I need to drive 8Ohms speaker from the output of a PGA2311.
The datasheet for PGA2311 mentions that it can directly drive a load of 600Ohms.
Can i use a series resistor to match up with the load ? (would that be a right approach)
Or would it be better to build some unity gain audio buffer to drive the 8Ohms headphone speakers ?
The output of PGA2311 is a zero-crossing one (no DC offset).
LM380 and LM386 have a fixed internal gain, which is undesirable for my application.
Also, I'd like to use a dual rail supply OPAMP instead of a single rail supply to elimitae the bypass capacitors which create a click and pop when i turn the signal on/off.
The datasheet for PGA2311 mentions that it can directly drive a load of 600Ohms.
Can i use a series resistor to match up with the load ? (would that be a right approach)
Or would it be better to build some unity gain audio buffer to drive the 8Ohms headphone speakers ?
The output of PGA2311 is a zero-crossing one (no DC offset).
LM380 and LM386 have a fixed internal gain, which is undesirable for my application.
Also, I'd like to use a dual rail supply OPAMP instead of a single rail supply to elimitae the bypass capacitors which create a click and pop when i turn the signal on/off.
PGA2311 works with +/-5 Volts and, according to the datasheet, it will deliver +/-3.75V on its output.
If a buffer (no voltage gain) is to be used to drive a pure ohmic 8Ω load then the buffer should be capable of delivering something less than 0.47A and an average power of 880mW.
If that works for you then go ahead, but if you need more power then you must consider using a power amplifier and not just a voltage buffer.
BUF634 is not capable to deliver that much current, because 550mA is what it takes to activate its internal short circuit protection and not a sustained output current which is about 250mA.
If a buffer (no voltage gain) is to be used to drive a pure ohmic 8Ω load then the buffer should be capable of delivering something less than 0.47A and an average power of 880mW.
If that works for you then go ahead, but if you need more power then you must consider using a power amplifier and not just a voltage buffer.
BUF634 is not capable to deliver that much current, because 550mA is what it takes to activate its internal short circuit protection and not a sustained output current which is about 250mA.
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