MAX533ACEE MAXIM [Maxim Integrated Products], MAX533ACEE Datasheet - Page 14

• Manufacturer Part Number: MAX533ACEE
• Description: 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers
• Manufacturer: MAXIM [Maxim Integrated Products]

The voltage applied to REF should not exceed V
any time. If proper power sequencing is not possible,
connect an external Schottky diode between REF and
V
ratings. Do not apply signals to the digital inputs before
the device is fully powered up.
Connect AGND and DGND together at the IC. This
ground should then return to the highest-quality ground
available. Bypass V
as close to V
Careful PC board layout minimizes crosstalk among
DAC outputs and digital inputs. Figure 10 shows sug-
gested circuit board layout to minimize crosstalk.
In unipolar operation, the output voltages and the refer-
ence input are the same polarity. Figure 11 shows the
MAX533 unipolar configuration, and Table 2 shows the
unipolar code.
2.7V, Low-Power, 8-Bit Quad DAC
with Rail-to-Rail Output Buffers
Figure 8. DAC Simplified Circuit Diagram
14
D7
D6
D5
D4
DD
______________________________________________________________________________________
to ensure compliance with the absolute maximum
DAC A
REF
DD
R0
and DGND as possible.
Two-Quadrant Multiplication
DD
and Ground Management
with a 0.1µF capacitor, located
Power-Supply Bypassing
D3
R1
LSB DECODER
Power Sequencing
D2
Unipolar-Output,
D1
D0
R255
R16
R15
DD
at
Figure 9. Effect of Negative Offset (Single Supply)
Table 2. Unipolar Code Table
Note: 1LSB = (V
1 1 1 1
1 0 0 0
1 0 0 0
0 1 1 1
0 0 0 0
0 0 0 0
MSB
NEGATIVE
DAC CONTENTS
OFFSET
VOLTAGE
OUTPUT
0V
REF
1 1 1 1
0 0 0 1
0 0 0 0
1 1 1 1
0 0 0 1
0 0 0 0
) (2
LSB
-8
) = +V
DAC CODE
REF
+V
REF
(
+V
+V
+V
+V
––––
256
1
ANALOG
OUTPUT
(
REF
REF
REF
REF
––––
256
128
)
0V
(
(
(
(
––––
––––
)
––––
––––
255
256
129
256
256
256
127
1
= + –
)
)
)
)
V
REF
2
–––