INA103
Low Noise, Low Distortion
INSTRUMENTATION AMPLIFIER
DESCRIPTION
The INA103 is a very low noise, low distortion monolithic 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 performance for 200W source impedances. Many industrial applications also benefit from its low noise and wide bandwidth. Unique distortion cancellation circuitry reduces distortion 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. 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. The INA103 is available in 16-pin plastic DIP and SOL-16 surface-mount packages. Commercial and Industrial temperature range models are available.
FEATURES
l LOW NOISE: 1nV/ÖHz
l LOW THD+N: 0.0009% at 1kHz, G = 100
l HIGH GBW: 100MHz at G = 1000
l WIDE SUPPLY RANGE: ±9V to ±25V
l HIGH CMRR: >100dB
l BUILT-IN GAIN SETTING RESISTORS:G = 1, 100
l UPGRADES AD625
APPLICATIONS
l HIGH QUALITY MICROPHONE PREAMPS (REPLACES TRANSFORMERS)
l MOVING-COIL PREAMPLIFIERS
l DIFFERENTIAL RECEIVERS
l AMPLIFICATION OF SIGNALS FROM: Strain Gages (Weigh Scale Applications) Thermocouples Bridge Transducers