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1
FN7467.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
PRELIMINARY
EL8188
Micropower Single Supply Rail-to-Rail
Input-Output Op Amp
The EL8188 is a micropower operational amplifier optimized
for single supply operation at 5V and can operate down to
2.4V.
The EL8188 draws minimal supply current while meeting
excellent DC-accuracy noise and output drive specifications.
Competing devices seriously degrade these parameters to
achieve micropower supply current. Offset current, voltage
and current noise, slew rate, and gain-bandwidth product are
all two to ten times better than on previous micropower op
amps.
The EL8188 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
50A supply current
1mV typical offset voltage
0.5 NA input bias current
250kHz gain-bandwidth product
0.13V/s slew rate
Single supply operation down to 2.4V
Rail-to-rail input and output
Output sources and sinks 26mA load current
Pb-Free plus anneal available (RoHS compliant)
Applications
Battery- or solar-powered systems
4mA to 25mA current loops
Handheld consumer products
Medical devices
Thermocouple amplifiers
Photodiode pre amps
pH probe amplifiers
Pressure sensor pre amp
Pinouts
EL8188
(6-PIN SOT-23)
TOP VIEW
EL8188
(8-PIN SO)
TOP VIEW
Ordering Information
PART NUMBER
(BRAND)
PACKAGE
TAPE &
REEL
PKG. DWG. #
EL8188IW-T7
(BBKA)
6-Pin SOT-23
7" (3K pcs)
MDP0038
EL8188IW-T7A
(BBKA)
6-Pin SOT-23
7" (250 pcs)
MDP0038
EL8188ISZ
(See Note)
8-Pin SO
(Pb-free)
-
MDP0027
EL8188ISZ-T7
(See Note)
8-Pin SO
(Pb-free)
7"
MDP0027
EL8188ISZ-T13
(See Note)
8-Pin SO
(Pb-free)
13"
MDP0027
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are 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.
1
2
3
6
4
5
+ -
OUT
VS-
IN+
VS+
ENABLE
IN-
1
2
3
4
8
7
6
5
-
+
NC
IN-
IN+
ENABLE
VS+
VOUT
VS-
NC
Data Sheet
August 25, 2005
2
FN7467.1
August 25, 2005
Absolute Maximum Ratings
(T
A
= 25C)
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to V
S
+ 0.5V
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2kV
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . .Indefinite
Ambient Operating Temperature Range . . . . . . . . . .-40C to +85C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65C to +150C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
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
Electrical Specifications
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, T
A
= 25C unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
V
OS
Input Offset Voltage
1
4
mV
Input Offset Drift vs Temperature
EL8188IW
1.9
V/C
EL8188IS
1.1
V/C
I
B
Input Bias Current
0.5
1
NA
e
N
Input Noise Voltage Density
f
O
= 1kHz
35
nV/
Hz
CMIR
Input Voltage Range
Guaranteed by CMRR test
0
5
V
CMRR
Common-Mode Rejection Ratio
V
CM
= 0V to 5V
80
100
dB
PSRR
Power Supply Rejection Ratio
V
S
= 3.3V to 5V
80
100
dB
A
VOL
Large Signal Voltage Gain
V
O
= 0.5V to 4.5V, R
L
= 100k
100
400
V/mV
V
O
= 0.5V to 4.5V, R
L
= 1k
15
V/mV
V
OUT
Maximum Output Voltage Swing
Output low, R
L
= 100k
3
6
mV
Output low, R
L
= 1k
130
200
mV
Output high, R
L
= 100k
4.994
4.997
V
Output high, R
L
= 1k
4.8
4.88
V
SR
Slew Rate
0.09
0.13
0.17
V/s
GBW
Gain Bandwidth Product
f
O
= 100kHz
250
kHz
I
S,ON
Supply Current, Enabled
40
50
75
A
I
S,OFF
Supply Current, Disabled
3
10
A
I
O
+
Short Circuit Output Current
R
L
= 10
18
31
mA
I
O
-
Short Circuit Output Current
R
L
= 10
17
26
mA
V
S
Minimum Supply Voltage
2.2 2.4 V
V
INH
Enable Pin High Level
2
V
V
INL
Enable Pin Low Level
0.8
V
I
ENH
Enable Pin Input Current
V
EN
= 5V
0.25
0.7
2
A
I
ENL
Enable Pin Input Current
V
EN
= 0V
-0.5
0
+0.5
A
V
OS
T
----------------
EL8188
3
FN7467.1
August 25, 2005
Typical Performance Curves
FIGURE 1. UNITY GAIN FREQUENCY RESPONSE vs
SUPPLY VOLTAGE
FIGURE 2. FREQUENCY RESPONSE vs CLOSED LOOP GAIN
FIGURE 3. SUPPLY CURRENT vs SUPPLY VOLTAGE
FIGURE 4. INPUT OFFSET VOLTAGE vs OUTPUT VOLTAGE
FIGURE 5. INPUT OFFSET VOLTAGE vs COMMON-MODE
INPUT VOLTAGE
FIGURE 6. INPUT BIAS, OFFSET CURRENT vs COMMON-
MODE INPUT VOLTAGE
-3
-2
-1
0
1
1K
10K
100K
1M
V
S
= 1.0V
V
S
= 2.5V
V
S
= 1.25
MAGNI
T
UDE (dB
)
FREQUENCY (Hz)
-20
-10
0
10
20
30
40
50
60
70
80
1
10
100
1K
10K
100K 1M
10M
FREQUENCY (Hz)
G
A
IN
(
d
B)
GAIN = 200
Gain = 1K
Gain = 500
GAIN = 100
GAIN = 10
GAIN =1 V/V
GAIN = 5
GAIN = 2
2
3
4
5.5
0
SUPPLY VOLTAGE (V)
S
U
P
P
L
Y
C
URRENT (A)
2.5
10
20
50
60
30
40
3.5
5
4.5
-0.5
5.5
-200
OUTPUT VOLTAGE (V)
I
N
PUT O
FFSET
VOL
T
AGE
(
V
)
-100
0
200
100
0.5
1.5
2.5
3.5
4.5
A
V
= -1
V
CM
= V
DD
/2
-0.5
5.5
-250
COMMON-MODE INPUT VOLTAGE (V)
I
N
PUT O
F
FS
ET
VOL
T
AGE
(
V
)
-150
-50
250
150
0.5
1.5
2.5
3.5
4.5
50
-0.5
5.5
-20
COMMON-MODE INPUT VOLTAGE (V)
INP
U
T
BIA
S
, OFFSE
T
CURRENT
(
f
A
)
-10
0
20
0.5
1.5
2.5
3.5
4.5
10
I
B
+
I
B
-
I
OS
EL8188
4
FN7467.1
August 25, 2005
FIGURE 7.
OPEN LOOP GAIN
vs FREQUENCY @ 1k
FIGURE
8.
OPEN LOOP GAIN AND PHASE
vs FREQUENCY @
100k
FIGURE 9. CMRR vs FREQUENCY
FIGURE 10. PSRR vs FREQUENCY
FIGURE 11. VOLTAGE NOISE
FIGURE 12. SOT V
OS
vs TEMPERATURE (
V
S
= 5V)
Typical Performance Curves
(Continued)
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
1
10
100
1K
10K
100K
1M
10M
FREQUENCY (Hz)
GAIN (d
B)
PHASE
GAIN
-40
-20
0
20
40
60
80
100
P
HASE ()
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
1
10
100
1K
10K
100K
1M
10M
FREQUENCY (Hz)
GAIN (d
B)
-40
-20
0
20
40
60
80
100
GAIN
PHASE
P
HASE ()
0
20
40
60
80
100
120
1
10
100
1K
10K
100K
1M
FREQUENCY (Hz)
CMR
R
(dB)
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
FREQUENCY (Hz)
PO
W
E
R
S
U
PPL
Y REJE
CT
ION RA
TIO (dB)
PSRR+
PSRR-
1
10
100
1K
10K
100K
1M
1
10
100
1000
1
10
100
1K
10K
100K
FREQUENCY (Hz)
V
O
L
T
A
GE
NO
ISE
(
n
V
/
Hz
)
-800
-600
-400
-200
0
200
400
600
800
-60
-40
-20
0
20
40
60
80
100 120
TEMPERATURE (C)
V
OS
(V)
35 6-PIN SOT23 SAMPLES
TYPICAL = 1.9V/C
EL8188
5
FN7467.1
August 25, 2005
FIGURE 13. SOIC V
OS
vs TEMPERATURE (
V
S
= 5V)
FIGURE 14. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
FIGURE 15. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
Typical Performance Curves
(Continued)
-60
-40
-20
0
20
40
60
80
100 120
TEMPERATURE (C)
V
OS
(V)
-400
-300
-200
-100
0
100
200
300
400
35 SOIC SAMPLES
TYPICAL = 1.1V/C
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
0
POW
E
R DISS
IP
A
T
ION
(W)
0.4
1
0.8
0.2
0.6
0
100
125
150
AMBIENT TEMPERATURE (C)
50
25
75 85
435mW
909mW
JA
=230
C/W
SOT
23-6
JA
=1
10
C
/W
SO
8
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
0
POWER DISS
IP
A
T
ION
(W)
0.2
0.7
0.6
0.1
0.4
0.5
0.3
0
100
125
150
AMBIENT TEMPERATURE (C)
50
25
75 85
391mW
625mW
JA
=1
60
C
/W
SO
8
JA
=25
6C/
W
SO
T23
-6
EL8188
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