DAC8408FP Analog Devices Inc, DAC8408FP Datasheet - Page 11

IC DAC 8BIT QUAD W/MEMORY 28-DIP

DAC8408FP

Manufacturer Part Number
DAC8408FP
Description
IC DAC 8BIT QUAD W/MEMORY 28-DIP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of DAC8408FP

Rohs Status
RoHS non-compliant
Settling Time
190ns
Number Of Bits
8
Data Interface
Parallel
Number Of Converters
4
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
28-DIP (0.600", 15.24mm)
Power Dissipation (max)
-

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REV. A
DAC Data Input
MSB
1 1 1 1 1 1 1 1
1 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
NOTE
1 LSB = (2
Table II. Bipolar (Offset Binary) Code Table
(Refer to Figure 7)
–7
) (V
REF
LSB
) =
128
1
(V
REF
)
Figure 7. Quad DAC Bipolar Operation (4-Quadrant Multiplication)
Analog Output
(DAC A OR DAC B)
+V
+V
0
–V
–V
–V
REF
REF
REF
REF
REF
128
127
128
128
128
127
128
128
1
1
–11–
APPLICATION HINTS
General Ground Management: AC or transient voltages be-
tween AGND and DGND can appear as noise at the DAC8408’s
analog output. Note that in Figures 5 and 6, I
I
ommended that AGND and DGND be tied together at the
DAC8408 socket. In systems where AGND and DGND are tied
together on the backplane, two diodes (1N914 or equivalent)
should be connected in inverse parallel between AGND and
DGND.
Write Enable Timing: During the period when both DS and
R/W are held low, the DAC latches are transparent and the ana-
log output responds directly to the digital data input. To pre-
vent unwanted variations of the analog output, the R/W should
not go low until the data bus is fully settled (DATA VALID).
OUT 2C
/I
OUT 2D
are connected to AGND. Therefore, it is rec-
DAC8408
OUT2A
/I
OUT2B
and

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