AD664BE Analog Devices Inc, AD664BE Datasheet - Page 18

• Manufacturer Part Number: AD664BE
• Description: IC,D/A CONVERTER,QUAD,12-BIT,BICMOS,LLCC,44PIN
• Manufacturer: Analog Devices Inc

Specifications of AD664BE

• 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: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-CLCC

AD664
Simple AD664 to MC68000 Interface
Figure 28 shows an AD664 connected to an MC68000. In this
memory-mapped I/O scheme, the “left-justified” data is written
in one 12-bit input word. Four address bits are used to perform
the on-chip D/A selection as well as the various operating fea-
tures. The R/W signal controls the RD function and system
reset controls RST.
Figure 28. AD664 to MC68000 Interface
–18–
This scheme can be converted to write “right-justified’’ data by
connecting the data inputs to DATA bits D0 through D11
respectively. Other options include controlling the QS0, QS1
and QS2 pins with UDS and LDS to provide a way to write
8-bit input and read 8-bit output words.
REV. C