MP7543
APPLICATION NOTES
Refer to Section 8 for Applications Information
(8)
ADDRESS BUS (16)
ADDRESS BUS (16)
A0-15
ADDRESS (16)
ADDRESS (16)
A0-15
8085
ALE
6800
R/W
E1
E1
8212
φ2
DECODER
DECODER
8205
8205
E3
E2
E3
E2
+5 V
WR
D0
D7
DATA BUS (8)
DATA (8)
DATA (8)
(8) AD0-7
DATA
SOD
SR1 LD2 STB2
STB3
SR1 LD2 STB1
STB3
+5 V
+5 V
MP7543
MP7543
STB1
STB4
STB2
STB4
LD1
LD1
CLR
CLR
FROM SYSTEM RESET
FROM SYSTEM RESET
Figure 1. MP7543 8085 Interface
Figure 2. MP7543 MC6800 Interface
Digital Input
V
IN
R
FB
I
V
REF
OUT1
MP7543
I
OUT2
–
+
V
OUT
Figure 3. Digitally Programmable
Gain Amplifier
Graph 1. Relative Accuracy vs. Digital Code
Rev. 2.00
7
EXAR [ EXAR CORPORATION ]
