ISL28156
NOT RECOMMENDED FOR NEW DESIGNS
NO RECOMMENDED REPLACEMENT
contact our Technical Support Center at
1-888-INTERSIL or www.intersil.com/tsc
DATASHEET
FN6154
Rev 6.00
January 16, 2014
39µA Micropower Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias
Current Op Amp
The ISL28156 is a micropower precision operational
amplifier optimized for single supply operation at 5V and can
be operated down to 2.4V.
This device features an Input Range Enhancement Circuit
(IREC), which enables it to maintain CMRR performance for
input voltages greater than the positive supply. The input
signal is capable of swinging 0.5V above a 5.0V supply
(0.25V for a 2.5V supply) and to within 10mV from ground.
The output operation is rail-to-rail.
The 1/f corner of the voltage noise spectrum is at 1kHz. This
results in low frequency noise performance, which can only
be found on devices with an order of magnitude higher than
the supply current.
The ISL28156 can be operated from one lithium cell or two
Ni-Cd batteries. The input range includes both positive and
negative rail. The output swings to both rails.
Features
• 39µA typical supply current
• 5nA max input bias current
• 250kHz gain bandwidth product (A
V
= 1)
• 2.4V to 5.5V single supply voltage range
• Rail-to-rail input and output
• Enable pin
• Pb-free (RoHS compliant)
Applications
• Battery- or solar-powered systems
• 4mA to 20mA current loops
• Handheld consumer products
• Medical devices
Ordering Information
PART NUMBER
(Note 2)
ISL28156FHZ-T7
(Note 1)
ISL28156FBZ
ISL28156FBZ-T7
(Note 1)
ISL28156EVAL1Z
PART
MARKING
GABV (Note3)
28156 FBZ
28156 FBZ
PACKAGE
(Pb-free)
6 Ld SOT-23
8 Ld SOIC
8 Ld SOIC
PKG.
DWG. #
P6.064A
M8.15E
M8.15E
• Sensor amplifiers
• ADC buffers
• DAC output amplifiers
Pinouts
ISL28156
(6 LD SOT-23)
TOP VIEW
OUT 1
V- 2
IN+ 3
+ -
6 V+
5 ENABLE
4 IN-
NC 1
IN- 2
IN+ 3
V- 4
-
+
ISL28156
(8 LD SOIC)
TOP VIEW
8 ENABLE
7 V+
6 OUT
5 NC
Evaluation Board
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. The part marking is located on the bottom of the parts.
FN6154 Rev 6.00
January 16, 2014
Page 1 of 13
ISL28156
Absolute Maximum Ratings
(T
A
= +25°C)
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Supply Turn On Voltage Slew Rate . . . . . . . . . . . . . . . . . . . . . 1V/µs
Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V
Thermal Information
Thermal Resistance
JA
(°C/W)
6 Ld SOT-23 Package (Note 4) . . . . . . . . . . . . . . . .
230
6 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . .
110
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . .Indefinite
Ambient Operating Temperature Range . . . . . . . . .-40°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . +125°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.
NOTE:
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.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
V
+
= 5V, V
-
= 0V,V
CM
= 2.5V, T
A
= +25°C unless otherwise specified.
Boldface limits apply over the
operating temperature range, -40°C to +125°C.
Temperature data established by characterization.
PARAMETER
V
OS
DESCRIPTION
Input Offset Voltage
8 Ld SOIC
6 Ld SOT-23
V
OS
---------------
-
T
I
OS
I
B
E
N
I
N
CMIR
CMRR
PSRR
A
VOL
Input Offset Drive vs Temperature
Input Offset Current
Input Bias Current
Input Noise Voltage Density
Input Noise Current Density
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
V
CM
= 0V to 5V
V
S
= 2.4V to 5V
V
O
= 0.5V to 4.5V, R
L
= 100k
V
O
= 0.5V to 4.5V, R
L
= 1k
V
OUT
Maximum Output Voltage Swing
Output low, R
L
= 100k
Output low, R
L
= 1k
Output high, R
L
= 100k
Output high, R
L
= 1k
4.992
4.99
4.85
4.8
4.88
V
F
O
= 1kHz
F
O
= 1kHz
0
80
75
90
75
200
175
35
30
3
130
4.985
6
8
150
200
V
mV
mV
70
V/mV
412
V/mV
104
dB
110
-1.5
-5
-2
-3.5
46
0.14
5
1.14
CONDITIONS
MIN
(Note 5)
-120
-200
-400
-450
1.5
0.34
1.2
2.5
5
5
nV/Hz
pA/Hz
V
dB
nA
-7
TYP
-7
MAX
(Note 5)
120
250
400
450
µV/°C
nA
µV
UNIT
µV
Electrical Specifications
FN6154 Rev 6.00
January 16, 2014
Page 2 of 13
ISL28156
V
+
= 5V, V
-
= 0V,V
CM
= 2.5V, T
A
= +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
SR
GBW
I
S,ON
I
S,OFF
I
O
+
I
O
-
V
SUPPLY
V
ENH
V
ENL
I
ENH
I
ENL
t
EN
t
EN
NOTE:
5. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.
Slew Rate
Gain Bandwidth Product
Supply Current, Enabled
Supply Current, Disabled
Short-Circuit Output Current
Short-Circuit Output Current
Supply Operating Range
Enable Pin High Level
Enable Pin Low Level
Enable Pin Input Current
Enable Pin Input Current
Enable to Output On-state Delay Time
Enable to Output Off-state Delay Time
V
EN
= 5V
V
EN
= 0V
V
OUT
= 1V (enable state);
V
EN
= High-to-Low
V
OUT
= 0V (disabled state);
V
EN
= Low-to- High
1
16
10.8
0.1
R
L
= 10
R
L
= 10
Guaranteed by PSRR test
28
23
24
18
2.4
2
0.8
1.2
1.2
25
30
µs
µs
nA
5
V
V
V
µA
26
mA
A
V
= 1
29
18
10
31
DESCRIPTION
CONDITIONS
MIN
(Note 5)
TYP
0.05
250
39
47
56
14
16
mA
µA
MAX
(Note 5)
UNIT
V/µs
kHz
µA
Electrical Specifications
FN6154 Rev 6.00
January 16, 2014
Page 3 of 13
ISL28156
Typical Performance Curves
3
2
NORMALIZED GAIN (dB)
1
0
-1
-2
-3
-4
-5
-6
-7
-8
A
V
= 1
C
L
= 16.3pF
V
OUT
= 10mV
P-P
1k
10k
100k
FREQUENCY (Hz)
1M
R
L
= 10k
R
L
= 100k
NORMALIZED GAIN (dB)
R
L
= 1k
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
C
L
= 63.3pF
C
L
= 55.3pF
C
L
= 49.3pF
C
L
= 43.3pF
C
L
= 38.3pF
C
L
= 34.3pF
A
V
= 1
R
L
= 10k
V
OUT
= 10mV
P-P
1k
10k
100k
FREQUENCY (Hz)
1M
FIGURE 1. GAIN vs FREQUENCY vs RL
70
60
50
GAIN (dB)
40
30
20
10
0
Rf = 0, Rg = INF, R
L
= 10k
-10
100
1k
10k
FREQUENCY (Hz)
100k
1M
Rf = 9.09, Rg = 1k, R
L
= INF
Rf = 1M, Rg = 1k, R
L
= 10k
R
L
= 10k
C
L
= 16.3pF
V
OUT
= 10mV
P-P
1
0
NORMALIZED GAIN (dB)
-1
-2
-3
-4
-5
-6
FIGURE 2. GAIN vs FREQUENCY vs C
L
V
S
= 2.4V
V
S
= 5V
Rf = 100k, Rg = 1k, R
L
= 10k
A
V
= 1
R
L
= 10k
-8
V
OUT
= 10mV
P-P
-9
1k
10k
-7
100k
1M
FREQUENCY (Hz)
FIGURE 3. CLOSED LOOP GAIN vs FREQUENCY
3
2
NORMALIZED GAIN (dB)
1
0
-1
-2
-3
-4
-5
-6
-7
-8
1k
A
V
= 1
R
L
= 1k
C
L
= 16.3pF
10k
100k
1M
FREQUENCY (Hz)
V
OUT
= 1V
V
OUT
= 100mV
V
OUT
= 10mV
NORMALIZED GAIN (dB)
V
OUT
= 50mV
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
FIGURE 4. GAIN vs FREQUENCY vs V
S
V
OUT
= 1V
V
OUT
= 10mV
A
V
= 1
R
L
= 10k
C
L
= 16.3pF
1k
10k
V
OUT
= 50mV
V
OUT
= 100mV
100k
1M
FREQUENCY (Hz)
FIGURE 5. GAIN vs FREQUENCY vs V
OUT
FIGURE 6. GAIN vs FREQUENCY vs V
OUT
FN6154 Rev 6.00
January 16, 2014
Page 4 of 13
ISL28156
Typical Performance Curves
(Continued)
1
0
NORMALIZED GAIN (dB)
-1
-2
-3
-4
-5
-6
-7
-8
-9
1k
A
V
= 1
R
L
= 100k
C
L
= 16.3pF
10k
FREQUENCY (Hz)
V
OUT
= 100mV
V
OUT
= 50mV
CMRR (dB)
V
OUT
= 1V
V
OUT
= 10mV
10
0
-10
-20
-30
-40
-50
-60
100k
1M
-70
100
1k
10k
FREQUENCY (Hz)
100k
1M
V
S
= 5V
A
V
= 1
R
L
= 10k
C
L
= 16.3pF
V
CM
= 1V
PP
P-P
V
S
= 2.4V
FIGURE 7. GAIN vs FREQUENCY vs V
OUT
FIGURE 8. CMRR vs FREQUENCY
10
0
-10
-20
PSRR (dB)
-30
-40
-50
-60
-70
-80
PSRR (dB)
A
V
= 1
R
L
= 1k
C
L
= 16.3pF
V
OUT
= 1V
P-P
V
S
= 2.4V
10
0
PSRR-
-10
-20
-30
-40
-50
-60
-70
-80
-90
A
V
= 1
R
L
= 1k
C
L
= 16.3pF
V
OUT
= 1V
P-P
V
S
= 5V
PSRR-
PSRR+
PSRR+
100
1k
10k
FREQUENCY (Hz)
100k
1M
100
1k
10k
FREQUENCY (Hz)
100k
1M
FIGURE 9. PSRR vs FREQUENCY, V
S
= 2.4V
160
140
120
100
80
60
40
20
0
1
10
100
FREQUENCY (Hz)
1k
10k
INPUT CURRENT NOISE (pA/Hz)
INPUT VOLTAGE NOISE (nV/Hz)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1
FIGURE 10. PSRR vs FREQUENCY, V
S
= 5V
10
100
FREQUENCY (Hz)
1k
10k
FIGURE 11. INPUT VOLTAGE NOISE vs FREQUENCY
FIGURE 12. INPUT CURRENT NOISE vs FREQUENCY
FN6154 Rev 6.00
January 16, 2014
Page 5 of 13
