DATASHEET
EL8170, EL8173
Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifiers
The EL8170 and EL8173 are micropower instrumentation
amplifiers optimized for single supply operation over the
+2.4V to +5.5V range. Inputs and outputs can operate
rail-to-rail. As with all instrumentation amplifiers, a pair of
inputs provide very high common-mode rejection and are
completely independent from a pair of feedback terminals.
The feedback terminals allow zero input to be translated to any
output offset, including ground. A feedback divider controls the
overall gain of the amplifier.
The EL8170 is compensated for a gain of 100 or more, and the
EL8173 is compensated for a gain of 10 or more. The EL8170
and EL8173 have bipolar input devices for best offset and
1/f noise performance.
The amplifiers can be operated from one lithium cell or two
Ni-Cd batteries. The EL8170 and EL8173 input range includes
ground to slightly above positive rail. The output stage swings
to ground and positive supply (no pull-up or pull-down resistors
are needed).
FN7490
Rev 8.00
August 11, 2015
Features
• 95µA maximum supply current
• Maximum offset voltage
- 200µV (EL8170)
- 1000µV (EL8173)
• Maximum 3nA input bias current
• 396kHz -3dB bandwidth (G = 10)
• 192kHz -3dB bandwidth (G = 100)
• Single supply operation
- Input voltage range is rail-to-rail
- Output swings rail-to-rail
• Pb-Free (RoHS Compliant)
Applications
• Battery- or Solar-Powered Systems
• Strain Gauges
• Current Monitors
• Thermocouple Amplifiers
Pin Configurations
EL8170
(8 LD SOIC)
TOP VIEW
DNC 1
IN- 2
IN+ 3
V- 4
-
+
+
-
8 FB+
7 V+
6 VOUT
5 FB-
Ordering Information
PART NUMBER
(Notes 2, 3)
EL8170FSZ (Note 1)
EL8173FSZ (Note 1)
(No longer available
or supported)
EL8170FWZ-EVAL
EL8173EV1Z (No
longer available or
supported)
PART
MARKING
8170FSZ
8173FSZ
PACKAGE
(RoHS Compliant)
8 Ld SOIC
8 Ld SOIC
PKG.
DWG. #
M8.15E
M8.15E
EL8173
(8 LD SOIC)
TOP VIEW
DNC 1
IN- 2
IN+ 3
V- 4
-
+
+
-
Evaluation Board
Evaluation Board
8 FB+
7 V+
6 VOUT
5 FB-
Evaluation Board
EL8173FWZ-EVAL
(No longer available or
supported)
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
EL8170, EL8173
For more information on MSL, please see
tech brief
TB363.
FN7490 Rev 8.00
August 11, 2015
Page 1 of 14
EL8170, EL8173
Absolute Maximum Ratings
(T
A
= +25°C)
Supply Voltage Range, V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.75V, 1V/µs
Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Differential Input Voltage
EL8170. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5V
EL8173. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.0V
ESD Rating
Human Body Model (EL8173) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500V
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250V
Thermal Information
Thermal Resistance (Typical)
JA
(°C/W)
8 Ld SOIC Package (Note 4) . . . . . . . . . . . . . . . . . . . . . .
122
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
Ambient Operating Temperature . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +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.
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
Electrical Specifications
PARAMETER
V
+
= +5V, V
-
= GND, VCM = 1/2V
+
, R
L
= Open, T
A
= +25°C, unless otherwise specified. Boldface limits apply
over the operating temperature range, -40°C to +125°C.
DESCRIPTION
CONDITIONS
MIN
(Note 5)
TYP
MAX
(Note 5)
UNIT
DC SPECIFICATIONS
V
OS
Input Offset Voltage
EL8170
EL8173
TCV
OS
I
OS
I
B
V
IN
CMRR
Input Offset Voltage Temperature
Coefficient
Input Offset Current between IN+, and IN-
and between FB+ and FB-
Input Bias Current (IN+, IN-, FB+, and FB-
terminals)
Input Voltage Range
Common Mode Rejection Ratio
Guaranteed by CMRR test
EL8170
EL8173
PSRR
Power Supply Rejection Ratio
EL8170
EL8173
E
G
Gain Error
EL8170
EL8173
R
L
= 100kΩ to +2.5V
V
+
= +2.4V to +5.5V
V
CM
= 0V to +5V
EL8170
EL8173
-2
-3
-3
-4
0
90
85
85
80
85
80
75
70
-1.5
2
-0.4
-0.8
114
106
106
90
+0.35
+0.1
1.5
2
0.4
0.8
-200
-300
-1000
-1500
±50
±200
0.24
2.5
±0.2
±0.7
2
3
3
4
5
200
300
1000
1500
µV
µV
µV/°C
µV/°C
nA
nA
V
dB
dB
dB
dB
%
%
FN7490 Rev 8.00
August 11, 2015
Page 2 of 14
EL8170, EL8173
Electrical Specifications
PARAMETER
V
OUT
V
+
= +5V, V
-
= GND, VCM = 1/2V
+
, R
L
= Open, T
A
= +25°C, unless otherwise specified. Boldface limits apply
over the operating temperature range, -40°C to +125°C. (Continued)
DESCRIPTION
Maximum Voltage Swing
CONDITIONS
Output low, R
L
= 100kΩ to +2.5V
Output low, R
L
= 1kΩ to +2.5V
Output high, R
L
= 100kΩ to +2.5V
Output high, R
L
= 1kΩto +2.5V
I
S
V
SUPPLY
I
O+
Supply Current
Supply Operating Range
Output Source Current into 10 to V
+
/2
V
+
to V
-
V
+
= +5V
V
+
= +2.4V
I
O-
Output Sink Current into 10 to V
+
/2
V
+
= +5V
V
+
= +2.4V
4.985
4.980
4.75
45
38
2.4
23
19
6
4.5
19
15
5
4
32
8
26
7
MIN
(Note 5)
TYP
4
0.13
4.996
4.887
65
95
110
5.5
MAX
(Note 5)
10
0.2
0.25
UNIT
mV
V
V
V
µA
V
mA
mA
mA
mA
AC SPECIFICATIONS
-3dB BW
-3dB Bandwidth
EL8170
Gain = 100
Gain = 200
Gain = 500
Gain = 1000
EL8173
Gain = 10
Gain = 20
Gain = 50
Gain = 100
e
N
Input Noise Voltage
EL8170
EL8173
Input Noise Voltage Density
EL8170
EL8173
i
N
CMRR @ 60Hz
Input Noise Current Density
EL8170
EL8173
Input Common Mode Rejection Ratio
EL8170
EL8173
PSRR+ @
120Hz
PSRR- @
120Hz
Power Supply Rejection Ratio (V
+
)
EL8170
EL8173
Power Supply Rejection Ratio (V
-
)
EL8170
EL8173
f
o
= 1kHz
f
o
= 1kHz
V
CM
= 1V
P-P
,
R
L
= 10kΩ to V
CM
V
+
, V
-
= ±2.5V,
V
SOURCE
= 1V
P-P
,
R
L
= 10kΩto V
CM
V
+
, V
-
= ±2.5V,
V
SOURCE
= 1V
P-P
,
R
L
= 10kΩ to V
CM
0.4
0.35
f
o
= 1kHz
f = 0.1Hz to 10Hz
192
93
30
13
396
221
69
30
3.5
3.6
58
220
0.38
0.8
100
84
98
78
106
82
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
µV
P-P
µV
P-P
nV/Hz
nV/Hz
pA/Hz
pA/Hz
dB
dB
dB
dB
dB
dB
TRANSIENT RESPONSE
SR
Slew Rate
R
L
= 1kΩ to GND
0.55
0.7
0.7
V/µs
NOTE:
5. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
FN7490 Rev 8.00
August 11, 2015
Page 3 of 14
EL8170, EL8173
Typical Performance Curves
V
+
=
+5V, V-
= 0V, VCM =
+2.5V, RL = Open,
unless otherwise specified.
90
80
70
GAIN (dB)
60
50
40
30
1
GAIN = 2,000V/V
GAIN = 1,000V/V
GAIN = 500V/V
GAIN = 200V/V
GAIN = 100V/V
COMMON-MODE INPUT = 1/2V
+
GAIN = 10,000V/V
GAIN = 5,000V/V
50
GAIN (dB)
40
30
20
10
70
60
GAIN = 1000
GAIN = 500
GAIN = 200
GAIN = 100
GAIN = 50
GAIN = 20
GAIN = 10
COMMON-MODE INPUT = 1/2V
+
10
100
1k
10k
100k
1M
1
10
FREQUENCY (Hz)
10k
100
1k
FREQUENCY (Hz)
100k
1M
FIGURE 1. EL8170 FREQUENCY RESPONSE vs CLOSED LOOP
GAIN
FIGURE 2. EL8173 FREQUENCY RESPONSE vs CLOSED LOOP
GAIN
45
40
35
30
GAIN (dB)
25
20
15
10
5
0
100
A
V
AV = 100
= 100
R
L
= 10kΩ
C
L
= 10pF
R
F
/R
G
= 99.02
R
F
= 221kΩ
R
G
= 2.23kΩ
1k
10k
FREQUENCY (Hz)
100k
1M
V
+
= 3.3V
V
+
= 2.4V
GAIN (dB)
V
+
= 5V
25
V
+
= 5V
20
V
+
= 3.3V
15
10 A
V
= 10
R
L
= 10kΩ
C
L
= 10pF
5 R
F
/R
G
= 99.08Ω
R
F
= 178kΩ
R
G
= 19.6kΩ
0
100
1k
10k
FREQUENCY (Hz)
V
+
= 2.4V
100k
1M
FIGURE 3. EL8170 FREQUENCY RESPONSE vs SUPPLY VOLTAGE
FIGURE 4. EL8173 FREQUENCY RESPONSE vs SUPPLY VOLTAGE
50
30
25
C
L
= 470
P
F
C
L
= 820
P
F
GAIN (dB)
C
L
= 47
P
F
20
C
L
= 27
P
F
15
A
V
= 10
10 V+ = 5V
R
L
= 10kΩ
R
F
/R
G
= 9.08Ω
5 R
F
= 178kΩ
R
G
= 19.6kΩ
0
100
1k
10k
FREQUENCY (Hz)
C
L
= 2.7
P
F
C
L
= 100
P
F
45
GAIN (dB)
40
C
L
= 220
P
F
35
A
V
= 100
V+, V- = ±2.5V
R
L
= 10kΩ
R
F
/R
G
= 99.02
R
F
= 221kΩ
R
G
= 2.23kΩ
C
L
= 56
P
F
30
25
100
1k
10k
FREQUENCY (Hz)
100k
1M
100k
1M
FIGURE 5. EL8170 FREQUENCY RESPONSE vs C
LOAD
FIGURE 6. EL8173 FREQUENCY RESPONSE vs C
LOAD
FN7490 Rev 8.00
August 11, 2015
Page 4 of 14
EL8170, EL8173
Typical Performance Curves
V
+
=
+5V, V-
= 0V, VCM =
+2.5V, RL = Open,
unless otherwise specified.
(Continued)
120
100
80
60
40
20
0
10
CMRR
90
80
70
60
CMRR (dB)
50
40
30
20
10
0
100
1k
10k
100k
1M
-10
10
100
1k
10k
100k
1M
CMRR
CMRR (dB)
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 7. EL8170 CMRR vs FREQUENCY
FIGURE 8. EL8173 CMRR vs FREQUENCY
140
120
PSRR+
100
PSRR (dB)
80
60
40
20
0
10
PSRR-
PSRR (dB)
90
80
70
60
50
40
30
20
10
100
1k
10k
100k
1M
0
10
100
1k
10k
100k
1M
PSRR-
PSRR+
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 9. EL8170 PSRR vs FREQUENCY
FIGURE 10. EL8173 PSRR vs FREQUENCY
250
INPUT VOLTAGE NOISE (nV/Hz)
INPUT VOLTAGE NOISE (µV/Hz)
2.5
200
2.0
1.5
1.0
0.5
150
100
50
1
10
100
1k
10k
100k
0.0
1
10
100
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 11. EL8170 VOLTAGE NOISE DENSITY
FIGURE 12. EL8173 VOLTAGE NOISE DENSITY
FN7490 Rev 8.00
August 11, 2015
Page 5 of 14
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