# Interfacing a Transducer to an Analog-to-Digital Converter and Interfacing Digital-to-Analog Converters to Loads

1. Watch video Week 5 – Op Amp DAC Circuit (Right click, save as)
2. Design an 8-Bit DAC Circuit – Calculate the values for all resistors
3. Include calculations and schematic in a Word document entitled: “HW5_StudentID”, with your student id substituted in the file name.  Show all work for full credit.

Complete circuit in multisim!

# Interfacing a Transducer to an Analog-to-Digital Converter and Interfacing Digital-to-Analog Converters to Loads

The purpose of this lab is to allow students to gain experience constructing Digital to Analog Converters in Multisim. Students will extend the concepts learned in the module and homework to build an 8-Bit DAC. Several binary inputs and the associated analog output values measured with a virtual digital multimeter will be captured in screenshots.

1. Watch the video Week 5 – Op Amp DAC Circuit
2. Determine the values of all the remaining seven resistors and fill in the table 1.

Table1:

 Resistors Values R1 1k Ω R2 R3 R4 R5 R6 R7 R8
1. Recall the binary to decimal conversion and fill the table below:
 Bits Binary Input Decimal conversion MSB(S1) 1000 0000 S2 S3 S4 S5 S6 S7 LSB(S8) 0000 0001
1. Construct an 8-bit binary weighted DAC in Multisim and measure the output voltage Vout using the multimeter and record the computed gain below.

Table2:

 Bits Binary Input Vin Rn(n = 1,2,3,4,5,6,7,8) RF Output Voltage (Vout) Voltage Gain (Av) MSB(S1) 1000 0000 S2 S3 S4 S5 S6 S7 LSB(S8) 0000 0001
1. Take the screenshots of Vout measurements for the input/output combination for each of the above 8-bits.