Philips CD 960

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
poynton

poynton

Member
Joined 2005
@lf said:
I have Philips CD 960 with four JRC5534 op-amps in output stage. In Philips CD960 tech doc NJM5534 :bigeyes:

Any direct replacements for this JRC5534 op-amps?


Thanks for advice.
Click to expand...

Hi.

Almost any of the better dual opamps will replace the 5534 directly or you could try opa627's on browndog converters.

However, there is a new kid on the block in the form of National Semiconductor's LM4562 which seems to be even better !! Try to get some on the sample program.

Andy
 
FastEddy

FastEddy

Member
Joined 2006
4ourbees.com
Unless the Google lied: the slew rate and noise rejection of the AD825 is a whole lot better ==> ~10X better.

( 825: http://www.analog.com/en/prod/0,,759_786_AD825,00.html )
( 5534: http://www.njr.co.jp/pdf/ae/ae04059.pdf )

Pin out & voltage requirements are the same / same.

AD825:
-3dB Bandwidth 46MHz
Slew Rate 140V/µs (??)
Vos 1mV
Ib 10pA
Input Noise (nV/rtHz) 12nV/rtHz
Vcc-Vee Supply (V) 10 to 36
Iq per Amplifier (max) 7.2mA
# OpAmps per Pkg 1
Operating Temp Range -40 to +85
Packages SOIC
...
41 MHz, -3 dB bandwidth
125 V/µs slew rate (??)
80 ns settling time
Input bias current of 20 pA and noise
current of 10 fA/√Hz
Fully specified power supplies: ±5 V to ±15V
Input voltage noise of 12 nV/√Hz
Low distortion: -76 dB at 1 MHz
High output drive capability
Drives unlimited capacitance load
50 mA min output current
No phase reversal when input is
at rail
........

JRC5534 / NJM5534:
Operating Voltage ( ±3V~±22V )
Single Circuit
With VIO Trim Terminal
Low Input Noise Voltage ( 3.3nV/?Hz typ.@ 1kHz )
Power Bandwidth ( 200kHz typ. )
Slew Rate ( 13V/?s typ. )
Package Outline DIP8,DMP8
Bipolar Technology ...
Input Offset Voltage VIO RS?10k? - 0.5 4 mV
Input Offset Current IIO - 20 300 nA
Input Bias Current IB - 500 1500 nA
Input Resistance RIN 30 100 - k?
Large Signal Voltage Gain AV RL?2k?,VO=±10V 88 100 - dB
Maximum Output Voltage Swing VOM RL?600? ± 12 ± 13 - V
Input Common Mode Voltage Range VICM ± 12 ± 13 - V
Common Mode Rejection Ratio CMR RS?10k? 70 100 - dB
Supply Voltage Rejection Ratio SVR RS?10k? 80 100 - dB
Operating Current ICC RL=? - 4 8 mA
Transient Response Rise Time tR VIN=50mV,RL=600?,CL=100pF,Cc=22pF - 35 - nsec
Overshoot VIN=50mV,RL=600?,CL=100pF,Cc=22pF - 17 - %
Slew Rate SR Cc=0 - 13 - V/?s
Gain Bandwidth Product GB Cc=22pF,CL=100pF - 10 - MHz
Power Bandwidth WPG Vo=20VP-P,Cc=0 - 200 - kHz
Equivalent Input Noise Voltage VNI f=20Hz~20kHz - 1.0 - ?Vrms
Equivalent Input Noise Current INI f=20Hz~20kHz - 25 - pArms
Equivalent Input Noise Voltage 1 en1 fO=30Hz - 5.5 - nV/?Hz
Equivalent Input Noise Voltage 2 en2 fO=1kHz - 3.3 - nV/?Hz
Equivalent Input Noise Current 1 in1 fO=30Hz - 1.5 - pA/?Hz
Equivalent Input Noise Current 2 in2 fO=1kHz - 0.4 - pA/?Hz
Broadband Noise Figure NF f=10Hz~20kHz,RS=5k? - 0.9 - dB
 
FastEddy

FastEddy

Member
Joined 2006
4ourbees.com
Other advise?? If you got 'em, use 'em ... the '825 that is ... or something equal. (The pin connections are the same for a whole range of "standard" Op-Amps = :) )

It might be difficult to tell the audio output differences without instruments, as there are certainly other components around the Op-Amp that are more important to audio quality than the band width & slew rate of the Op-Amps ... but you might see some interesting improvements in quality.

You might also explore cleaning up and clarifying the power supply ... like adding some plasic snubbing caps, etc. = DIY common practices rule.
 
G

Guido Tent

Member
Joined 2001
TentLabs.com
FastEddy said:
Other advise?? If you got 'em, use 'em ... the '825 that is ... or something equal. (The pin connections are the same for a whole range of "standard" Op-Amps = :) )

It might be difficult to tell the audio output differences without instruments, as there are certainly other components around the Op-Amp that are more important to audio quality than the band width & slew rate of the Op-Amps ... but you might see some interesting improvements in quality.

You might also explore cleaning up and clarifying the power supply ... like adding some plasic snubbing caps, etc. = DIY common practices rule.
Click to expand...

if you don't want to spend a fortune, try OPA 134 (single) or OPA2134 (dual). Within their price range these are the best you can get.

best
 
@

@lf

Member
Joined 2003
OK. Soldered four AD825 opamps in two hours :magnify:
CD960 has new opamps and play... Sound is good... :drink:
 

Attachments

  • ad825_3.jpg
    ad825_3.jpg
    16 KB · Views: 433
FastEddy

FastEddy

Member
Joined 2006
4ourbees.com
" ... any info where I can find OPA 134 in Europe? ..."

From the TI web site @ http://focus.ti.com/docs/prod/folders/print/opa134.html :

Samples: http://www.arrowne.com/ ... http://www.silica.com/ ... http://www.ebv.com/ ... http://www.farnellinone.com/ ... http://www.rutronik.com/ ...

All of these are distributors of TI parts in Europe. It might be a good idea to "subscribe" to the TI news letters so you can get "registered" and the have access to direct communications with the outfits. (That's what I do here in North America for samples from TI, National, Analog Devices, etc ... establish a relationship with a "big name" distributor ... they love shipping samples and evaluation boards, etc., sometimes are a very reasonable price, sometimes for free :D
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom