1996 Burr-Brown Corporation
PDS-1365C
Printed in U.S.A. September, 1997
INA126
INA2126
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111
Internet: http://www.burr-brown.com/ FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
Micro
POWER INSTRUMENTATION AMPLIFIER
Single and Dual Versions
FEATURES
q
LOW QUIESCENT CURRENT: 175
A/chan.
q
WIDE SUPPLY RANGE:
1.35V to
18V
q
LOW OFFSET VOLTAGE: 250
V max
q
LOW OFFSET DRIFT: 3
V/
C max
q
LOW NOISE: 35nV/
Hz
q
LOW INPUT BIAS CURRENT: 25nA max
q
8-PIN DIP, SO-8, MSOP-8 SURFACE- MOUNT
DUAL: 16-Pin DIP, SO-16, SSOP-16
DESCRIPTION
The INA126 and INA2126 are precision instrumentation
amplifiers for accurate, low noise differential signal acquisi-
tion. Their two-op-amp design provides excellent perfor-
mance with very low quiescent current (175
A/chan.). This,
combined with wide operating voltage range of
1.35V to
18V, makes them ideal for portable instrumentation and data
acquisition systems.
Gain can be set from 5V/V to 10000V/V with a single
external resistor. Laser trimmed input circuitry provides
low offset voltage (250
V max), low offset voltage drift
(3
V/
C max) and excellent common-mode rejection.
Single version package options include 8-pin plastic DIP,
SO-8 surface mount, and fine-pitch MSOP-8 surface-mount.
Dual version is available in the space-saving SSOP-16 fine-
pitch surface mount, SO-16, and 16-pin DIP. All are speci-
fied for the 40
C to +85
C industrial temperature range.
APPLICATIONS
q
INDUSTRIAL SENSOR AMPLIFIER:
Bridge, RTD, Thermocouple
q
PHYSIOLOGICAL AMPLIFIER:
ECG, EEG, EMG
q
MULTI-CHANNEL DATA ACQUISITION
q
PORTABLE, BATTERY OPERATED SYSTEMS
40k
10k
10k
40k
INA126
5
4
2
1
8
3
7
6
R
G
V
IN
V
IN
+
V+
V
V
O
= (V
IN
V
IN
) G
+
80k
R
G
G = 5 +
INA126
INA2126
INA2126
INA126
INA2126
40k
10k
10k
40k
INA2126
5
7
8
1
3
4
2
9
6
R
G
V
IN
V
IN
+
V+
V
V
O
= (V
IN
V
IN
) G
+
80k
R
G
G = 5 +
V
O
= (V
IN
V
IN
) G
+
80k
R
G
G = 5 +
40k
10k
10k
40k
12
16
14
13
15
11
10
R
G
V
IN
V
IN
+
SBOS062
2
INA126, INA2126
SPECIFICATIONS
At T
A
= +25
C, V
S
=
15V, R
L
= 25k
, unless otherwise noted.
INA126P, U, E
INA126PA, UA, EA
INA2126P, U, E
INA2126PA, UA, EA
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
INPUT
Offset Voltage, RTI
100
250
150
500
V
vs Temperature
0.5
3
T
5
V/
C
vs Power Supply (PSRR)
V
S
=
1.35V to
18V
5
15
T
50
V/V
Input Impedance
10
9
|| 4
T
|| pF
Safe Input Voltage
R
S
= 0
(V)0.5
(V+)+0.5
T
T
V
R
S
= 1k
(V)10
(V+)+10
T
T
V
Common-Mode Voltage Range
V
O
= 0V
11.25
11.5
T
T
V
Channel Separation (dual)
G = 5, dc
130
dB
Common-Mode Rejection
R
S
= 0, V
CM
=
11.25V
83
94
74
90
dB
INA2126U (dual SO-16)
80
94
dB
INPUT BIAS CURRENT
10
25
T
50
nA
vs Temperature
30
T
pA/
C
Offset Current
0.5
2
T
5
nA
vs Temperature
10
T
pA/
C
GAIN
G = 5 to 10k
T
V/V
Gain Equation
G = 5 + 80k
/R
G
T
V/V
Gain Error
V
O
=
14V, G = 5
0.02
0.1
T
0.18
%
vs Temperature
G = 5
2
10
T
T
ppm/
C
Gain Error
V
O
=
12V, G = 100
0.2
0.5
T
1
%
vs Temperature
G = 100
25
100
T
T
ppm/
C
Nonlinearity
G = 100, V
O
=
14V
0.002
0.012
T
T
%
NOISE
Voltage Noise, f = 1kHz
35
T
nV/
Hz
f = 100Hz
35
T
nV/
Hz
f = 10Hz
45
T
nV/
Hz
f
B
= 0.1Hz to 10Hz
0.7
T
Vp-p
Current Noise, f = 1kHz
60
T
fA/
Hz
f
B
= 0.1Hz to 10Hz
2
T
pAp-p
OUTPUT
Voltage, Positive
R
L
= 25k
(V+)0.9
(V+)0.75
T
T
V
Negative
R
L
= 25k
(V)+0.95
(V)+0.8
T
T
V
Short-Circuit Current
Short-Circuit to Ground
+10/5
T
mA
Capacitive Load Drive
1000
T
pF
FREQUENCY RESPONSE
Bandwidth, 3dB
G = 5
200
T
kHz
G = 100
9
T
kHz
G = 500
1.8
T
kHz
Slew Rate
V
O
=
10V, G = 5
0.4
T
V/
s
Settling Time, 0.01%
10V Step, G = 5
30
T
s
10V Step, G = 100
160
T
s
10V Step, G = 500
1500
T
s
Overload Recovery
50% Input Overload
4
T
s
POWER SUPPLY
Voltage Range
1.35
15
18
T
T
T
V
Current (per channel)
I
O
= 0
175
200
T
T
A
TEMPERATURE RANGE
Specification Range
40
+85
T
T
C
Operation Range
55
+125
T
T
C
Storage Range
55
+125
T
T
C
Thermal Resistance,
JA
8-Pin DIP
100
T
C/W
SO-8 Surface-Mount
150
T
C/W
MSOP-8 Surface-Mount
200
T
C/W
16-Pin DIP (dual)
80
T
C/W
SO-16 (dual)
100
T
C/W
SSOP-16 (dual)
100
T
C/W
T
Specification same as INA126P, INA126U, INA126E; INA2126P, INA2126U, INA2126E.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
3
INA126, INA2126
PIN CONFIGURATION (Single)
Top View
8-Pin DIP, SO-8, MSOP-8
PACKAGE INFORMATION
PACKAGE DRAWING
TRANSPORT
PRODUCT
PACKAGE
NUMBER
(1)
PACKAGE MARKING
ORDERING NUMBER
MEDIA
Single
INA126PA
8-Pin DIP
006
INA126PA
INA126PA
Rails
INA126P
8-Pin DIP
006
INA126P
INA126P
Rails
INA126UA
SO-8
182
INA126UA
INA126UA
Rails or Reel
INA126U
SO-8
182
INA126U
INA126U
Rails or Reel
INA126EA
(2)
MSOP-8
337
A26
(3)
INA126EA-250
Reel Only
"
"
"
"
INA126EA-2500
"
INA126E
(2)
MSOP-8
337
A26
(3)
INA126E-250
Reel Only
"
"
"
"
INA126E-2500
"
Dual
INA2126PA
16-Pin DIP
180
INA2126PA
INA2126PA
Rails
INA2126P
16-Pin DIP
180
INA2126P
INA2126P
Rails
INA2126UA
SO-16
265
INA2126UA
INA2126UA
Rails
INA2126U
SO-16
265
INA2126U
INA2126U
Rails
INA2126EA
(2)
SSOP-16
322
INA2126EA
INA2126EA-250
Reel Only
"
"
"
"
INA2126EA-2500
"
INA2126E
(2)
SSOP-16
322
INA2126E
INA2126E-250
Reel Only
"
"
"
"
INA2126E-2500
"
NOTES: (1) For detailed drawing and dimension table, see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) MSOP-8 and SSOP-16 packages are
available only on 250 or 2500 piece reels. (3) Grade designation is marked on reel.
R
G
V
IN
V
+
IN
V
R
G
V+
V
O
Ref
1
2
3
4
8
7
6
5
PIN CONFIGURATION (Dual)
Top View
16-Pin DIP, SO-16, SSOP-16
V
INA
V
INA
R
GA
R
GA
V
INB
V
INB
R
GB
R
GB
1
2
3
4
Ref
A
V
OA
Sense
A
V
5
6
7
8
16
15
14
13
Ref
B
V
OB
Sense
B
V+
12
11
10
9
+
+
Power Supply Voltage, V+ to V ........................................................ 36V
Input Signal Voltage
(2)
........................................... (V)0.7 to (V+)+0.7V
Input Signal Current
(2)
...................................................................... 10mA
Output Short Circuit ................................................................. Continuous
Operating Temperature ................................................. 55
C to +125
C
Storage Temperature ..................................................... 55
C to +125
C
Lead Temperature (soldering, 10s) ............................................... +300
C
NOTES: (1) Stresses above these ratings may cause permanent damage.
(2) Input signal voltage is limited by internal diodes connected to power
supplies. See text.
ABSOLUTE MAXIMUM RATINGS
(1)
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate precautions. Failure to observe proper handling and
installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
4
INA126, INA2126
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C and V
S
=
15V, unless otherwise noted.
GAIN vs FREQUENCY
70
60
50
40
30
20
10
0
10
Gain (dB)
Frequency (Hz)
100
1k
10k
100k
1M
G = 1000
G = 100
G = 20
G = 5
COMMON-MODE REJECTION vs FREQUENCY
110
100
90
80
70
60
50
40
30
20
10
0
Common-Mode Rejection (dB)
Frequency (Hz)
10
100
1k
10k
100k
1M
G = 1000
G = 100
G = 5
POSITIVE POWER SUPPLY REJECTION
vs FREQUENCY
120
100
80
60
40
20
0
Power Supply Rejection (dB)
Frequency (Hz)
10
100
1k
10k
100k
1M
G = 1000
G = 100
G = 5
NEGATIVE POWER SUPPLY REJECTION
vs FREQUENCY
120
100
80
60
40
20
0
Power Supply Rejection (dB)
Frequency (Hz)
10
100
1k
10k
100k
1M
G = 1000
G = 100
G = 5
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE, V
S
= 15V
Output Voltage (V)
Common-Mode Voltage (V)
15
10
0
5
15
5
15
10
5
0
5
10
15
10
V
D/2
+
+
V
CM
V
O
V
D/2
Ref
15V
+15V
+
Limited by A
2
output swing--see text
Limited by A
2
output swing--see text
INPUT COMMON-MODE VOLTAGE RANGE
vs OUTPUT VOLTAGE, V
S
= 5V
Output Voltage (V)
Input Common-Mode Voltage (V)
5
4
5
3
2
1
0
1
2
3
4
5
4
3
2
1
0
1
2
3
4
5
Limited by A
2
output swing--see text
Limited by A
2
output swing--see text
V
S
= 5V
V
S
= +5V/0V
V
REF
= 2.5V
5
INA126, INA2126
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C and V
S
=
15V, unless otherwise noted.
SETTLING TIME vs GAIN
Gain (V/V)
Settling Time (s)
1000
100
10
1
10
100
1k
0.01%
0.1%
INPUT-REFERRED OFFSET VOLTAGE WARM-UP
Time After Turn-On (ms)
Offset Voltage Change (V)
0
1
10
2
3
4
5
6
7
8
9
10
8
6
4
2
0
2
4
6
8
10
(Noise)
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
Frequency (Hz)
THD+N (%)
10
100
1k
1
0.1
0.01
0.001
10k
R
L
= 100k
G = 5
R
L
= 10k
OUTPUT VOLTAGE SWING
vs OUTPUT CURRENT
0
1
2
3
4
5
Output Current (mA)
Output Voltage (V)
Sourcing Current
Sinking Current
V+
(V+)1
(V+)2
(V)+2
(V)+1
V
INPUT-REFERRED NOISE vs FREQUENCY
100
10
1
1k
100
10
Input Voltage Noise (nV/
Hz)
Frequency (Hz)
1
10
100
10k
1k
Input Current Noise (fA/
Hz)
Voltage Noise
Current Noise
QUIESCENT CURRENT AND SLEW RATE
vs TEMPERATURE
Temperature (C)
Quiescent Current (A)
Slew Rate (V/s)
300
250
200
150
100
50
0
0.6
0.5
0.4
0.3
0.2
0.1
0
75
50
25
0
25
50
75
100
125
+SR
SR
V
S
= 5V
V
S
= 1.35V
I
Q
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