AD664 Analog Devices, AD664 Datasheet - Page 15

• Manufacturer Part Number: AD664
• Description: Monolithic 12-Bit Quad DAC
• Manufacturer: Analog Devices

Specifications of AD664

• Resolution (bits): 12bit
• Dac Update Rate: 125kSPS
• Dac Settling Time: 8µs
• Max Pos Supply (v): +16.5V
• Single-supply: No
• Dac Type: Voltage Out
• Dac Input Format: Byte,Nibble,Par

REV.
IBM PC* Interface
Figure 27 illustrates a simple interface between an IBM PC and
an AD664. The three least significant address bits are used to
select the Quad and DAC. The next two address bits are used
for LS and MS. In this scheme, a 12-bit input word requires
two load cycles, an 8-bit word and a 4-bit word. Another write
*IBM PC is a trademark of International Business Machines Corp.
D
Figure 27. AD664 to IBM PC Interface
Figure 26. AD664 to 8051 Interface
–15–
is required to transfer the word or words previously written to
the second rank. A 12-bit-wide word again requires at least two
read cycles; one for the 8 MSBs and four for the LSBs. The
page select signal produces a CS strobe for any address from
300H to 31FH.
AD664