Precision Low Noise JFET Operational Amplifiers
ISL28110, ISL28210
The ISL28110, ISL28210, are single and dual JFET amplifiers
featuring low noise, high slew rate, low input bias current and
offset voltage, making them the ideal choice for high
impedance applications where precision and low noise are
important. The combination of precision, low noise, and high
speed combined with a small footprint provides the user with
outstanding value and flexibility relative to similar competitive
parts.
Applications for these amplifiers include precision medical
and analytical instrumentation, sensor conditioning, precision
power supply controls, industrial controls and photodiode
amplifiers.
The ISL28110 single amplifier is available in the 8 Ld SOIC,
TDFN, and MSOP packages. The ISL28210 dual amplifier is
available in the 8 Ld SOIC and TDFN packages. All devices are
offered in standard pin configurations and operate over the
extended temperature range from -40°C to +125°C.
Features
• Wide Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . . 9V to 40V
• Low Voltage Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6nV/√Hz
• Input Bias Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2pA
• High Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23V/µs
• High Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5MHz
• Low Input Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . 300µV,
Max
• Offset Drift . . . . . . . . . . . . . . . . . . . . . . . . . . Grade C 10µV/°C
• Low Current Consumption . . . . . . . . . . . . . . . . . . . . . . 2.55mA
• Operating Temperature Range. . . . . . . . . . .-40°C to +125°C
• Small Package Offerings in Single, and Dual
• Pb-Free (RoHS compliant)
Applications
• Precision Instruments
• Photodiode Amplifiers
• High Impedance Buffers
• Medical Instrumentation
• Active Filter Blocks
• Industrial Controls
Related Literature
•
AN1594
ISL28210SOICEVAL1Z Evaluation Board User’s
Guide
NORMALIZED INPUT BIAS CURRENT (pA)
R
F
C
F
10
8
6
4
2
0
-2
-4
-6
-8
V
S
= ±15V
V
+
-
PHOTO
DIODE
R
SH
C
T
+
OUTPUT
V
-
BASIC APPLICATION CIRCUIT - PHOTODIODE AMPLIFIER
-10
-15
-10
-5
0
V
CM
(V)
5
10
15
FIGURE 1. TYPICAL APPLICATION
FIGURE 2. INPUT BIAS CURRENT vs COMMON MODE INPUT
VOLTAGE
September 14, 2011
FN6639.2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2010, 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
ISL28110, ISL28210
Pin Configurations
ISL28110
(8 LD TDFN)
TOP VIEW
NC 1
-IN A 2
+IN A 3
V
-
4
PAD
- +
8 NC
7 V
+
6 V
OUT
A
5 NC
NC
-IN A
+IN A
V
-
ISL28110
(8 LD, SOIC, MSOP)
TOP VIEW
1
2
3
4
- +
8
7
6
5
NC
V
+
V
OUT
A
NC
ISL28210
(8 LD TDFN)
TOP VIEW
V
OUT
A
-IN A
+IN A
V
-
1
2
3
4
PAD
- +
+ -
8 V
+
7 V
OUT
B
6 -IN B
5 +IN B
V
OUT
A
-IN A
+IN A
V
-
1
2
3
4
ISL28210
(8 LD SOIC)
TOP VIEW
8
- +
+ -
7
6
5
V
+
V
OUT
B
-IN B
+IN B
Pin Descriptions
ISL28110
(8 LD TDFN)
3
2
6
4
ISL28110
(8 LD SOIC,
8 LD MSOP)
3
2
6
4
ISL28210
(8 LD TDFN)
3
2
1
4
5
6
7
7
1, 5, 8
PAD
7
1, 5, 8
PAD
PAD
8
ISL28210
(8 LD SOIC)
3
2
1
4
5
6
7
8
PIN
NAME
+IN A
-IN A
V
OUT
A
V
-
+IN B
-IN B
V
OUT
B
V
+
EQUIVALENT
CIRCUIT
Circuit 1
Circuit 1
Circuit 2
Circuit 3
Circuit 1
Circuit 1
Circuit 2
Circuit 3
DESCRIPTION
Amplifier A non-inverting input
Amplifier A inverting input
Amplifier A output
Negative power supply
Amplifier B non-inverting input
Amplifier B inverting input
Amplifier B output
Positive power supply
No connect
Thermal Pad is electrically isolated from
active circuitry. Pad can float, connect to
Ground or to a potential source that is
free from signals or noise sources.
V
+
CAPACITIVELY
TRIGGERED
ESD CLAMP
V
-
CIRCUIT 3
V
+
IN-
IN+
V
+
OUT
V
-
CIRCUIT 2
V
-
CIRCUIT 1
2
FN6639.2
September 14, 2011
ISL28110, ISL28210
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
ISL28110FBZ
ISL28210FBZ
Coming Soon
ISL28110FRTZ
Coming Soon
ISL28210FRTZ
Coming Soon
ISL28110FRTBZ
Coming Soon
ISL28210FRTBZ
Coming Soon
ISL28110FBBZ
Coming Soon
ISL28210FBBZ
Coming Soon
ISL28110FUBZ
Coming Soon
ISL28110FUZ
ISL28210SOICEVAL1Z
NOTES:
1. Add “-T*” suffix for tape and reel. 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
ISL28110, ISL28210.
For more information on MSL please see techbrief
TB363.
PART
MARKING
28110 FBZ -C
28210 FBZ -C
-C 8110
-C 8210
8110
8210
28110 FBZ -C
28210 FBZ
8110Z
8110Z
Evaluation Board
TCV
OS
(µV/°C)
10 (C Grade)
10 (C Grade)
10 (C Grade)
10 (C Grade)
4 (B Grade)
4 (B Grade)
4 (B Grade)
4 (B Grade)
4 (B Grade)
10 (C Grade)
PACKAGE
(Pb-free)
8 Ld SOIC
8 Ld SOIC
8 Ld TDFN
8 Ld TDFN
8 Ld TDFN
8 Ld TDFN
8 Ld SOIC
8 Ld SOIC
8 Ld MSOP
8 Ld MSOP
M8.15E
M8.15E
L8.3x3A
L8.3x3A
L8.3x3A
L8.3x3A
M8.15E
M8.15E
M8.118
M8.118
PKG.
DWG. #
3
FN6639.2
September 14, 2011
ISL28110, ISL28210
Absolute Voltage Ratings
Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42V
Maximum Supply Turn On Voltage Slew Rate. . . . . . . . . . . . . . . . . . . 1V/µs
Maximum Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33V
Min/Max Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . V
-
- 0.5V to V
+
+ 0.5V
Max/Min Input Current for Input Voltage >V+ or <V- . . . . . . . . . . . . . . . ±20mA
Output Short-Circuit Duration
(1 output at a time) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Ratings
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4000V
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400V
Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000V
Thermal Information
Thermal Resistance (Typical)
θ
JA
(°C/W)
θ
JC
(°C/W)
8 Ld SOIC (Notes 5, 7)
ISL28110. . . . . . . . . . . . . . . . . . . . . . . . . .
125
70
ISL28210. . . . . . . . . . . . . . . . . . . . . . . . . .
120
50
8 Ld TDFN (Notes 4, 6)
ISL28110. . . . . . . . . . . . . . . . . . . . . . . . . .
48
7.8
ISL28210. . . . . . . . . . . . . . . . . . . . . . . . . .
46
4.5
8 Ld MSOP (Notes 5, 7)
ISL28110. . . . . . . . . . . . . . . . . . . . . . . . . .
158
60
Ambient Operating Temperature Range . . . . . . . . . . . . . .-40°C to +125°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
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:
4.
θ
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
5.
θ
JA
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
θ
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
7. For
θ
JC
, the “case temp” location is taken at the package top center.
Electrical Specifications
temperature range, -40°C to +125°C.
PARAMETER
V
S
= ±5V, V
CM
= 0,
VOUT
= 0V, T
A
= +25°C, unless otherwise noted. Boldface limits apply over the operating
MIN
(Note 8)
MAX
(Note 8)
DESCRIPTION
CONDITIONS
TYP
UNITS
INPUT CHARACTERISTICS
V
OS
TCV
OS
I
B
Input Offset Voltage
-40°C < T
A
< +125°C
Input Offset Voltage Temperature
Coefficient
Input Bias Current
ISL28110
-40°C < T
A
< +125°C
-2
-40°C < T
A
< +60°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
Input Bias Current
ISL28210
-40°C < T
A
< +60°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
I
OS
Input Offset Current
ISL28110
-40°C < T
A
< +60°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
Input Offset Current
ISL28210
-40°C < T
A
< +60°C
-40°C < T
A
< +85°C
-40°C < T
A
< +125°C
C
IN-DIFF
C
IN-CM
Differential Input Capacitance
Common Mode Input Capacitance
-5.3
-36
-235
-2
-4.5
-50
-245
-1
-2.25
-30
-105
-1
-3.5
-32
-245
8.3
11.8
±0.15
±0.15
±0.3
-300
-1300
1
±0.3
300
1300
10
2
5.3
36
235
2
4.5
50
245
1
2.25
30
105
1
3.5
32
245
µV
µV
µV/°C
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pF
pF
4
FN6639.2
September 14, 2011
ISL28110, ISL28210
V
S
= ±5V, V
CM
= 0,
VOUT
= 0V, T
A
= +25°C, unless otherwise noted. Boldface limits apply over the operating
temperature range, -40°C to +125°C. (Continued)
PARAMETER
R
IN-DIFF
R
IN-CM
V
CMIR
CMRR
DESCRIPTION
Differential Input Resistance
Common Mode Input Resistance
Common Mode Input Voltage Range
Guaranteed by CMRR test
V
-
+ 1.5
V
-
+ 2.5
Common Mode Rejection Ratio
V
CM
= -3.5V to +3.5V
V
CM
= -2.5V to +2.5V
A
VOL
Open-loop Gain
R
L
= 10kΩ to ground
V
O
= -3V to +3V
88
104
103
90
100
108
CONDITIONS
MIN
(Note 8)
TYP
530
560
V
+
- 1.5
V
+
- 2.5
MAX
(Note 8)
UNITS
GΩ
GΩ
V
V
dB
dB
dB
dB
Electrical Specifications
DYNAMIC PERFORMANCE
GBWP
SR
THD+N
Gain-bandwidth Product
Slew Rate, V
OUT
20% to 80%
Total Harmonic Distortion + Noise
G = 100, R
L
= 100kΩ, C
L
= 4pF
G = -1, R
L
= 2kΩ, 4V Step
G = 1, f = 1kHz, 4V
P-P
, R
L
= 2kΩ
G = 1, f = 1kHz, 4V
P-P
, R
L
= 600Ω
t
s
Settling Time to 0.1%
4V Step; 10% to V
OUT
Settling Time to 0.01%
4V Step; 10% to V
OUT
A
V
= 1, V
OUT
= 4V
P-P
, R
L
= 2kΩ to V
CM
A
V
= 1, V
OUT
= 4V
P-P
, R
L
= 2kΩ to V
CM
11
12.5
20
0.0002
0.0003
0.4
1
MHz
V/µs
%
%
µs
µs
NOISE PERFORMANCE
e
nP-P
e
n
Peak-to-Peak Input Voltage Noise
Input Voltage Noise Spectral Density
0.1Hz to 10Hz
f = 10Hz
f = 100Hz
f = 1kHz
f = 10kHz
i
n
V
OL
Input Current Noise Spectral Density
f = 1kHz
580
14
7
6
6
9
nV
P-P
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
fA/√Hz
OUTPUT CHARACTERISTICS
Output Voltage Low, V
OUT
to V
-
R
L
= 10kΩ
R
L
= 2kΩ
V
OH
Output Voltage High, V
+
to V
OUT
R
L
to GND = 10kΩ
R
L
to GND = 2kΩ
I
SC
Output Short Circuit Current
R
L
= 10Ω to V+. V-
Guaranteed by PSRR
V
S
= ± 4.5V to ±5V
±4.5
102
100
I
S
Supply Current/Amplifier
2.5
2.9
3.8
115
0.8
1.0
1.1
0.9
1.1
1.2
0.8
1.0
1.1
0.9
1.1
1.2
±50
V
V
V
V
V
V
V
V
mA
POWER SUPPLY
V
SUPPLY
PSRR
Supply Voltage Range
Power Supply Rejection Ratio
±20V
V
dB
dB
mA
mA
5
FN6639.2
September 14, 2011
