Audio Line Receiver using INA134

The project described here is a differential line receiver consisting of high-performance INA134 OPAMPs with on-chip precision resistors. The project is fully specified for high-performance audio applications and has excellent AC specifications, including low distortion (0.0005% at 1kHz) and high slew rate (14V/µs), assuring good dynamic response. In addition, wide output voltage swing and high output drive capability allow use in a wide variety of demanding applications. The INA134 on-chip resistors are laser trimmed for accurate gain and optimum common-mode rejection. Furthermore, excellent TCR tracking of the resistors maintains gain accuracy and common-mode rejection over temperature. Operating power supply ±4V to ±18V (8V to 36V total supply).

This project is used in combination with the DRV135 Audio-Balanced Line Driver as the transmitter. Together they offer a complete solution for transmitting analog audio signals without degradation over a long distance.

Features

• Power Supply +/-12V (SUPPLY RANGE: ±4V to ±18V)
• Low Distrortion: 0.0005% at f = 1kHz
• High Slew Rate: 14V/µs
• Fast Settling Time: 3µs to 0.01%
• Low Quiescent Current: 2.9mA max
• High CMRR: 90dB
• Fixed Gain= 0dB (1V/V)
• PCB Dimensions 39.37 x 360.48 mm

Applications

• Audio Differential Line Drivers
• Audio Mix Consoles
• Distribution Amplifier
• Digital Effects Processors
• Hi-Fi Equipment’s

Schematic

Parts List

Connections

Application Diagram

Transmitter/Receiver Diagram

Gerber View

Photos

Video

INA134 Datasheet

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