DAC8143FS Analog Devices Inc, DAC8143FS Datasheet - Page 12

• Manufacturer Part Number: DAC8143FS
• Description: IC DAC 12BIT DAISY-CHAIN 16-SOIC
• Manufacturer: Analog Devices Inc

Specifications of DAC8143FS

• Rohs Status: RoHS non-compliant
• Settling Time: 380ns
• Number Of Bits: 12
• Data Interface: Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 500µW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)

DAC8143
DAC8143 INTERFACE TO THE 8085
The DAC8143’s interface to the 8085 microprocessor is shown
in Figure 22. Note that the microprocessor’s SOD line is used
to present data serially to the DAC.
Data is strobed into the DAC8143 by executing memory write
instructions. The strobe 2 input is generated by decoding an
address location and WR. Data is loaded into the DAC register
with a memory write instruction to another address location.
Serial data supplied to the DAC8143 must be present in the
right-justified format in registers H and L of the microprocessor.
0.210 (5.33)
0.160 (4.06)
0.115 (2.93)
MAX
PIN 1
FROM SYSTEM RESET
0.022 (0.558)
0.014 (0.356)
Figure 22. DAC8143—8085 Interface
8085
SOD
ALE
*
16
WR
ANALOG CIRCUITRY OMITTED FOR SIMPLICITY
1
0.840 (21.34)
0.745 (18.92)
(8)
(8) AD
0.100
(2.54)
BSC
16-Lead Plastic DIP
8212
0–7
+5V
0.070 (1.77)
0.045 (1.15)
9
8
(N-16)
+5V
0.280 (7.11)
0.240 (6.10)
0.060 (1.52)
0.015 (0.38)
DATA
SEATING
PLANE
ADDRESS BUS (16)
SRI
STB
STB
STB
LD
0.130
(3.30)
MIN
E
E
E
1
1
3
2
3
1
4
A
LD
DAC8143*
0
A
DECODER
ADDRESS
–A
0
74LS138
2
0.325 (8.25)
0.300 (7.62)
15
CLR
STB
A
0.015 (0.381)
0.008 (0.204)
2
SRO
2
Dimensions are shown in inches and (mm).
0.195 (4.95)
0.115 (2.93)
OUTLINE DIMENSIONS
–12–
DAC8143 INTERFACE TO THE 68000
Figure 23 shows the DAC8143 configured to the 68000 micro-
processor. Serial data input is similar to that of the 6800 in
Figure 21.
68000 P
0.0118 (0.30)
0.0040 (0.10)
PIN 1
DB
VMA
UDS
VPA
DB
A
AS
A
23
15
Figure 23. DAC8143 to 68000 P Interface
1
0
16
1
0.050 (1.27)
0.4133 (10.50)
0.3977 (10.00)
1/4 74HC125
BSC
CS
0.0192 (0.49)
0.0138 (0.35)
FROM SYSTEM RESET
DECODER
ADDRESS
0.1043 (2.65)
0.0926 (2.35)
9
8
16-Lead SOIC
SEATING
PLANE
0.2992 (7.60)
0.2914 (7.40)
ADDRESS BUS
(R-16W)
DATA BUS
+5V
0.4193 (10.65)
0.3937 (10.00)
0.0125 (0.32)
0.0091 (0.23)
+
8
0
STB
STB
STB
SRI
LD
0.0291 (0.74)
0.0098 (0.25)
1
3
2
4
STB
DAC8143
0.0500 (1.27)
0.0157 (0.40)
CLR
1
LD
45
REV. C
2