DATASHEET
ISL28108, ISL28208, ISL28408
40V Precision Single Supply Rail-to-Rail Output Low Power Operational Amplifiers
The ISL28108, ISL28208 and ISL28408 are single, dual and
quad low power precision amplifiers optimized for single
supply applications. These devices feature a common mode
input voltage range extending to 0.5V below the V- rail, a
rail-to-rail differential input voltage range for use as a
comparator, and rail-to-rail output voltage swing, which make
them ideal for single supply applications where input
operation at ground is important.
Added features include low offset voltage, and low
temperature drift making them the ideal choice for
applications requiring high DC accuracy. The output stage is
capable of driving large capacitive loads from rail-to-rail for
excellent ADC driving performance. The devices can operate
for single or dual supply from 3V (±1.5V) to 40V (±20V) and are
fully characterized at ±5V and ±15V. The combination of
precision, low power, and small footprint provide the user with
outstanding value and flexibility relative to similar competitive
parts.
Applications for these amplifiers include precision
instrumentation, data acquisition, precision power supply
control, and industrial control.
The ISL28108 single is offered in 8 Ld TDFN, MSOP and SOIC
packages. The ISL28208 dual amplifier is offered in 8 Ld
TDFN, MSOP, and SOIC packages. The ISL28408 is offered in
14 Ld SOIC package. All devices are offered in standard pin
configurations and operate over the extended temperature
range of -40°C to +125°C.
FN6935
Rev 5.00
March 4, 2014
Features
• Single or dual supply, rail-to-rail output and below ground (V-)
input capability
• Rail-to-rail input differential voltage range for comparator
applications
• Single supply range . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 40V
• Low current consumption (V
S
= ±5V). . . . . . . . . . . . . . . 165µA
• Low noise voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 15.8nV/Hz
• Low noise current. . . . . . . . . . . . . . . . . . . . . . . . . . . . 80fA/Hz
• Low input offset voltage (ISL28108) . . . . . . . . . . . . . . 150µV
• Superb temperature drift
- Voltage offset TC . . . . . . . . . . . . . . . . . . . . . . 0.1µV/°C, Typ
• Low input bias current . . . . . . . . . . . . . . . . . . . . . . . . -13nA Typ
• Operating temperature range. . . . . . . . . . . .-40°C to +125°C
• No phase reversal
Applications
• Precision instruments
• Medical instrumentation
• Data acquisition
• Power supply control
• Industrial process control
Related Literature
•
AN1658,
“ISL28208SOICEVAL2Z Evaluation Board User
Guide”
R
F
LOAD
R
IN
-
R
SENSE
10kΩ
R
IN
+
10kΩ
R
REF
+
100kΩ
V
REF
IN+
IN-
100kΩ
500
+3V
to 40V
400
V
OUT
V
OS
(µV)
300
200
100
0
-100
-200
-300
-400
-500
-16
-15.5
-15
-14.5 -14 13
13.5
14
14.5
15
-40°C
+25°C
V
S
= ±15V
+125°C
-
V+
ISL28108
V-
+
GAIN = 10
SINGLE-SUPPLY, LOW-SIDE
CURRENT SENSE AMPLIFIER
INPUT COMMON MODE VOLTAGE (V)
FIGURE 1. TYPICAL APPLICATION CIRCUIT
FIGURE 2. INPUT OFFSET VOLTAGE vs INPUT COMMON MODE
VOLTAGE, V
S
= ±15V
FN6935 Rev 5.00
March 4, 2014
Page 1 of 34
ISL28108, ISL28208, ISL28408
Table of Contents
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications, V
S
±15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications, V
S
±5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Stage Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Drive Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Phase Reversal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unused Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ISL28108, ISL28208, ISL28408 SPICE Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
21
21
21
21
21
22
22
22
Characterization vs Simulation Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Package Outline Drawing, M8.15E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Package Outline Drawing, L8.3x3K. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Package Outline Drawing, M8.118B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Package Outline Drawing, M14.15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
FN6935 Rev 5.00
March 4, 2014
Page 2 of 34
ISL28108, ISL28208, ISL28408
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
ISL28108FBZ
ISL28108FRTZ
Coming soon
ISL28108FUZ
ISL28208FBZ
ISL28208FRTZ
ISL28208FUZ
ISL28408FBZ
ISL28208SOICEVAL2Z
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to Tech Brief
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
ISL28108, ISL28208, ISL28408.
For more information on MSL please
see Tech Brief
TB363.
108Z
8108Z
28208 FBZ
208F
8208Z
28408 FBZ
Evaluation Board
PART
MARKING
28108 FBZ
TEMP. RANGE
(°C)
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
PACKAGE
(Pb-Free)
8 Ld SOIC
8 Ld TDFN
8 Ld MSOP
8 Ld SOIC
8 Ld TDFN
8 Ld MSOP
14 Ld SOIC
M8.15E
L8.3x3K
M8.118B
M8.15E
L8.3x3K
M8.118B
M14.15
PKG.
DWG. #
FN6935 Rev 5.00
March 4, 2014
Page 3 of 34
ISL28108, ISL28208, ISL28408
Pin Configurations
ISL28108
(8 LD TDFN)
TOP VIEW
NC 1
-IN 2
+IN 3
V- 4
PAD
- +
8 NC
7 V+
6 V
OUT
5 NC
NC
-IN
+IN
V-
ISL28108
(8 LD MSOP, SOIC)
TOP VIEW
1
2
3
4
- +
8
7
6
5
NC
V+
V
OUT
NC
ISL28208
(8 LD TDFN)
TOP VIEW
V
OUT
_A
-IN_A
+IN_A
V-
1
2
3
4
8 V+
7 V
OUT
_B
ISL28208
(8 LD MSOP, SOIC)
TOP VIEW
V
OUT
_A
-IN_A
+IN_A
V-
1
2
3
4
- +
+ -
8 V+
7 V
OUT
_B
6 -IN_B
5 +IN_B
PAD
- +
+ -
6 -IN_B
5 +IN_B
ISL28408
(14 LD SOIC)
TOP VIEW
VOUT_A
V
OUT
_A
1
-IN_A
-IN_A
2
14
V
OUT
_D
VOUT_A
A
- +
D
+ -
-IN_D
13
- IN
_D
+IN_D
12
+IN
_D
V
11 V-
-
+IN_C
10
+IN_C
- +
B
+ -
C
-IN_C
9
-IN_ C
8
V
O UT
_C
VOUT_C
+IN_A
+IN_A
3
V
V+ 4
+
+IN_B
+IN_B
5
-IN_B
- IN_B
6
VOUT_B
V
OUT
_B
7
FN6935 Rev 5.00
March 4, 2014
Page 4 of 34
ISL28108, ISL28208, ISL28408
Pin Descriptions
ISL28108
(8 Ld SOIC, MSOP, TDFN)
3
-
-
-
-
4
2
-
-
-
-
7
6
-
-
-
-
1, 5, 8
PAD
ISL28208
(8 Ld SOIC, MSOP, TDFN)
-
3
5
-
-
4
-
2
6
-
-
8
-
1
7
-
-
-
PAD
ISL28408
(14 Ld SOIC)
-
3
5
10
12
11
-
2
6
9
13
4
-
1
7
8
14
-
-
PIN
NAME
+IN
+IN_A
+IN_B
+IN_C
+IN_D
V-
-IN
-IN_A
-IN_B
-IN_C
-IN_D
V+
V
OUT
V
OUT
_A
V
OUT
_B
V
OUT
_C
V
OUT
_D
NC
PAD
-
-
No internal connection
Thermal Pad - TDFN package only.
Connect thermal pad to ground or most
negative potential.
Circuit 3
Circuit 2
Positive power supply
Amplifier output
Circuit 3
Circuit 1
Negative power supply
Amplifier inverting input
EQUIVALENT CIRCUIT
Circuit 1
DESCRIPTION
Amplifier non-inverting input
V+
IN-
IN+
V+
OUT
V-
CIRCUIT 2
V+
CAPACITIVELY
TRIGGERED
ESD CLAMP
V-
V-
CIRCUIT 1
CIRCUIT 3
FN6935 Rev 5.00
March 4, 2014
Page 5 of 34
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