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DIGITAL TO ANALOG CONVERSION (DAC)&ANALOG TO DIGITAL CONVERSION (ADC)
Rusminto Tjatur Widodo
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
DIGITAL TO ANALOG CONVERSION (DAC)
Rusminto Tjatur Widodo
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
To control physical variable
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
1. Summing Amplifier
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
Vout
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
2. R/2R Ladder
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
Misalkan input biner DAC = 1100, maka Vo
N= Jumlah Bitn= bit yang ke-n
1. DAC seperti pada gambar di atas (R/2R Ladder 4 bit) mempunyai Vref = 5V, Berapakah
a. Resolusi dari DAC
b. Tegangan skala penuh DAC
2. Jika DAC R/2R mempunyai input 8 bit, berapakah
a. Resolusi dari DAC
b. Tegangan skala penuh DAC
c. Jika ingin didapatkan Vo=1 V, berapakah input digital yang harus diberikan? 0001 1010 (26)dec
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Tugas
a. Rancanglah DAC dengan summing amplifier 8 bit, dengan ketentuan resolusi yang dihasilkan adalah 0.1 V,
b. hitunglah tegangan pada skala penuhnya.
c. Berapakah tegangan outputnya jika input digitalnya adalah ADh.
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
ANALOG TO DIGITAL CONVERSION (ADC)
Rusminto Tjatur Widodo
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
ADC (Analog to Digital Conversion)
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
1. DIGITAL RAMP
tc = jmlh step x TT = 1/fSource: Digital Systems, Principle and Applications, 9th Edition,
Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
1. ADC – Digital Ramp
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
ADC 10 bit, mempunyai f clock = 1 Mhz, VT = 1 mV, DAC mempunyai VFS= 10,23 V dan input 10 bit.
a. Nilai Digital yang dihasilkan jika VA=3,728 V
b. Waktu konversi yang diperlukan (tc)c. Berapakah perkiraan input analognya
jika output digitalnya 01011 10101
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
ADC mempunyai f clock = 2 Mhz, VT = 1 mV, DAC mempunyai teg. Full-scale VFS= 15 V dan input 8bit.
a. Nilai Digital (dalam biner) yang dihasilkan jika VA=7,581 V
b. Waktu konversi yang diperlukan (tC)
c. Berapakah perkiraan input analognya jika output digitalnya BCh
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
2. SUCCESSIVE APPROXIMATION ADC (SAC)
tC = jmlh bit x TT = 1/f
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
TugasJelaskan cara kerja ADC SAC
2. Successive Approximation
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Sebuah ADC tipe SAC 8 bit mempunyai resolusi 20 mV.
a. Hitunglah output digitalnya jika diberi input analog 2,17 V. [108 desimal = 0110 1100]
b. Hitunglah waktu conversi (tc) jika f clock= 1Mhz. [untuk SAC, tC = N x 1cycle clock. Jadi tC = 8 micro secon]
c. Berapa kali lebih cepat waktu konversi ADC tipe SAC ini Jika menggunakan ADC Digital Ramp
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice
Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
3. ADC- Flash
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
Source: Digital Systems, Principle and Applications, 9th Edition, Ronald J. Tocci, Neal S. Widmer and Gregory L. Moss, Prentice Hall, 2004
