A single external resistor sets any gain from 1 to
10,000. INA128 provides an industry standard gain
equation; INA129’s gain equation is compatible with
the AD620.
The INA128/INA129 is laser trimmed for very low
offset voltage (50µV), drift (0.5µV/°C) and high com-
mon-mode rejection (120dB at G
≥
100). It operates
with power supplies as low as
±2.25V,
and quiescent
current is only 700µA—ideal for battery operated
systems. Internal input protection can withstand up to
±40V
without damage.
The INA128/INA129 is available in 8-pin plastic
DIP, and SO-8 surface-mount packages, specified for
the –40°C to +85°C temperature range. The INA128
is also available in dual configuration, the INA2128.
V+
7
INA128:
G=1+
50kΩ
R
G
APPLICATIONS
q
BRIDGE AMPLIFIER
q
THERMOCOUPLE AMPLIFIER
q
RTD SENSOR AMPLIFIER
q
MEDICAL INSTRUMENTATION
q
DATA ACQUISITION
V
IN
–
2
INA128, INA129
Over-Voltage
Protection
A
1
40kΩ
25kΩ
(1)
40kΩ
INA129:
G=1+
6
49.4kΩ
R
G
1
R
G
8
25kΩ
(1)
A
2
40kΩ
4
V–
A
3
V
O
5
40kΩ
+
V
IN
3
Over-Voltage
Protection
Ref
NOTE: (1) INA129: 24.7kΩ
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
NOTE: (1) Input common-mode range varies with output voltage—see typical curves. (2) Guaranteed by wafer test. (3) Temperature coefficient of the 50kΩ (or 49.4kΩ)
term in the gain equation. (4) Nonlinearity measurements in G = 1000 are dominated by noise. Typical nonlinearity is
±0.001%.
PIN CONFIGURATION
8-Pin DIP and SO-8
ELECTROSTATIC
DISCHARGE SENSITIVITY
Top View
8
7
6
5
R
G
V+
V
O
Ref
R
G
V
–IN
V
+IN
V–
1
2
3
4
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.
ORDERING INFORMATION
PACKAGE
DRAWING
NUMBER
(1)
006
006
182
182
006
006
182
182
TEMPERATURE
RANGE
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ..................................................................................
±18V
Analog Input Voltage Range .............................................................
Operating Temperature ................................................. –40°C to +125°C
Storage Temperature ..................................................... –40°C to +125°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
PRODUCT
INA128PA
INA128P
INA128UA
INA128U
INA129PA
INA129P
INA129UA
INA129U
PACKAGE
8-Pin Plastic DIP
8-Pin Plastic DIP
SO-8 Surface-Mount
SO-8 Surface-Mount
8-Pin Plastic DIP
8-Pin Plastic DIP
SO-8 Surface-Mount
SO-8 Surface-Mount
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
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
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