DATASHEET
ISL28325, ISL28345
40V Low Power Dual and Quad Operational Amplifier
The ISL28325 and ISL28345 are dual and quad general purpose
amplifiers featuring low noise vs power consumption. The
combination of low noise and small footprint provides the user
with outstanding value and flexibility relative to similar
competitive parts.
Applications for this amplifier include active filters, medical
and analytical instrumentation, power supply controls, and
industrial controls.
The ISL28325 is offered in 8 Ld SOIC and MSOP packages and
the ISL28345 is offered in the 14 Ld SOIC package and
operates over the -40°C to +125°C temperature range.
FN7854
Rev 0.00
September 27, 2011
Features
• Input Offset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 1mV, Max.
• Input Bias Current . . . . . . . . . . . . . . . . . . . . . . . . . . ±5nA, Max.
• Low Current Consumption . . . . . . . . . . . . . . . . . . . . . . . 500µA
• Voltage Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9nV/Hz
• Wide Supply Range . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 40V
• Operating Temperature Range. . . . . . . . . . .-40°C to +125°C
• Pb-Free (RoHS Compliant)
Applications
• Analytical Instrumentation
• Medical Instrumentation
• Spectral Analysis Equipment
• Active Filter Blocks
• Thermocouples and RTD Reference Buffers
• Data Acquisition
• Power Supply Control
C
1
8.2nF
V
+
-
R
1
V
IN
1.84k
4.93k
3.3nF
R
2
+
C
2
OUTPUT
V
-
SALLEN-KEY LOW PASS FILTER (10kHz)
FIGURE 1. TYPICAL APPLICATION
FN7854 Rev 0.00
September 27, 2011
Page 1 of 10
ISL28325, ISL28345
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
ISL28325FBZ
ISL28325FUZ
ISL28345FBZ
PART
MARKING
28325 FBZ
8325Z
28345 FBZ
TEMP RANGE
(°C)
-40 to +125
-40 to +125
-40 to +125
PACKAGE
(Pb-Free)
8 Ld SOIC
8 Ld MSOP
14 Ld SOIC
M8.15E
M8.118B
MDP0027
PKG.
DWG. #
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
ISL28325, ISL28345.
For more information on MSL please see techbrief
TB363.
Pin Configurations
ISL28325
(8 LD SOIC, MSOP)
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
ISL28345
(14 LD SOIC)
TOP VIEW
V
OUT
_A 1
-IN_A 2
+IN_A 3
V+ 4
+IN_B 5
-IN_B 6
V
OUT
_B 7
- +
B
+ -
C
A
- +
D
+ -
14 V
OUT
_D
13 -IN_D
12 +IN_D
11
V-
10 +IN_C
9 -IN_C
8 V
OUT
_C
FN7854 Rev 0.00
September 27, 2011
Page 2 of 10
ISL28325, ISL28345
Pin Descriptions
ISL28325
(8 LD SOIC, MSOP)
3
5
-
-
4
2
6
-
-
8
1
7
-
-
ISL28345
(14 LD SOIC)
3
5
10
12
11
2
6
9
13
4
1
7
8
14
V+
500
IN-
500
IN+
V+
OUT
V-
CIRCUIT 2
V-
PIN NAME
+IN_A
+IN_B
+IN_C
+IN_D
V-
-IN_A
-IN_B
-IN_C
-IN_D
V+
V
OUT
_A
V
OUT
_B
V
OUT
_C
V
OUT
_D
EQUIVALENT CIRCUIT
Circuit 1
DESCRIPTION
Amplifier non-inverting input
Circuit 3
Circuit 1
Negative power supply
Amplifier inverting input
Circuit 3
Circuit 2
Positive power supply
Amplifier output
V+
CAPACITIVELY
COUPLED
ESD CLAMP
CIRCUIT 3
V-
CIRCUIT 1
FN7854 Rev 0.00
September 27, 2011
Page 3 of 10
ISL28325, ISL28345
Absolute Maximum Ratings
Maximum Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....42V
Maximum Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
Maximum Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42V
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 Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300V
Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV
Thermal Information
Thermal Resistance (Typical Notes 4, 5)
JA
(°C/W)
JC
(°C/W)
8 Ld SOIC. . . . . . . . . . . . . . . . . . . . . . . . . . . .
125
65
8 Ld MSOP. . . . . . . . . . . . . . . . . . . . . . . . . . .
160
55
14 Ld SOIC. . . . . . . . . . . . . . . . . . . . . . . . . . .
73
45
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Maximum Junction Temperature (T
JMAX
) . . . . . . . . . . . . . . . . . . . . .+150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Ambient Temperature Range (T
A
) . . . . . . . . . . . . . . . . . . .-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:
4.
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
5. For
JC
, the “case temp” location is taken at the package top center.
Electrical Specifications
PARAMETER
V
OS
TCV
OS
I
B
I
OS
V
CM
CMRR
PSRR
A
VOL
V
OH
V
OL
I
S
V
S
± 5V and V
S
± 15V, V
CM
= 0, V
O
= 0V, T
A
= +25°C, unless otherwise noted. Boldface limits apply over
the operating temperature range, -40°C to +125°C.
DESCRIPTION
Input Offset Voltage
Input V
OS
Temperature Coefficient
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Open-Loop Gain
Output Voltage High
Output Voltage Low
Supply Current/Amplifier
V
CM
= -13V to +13V
V
S
= ±2.25V to ±20V
V
O
= -13V to +13V, R
L
= 10k to ground
R
L
= 10k to ground
R
L
= 10k to ground
-5
-5
-13
80
80
100
13.0
100
100
110
13.5
-13.7
0.5
-13.5
0.7
0.9
I
SC
V
SUPPLY
Short-Circuit
Supply Voltage Range
± 2.25
40
± 20
CONDITIONS
MIN
(Note 6)
-1
TYP
0.1
4
0.2
0.2
MAX
(Note 6)
1
15
5
5
13
UNIT
mV
µV/C
nA
nA
V
dB
dB
dB
V
V
mA
mA
mA
V
AC SPECIFICATIONS
GBWP
SR
e
nVp-p
e
n
in
Gain Bandwidth Product
Slew Rate, V
OUT
20% to 80%
Voltage Noise V
P-P
Voltage Noise Density
Current Noise Density
A
V
= 1k, R
L
= 2k
A
V
= 11, R
L
= 2kV
O
= 4V
P-P
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
1.2
0.4
0.4
9
0.1
MHz
V/µs
µV
P-P
nV/Hz
pA/Hz
NOTE:
6. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
FN7854 Rev 0.00
September 27, 2011
Page 4 of 10
ISL28325, ISL28345
Typical Performance Curves
200
180
160
140
120
100
80
60
40
20
0
-20 R = 10k
L
-40
C
L
= 10pF
-60
SIMULATION
-80
-100
0.1m 1m 10m 100m 1
OPEN LOOP GAIN (dB)/PHASE (°)
V
S
= ±15V, V
CM
= 0V, R
L
= Open, unless otherwise specified.
200
180
160
140
120
100
80
60
40
20
0
-20 R = 10k
L
-40
C
L
= 100pF
-60
-80 SIMULATION
-100
0.1m 1m 10m 100m 1
OPEN LOOP GAIN (dB)/PHASE (°)
PHASE
PHASE
GAIN
GAIN
10 100
1k 10k 100k 1M 10M 100M
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 2. OPEN-LOOP GAIN, PHASE vs FREQUENCY, R
L
= 10k
C
L
= 10pF
FIGURE 3. OPEN-LOOP GAIN, PHASE vs FREQUENCY, R
L
= 10k
C
L
= 100pF
220
200
180
160
CMRR (dB)
140
120
100
80
60
40
20
R
L
= INF
C
L
= 10pF
SIMULATION
1
V
S
= ±15V
V
S
= ±2.5V
V
S
= ±5V
SMALL SIGNAL (mV)
60
50
40
30
20
10
0
V
S
= ±15V
RL = 10k
CL = 4pF
AV = +1
V
OUT
= 50mV
P-P
0
1m 10m 100m
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
-10
0
5
10
15
20
25
TIME (µs)
30
35
40
FIGURE 4. CMRR vs FREQUENCY, V
S
= ±2.25, ±5V, ±15V
FIGURE 5. SMALL SIGNAL TRANSIENT RESPONSE, V
S
= ±5V, ±15V
2.4
2.0
1.6
1.2
LARGE SIGNAL (V)
0.8
0.4
0
-0.4
-0.8
-1.2
-1.6
-2.0
-2.4
0
10
20
30
CL = 4pF
AV = +1
V
OUT
= 4V
P-P
40
50
60
TIME (µs)
70
80
90
100
V
S
= ±5V, RL = 2k, 10k
V
S
= ±15V, RL = 2k, 10k
FIGURE 6. LARGE SIGNAL TRANSIENT RESPONSE vs R
L
V
S
= ±5V, ±15V
FN7854 Rev 0.00
September 27, 2011
Page 5 of 10
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