The DACAMP amplifies and level shifts the output voltage of four DAC outputs. The resulting bipolar outputs are adjustable up to ± 10 Volts. The amplified outputs can drive a 10k Ohm resistance. Output voltages greater than ± 7 Volts require an external power supply.
The following example presumes that you are using a VAIO12 board.
1. Connect the DACAMP analog input (AIN) connector to a Vesta VAIO12 or VAIO8 analog output connector. This connection supplies the DACAMP with +5 Volts. Your outputs will be limited to approximately ± 7 Volts.
2. Connect a voltmeter to pin 3 of the AOUT connector. You will be using analog channel 0. Don't forget to adjust the reference on the VAIO12 to full scale output.
3. Apply power and execute the following code:
AOUT_CONFIG(0,2) for VAIO12 AOUT_CONFIG(0,1) for VAIO8 AOUT (0,4095) for VAIO12 AOUT(0, 255) for VAIO8
The output of the DAC will go to full scale. Adjust the pot labeled "G0" to the desired positive full scale output voltage. Writing a 0 to the DAC will result in an output voltage of negative full scale. Writing full scale / 2 will result in 0 volts output.
The four gain adjust pots G0 through G3 adjust the gain of the four channels. A minimum adjustment will result in positive and negative full-scale outputs equal to the input voltage. Maximum gain is approximately 5 times the input voltage.
The DACAMP has an onboard negative voltage converter that supplies positive and negative voltages up to ± 7 Volts (depending on the load). If higher output voltages are required an external power supply may be used.
To connect an external power supply:
pin 1 GND pin 2 +15 pin 3 -15
Dimensions are in inches.