Audio Line Receiver using INA134

Rajkumar Sharma
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SKU: EL121261
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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.	MANUFACTURER	SUPPLIER	PART NO
1	1	CN1	3 PIN SCREW TERMINAL PITCH 5.08MM	PHOENIX	DIGIKEY	277-1248-ND
2	1	CN2	3 PIN SCREW TERMINAL PITCH 5.08MM	PHOENIX	DIGIKEY	277-1248-ND
3	1	CN3	6 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5319-ND
4	2	C1,C5	10uF/20V SMD TANTLUM SIZE 1210/1411	KYOCERA	DIGIKEY	478-12567-1-ND
5	2	C2,C6	0.1uF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
6	3	C3,C4,C7	470PF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
7	1	D1	LED 3MM THT	AMERICAN OPTO	DIGIKEY	2460-L314GT-ND
8	1	R1	49.9E 1% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
9	1	R2	1.5K 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
10	1	U1	INA134 SOIC8	TI	DIGIKEY	INA134UA-ND
CAPACITOR C1, C5	CAN BE REPLACED WITH	10uF/25V	ELECTROLYTIC CAPACITOR