Audio Line Receiver using INA134

  • Rajkumar Sharma
  • 53 Views
  • easy
  • Tested

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

NO.QNTY.REF.DESC.MANUFACTURERSUPPLIERPART NO
11CN13 PIN SCREW TERMINAL PITCH 5.08MMPHOENIXDIGIKEY277-1248-ND
21CN23 PIN SCREW TERMINAL PITCH 5.08MMPHOENIXDIGIKEY277-1248-ND
31CN36 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5319-ND
42C1,C510uF/20V SMD TANTLUM SIZE 1210/1411KYOCERADIGIKEY478-12567-1-ND
52C2,C60.1uF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
63C3,C4,C7470PF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
71D1LED 3MM THTAMERICAN OPTO DIGIKEY2460-L314GT-ND
81R149.9E 1% SMD SIZE 0805MURATA/YAGEODIGIKEY
91R21.5K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
101U1INA134 SOIC8TIDIGIKEYINA134UA-ND
CAPACITOR C1, C5 CAN BE REPLACED WITH10uF/25V ELECTROLYTIC CAPACITOR

Connections

Application Diagram



Transmitter/Receiver Diagram

Gerber View

Photos

Video

INA134 Datasheet

ina134

PCB

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