My DRV134 PCB

Algar_emi · 21st July 2007, 07:27 PM

Since I completed my design, here for some that are interested, my own version of the DRV134 balanced driver PCB. It has these features: dual channels on one two layer PCB with ground plane, power and signal ground are connected at a star point, optional input resistor and low pass filter, +/- 15V supply with input CRC filter, optional external output sense pins. My first prototype has some errors in the power supply section. The following information has the correction implemented and it is working perfectly. Here a view of the PCB.

Algar_emi · 21st July 2007, 07:31 PM

Here the schematic. The current version 1.1 doesn't use D1-D2 diodes on the ground. Please install JP1 jumper and not the diodes if you do this PCB. The diodes were causing the DRV134 to have a 0.53V DC offset at the input and outputs pins.

Algar_emi · 21st July 2007, 07:35 PM

Here the parts list.

Algar_emi · 21st July 2007, 07:42 PM

Here the PCB in hires pdf format. For none commercial use only. This the parts location.

Algar_emi · 21st July 2007, 07:43 PM

The Top layer

Algar_emi · 21st July 2007, 07:44 PM

And the bottom layer.

Algar_emi · 21st July 2007, 07:46 PM

Final result.

Algar_emi · 28th July 2007, 09:09 PM

I tested the pcb today. Pretty impressive this DRV134 chip. Here my results, both left and right channel measured the same. All measurements were done driving a 1K load. The circuit is stable as a rock, no noise or oscillation.

Gain: 6.4dB
BW (1Khz, Ref 1V): 420Khz (My PCB has a 100R, 220pF cap LPF)
Dist 1Khz, 0dBV: 0.0003%, 10Khz: 0.002%
Dist IMD (1K, 2K): 0.005%
All harmonics are in the noise floor , lower than -90dB, ref 0dBV
DC offset (Input in 50R) (R & L Channel):
V+: 3.5mV, 0.3mV V-: -11.5mV, -13.5mV

Not bad at all.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Drv134 Pcb	kestrel200	Chip Amps	7	29th September 2009 07:27 AM
DRV134 power on pop?	Ted205	Chip Amps	1	21st April 2009 01:38 PM
Replace DRV134 with OP-amp	CJ900RR	Chip Amps	10	13th September 2007 06:28 PM
BGT3886nigc plus drv134	digi01	Chip Amps	23	3rd November 2005 07:06 AM
Drv134	Frazzled	Swap Meet	5	26th June 2004 07:53 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

28th July 2007, 09:09 PM	#8
Algar_emi diyAudio Member Join Date: Oct 2002 Location: Canada, Qc	I tested the pcb today. Pretty impressive this DRV134 chip. Here my results, both left and right channel measured the same. All measurements were done driving a 1K load. The circuit is stable as a rock, no noise or oscillation. Gain: 6.4dB BW (1Khz, Ref 1V): 420Khz (My PCB has a 100R, 220pF cap LPF) Dist 1Khz, 0dBV: 0.0003%, 10Khz: 0.002% Dist IMD (1K, 2K): 0.005% All harmonics are in the noise floor , lower than -90dB, ref 0dBV DC offset (Input in 50R) (R & L Channel): V+: 3.5mV, 0.3mV V-: -11.5mV, -13.5mV Not bad at all.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)