AD664TD-BIP Analog Devices Inc, AD664TD-BIP Datasheet - Page 13

• Manufacturer Part Number: AD664TD-BIP
• Description: IC DAC 12BIT QUAD BIPOLR 28-CDIP
• Manufacturer: Analog Devices Inc

Specifications of AD664TD-BIP

• Rohs Status: RoHS non-compliant
• Settling Time: 8µs
• Number Of Bits: 12
• Data Interface: Parallel
• Number Of Converters: 4
• Voltage Supply Source: Dual ±
• Power Dissipation (max): 525mW
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 28-CDIP (0.600", 15.24mm)

AD664
Expansion of the scheme employed in Figure 25a results in that
shown in Figure 25c. Here, two AD664s are connected to an
MC6801, providing a total of eight 12-bit, software program-
mable DACs. Again, the three least significant bits of address
are used to select the on-chip registers of the AD664. IOS and
E, as well as a fourth address bit, are decoded to provide the
appropriate CS signals. Four address and five I/O lines remain
uncommitted.
A slightly more sophisticated approach to system expansion is
illustrated in Figure 25d. Here, a 74LS138 (1-of-8 decoder) is
used to address one of the eight AD664s connected to the
MC6801. The three least significant address bits are used to
select on-chip register and DAC. The next three address bits are
used to select the appropriate AD664. IOS and E gate the
74LS138 output.
Figure 25a. Simple AD664 to MC6801 Interface
Figure 25b. Alternate AD664 to MC6801 Interface
Figure 25c. Interfacing Two AD664s to an MC6801
REV. C
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