®
INA104
Very-High Accuracy
INSTRUMENTATION AMPLIFIER
DESCRIPTION
FEATURES
The INA104 is a high accuracy, multistage, inte-
grated-circuit instrumentation amplifier designed for
signal conditioning requirements where very high per-
formance is desired.
● VERSATILE FOUR OP AMP DESIGN
● ULTRA-LOW VOLTAGE DRIFT:
0.25µV/°C, max
● LOW OFFSET VOLTAGE: 25µV, max
● LOW NONLINEARITY: 0.002%, max
● LOW NOISE: 13nV/√Hz at f0 = 1kHz
● HIGH CMR: 106dB at 60Hz, min
● HIGH INPUT IMPEDANCE: 1010Ω
● LOW COST
A multiamplifier, monolithic design, which uses Burr-
Brown’s ultra-low drift, low-noise technology, pro-
vides the highest performance with maximum versatil-
ity at the lowest cost and makes the INA104 ideal for
even high volume applications.
Burr-Brown’s compatible thin-film resistors and laser-
trimming techniques are used for minimizing offset
voltage and temperature drift. This advanced tech-
nique also maximizes common-mode rejection and
gain accuracy.
APPLICATIONS
● AMPLIFICATION OF SIGNALS FROM
SOURCES SUCH AS:
Strain Gages
The INA104 also contains a fourth operational ampli-
fier, specified separately, which can conveniently be
used for some important applications such as single
capacitor active low-pass filtering, easy output level
shifting, common-mode voltage active guard drive,
and increased gain (x 10,000 and greater).
Thermocouples
RTDs
● REMOTE TRANSDUCER AMPLIFIER
● LOW LEVEL SIGNAL CONDITIONER
● MEDICAL INSTRUMENTATION
A3
A4
Output Inverting Input
8
9
20kΩ
14
Gain
12
11
A4 Summing
Junction
18
Gain Sense
–In
10kΩ
26kΩ
10kΩ
10kΩ
10kΩ
Feedback
Resistor
A1
17
4
5
CMV Sense
Gain
10
A3
A4
A4 Output
26kΩ
10kΩ
20kΩ
1
2
Gain Sense
+In
10kΩ
5kΩ
A2
16
15
13
+VCC
3
6
7
Offset
Adjust
Offset
Adjust
–VCC Common
A4
Non-Inverting Input
International Airport Industrial Park
•
Mailing Address: PO Box 11400
Cable: BBRCORP
•
Tucson, AZ 85734
•
Street Address: 6730 S. Tucson Blvd.
• Tucson, AZ 85706
Tel: (520) 746-1111 Twx: 910-952-1111
•
•
•
Telex: 066-6491
•
FAX: (520) 889-1510
•
Immediate Product Info: (800) 548-6132
©1983 Burr-Brown Corporation
PDS-488D
Printed in U.S.A. May, 1995