DATASHEET
ISL28127, ISL28227, ISL28227SEH
FN6633
Rev 8.00
April 1, 2016
Precision Single and Dual Low Noise Operational Amplifiers
The ISL28127, ISL28227 and ISL28227SEH are very high
precision amplifiers featuring very low noise, low offset
voltage, low input bias current and low temperature drift
making them the ideal choice for applications requiring both
high DC accuracy and AC performance. The combination of
precision, low noise and small footprint provides the user with
outstanding value and flexibility relative to similar competitive
parts.
Applications for these amplifiers include precision active
filters, medical and analytical instrumentation, precision
power supply controls and industrial controls.
The ISL28127 single and ISL28227 dual are available in 8 Ld
SOIC, TDFN and MSOP packages. All devices are offered in
standard pin configurations and operate over the extended
temperature range to -40°C to +125°C.
The ISL28227SEH is available in a 10 Ld hermetic ceramic
Flatpack package. The device is offered in an industry
standard pin configuration and operates over the extended
temperature range from -55°C to +125°C.
Features
• Low input offset voltage . . . . . . . . . . . . . . . . . . . . ±70µV, max
ISL28227SEH ±75µV, max
• Superb offset voltage TC . . . . . . . . . . . . . . . . . .0.5µV/°C, max
ISL28227SEH 1µV/°C, max
• Wide supply range . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 40V
ISL28227SEH 4.5V to 36V
• Very low voltage noise . . . . . . . . . . . . . . . . . . . . . . . . .2.5nV/Hz
• Input bias current. . . . . . . . . . . . . . . . . . . . . . . . . . ±10nA, max
• Gain-bandwidth product . . . . . . . . . .10MHz Unity gain stable
• No phase reversal
• Operating temperature range. . . . . . . . . . . .-40°C to +125°C
ISL28227SEH -55°C to +125°C
Applications
• Precision instruments
Related Literature
• Medical instrumentation
• AN1508, ISL281x7SOICEVAL1Z Evaluation Board User’s
Guide
• Active filter blocks
• AN1509, ISL282x7SOICEVAL1Z Evaluation Board User’s
Guide
• Industrial controls
• Data acquisition
• Power supply control
• AN1556, Building an Accurate SPICE Model for Low Noise,
Low Power Precision Amplifiers
• AN1690, Electronics Meets the Challenges of Patient
Monitors
C1
1.5nF
V+
VIN
R1
R2
95.3
232
OUTPUT
+
68.3nF
C2
V-
Sallen-Key Low Pass Filter (1MHz)
FIGURE 1. TYPICAL APPLICATION
FN6633 Rev 8.00
April 1, 2016
INPUT NOISE VOLTAGE (nV√Hz)
100
VS = ±19V
AV = 1
10
1
0.1
1
10
100
1k
10k
100k
FREQUENCY (Hz)
FIGURE 2. INPUT NOISE VOLTAGE SPECTRAL DENSITY
Page 1 of 33
ISL28127, ISL28227, ISL28227SEH
Table of Contents
Related Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications ISL28127, ISL28227 (VS ±15V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications ISL28127, ISL28227 (VS ±5V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Specifications ISL28227SEH (VS ±15V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Specifications ISL28227SEH (VS ±5V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input ESD Diode Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Phase Reversal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unused Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ISL28127, ISL28227 SPICE Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
19
19
19
19
19
19
19
20
Characterization vs Simulation Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M8.15E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
L8.3x3K. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
M8.118B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K10.A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FN6633 Rev 8.00
April 1, 2016
Page 2 of 33
30
30
31
32
33
ISL28127, ISL28227, ISL28227SEH
Ordering Information
VOS (MAX)
(µV)
PART
MARKING
PART NUMBER
ISL28127FBZ (No longer available,
recommended replacement:
ISL28127FRTZ-T13) (Notes 1, 4, 6)
28127 FBZ
ISL28127FRTBZ (No longer available,
recommended replacement:
ISL28127FRTZ-T13) (Notes 1, 4, 6)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
70
8 Ld SOIC
M8.15E
8127
75 (B Grade)
8 Ld TDFN
L8.3x3K
ISL28127FRTZ (Notes 1, 4, 6)
-C 8127
150 (C Grade)
8 Ld TDFN
L8.3x3K
ISL28127FUBZ (No longer available,
recommended replacement:
ISL28127FRTZ-T13) (Notes 1, 4, 6)
8127Z
70 (B Grade)
8 Ld MSOP
M8.118B
ISL28127FUZ (No longer available,
recommended replacement:
ISL28127FRTZ-T13) (Notes 1, 4, 6)
8127Z -C
150 (C Grade)
8 Ld MSOP
M8.118B
ISL28227FBZ (Notes 2, 4, 6)
28227 FBZ
75
8 Ld SOIC
M8.15E
ISL28227FRTBZ (Notes 2, 4, 6)
8227
75 (B Grade)
8 Ld TDFN
L8.3x3K
ISL28227FRTZ (Notes 1, 4, 6)
-C 8227
150 (C Grade)
8 Ld TDFN
L8.3x3K
ISL28227FUBZ (Notes 3, 4, 6)
8227Z
75 (B Grade)
8 Ld MSOP
M8.118B
ISL28227FUZ (Notes 3, 4, 6)
8227Z -C
150 (C Grade)
8 Ld MSOP
M8.118B
ISL28227SEHMF (Note 5)
ISL28227SEHMF
75 (B Grade)
10 Ld FLATPACK
K10.A
ISL28227SEHF/PROTO (Note 5)
ISL28227 SEHF/PROTO
75 (B Grade)
10 Ld FLATPACK
K10.A
ISL28227SEHMX (Note 5)
75 (B Grade)
DIE
ISL28227SEHX/SAMPLE (Note 5)
75 (B Grade)
DIE
ISL28127SOICEVAL1Z
Evaluation Board
ISL28127MSOPEVAL1Z
Evaluation Board
ISL28227SOICEVAL2Z
Evaluation Board
ISL70227MHEVAL1Z
Evaluation Board
1. Add “-T13” suffix for 6k unit, -T7” suffix for 1k,“-T7A” suffix for 250 unit Tape and Reel options. Please refer to TB347 for details on reel specifications.
2. Add “-T13” suffix for 2.5k unit, -T7” suffix for 1k,“-T7A” suffix for 250 unit Tape and Reel options. Please refer to TB347 for details on reel specifications.
3. Add “-T13” suffix for 2.5k unit, -T7” suffix for 1.5k,“-T7A” suffix for 250 unit Tape and Reel options. Please refer to TB347 for details on reel specifications.
4. 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.
5. These Intersil Pb-free Hermetic packaged products employ 100% Au plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb
and Pb-free soldering operations.
6. For Moisture Sensitivity Level (MSL), please see device information page for ISL28127, ISL28227. For more information on MSL please see techbrief
TB363.
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
NUMBER OF DEVICES
OPERATING TEMPERATURE RANGE
ISL28127
1
-40°C to +125°C
ISL28227
2
-40°C to +125°C
ISL28227SEH
2
-55°C to +125°C
FN6633 Rev 8.00
April 1, 2016
Page 3 of 33
ISL28127, ISL28227, ISL28227SEH
Pin Configurations
ISL28227
(8 LD SOIC, MSOP)
TOP VIEW
ISL28127
(8 LD SOIC, MSOP)
TOP VIEW
NC
1
-IN_A
2
+IN_A
3
NO
AI
V - 4 AV
R
E
NG
LO
ED
RT NC
8
O
PP
SU 7 V+
R
- +O
LE
B
6 VOUTA
LA
5
NC
VOUTA
1
-IN_A
2
+IN_A
3
V-
4
NC 1
- +
+IN 3
PD
V- 4
+ -
V+
7
VOUTB
6
-IN_B
5
+IN_B
ISL28227
(8 LD TDFN)
TOP VIEW
ISL28127
(8 LD TDFN)
TOP VIEW
-IN 2
- +
8
8 NC
VOUTA 1
7 V+
-IN_A 2
6 VOUT
+IN_A 3
V- 4
5 NC
8 V+
7 VOUTB
- +
PD
+ -
6 -IN_B
5 +IN_B
ISL28227SEH
(10 LD FLATPACK)
TOP VIEW
VOUTA
1
10
-IN A
2
9
VOUTB
8
-IN B
7
+IN B
6
NC
+IN A
3
NC
4
V-
5
- +
+ -
V+
Pin Descriptions
ISL28127
(8 Ld SOIC,
8 Ld MSOP)
(NO LONGER
AVAILABLE)
ISL28127
(8 Ld TDFN)
ISL28227
(8 Ld SOIC,
8 Ld MSOP)
ISL28227
(8 Ld TDFN)
ISL28227SEH
(10 Ld Flatpack)
3
3
4
4
EQUIVALENT
CIRCUIT
+IN
Circuit 1
Amplifier noninverting input
DESCRIPTION
3
3
3
+IN_A
Circuit 1
Amplifier A noninverting input
4
4
5
V-
Circuit 3
Negative power supply
5
5
7
+IN_B
Circuit 1
Amplifier B noninverting input
-IN
Circuit 1
Amplifier inverting input
-IN_B
Circuit 1
Amplifier B inverting input
2
6
FN6633 Rev 8.00
April 1, 2016
PIN
NAME
6
8
Page 4 of 33
ISL28127, ISL28227, ISL28227SEH
Pin Descriptions (Continued)
ISL28127
(8 Ld SOIC,
8 Ld MSOP)
(NO LONGER
AVAILABLE)
ISL28227
(8 Ld SOIC,
8 Ld MSOP)
ISL28127
(8 Ld TDFN)
ISL28227
(8 Ld TDFN)
ISL28227SEH
(10 Ld Flatpack)
6
PIN
NAME
EQUIVALENT
CIRCUIT
VOUT
Circuit 2
Amplifier output
DESCRIPTION
7
7
9
VOUTB
Circuit 2
Amplifier B output
8
8
10
V+
Circuit 3
Positive power supply
6
1
1
1
VOUTA
Circuit 2
Amplifier A output
2
2
2
2
-IN_A
Circuit 1
Amplifier A inverting input
4, 6
NC
-
Not Connected – This pin is not
electrically connected internally.
PD
-
Thermal Pad. Pad should be
connected to lowest potential
source in the circuit.
7
1, 5, 8
7
1, 5, 8
PD
V+
IN-
V+
V-
V-
FN6633 Rev 8.00
April 1, 2016
CAPACITIVELY T
RIGGERED ESD
CLAMP
OUT
IN+
CIRCUIT 1
V+
CIRCUIT 2
VCIRCUIT 3
Page 5 of 33
ISL28127, ISL28227, ISL28227SEH
Absolute Maximum Ratings
Thermal Information
Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2V
Maximum Supply Voltage ISL28227SEH (Note 12) . . . . . . . . . . . . . . . . 36V
Maximum Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
Maximum Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5V
Min/Max Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V
Max/Min Input Current for
Input Voltage >V+ or