Rainbow Electronics MAX534 - Manual (Page 14)

MAX534
+5V, Low-Power, 8-Bit Quad DAC
with Rail-to-Rail Output Buffers
14 ______________________________________________________________________________________
_________________________________________________________Functional Diagram
MAX534
OUTA
DAC A
DAC B
DAC C
DAC D
REF
DAC
REGISTER A
DECODE
CONTROL
INPUT
REGISTER A
DAC
REGISTER B
INPUT
REGISTER B
DAC
REGISTER C
INPUT
REGISTER C
DAC
REGISTER D
INPUT
REGISTER D
12-BIT
SHIFT
REGISTER
SR
CONTROL
CS DIN SCLK
OUTB
OUTC
OUTD
DOUT LDAC CLR V DD PDE DGND AGND UPO
Table 2. Unipolar Code Table
1
Note: 1LSB = (V
REF
) (2 -8 ) = +V
REF
(
––––
)
256
1
+V
REF
(
––––
)
256
0 0 0 1 0 0 0 0
0V 0 0 0 0 0 0 0 0
127
+V
REF
(
––––
)
256
1 1 1 1 0 1 1 1
128 V REF
+V REF
(
––––
)
= + ––––
256 2
0 0 0 0 1 0 0 0
129
+V
REF
(
––––
)
256
0 0 0 1 1 0 0 0
255
+V
REF
(
––––
)
256
1 1 1 1 1 1 1 1
ANALOG
OUTPUT
LSB MSB
DAC CONTENTS