3.01 / 3.02

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3.01 – Settings and Input wiring for current output DAC, stereo, single ended, 1mA full scale current, 0V reference voltage

Known examples of DAC’s requiring these settings are Burr Brown PCM1700 as well as Analog Devices AD 1865.

 

This type of DAC requires the following jumper settings:

 

 

The input connections should follow the Scheme shown underneath:

 

 

All Ground connections and the Vcom connections must be made to the DAC’s Analogue
Ground Pin.

 

3.02 – Settings and Input wiring for current output DAC, stereo, single ended, 2mA full scale current, 0V reference voltage

 

A known example of a DAC requiring these settings is the Philips TDA1541/TDA1541A.

 

This type of DAC requires the following jumper settings:

 

The input connections should follow the Scheme shown underneath:

All Ground connections and the Vcom connections must be made with individual wires to the DAC’s Analogue Ground Pin.

 

The TDA1541(A) is listed in the Datasheet as follows:

 

From this we derive that Pin 5 is “Analogue Ground”, Pin 6 is “Right Channel (Current) Out” and Pin 25 is “Left Channel (Current) Out”.

 

So we need to disconnect all traces from Pin 6 and Pin 25.

 

Then we need to connect Pin 25 to the In L connection on the Universal Tube Output Stage and Pin 6 to the In R connection.

 

The connections from Gnd L, Gnd R, Vcom L and Vcom R on the Universal Tube Output Stage need to be made all to Pin 5 of the TDA1541, preferably using individual wires.