®
INA103
INA103
INA103
Low Noise, Low Distortion
INSTRUMENTATION AMPLIFIER
FEATURES
APPLICATIONS
● LOW NOISE: 1nV/√Hz
● HIGH QUALITY MICROPHONE PREAMPS
(REPLACES TRANSFORMERS)
● LOW THD+N: 0.0009% at 1kHz, G = 100
● HIGH GBW: 100MHz at G = 1000
● WIDE SUPPLY RANGE: ±9V to ±25V
● HIGH CMRR: >100dB
● MOVING-COIL PREAMPLIFIERS
● DIFFERENTIAL RECEIVERS
● AMPLIFICATION OF SIGNALS FROM:
Strain Gages (Weigh Scale Applications)
Thermocouples
● BUILT-IN GAIN SETTING RESISTORS:
G = 1, 100
Bridge Transducers
● UPGRADES AD625
The INA103 is available in 16-pin plastic DIP and
SOL-16 surface-mount packages. Commercial and In-
dustrial temperature range models are available.
DESCRIPTION
The INA103 is a very low noise, low distortion mono-
lithic instrumentation amplifier. Its current-feedback
circuitry achieves very wide bandwidth and excellent
dynamic response. It is ideal for low-level audio
signals such as balanced low-impedance microphones.
The INA103 provides near-theoretical limit noise per-
formance for 200Ω source impedances. Many indus-
trial applications also benefit from its low noise and
wide bandwidth.
Offset Offset
–Gain Drive Null
Null
12
3
4
6kΩ
6kΩ
+
–
–Input
16
15
A1
3kΩ
11
Sense
Output
Ref
–Gain Sense
Unique distortion cancellation circuitry reduces dis-
tortion to extremely low levels, even in high gain. Its
balanced input, low noise and low distortion provide
superior performance compared to transformer-coupled
microphone amplifiers used in professional audio
equipment.
–RG 13
–
+
60.6Ω
3kΩ
A3
10
7
14
6
G = 100
+RG
6kΩ
6kΩ
–
2
+Gain Sense
+Input
A2
+
1
The INA103’s wide supply voltage (±9 to ±25V) and
high output current drive allow its use in high-level
audio stages as well. A copper lead frame in the plastic
DIP assures excellent thermal performance.
5
+Gain Drive
9
8
V+
V–
International Airport Industrial Park
•
Mailing Address: PO Box 11400, Tucson, AZ 85734
FAXLine: (800) 548-6133 (US/Canada Only)
•
Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706
•
Tel: (520) 746-1111
•
Twx: 910-952-1111
Internet: http://www.burr-brown.com/
•
•
Cable: BBRCORP
•
Telex: 066-6491
•
FAX: (520) 889-1510
•
Immediate Product Info: (800) 548-6132
®
©1990 Burr-Brown Corporation
PDS-1016H
Printed in U.S.A. March, 1998
INA103
1
SBOS003