Is AD829 and AD811 electrically compatible with NE5534? - diyAudio
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Old 16th March 2012, 05:17 AM   #1
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Default Is AD829 and AD811 electrically compatible with NE5534?

Can I swap the a NE5534 by AD811 or AD829?

AD811 is a current feedback op-amp, so I reckon it's not compatible with NE5534, ist that right?

Are the above mentioned op-amps good for DAC output?
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Old 16th March 2012, 06:18 AM   #2
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Quote:
Originally Posted by Audio Maniac View Post
Can I swap the a NE5534 by AD811 or AD829?

AD811 is a current feedback op-amp, so I reckon it's not compatible with NE5534, ist that right?

Are the above mentioned op-amps good for DAC output?
See my blog http://my.opera.com/opamp particularly for detail of op amp power supplies.

AD811 data sheet states:The AD811 is a wideband current-feedback operational amplifier, optimized for broadcast quality video systems. The -3 dB bandwidth of 120 MHz at a gain of +2 and differential gain and phase of 0.01% and 0.01 (RL = 150 W) make the AD811 an excellent choice for all video systems.

although its pin out is standard single op amp, it does have application as a dac buffer see:
AD811 | High Performance Video Op Amp | Operational Amplifiers (Op Amps) | All Operational Amplifiers | Analog Devices,

probably the better choice of these two, whereas;

AD829 has Pin 1 and 8 for offset Null and Pin 5 as compensation, page 8 and 9 provide information regarding stability detailing where and why compensation is needed .
AD829 | High Speed, Low Noise Video Op Amp | Military/Aerospace | Other Products | Analog Devices
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Old 16th March 2012, 11:43 AM   #3
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AD829 is what can be used. It is fast, but it does not like poor decoupled power rails and requires some capacitors in the feedback loop. You need to check that, or it will oscillate.
Also, if at 2 kohm output impedance it has THD of -104dB, once you lower that impedance to 500 ohm you are at THD -85dB, at 250 ohm you have THD some -50dB...
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