Other Parts Discussed in Thread: BUF634
Hi all,
I'm designing a compact headphone amp. I'm planning on using the LMH6321 buffer in the virtual ground circuit. However, I'm confused as the LMH6321 itself has a GND connection. According to the datasheet: "this pin must be set to a voltage of one V_BE (∼0.7V) or greater, or more commonly, mid rail, by a stiff, low impedance source. This precludes applying a resistive voltage divider to the GND pin for this purpose." But the only reference to GND in the datasheet is for the Current Limit function and "if the V_CL pin is left open, the output short circuit current will default to about 700mA." So perhaps the GND can also be left open i this case? Or should it be connected to the input or output of this circuit?
I'm using this curcuit but with a LMH6321 instead of the BUF634: 
/Per
Hi all,
I'm designing a compact headphone amp. I'm planning on using the LMH6321 buffer in the virtual ground circuit. However, I'm confused as the LMH6321 itself has a GND connection. According to the datasheet: "this pin must be set to a voltage of one V_BE (∼0.7V) or greater, or more commonly, mid rail, by a stiff, low impedance source. This precludes applying a resistive voltage divider to the GND pin for this purpose." But the only reference to GND in the datasheet is for the Current Limit function and "if the V_CL pin is left open, the output short circuit current will default to about 700mA." So perhaps the GND can also be left open i this case? Or should it be connected to the input or output of this circuit?
Hi all,
I'm designing a compact headphone amp. I'm planning on using the LMH6321 buffer in the virtual ground circuit. However, I'm confused as the LMH6321 itself has a GND connection. According to the datasheet: "this pin must be set to a voltage of one V_BE (∼0.7V) or greater, or more commonly, mid rail, by a stiff, low impedance source. This precludes applying a resistive voltage divider to the GND pin for this purpose." But the only reference to GND in the datasheet is for the Current Limit function and "if the V_CL pin is left open, the output short circuit current will default to about 700mA." So perhaps the GND can also be left open i this case? Or should it be connected to the input or output of this circuit?
Hi all,
I'm designing a compact headphone amp. I'm planning on using the LMH6321 buffer in the virtual ground circuit. However, I'm confused as the LMH6321 itself has a GND connection. According to the datasheet: "this pin must be set to a voltage of one V_BE (∼0.7V) or greater, or more commonly, mid rail, by a stiff, low impedance source. This precludes applying a resistive voltage divider to the GND pin for this purpose." But the only reference to GND in the datasheet is for the Current Limit function and "if the V_CL pin is left open, the output short circuit current will default to about 700mA." So perhaps the GND can also be left open i this case? Or should it be connected to the input or output of this circui
Hi all,
I'm designing a compact headphone amp. I'm planning on using the LMH6321 buffer in the virtual ground circuit. However, I'm confused as the LMH6321 itself has a GND connection. According to the datasheet: "this pin must be set to a voltage of one V_BE (∼0.7V) or greater, or more commonly, mid rail, by a stiff, low impedance source. This precludes applying a resistive voltage divider to the GND pin for this purpose." But the only reference to GND in the datasheet is for the Current Limit function and "if the V_CL pin is left open, the output short circuit current will default to about 700mA." So perhaps the GND can also be left open i this case? Or should it be connected to the input or output of this circuit?
Hi all,
I'm designing a compact headphone amp. I'm planning on using the LMH6321 buffer in the virtual ground circuit. However, I'm confused as the LMH6321 itself has a GND connection. According to the datasheet: "this pin must be set to a voltage of one V_BE (∼0.7V) or greater, or more commonly, mid rail, by a stiff, low impedance source. This precludes applying a resistive voltage divider to the GND pin for this purpose." But the only reference to GND in the datasheet is for the Current Limit function and "if the V_CL pin is left open, the output short circuit current will default to about 700mA." So perhaps the GND can also be left open i this case? Or should it be connected to the input or output of this circuit?
