MP7528LS データシートの表示（PDF） - Exar Corporation

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MP7528LS

CMOS Dual Buffered Multiplying 8-Bit Digital-to-Analog Converter

Exar Corporation 

MICROPROCESSOR INTERFACE

A0-A15

VMA

CPU

6800 φ2

Address Bus

A*

Address

Decode

Logic

A+1**

DACA/DACB

CS DAC A

MP7528

WR

DB0

DB7

DAC B

D0–D7

Data Bus

Analog circuitry has been omitted for clarity

*A = Decoded 7528 DAC A Address

**A + 1 = Decoded 7528 DAC B Address

Figure 2. MP7528 Dual DAC to 6800

CPU Interface

MP7528

A8-A15

CPU

8085

WR

ALE

Address Bus

A*

Address

Decode

Logic

A+1**

Latch

8212

DACA/DACB

CS DAC A

MP7528

WR

DAC B

DB0

DB7

AD0–AD7

ADDR/Data Bus

Analog circuitry has been omitted for clarity

*A = Decoded 7528 DAC A Address

**A + 1 = Decoded 7528 DAC B Address

NOTE:

8085 instruction SHLD (store H & L direct) can update

both DACS with data from H and L registers

Figure 3. MP7528 Dual DAC to 8085

CPU Interface

PERFORMANCE CHARACTERISTICS

Graph 1. Relative Accuracy vs. Digital Code

5V

Rev. 2.00

9

Graph 2. Relative Accuracy vs. Digital Code

15 V

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