL28006-ADJ is single supply,
uni-directional current sense amplifier with an adjustable
gain via external resistors (see Figure 70). The
ISL28006-ADJ is stable for gains of 20 and higher.
The ISL28006 is a 2-stage amplifier. Figure 66 shows the
active circuitry for high-side current sense applications
where the sense voltage is between 1.35V to 28V.
Figure 67 shows the active circuitry for ground sense
applications where the sense voltage is between 0V to
1.35V.
The first stage is a bi-level trans-conductance amp and
level translator. The gm stage converts the low voltage
drop (VSENSE) sensed across an external milli-ohm
sense resistor, to a current (@ gm = 21.3µA/V). The
trans-conductance amplifier forces a current through R1
18
resulting to a voltage drop across R1 that is equal to the
sense voltage (VSENSE). The current through R1 is
mirrored across R5 creating a ground-referenced voltage
at the input of the second amplifier equal to VSENSE.
The second stage is responsible for the overall gain and
frequency response performance of the device. The fixed
gains (20, 50, 100) are set with internal resistors Rf and
Rg. The variable gain (ADJ) has an additional FB pin and
uses external gain resistors to set the gain of the output.
For the fixed gain amps the only external component
needed is a current sense resistor (typically 0.001Ω to
0.01Ω, 1W to 2W).
The transfer function for the fixed gain parts is given in
Equation 1.
V OUT = GAIN × ( I S R S + V OS )
(EQ. 1)
The transfer function for the adjustable gain part is given
in Equation 2.
RF ⎞
⎛
V OUT = ⎜ 1 + --------⎟ ( I S R S + V OS )
R
⎝
G⎠
(EQ. 2)
FN6548.4
September 16, 2010
ISL28006
The input gm stage derives its ~2.86µA supply current
from the input source through the RS+ terminal as long
as the sensed voltage at the RS+ pin is >1.35V and the
gmHI amplifier is selected. When the sense voltage at
RS+ drops below the 1.35V threshold, the gmLO
amplifier kicks in and the gmLO output current reverses,
flowing out of the RS- pin.
VCC
OPTIONAL
FILTER
CAPACITOR
I = 2.86µA
VSENSE
RS+
IS
+
-
R1
VSENSE
RS
gmHI
HIGH-SIDE
SENSING
VRS+ = 2V TO 28V
VCC = 2V to 28V
RSR2
OPTIONAL
TRANSIENT
PROTECTION
+
-
1.35V
R3
OUT
Rf
ADJ
OPTION
ONLY
FB
gmLO ‘VSENSE
R5
Rg
IMIRROR
LOAD
R4
GND
FIGURE 66. HIGH-SIDE CURRENT DETECTION
VCC
OPTIONAL
FILTER
CAPACITOR
I = 2.86µA
VSENSE
RS+
IS
+
RS
R1
VSENSE
gmHI
LOW-SIDE
SENSING
VRS+= 0V TO 2V
-
VCC = 2V TO 28V
RSR2
+
OPTIONAL
TRANSIENT
PROTECTION
1.35V
R3
R4
OUT
Rf
FB
gmLO
IMIRROR
LOAD
-
VCC
R5
Rg
ADJ
OPTION
ONLY
‘VSENSE
GND
FIGURE 67. LOW-SIDE CURRENT DETECTION
19
FN6548.4
September 16, 2010
ISL28006
Hysteretic Comparator
The input trans-conductance amps are under control of a
hysteretic comparator operating from the incoming
source voltage on the RS+ pin (Figure 66). The
comparator monitors the voltage on RS+ and switches
the sense amplifier from the low-side gm amp to the
high-side gm amplifier whenever the input voltage at
RS+ increases above the 1.35V threshold. Conversely, a
decreasing voltage on the RS+ pin, causes the hysteric
comparator to switch from the high-side gm amp to the
low-side gm amp as the voltage decreases below 1.35V.
It is that low-side sense gm amplifier that gives the
ISL28006 the proprietary ability to sense current all the
way to 0V. Negative voltages on the RS+ or RS- are
beyond the sensing voltage range of this amplifier.
0.5
0.4
ACCURACY (%)
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
0.2
0.4
0.6
0.8 1.0 1.2
VRS+ (V)
1.4
1.6
1.8
protection for a 2V transient with the maximum of 20mA
flowing through the input while adding only an additional
13µV (worse case over-temperature) of VOS. Refer to
Equation 3:
( ( R P × I RS- ) = ( 100Ω × 130nA ) = 13μV )
Switching applications can generate voltage spikes that
can overdrive the amplifier input and drive the output of
the amplifier into the rails, resulting in a long overload
recover time. Capacitors CM and CD filter the common
mode and differential voltage spikes.
Error Sources
There are 3 dominant error sources: gain error, input
offset voltage error and Kelvin voltage error (see
Figure 69). The gain error is dominated by the internal
resistance matching tolerances. The remaining errors
appear as sense voltage errors at the input to the
amplifier. They are VOS of the amplifier and Kelvin
voltage errors. If the transient protection resistor is
added, an additional VOS error can result from the IxR
voltage due to input bias current. The limiting resistor
should only be added to the RS- input, due to the
high-side gm amplifier (gmHI) sinking several micro
amps of current through the RS+ pin.
Layout Guidelines
2.0
The Kelvin Connected Sense Resistor
FIGURE 68. GAIN ACCURACY vs VRS+ = 0V TO 2V
Typical Application Circuit
Figure 70 shows the basic application circuit and optional
protection components for switched-load applications.
For applications where the load and the power source is
permanently connected, only an external sense resistor
is needed. For applications where fast transients are
caused by hot plugging the source or load, external
protection components may be needed. The external
current limiting resistor (RP) in Figure 70 may be
required to limit the peak current through the internal
ESD diodes to <20mA. This condition can occur in
applications that experience high levels of in-rush current
causing high peak voltages that can damage the internal
ESD diodes. An RP resistor value of 100Ω will provide
The source of Kelvin voltage errors is illustrated in
Figure 69. The resistance of 1/2 Oz copper is ~1mΩ per
square with a TC of ~3900ppm/°C (0.39%/°C). When
you compare this unwanted parasitic resistance with the
total 1mΩ to 10mΩ resistance of the sense resistor, it is
easy to see why the sense connection must be chosen
very carefully. For example, consider a maximum current
of 20A through a 0.005Ω sense resistor, generating a
VSENSE = 0.1 and a full scale output voltage of 10V
(G = 100). Two side contacts of only 0.25 square per
contact puts the VSENSE input about 0.5 x 1mΩ away
from the resistor end capacitor. If only 10A the 20A total
current flows through the kelvin path to the resistor, you
get an error voltage of 10mV (10A x 0.5sq x 0.001Ω/sq.
= 10mV) added to the 100mV sense voltage for a sense
voltage error of 10% (0.110V-0.1)/0.1V)x 100.
CURRENT
RESISTOR
CurrentSENSE
Sense Resistor
1mΩ
10mΩ
1 toTO
10mO
Non-uniform
NON-UNIFORM
CURRENT
FLOW
Current Flow
CURRENT
Current InIN
(EQ. 3)
Copper
Trace TRACE
1/2
Oz COPPER
1mΩ /SQ
30mO/Sq.
CURRENT OUT
Current Out
KELVIN
CONTACTS
Kelvin VVSContacts
PC
PCBOARD
Board
S
FIGURE 69. PC BOARD CURRENT SENSE KELVIN CONNECTION
20
FN6548.4
September 16, 2010
ISL28006
2.7VDC
TO
28VDC
VCC
I = 2.86µA
RS+
(1mΩ
RS TO
0.1Ω)
FIXED GAIN
OPTION
ONLY
gmHI
CD
RS-
CM
+
RP
+
-
OUT
-
1.35V
0.1VDC
TO
28VDC
ADJ
OPTION
ONLY
FB
gmLO
LOAD
GND
FIGURE 70. TYPICAL APPLICATION CIRCUIT
Overall Accuracy (VOA %)
where:
VOA is defined as the total output accuracy
Referred-to-Output (RTO). The output accuracy contains
all offset and gain errors, at a single output voltage.
Equation 4 is used to calculate the % total output
accuracy.
• PDMAXTOTAL is the sum of the maximum power
dissipation of each amplifier in the package (PDMAX)
⎛ V OUT actual – V OUT exp ected⎞
V OA = 100 × ⎜ ------------------------------------------------------------------------------------⎟
V OUT exp ected
⎝
⎠
(EQ. 4)
where
VOUT Actual = VSENSE x GAIN
Example: Gain = 100, For 100mV VSENSE input we
measure 10.1V. The overall accuracy (VOA) is 1% as
shown in Equation 5.
10.1 – 10
V OA = 100 × ⎛ ------------------------⎞ = 1%
⎝
10 ⎠
(EQ. 5)
It is possible to exceed the +150°C maximum junction
temperatures under certain load and power supply
conditions. It is therefore important to calculate the
maximum junction temperature (TJMAX) for all
applications to determine if power supply voltages, load
conditions, or package type need to be modified to
remain in the safe operating area. These parameters are
related using Equation 6:
21
V OUTMAX
PD MAX = V S × I qMAX + ( V S - V OUTMAX ) × ---------------------------R
(EQ. 7)
L
where:
• TMAX = Maximum ambient temperature
• θJA = Thermal resistance of the package
• PDMAX = Maximum power dissipation of 1 amplifier
• VCC = Total supply voltage
• IqMAX = Maximum quiescent supply current of 1
amplifier
Power Dissipation
T JMAX = T MAX + θ JA xPD MAXTOTAL
• PDMAX for each amplifier can be calculated using
Equation 7:
• VOUTMAX = Maximum output voltage swing of the
application
RL = Load resistance
(EQ. 6)
FN6548.4
September 16, 2010
ISL28006
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to
web to make sure you have the latest Rev.
DATE
REVISION
CHANGE
9/2/10
FN6548.4
Added -T7A tape and reel options to Ordering Information Table for all packages.
5/12/10
FN6548.3
Added Note 4 to Part Marking Column in “Ordering Information” on page 3.
Corrected hyperlinks in Notes 1 and 3 in “Ordering Information” on page 3.
4/8/10
Removed “Coming Soon” from evaluation boards in “Ordering Information” on page 3.
4/7/10
Added “Related Literature*(see page 23)” on page 1
Updated Package Drawing Number in the “Ordering Information” on page 3 for the 20V, 50V and 100V
options from MDP0038 to P50.64A.
Revised package outline drawing from MDP0038 to P5.064A on page 24. MDP0038 package contained 2
packages for both the 5 and 6 Ld SOT-23. MDP0038 was obsoleted and the packages were separated
and made into 2 separate package outline drawings; P5.064A and P6.064A. Changes to the 5 Ld SOT23 were to move dimensions from table onto drawing, add land pattern and add JEDEC reference
number.
3/10/10
FN6548.2
Releasing adjustable gain option.
Added adjustable block diagram (Page 2), Added adjustable gain limits to electrical spec table, added
Figures 47 through 60, Added +85°C curves to Figures 6 thru 14, 20 thru 28, 34 thru 42, and Figures
48 thru 56. Modified Figure 70.
2/4/10
FN6548.1
-Page 1:
Edited last sentence of paragraph 2.
Moved order of GAIN listings from 20, 50, 100 to 100, 50, 20 in the 3rd paragraph.
Under Features ....removed "Low Input Offset Voltage 250µV, max"
Under Features .... moved order of parts listing from 20, 50, 100 (from top to bottom) to 100, 50, 20.
-Page 3:
Removed coming soon on ISL28006FH50Z and ISL28006FH20Z and changes the order or listing them
to 100, 50, 20.
-Page 5:
VOA test. Under conditions column ...deleted 20mV to. It now reads ... Vsense = 100mV
SR test. Under conditions column ..deleted what was there. It now reads ... Pulse on RS+pin, See Figure
51
-Page 6:
ts test. Removed Gain = 100 and Gain = 100V/V in both description and conditions columns respectively.
-Page 9:
Added VRS+= 12V to Figures 16, 17, 18.
-Page 11:
Added VRS+= 12V to Figures 30, 31, 32.
-Page 13 & 14:
Added VRS+= 12V to Figures 44, 45, 46.
-Page 14
Added Figure 51 and adjusted figure numbers to account for the added figure.
-Figs 8, 26, and 40 change "HIGH SIDE" to "VRS = 12V", where RS is subscript.
-Figs 9, 27, and 41 change "LOW SIDE" to "VRS = 0.1V", where RS is subscript.
12/14/09
FN6548.0
Initial Release
22
FN6548.4
September 16, 2010
ISL28006
Products
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The
Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones,
handheld products, and notebooks. Intersil's product families address power management and analog signal
processing functions. Go to www.intersil.com/products for a complete list of Intersil product families.
*For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device
information page on intersil.com: ISL28006
To report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff
FITs are available from our website at http://rel.intersil.com/reports/search.php
For additional products, see www.intersil.com/product_tree
Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications
at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by
Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any
infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any
patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
23
FN6548.4
September 16, 2010
ISL28006
Package Outline Drawing
P5.064A
5 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE
Rev 0, 2/10
1.90
0-3°
D
A
0.08-0.20
5
4
PIN 1
INDEX AREA
2.80
3
1.60
3
0.15 C D
2x
2
5
(0.60)
0.20 C
2x
0.95
SEE DETAIL X
B
0.40 ±0.05
3
END VIEW
0.20 M C A-B D
TOP VIEW
10° TYP
(2 PLCS)
2.90
5
H
0.15 C A-B
2x
C
1.45 MAX
1.14 ±0.15
0.10 C
SIDE VIEW
SEATING PLANE
(0.25) GAUGE
PLANE
0.45±0.1
0.05-0.15
4
DETAIL "X"
(0.60)
(1.20)
NOTES:
(2.40)
1.
Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2.
Dimensioning and tolerancing conform to ASME Y14.5M-1994.
3.
Dimension is exclusive of mold flash, protrusions or gate burrs.
4.
Foot length is measured at reference to guage plane.
5.
This dimension is measured at Datum “H”.
6.
Package conforms to JEDEC MO-178AA.
(0.95)
(1.90)
TYPICAL RECOMMENDED LAND PATTERN
24
FN6548.4
September 16, 2010
ISL28006
Package Outline Drawing
P6.064
6 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE
Rev 4, 2/10
0-8°
1.90
0.95
0.08-0.22
D
A
6
5
4
2.80
PIN 1
INDEX AREA
1.60 +0.15/-0.10
3
3
(0.60)
1
2
3
0.20 C
2x
0.40 ±0.10
B
SEE DETAIL X
3
0.20 M C A-B D
END VIEW
TOP VIEW
10° TYP
(2 PLCS)
2.90 ±0.10
3
1.15 +0.15/-0.25
C
0.10 C
SEATING PLANE
0.00-0.15
SIDE VIEW
(0.25)
GAUGE
PLANE
1.45 MAX
DETAIL "X"
0.45±0.1
4
(0.95)
(0.60)
(1.20)
(2.40)
NOTES:
1.
Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2.
Dimensioning and tolerancing conform to ASME Y14.5M-1994.
3.
Dimension is exclusive of mold flash, protrusions or gate burrs.
4.
Foot length is measured at reference to guage plane.
5.
Package conforms to JEDEC MO-178AB.
TYPICAL RECOMMENDED LAND PATTERN
25
FN6548.4
September 16, 2010