Voltage_output_DAC

Published:2009/7/24 11:19:00 Author:Jessie | From:SeekIC

In this circuit, an MX7524 8-bit current output DAC is connected in an inverted configuration (voltage mode) by driving the IOUT pin with a 1.23-V reference (ICL8069). The DAC output drives a MAX480 where the gain is set so that full-scale output is 4 V. The power consumption is below 1 mW (operating) and much less shut down. The circuit operates when the On/Off input is at 5 V. When On/Off is at 0 V, supply current falls to 15μA, and the amplifier output falls to 0 V. The DAC input data can be retained if the WR input is used. Digital input lines must be driven with CMOS logic levels (rail-to-rail) to minimize supply current. Maxim, 1992,Appications and Product Highlights, p. 8-15.



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