EL8188ISZ-T7 [INTERSIL]
Micropower Single Supply Rail-to-Rail Input-Output Precision Op Amp; 微功耗单电源轨至轨输入输出精密运算放大器
| 型号： | EL8188ISZ-T7 |
| 厂家： | 
Intersil |
| 描述： | Micropower Single Supply Rail-to-Rail Input-Output Precision Op Amp |
| 文件： | 总8页 (文件大小：617K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EL8188
®
Data Sheet
August 25, 2005
FN7467.1
PRELIMINARY
Micropower Single Supply Rail-to-Rail
Input-Output Op Amp
Features
• 50µA supply current
The EL8188 is a micropower operational amplifier optimized
for single supply operation at 5V and can operate down to
2.4V.
• 1mV typical offset voltage
• 0.5 NA input bias current
• 250kHz gain-bandwidth product
• 0.13V/µs slew rate
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.
• 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)
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.
Applications
• Battery- or solar-powered systems
• 4mA to 25mA current loops
• Handheld consumer products
• Medical devices
Ordering Information
PART NUMBER
TAPE &
REEL
(BRAND)
PACKAGE
PKG. DWG. #
EL8188IW-T7
(BBKA)
6-Pin SOT-23
7” (3K pcs)
MDP0038
• Thermocouple amplifiers
• Photodiode pre amps
EL8188IW-T7A
(BBKA)
6-Pin SOT-23 7” (250 pcs)
MDP0038
MDP0027
MDP0027
MDP0027
• pH probe amplifiers
EL8188ISZ
(See Note)
8-Pin SO
(Pb-free)
-
• Pressure sensor pre amp
EL8188ISZ-T7
(See Note)
8-Pin SO
(Pb-free)
7”
Pinouts
EL8188
(6-PIN SOT-23)
TOP VIEW
EL8188ISZ-T13
(See Note)
8-Pin SO
(Pb-free)
13”
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.
OUT
VS-
IN+
1
2
3
6
5
4
VS+
ENABLE
IN-
+
-
EL8188
(8-PIN SO)
TOP VIEW
NC
IN-
1
2
3
4
8
7
6
5
ENABLE
VS+
-
+
IN+
VS-
VOUT
NC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
1-888-INTERSIL or 1-888-468-3774 | 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.
EL8188
Absolute Maximum Ratings (T = 25°C)
A
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . .Indefinite
Ambient Operating Temperature Range . . . . . . . . . .-40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C
Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to V + 0.5V
S
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2kV
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 = T = T
A
J
C
Electrical Specifications
V
= 5V, 0V, V
= 0.1V, V = 1.4V, T = 25°C unless otherwise specified.
S
CM
O
A
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
1
MAX
UNIT
mV
µV/°C
µV/°C
NA
V
Input Offset Voltage
4
OS
∆V
∆T
Input Offset Drift vs Temperature
EL8188IW
EL8188IS
1.9
1.1
0.5
35
OS
---------------
I
Input Bias Current
1
5
B
e
Input Noise Voltage Density
Input Voltage Range
f
= 1kHz
O
nV/√Hz
V
N
CMIR
CMRR
PSRR
Guaranteed by CMRR test
0
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
V
V
V
V
= 0V to 5V
80
100
100
400
15
dB
CM
= 3.3V to 5V
80
dB
S
A
= 0.5V to 4.5V, R = 100kΩ
100
V/mV
V/mV
mV
mV
V
VOL
O
O
L
= 0.5V to 4.5V, R = 1kΩ
L
V
Maximum Output Voltage Swing
Output low, R = 100kΩ
3
6
OUT
L
Output low, R = 1kΩ
130
4.997
4.88
0.13
250
50
200
L
Output high, R = 100kΩ
4.994
4.8
L
Output high, R = 1kΩ
V
L
SR
Slew Rate
0.09
0.17
V/µs
kHz
µA
GBW
Gain Bandwidth Product
Supply Current, Enabled
Supply Current, Disabled
Short Circuit Output Current
Short Circuit Output Current
Minimum Supply Voltage
Enable Pin High Level
Enable Pin Low Level
Enable Pin Input Current
Enable Pin Input Current
f
= 100kHz
O
I
I
40
75
10
S,ON
3
µA
S,OFF
I +
R
R
= 10Ω
= 10Ω
18
17
31
mA
mA
V
O
L
L
I -
26
O
V
V
V
2.2
2.4
2
S
V
INH
INL
ENH
ENL
0.8
0.25
-0.5
V
I
I
V
V
= 5V
= 0V
0.7
0
2
µA
EN
EN
+0.5
µA
FN7467.1
2
August 25, 2005
EL8188
Typical Performance Curves
1
80
70
60
50
40
30
20
10
0
Gain = 1K
Gain = 500
GAIN = 200
GAIN = 100
0
V
= ±1.25
S
-1
GAIN = 10
GAIN = 5
GAIN = 2
V
= ±2.5V
S
-2
V
= ±1.0V
S
-10
-20
GAIN =1 V/V
-3
1K
10K
100K
1M
1
10
100 1K
10K 100K 1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 1. UNITY GAIN FREQUENCY RESPONSE vs
SUPPLY VOLTAGE
FIGURE 2. FREQUENCY RESPONSE vs CLOSED LOOP GAIN
200
60
50
40
30
20
10
0
A
= -1
V
V
= V /2
DD
CM
100
0
-100
-200
-0.5
0.5
1.5
2.5
3.5
4.5
5.5
2
2.5
3
3.5
4
4.5
5
5.5
OUTPUT VOLTAGE (V)
SUPPLY VOLTAGE (V)
FIGURE 4. INPUT OFFSET VOLTAGE vs OUTPUT VOLTAGE
20
FIGURE 3. SUPPLY CURRENT vs SUPPLY VOLTAGE
250
150
50
I
OS
10
I -
B
0
-10
-20
-50
I +
B
-150
-250
-0.5
0.5
1.5
2.5
3.5
4.5
5.5
-0.5
0.5
1.5
2.5
3.5
4.5
5.5
COMMON-MODE INPUT VOLTAGE (V)
COMMON-MODE INPUT VOLTAGE (V)
FIGURE 5. INPUT OFFSET VOLTAGE vs COMMON-MODE
INPUT VOLTAGE
FIGURE 6. INPUT BIAS, OFFSET CURRENT vs COMMON-
MODE INPUT VOLTAGE
FN7467.1
August 25, 2005
3
EL8188
Typical Performance Curves (Continued)
110
100
90
110
100
90
80
70
60
50
40
30
100
80
60
40
20
0
100
80
60
40
20
0
80
GAIN
70
60
50
40
30
20
10
0
PHASE
PHASE
20
10
0
GAIN
-10
-20
-30
-40
-10
-20
-30
-40
-20
-20
-40
-40
1
10
100
1K
10K 100K 1M
10M
1
10
100
1K
10K 100K 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 7. OPEN LOOP GAIN vs FREQUENCY @ 1kΩ
FIGURE 8. OPEN LOOP GAIN AND PHASE vs FREQUENCY @
100kΩ
120
100
80
60
40
20
0
120
110
100
PSRR+
90
80
70
60
50
40
30
20
10
0
PSRR-
-10
-20
1
10
100
1K
10K
100K
1M
1
10
100
1K
10K
100K
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 9. CMRR vs FREQUENCY
FIGURE 10. PSRR vs FREQUENCY
800
1000
100
10
35 6-PIN SOT23 SAMPLES
600 TYPICAL = 1.9µV/C
400
200
0
-200
-400
-600
-800
1
-60 -40 -20
0
20 40 60 80 100 120
1
10
100
1K
10K
100K
TEMPERATURE (°C)
FREQUENCY (Hz)
FIGURE 12. SOT V
vs TEMPERATURE (V = 5V)
S
FIGURE 11. VOLTAGE NOISE
OS
FN7467.1
August 25, 2005
4
EL8188
Typical Performance Curves (Continued)
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
400
1
0.8
0.6
0.4
0.2
0
35 SOIC SAMPLES
300
200
100
0
TYPICAL = 1.1µV/C
909mW
435mW
-100
-200
-300
-400
0
25
50
75 85 100
125
150
-60 -40 -20
0
20 40 60 80 100 120
AMBIENT TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 14. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
FIGURE 13. SOIC V
vs TEMPERATURE (V = 5V)
S
OS
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
625mW
391mW
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
FIGURE 15. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
FN7467.1
5
August 25, 2005
EL8188
Typical Applications
Applications Information
Introduction
V+
EL8188
+
The EL8188 is a rail-to-rail input and output micro-power
single supply operational amplifier with an enable feature.
The device achieves rail-to-rail input and output operation
and eliminates the concerns introduced by a conventional
rail-to-rail I/O operational amplifier.
+
-
GENERAL
PURPOSE
V-
COAX
3V
COMBINATION
pH PROBE
FIGURE 16. PH PROBE AMPLIFIER
Rail-to-Rail Input
The single PFET input stage of the EL8188 has an input
common-mode voltage range that goes from negative supply
to positive supply without introducing offset errors or
degrading performance associated with a conventional rail-
to-rail input operational amplifier. Many rail-to-rail input
stages use dual differential input pairs, a long-tail PNP (or
PFET) and an NPN (or NFET). Severe penalties have to be
paid for this topology. As the input signal moves from one
supply rail to another, the operational amplifier switches from
one input pair to the other causing drastic changes in input
offset voltage and an undesired change in magnitude and
polarity of input offset current.
A general-purpose combination pH probe has extremely
high output impedance typically in the range of 10GΩ
to12GΩ. Low loss and expensive Teflon cables are often
used to connect the PH probe to the meter electronics. The
above circuit provides a low-cost alternative solution using
the EL8188 and a low-cost coax cable. The EL8188 PMOS
high impedance input senses the pH probe output signal and
buffers it to drive the coax cable. Its rail-to-rail input nature
also eliminates the need for a bias resistor network required
by other amplifiers in the same application.
R
4
The EL8188 achieves input rail-to-rail performance without
sacrificing important precision specifications and without
degrading distortion performance. The EL8188's input offset
voltage exhibits a smooth behavior throughout the entire
common-mode input range.
100kΩ
R
R
10kΩ
10kΩ
3
2
V+
+
EL8188
410µV/°C
+
-
K TYPE
V-
5V
THERMOCOUPLE
Rail-to-Rail Output
R
1
A pair of complementary MOSFET devices achieves rail-to-
rail output swing. The NMOS sinks current to swing the
output in the negative direction. The PMOS sources current
to swing the output in the positive direction. The EL8188 with
a 100kΩ load will swing to within 3mV of the supply rails.
100kΩ
FIGURE 17. THERMOCOUPLE AMPLIFIER
Thermocouples are the most popular temperature-sensing
device because of their low cost, interchangeability, and
ability to measure a wide range of temperatures. The
EL8188 is used to convert the differential thermocouple
voltage into single-ended signal with 10X gain. The
EL8188's rail-to-rail input characteristic allows the
thermocouple to be biased at ground and the converter to
run from a single 5V supply.
Enable/Disable Feature
The EL8188 offers an EN pin. The active low enable pin
disables the device when pulled up to at least 2.2V. Upon
disable the part consumes typically 3µA, while the output is
in a high impedance state. The EN also has an internal pull
down. If left open, the EN pin will pull to negative rail and the
device will be enabled by default. The high impedance at
output during disable allows multiple EL8188’s to be
connected together as a MUX. The outputs are tied together
in parallel and a channel can be selected by the EN pin.
FN7467.1
August 25, 2005
6
EL8188
SO Package Outline Drawing
FN7467.1
7
August 25, 2005
EL8188
SOT-23 Package Outline Drawing
NOTE: The package drawing shown here may not be the latest version. To check the latest revision, please refer to the Intersil website at
http://www.intersil.com/design/packages/index.asp
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN7467.1
8
August 25, 2005
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